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THE
MINISTRY OF INDUSTRY AND TRADE
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SOCIALIST
REPUBLIC OF VIETNAM
Independence - Freedom - Happiness
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No.:
10/VBHN-BCT
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Hanoi
, January 23, 2014
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DECISION
ON PROMULGATING THE REGULATION ON
PRESERVATION AND ABANDONMENT OF PETROLEUM GRILLING WELLS
Decision
No. 37/2005/QD-BCN dated November 25, 2005, of the Minister of Industry, on
promulgating the Regulation on preservation and abandonment of petroleum
drilling wells, coming into effect on December 29, 2005, corrected by:
Decision
No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry, on
correcting the Regulation on preservation and abandonment of petroleum drilling
wells, promulgated together with Decision No. 37/2005/QD-BCN dated November 25,
2005, of the Minister of Industry, coming into effect on February 24, 2006.
Pursuant
to the July 06, 1993 Petroleum Law and the June 09, 2000 Law amending and
supplementing a number of Petroleum Law;
Pursuant
to the Government’s Decree No. 48/2000/ND-CP, dated September 12, 2000, detailing
implementation of Petroleum Law;
Pursuant
to the Government’s Decree No. 55/2003/ND-CP dated May 28, 2003, defining the
functions, tasks, powers and organizational structure of the Ministry of
Industry;
At the
proposal of Director of Energy and Petroleum Department, 1
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Article
1. To promulgate together this Decision the
regulation on preservation and abandonment of petroleum grilling wells.
Article 2. This Decision takes effect 15 days after publishing on the
Gazette. The previous provisions in contrary to this Decision shall be annulled.
Article 3. The Chief of ministerial office, the Chief Inspector of
Ministry, Directors of Ministry, Directors of provincial/municipal Department
of Industry, General Director of Petroleum Corporation and heads of relevant
units shall implement this Decision.
CERTIFICATION OF CONSOLIDATED DOCUMENTS
THE MINISTER OF INDUSTRY
Vu Huy Hoang
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ON PRESERVATION AND ABANDONMENT
OF PETROLEUM GRILLING WELLS
(Promulgated together with Decision No. 37/2005/QD-BCN dated 25/11/2005 of
Minister of Industry)
Chapter
1.
GENERAL PROVISIONS
Article
1. Purpose
This
regulation is promulgated aiming to protect natural resources and natural
structure of soil, prevent acts leading creation of obstacles or tampering of marine environment status as well as mainland
environment status when carrying out activities involving preservation and abandonment
of petroleum drilling well.
Article
2. Scope of application
This
Regulation is applies to activities involving preservation and abandonment of
drilling wells which are drilled or managed by mangers or organizations,
individuals (hereinafter collectively referred to as operators) during performing
activities of petroleum research, survey and exploitation in territory, exclusive economic zones and continental shelves of the Socialist Republic of
Vietnam.
Article
3. Interpretation of terms
In this
Regulation, the below terms are construed as follows:
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2. Cement
retainer means an instrument used in the course of cement pressure pump at high
pressure in order to temporarily isolate cement flows up, down on drilling
wells. Cement retainer is a closed instrument, cannot withdraw but made
of metal which is able to drill out.
3. “Temporary
orientation” is a steel framework laid on sea bed aiming to orientate for
drilling set and conductor pipe with bid diameter; support subsea equipment and
create points to brace guide cables in wells having underground well-head.
4. “Well abandonment"
means reinforcement of cement plugs, laying of bridge plugs, cutting for
removal and withdrawal of some pipe sections in drilling wells, clearing of
obstacles surrounding wellhead.
5. "Well
ending” means abandonment or preservation of a well or a part of a petroleum
drilling well.
6. “Shooting
section” means any section of well which has propped by pipes, shot for holes
to create the circulation between wall of system and inside of well or in the
middle of various casing pipe layers.
7. “Cement
plug” means a quantity of cement mortar which is pumped into drilling well to a
defined depth in order to create a hard and solid cement block aiming to
isolate various reservoirs parts along drilling well.
8. “Bridge
Plug” means an instrument to isolate inside well which is made of metal and
rubber, easy to be drill up, often used to isolate various distance inside well
already been propped with pipes.
9. Petroleum
Corporation of Vietnam (international transaction name is PETROVIETNAM) is a state-owned
enterprise which is established by Vietnam Government in order to conduct
petroleum activities and conclude into petroleum contracts with organizations
and individuals conducting petroleum activities under the Petroleum Law.
10. “Emergency
case” includes the following events:
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b) Fire,
explosion, accidents, malfunction, broken of means, machinery, collapse, abandonment
of structure.
c)
Epidemics or quarantine.
d) Any
event or circumstance similar on nature with any aforesaid case.
Article
4. Responsibilities of operators for quality of well ending
The
approval of the Ministry of Industry for reports on drilling well ending which
are submitted by operators according to Article 8 of this Regulation shall not
exclude responsibilities of operators for quality of drilling well ending and
consequences on safety and environment arising from those drilling wells, if
there are evidences proving such drilling wells have not ended in accordance
with this Regulation.
Article
5. Preliminary well-ending plan
In
drilling plan of entire mine or each single drilling well, operators must make
preliminary well-ending plan after ending drill if these wells have not yet
been exploited.
Chapter
2.
PROCEDURES FRO APPROVAL AND
CONTENT OF WELL-ENDING PLAN
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Except
for emergency cases, before ending the drilling well, operators must send well
- ending plan not later than five (05) working days before implementation to
the Ministry of Industry for consideration and approval.
Article
7. Content of well-ending plan
A
well-ending plan must include but not only limited in the following contents:
1. Reason
of ending well
2. Basic
figures of drilling well, summary of drilling and completing wells, basic
figures of drilling well exploitation and use, quotations of geographical and
geo-physical documents of drilling well, result of measuring cementation
quality at outer of casing pipe for exploitation, reservoir pressure and
documents related to wells or walls of wells which are required to be destroyed
or preserved.
3. Structure
diagram of drilling well in which clearly stating: Depth of
well, depth to put support pipes, height of cement pole in torus space; kind
and density of solutions in drilling well and in torus spaces; equipment which
is mounted in well. For wells drilled in oblique direction and wells drilled
horizontal direction, depth of oblique cutting, vertical depth, depth along wall
of wells, angle of inclination and azimuth.
4. Method
to mount bridge plugs and cement plugs include way to mount, volume of cement
mortar and volume of pumping solutions, distance to mount and depth to mount,
method to test pressure and tonnage. For wells subject to abandonment,
it is required to clearly state method and depth of cutting pipe.
5. Plan
on clearing and exploration surrounding area of drilling wellhead before ending
wells, moving or dismantling rid.
6. Time,
duration of ending wells, plan on periodical examination for the preserved
wells.
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Article
8. Well-ending report
1. Operator
must make report about the process of ending drilling wells and hand over such
documents to the Petroleum Corporation of Vietnam within 21 days after
finishing.
2. All
figures and documents related to the work of well ending, including diagram of
actual status of wells after ending and documents collected when conducting
exploration for the final time regarding sea beds, sea surface in area
surrounding drilling wells must be enclosed with report of well ending.
Article
9. Cutting wellhead by explosives
1. Except
for special cases, operator must use mechanical method to cut, withdraw
wellhead.
Special
case, if it is required to apply method of cutting wellhead by explosives,
operator must submit an implementation plan for the Petroleum Corporation of
Vietnam to consider and submit to the Ministry of Industry for approval.
2. When
using explosives to cut wellhead and casing pipe. Operator
must absolutely abide by safety regulations involving use of explosives and
regulations on safety, environmental protection under Vietnamese law and
international common practices.
Chapter
3.
THE PRESERVATION OF WELLS
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The
operator must ensure that any well managed by him, as required for
preservation, it must satisfy the following conditions:
1. Inside
of wells always is in safe condition even when equipment of wellhead is broken
due to malfunction or being removed, wells will maintain isolation between
reservoirs with each other and reservoirs with surface.
2. Ability
of re-using wells for drilling, research, exploitation, repair and other forms
or abandonment of wells is ensured at any time in a most advantaged and safe
manner.
3. To
decrease to the minimal extent of interference of equipment for surrounding
environment.
Article
11. Classification of drilling wells which are required to preserve
Based on
conditions of drilling wells which are required to preserve, wells are divided
into 3 types:
Type 1:
Drilling wells that are required to preserve for a long term (from 3 years or
longer), including wells of which research results assume that use and
exploitation of wells bring an economic effectiveness but there is no use plan.
Type 2:
Drilling wells that are required to conduct temporary preservation (from 1-3
years), including wells stated in exploitation plan but belonging to reserve kind.
Type 3:
wells of short-term maintenance (less than 1 year), including wells which are
used, temporarily stopped operation for repair or preparation to put into use.
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1. The
process of mounting equipment or reinforcing plugs to preserve wells must
ensure to be able to control pressure accumulated under plugs before
dismantling in the process of re-opening wells.
2. For
drilling wells which are required for type-1 preservation, during preservation,
the exploitation rod must be drawn from wellhead and cement plugs or bridge
plugs are mounted to isolate the opened reservoirs. Method of mounting plugs is
similar to method stated in Articles of Chapter IV1
this Regulation.
3. Drilling
wells of type-2 preservation are allowed to let the exploitation rod set in
wells like as status of being exploited. During preservation, wells
must be in status of being filled up with solutions used for well preservation.
4. Drilling
wells of type-3 preservation, they are allowed to keep intact all status of
wells, example: valves must be closed tightly and cranks of valves are dismantled
(except for underground wellhead).
Article
13. Solutions to preserve drilling wells
The
operator must ensure that when a part or entire well is required to be
preserved in type 1 and type 2, such wells must be filled up with solution with
density which is enough to control the reservoir pressure existing in drilling
wells before conducting operations of preserving well. Preservation
solutions must be processed to prevent equipment from corrosion.
Article
14. Preservation of underground wellhead
1. For
wells with wellheads laid under sea, the orienting cable system must be cut and
revoked before moving drilling rig out from position.
2. The
inside of wellhead of preserved wells or completed wells has to be processed
against corrosion and outside of wellhead must be protected to prevent damages
due to impact and be equipped means that allow to determine position of
wellhead easily.
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Article
15. Preservation of wellheads on surface
1. Wells
which are exploited, preserved on fixed rigs must be installed Christmas tree
on top of the wellhead. All handles except examination valve must be dismounted. Branch
pipelines, pressure gauges for depression, examination must be dismounted and
must have blind flange, plugs installed in pipe plugs, pressure gauge base.
On the top of wellhead must mount a signboard size of 0.4 x 0.2 m, inscribing
name of mine, well, name of the operator in charge of preservation, beginning
time of preservation, reason and duration of preservation.
2. The
drilling wells exploited on mainland need be preserved similar to wells stated
at Clause 1 Article 152.
In addition to, these drilling wells are also protected with a fence made of reinforced concrete, size of 4m x 4m x 2m, on fence, mounting
a signboard, size of 0.4m x 0.2m, inscribing name of mine, well, the operator
in charge of preservation, the beginning time of preservation and duration of
well preservation.
Article
16. The examination frequency of the preserved wells
The
operator shall examine the preserved wells with the frequency as follows:
- Annually,
for wells which are required type-1 preservation
- Quarterly,
for wells which are required type-2 preservation.
- Monthly,
for wells which are required type-3 preservation.
Article
17. Duration of preservation
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Chapter
4.
THE ABANDONMENT OF WELLS
Article
18. General requirements
The abandonment
of wells must ensure the following requirements:
1. After
a well is destroyed, it must ensure to maintain the integrity of inside of
wells, not to happen circulation of fluids between structures or with surface
of sea beds, water surface or mainland when counter-pressure equipment or
Christmas tree on the top of wellhead has been dismounted or moved.
2. After
finishing abandonment of wells, area of sea beds or surface surrounding a
drilling well must be cleared, not let any obstacle or make the initial status
of natural environment disturbed.
Article
19. Cutting, withdrawal of casing pipes, wellheads
1. The
operator are not permitted to withdraw any casing pipe which has been laid in
inside of wells unless it has been approved in writing by Petroleum Corporation
of Vietnam and process of withdrawal must be performed in accordance with
provisions of this Regulation.
2. All
wellheads must be cut and withdrawn. The minimal depth of
cutting is 3m under the ground or sea beds, in special case; it must send
report to Petroleum Corporation of Vietnam for consideration and decision.
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a) If the
overlapping section of two casing pipes is not cementing pump, the inside casing
pipe may be cut and withdrawn. Depth of cutting pipe is based on
height of cement pole in torus spaces, which is defined through documents of
measuring geo-physical properties of drilling wells.
b) In
case of being able to exist odd pressure in torus spaces outside casing pipes,
it must chip casing pipe adjoining the below part of wellhead and must contain
the control of well by counter-pressure equipment before and during cutting
pipes.
c) Before
cutting pipes, density of fluids in drilling well must be corrected in line
with durability of stratum at pipe base in front of it.
d) It
must cut and withdraw each pipe separately. Do not cut, withdraw two
(02) casing pipes (or more) at a same cutting, except for surface casing pipe.
Article
20. Position of plugs in bare section of wells
1. Reservoirs
containing petroleum, reservoirs with abnormal pressure or reservoirs causing
lost of fluids in bare section of wells must be isolated by cement plugs
covered for entire such reservoirs adding 50m on the top and 50m at the bottom
of such reservoir (Annex - picture 1).
2. If
bare section of wells has length less than or equal to 250m and diameter less
than 215.9mm (8-1/2inch), it must lay cement plugs at position higher than the
deepest casing pipe base 50m from bottom of wells (Annex – picture 2).
3. If
bare section of wells has length more than 250m (>250m) and reservoirs in
such section of wells do not contain gas or have no abnormal pressure, only lay
a cement plug with length of 100m covering 50m above and 50m below the deepest casing
pipe base (Annex – picture 3).
4. If
bare section of wells has abnormal pressure or reservoirs containing petroleum
and drilling sets, drilling rods, casing pipes and other instruments are jammed
in that, the above equipment must be withdrawn to make clearance for the are
section of well to the ultimate level and bury, destroy such bare section of
wells in accordance with clause 1 Article 203
of this Regulation.
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1. In
order to isolate section of well which has propped by pipes with bare section
of well, it must lay a balance cement plug with length not less than 100m
covering 50m above and 50m below the deepest casing pipe base (Annex – picture
4).
2. In
case where conditions of inside of drilling well are not allowed isolating
efficiently by balance cement plug, it may apply one of following methods:
a) Method
of using bridge plug: To lay a bridge plug under casing pipe base in distance of 50m and
a cement plug with minimal length of 100m must be laid above bridge plug (Annex
- picture 5.)
b) Method
of using Cement Retainer: Casing pipe base mat be isolated by placing an instrument to hold
cement at a distance of 50m from casing pipe base, then conduct the cement
pressure pump through this instrument. Volume of cement mortar must ensure to
create a 100m-long cement plug under Cement Retainer, then placing a cement
plug with minimal height of 15m above Cement Retainer (Annex – picture 6).
c) If a
cement plug is used to isolate the overlapping section of floating plug of pipe
with previous pipe base, this cement plug must have minimal length of 100m and
be placed at distance of 50m above and 50m below in comparison with position to
hang floating casing pipe (Annex – picture 7).
d) In
case of propping pipe through salt reservoir or drift sand (drift reservoir),
to prevent case where casing pipe is distorted because reservoir is able to
flow, cement plug must be placed through space of drift reservoir to prevent
pressure from the outside. If a reservoir is able to flow
over 200m, it must place two cement plugs minimally, one plug is placed through
boundary of bottom and one plug is placed through boundary of top of such drift
reservoir (Annex – picture 8).
Article
22. Abandonment of drilling well section which has been shot to open reservoir
If well
shot to open reservoir, opened space of reservoir must be isolated orderly by
bridge plugs or both bridge plugs and cement plugs if distance is allowed. The
construction process must be performed under one of the following methods:
1. Method
of pumping cement for replacement: To place a balance cement
plug crossing the shooting section and prolong 15-30 m above and 15-30m below
from the shooting section to the nearest bridge plug (Annex - picture 9).
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3. Method
of cement pressure pump: To isolate reservoirs with abnormal pressure and prevent fluids
flowing between reservoirs and behind of casing pipe, the shot section must be
pumped cement pressure. The process of pressure pump must be perform by pumping cement in
the shot section through an Cement Retainer placed above the shot section at
least 15m (Annex – picture 11a) or a rod set associated with counter-pressure
equipment (Annex – picture 11b). Concurrently, it must
leave at least 25m cement on any pressure pump instrument which is placed in
wells.
Article
23. Measures to amend and supplement
1. Chiseling
pipe and pressure pumping: To prevent circulation of fluids
between reservoirs and torus spaces, it must have 100m cement with good
adhesion minimally inside of previous pipe base. If not
having, the last inside casing pipe must be perforated
at depth of 100m above pipe base before it and volume of cement mortar
equivalent to 100m torus space must be pressed through the perforated section
by Cement Retainer or packer with pressure not more than pressure to break
reservoir (Annex – picture 12).
2. Chiseling
pipe and circulation: If method of pressure pump cannot be performed due to the allowed
safe pressure limitation of casing pipe, it must chisel the inside casing pipe
adjoining the below part of previous casing pipe and perform cement pressure
pump up to 100m of torus space inside of the perforated section
(Annex – picture 13).
3. The perforated points as described in Clauses 1 and 2 this Article
shall be cemented like the shot sections in Article 14.
Article
24. Placing plugs in case of cutting pipe
1. When
cutting pipe for withdrawal as prescribed at clauses 2 and 3 article 194,
the cut plugs of casing pipes must be isolated under one of methods:
a) Method
of cement plug for replacement: A 100m balance cement plug shall
be used to isolate plug of pipe and prolong 50 m above and 50 m below from the cut
plug of pipe (Annex - picture 14).
b) Method
of cement pressure pump: To place an instrument to hold cement in a bigger casing pipe at
distance of 50m above the cut plug of casing pipe and conduct cement pressure
pump through instrument for pressure pump. Volume of cement mortar
must ensure to fill up 100m casing pipe below instrument of pressure pump (50m inside
and above of the cut plug of casing pipe and conduct the cement pressure pump
through instrument for pressure pump. Volume of cement mortar
must ensure to fill up 100m casing pipe below instrument of pressure pump (50m
inside and above of the cut plug of casing pipe) and 15m above Cement Retainer
(Annex – picture 15).
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3. For
drilling plugs on mainland, the cut plugs of surface pipe and conductor pipe
must be filled with cement and leveling foundation of drilling well to turn the
initial natural situation and at position of well, it must place a steel
signboard, size of 0.4m x 0.2m, clearly writing name of mine, name of drilling
well, name of operator and date of abandonment.
Article
25. Requirements involving plug test
1. Checking
position and load test of cement plug:
a) It
must wait not less than six (06) hours for congealing of cement plug, then
place instrument kit down to determine position of cement plug and use a
tonnage of not less than 10 tons to check the accuracy of position and
precipitate quality of cement plugs.
b) If a
cement plug is placed off the tentative position or fails to bear load test, it
must place other cement plug to replace and then it must re-determine position
and test load of new cement plug in way stated at point a above.
2. To
affirm isolated situation of bare section of well under the deepest casing pipe
base, cement plugs and bridge plugs as stated at Clauses 2 and 3 Article 205
must be test pressure to value higher than test pressure for receipt of
reservoir at pipe base 3450 KPa (500psi) for 15 minutes.
3. Cement
plugs and bridge plugs as stated at Clauses 1, 2, 3 and 4 Article 21 6
must be tested pressure up value higher than test pressure for receipt of
reservoir at casing pipe base 3450 KPa (500psi).
4. Cement
plugs and bridge plugs as stated at Article 22 7
must be tested pressure up value higher than reservoir pressure of space tested
for reservoir 3450 KPa (500psi).
5. Cement
plugs as stated at Clause 1 Article 24 8
must be tested pressure up value higher than test pressure for receipt at the
next casing pipe base 3450 KPa (500psi).
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Article
26. Solutions used in abandonment of wells
1. When a
part of well or entire well is destroyed, well must be filled up with solution
with a density that is sufficient to ensure for control of pressure existing in
system before conducting operations involving abandonment of well.
2. Solution
in drilling well must be processed to prevent corrosion for casing pipe.
3. For
bare sections of well, before cementing, it must place a plug of buffer
solution with high viscosity to prevent sediment cement under bottom of
drilling well.
Article
27. Cement used in abandonment of wells
Cement
used to place any cement plug in drilling well must have minimal pressure
durability of 3000KPA after cement has been congealed in duration of (08)
hours.
Article
28. Sea bed exploration when destroying wells
The
operators must ensure that after destroying a drilling well, sea bed area
surrounding top of drilling wellhead must be surveyed carefully to sure that
all obstacles have been cleared. The last documents of sea
bed survey must be enclosed report on destroying wells as prescribed in Article
8 of this Regulation.
Chapter
5.
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Article
29. Examination and inspection
Petroleum
Corporation of Vietnam has right to conduct regular examinations with frequency
as prescribed in Article 199
of this Regulation or irregular examinations over activities of the operators
involving abandonment or preservation of wells.
In
necessary case, the Ministry of Industry shall assume the prime responsibility
for, and coordinate with Petroleum Corporation of Vietnam in establishing
inspectorate team to examine, inspect activities of the operators involving abandonment
or preservation of wells. In all cases, the operators must facilitate for examination and
inspection teams to complete task.
Article
30. Supervision of implementation
The
Ministry of Industry and Petroleum Corporation of Vietnam shall guide and
supervise the operators in compliance with this Regulation.
Article
31. Powers of supervisors
Standing
supervisors on the field who are appointed by Petroleum Corporation of Vietnam
have right to request the operators to present plans on abandonment or
preservation of wells, have right to supervise implementation during abandonment
or preservation of wells in compliance with this Regulation.
Article
32. Handling of violation
The
operators who fail to comply with this Regulation shall take all
responsibilities for arising damages, be sanctioned at penalties prescribed in
the Petroleum Law and current regulations of Vietnamese law, and have
obligations to re-perform the abandonment of well or preservation of well at
the request of the Ministry of Industry.
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THE MINISTER OF INDUSTRY AND TRADE
Hoang Trung Hai
ANNEX
DIAGRAM DECRIBING THE ENDING OF
WELLS
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1Decision
No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry, on
correcting the Regulation on preservation and destruction of petroleum drilling
wells, promulgated together with Decision No. 37/2005/QD-BCN dated November 25,
2005, of the Minister of Industry, having grounds for promulgation as follows:
“Pursuant
to the Government’s Decree No. 55/2003/ND-CP dated May 28, 2003, defining the
functions, tasks, powers and organizational structure of the Ministry of
Industry;
Pursuant
to the November 12, 1996 Law on promulgation of legal documents; the December
16, 2002 Law amending and supplementing a number of articles of Law on
promulgation of legal documents;
Pursuant
to the Government’s Decree No. 104/2004/ND-CP dated March 23, 2004, on the official gazette
of the Socialist Republic of Vietnam;
At the
proposal of Director of Energy and Petroleum Department,”
2
Article 2 of Decision No. 399/QD-BCN dated February 24, 2006, of the Minister
of Industry, on correcting the Regulation on preservation and destruction of
petroleum drilling wells, promulgated together with Decision No. 37/2005/QD-BCN
dated November 25, 2005, coming into effect on February 24, 2006, stipulated as
follows:
“Article
2. This decision takes effect on the day of its signing.
The Chief
of ministerial office, the Chief Inspector of Ministry, Directors of Ministry,
Directors of provincial/municipal Department of Industry, General Director of
Petroleum Corporation and heads of relevant units shall implement this
Decision.”
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2
Phrase “Article 26” is amended by phrase “Article 15” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and destruction of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006
3
Phrase “Article 12” is amended by phrase “Article 20” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006
4
Phrase “Article 11” is amended by phrase “Article 19” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006
5
Phrase “Article 13” is amended by phrase “Article 219” according to Article 1
of Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of
Industry, on correcting the Regulation on preservation and abandonment of
petroleum drilling wells, promulgated together with Decision No. 37/2005/QD-BCN
dated November 25, 2005, coming into effect on February 24, 2006
6
Phrase “Article 12” is amended by phrase “Article 20” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated November
25, 2005, coming into effect on February 24, 2006
7
Phrase “Article 14” is amended by phrase “Article 22” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006
8
Phrase “Article 13” is amended by phrase “Article 24” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006
9
Phrase “Article 27” is amended by phrase “Article 16” according to Article 1 of
Decision No. 399/QD-BCN dated February 24, 2006, of the Minister of Industry,
on correcting the Regulation on preservation and abandonment of petroleum
drilling wells, promulgated together with Decision No. 37/2005/QD-BCN dated
November 25, 2005, coming into effect on February 24, 2006