CN106246156A - Method made by a kind of explosion fracturing acidifying connection - Google Patents
Method made by a kind of explosion fracturing acidifying connection Download PDFInfo
- Publication number
- CN106246156A CN106246156A CN201610712207.0A CN201610712207A CN106246156A CN 106246156 A CN106246156 A CN 106246156A CN 201610712207 A CN201610712207 A CN 201610712207A CN 106246156 A CN106246156 A CN 106246156A
- Authority
- CN
- China
- Prior art keywords
- explosion fracturing
- fracturing
- explosion
- acidifying
- electric pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004880 explosion Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000002253 acid Substances 0.000 claims abstract description 51
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 50
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 238000001802 infusion Methods 0.000 claims abstract description 33
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 239000003513 alkali Substances 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000005474 detonation Methods 0.000 claims abstract description 7
- 238000005457 optimization Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 29
- 238000010521 absorption reaction Methods 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 230000007797 corrosion Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 239000003721 gunpowder Substances 0.000 claims description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 11
- 239000003129 oil well Substances 0.000 claims description 7
- 230000000903 blocking effect Effects 0.000 claims description 6
- 229910003638 H2SiF6 Inorganic materials 0.000 claims description 5
- 229910004039 HBF4 Inorganic materials 0.000 claims description 5
- 239000003112 inhibitor Substances 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000001376 precipitating effect Effects 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 5
- ZEFWRWWINDLIIV-UHFFFAOYSA-N tetrafluorosilane;dihydrofluoride Chemical compound F.F.F[Si](F)(F)F ZEFWRWWINDLIIV-UHFFFAOYSA-N 0.000 claims description 5
- 238000011010 flushing procedure Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 230000003245 working effect Effects 0.000 claims description 3
- -1 iron ion Chemical class 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims 5
- 239000007864 aqueous solution Substances 0.000 claims 1
- 229910052742 iron Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000704 physical effect Effects 0.000 abstract description 2
- 230000020477 pH reduction Effects 0.000 abstract 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 230000010354 integration Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005336 cracking Methods 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 210000004185 liver Anatomy 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000002535 acidifier Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 239000009096 changqing Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Pipeline Systems (AREA)
Abstract
The invention discloses a kind of explosion fracturing acidifying connection and make method, the method includes that explosion fracturing is acidified combination operation process parameter optimization, before explosion fracturing, operation preparation and pit shaft fill liquid, formation testing absorbtivity before explosion fracturing, under enter explosion fracturing working string to the predetermined operation degree of depth, tubing string pressurization is detonated, kill-job operation, play detonation fracturing work tubing string, explosion fracturing terminates rear formation testing absorbtivity, under enter acidizing treatment tubing string, infusion acid solution slug, play acidizing treatment tubing string, under enter electric pump flow string and electric pump discharge opeing and well head adds alkali and neutralizes, under produce Y tubing string without electric pump stifled for Y, infusion acid solution slug, throw Y to block up, electric pump discharge opeing and well head add in alkali and etc. step.Its advantage is: can further enhance explosion fracturing and acidizing effect, strengthens acid solution injectability, expands acidizing radius, and prevents crack closure further, strengthens physical effect；The effect of explosion fracturing can be strengthened, select postorder acidification step flexibly, job step can be saved while ensureing operation effectiveness.
Description
Technical field
The present invention relates to oil gas field formation acidizing fracture technology field, more particularly, it relates to this technology
Method made by a kind of explosion fracturing acidifying connection in field.
Background technology
Explosion fracturing is also called high enegry gas fracturing, is to utilize gunpowder or propellant combustion to produce high temperature and high pressure gas pair
Stratum carries out a technological means of pressure break, and Acidizing Technology is also a technological means conventional in oilfield stimulation measure.
At present, explosion fracturing and acidifying are combined connection and make by oil field at home, i.e. enter with the complex method of physics and chemistry
Row volume increase.Physics i.e. explosion fracturing, it can make stratum form radial multiple cracking oil flow channel, strengthen acid solution injectability, expand
Big acidizing radius；Chemistry is i.e. acidified, and can release the blocking of nearly well, link up infiltration lane, prevent crack closure further, strengthen physics
Effect.Recover the oil in such as oil field, Eastern South China Sea Lufeng, Nanyang, henan oil extraction No.1 Factory, Changqing oilfields oil extraction No.1 Factory, Shenyang, Liaohe Oil Field
Factory, ore deposit, southwest, Sichuan Petroleum Administration river and Chuan Nan ore deposit the most once carried out explosion fracturing acidifying integration of operation, achieved generally acknowledged ratio
The geological effect that single acidizing effect is far better.
The patent of invention of Publication No. CN1182166A discloses " a kind of efficient gas pressure-cracking method ", and the method uses solid
Body acid fuel acidifier, combines explosion fracturing and acidifying, is mainly released to HCl, is suitable for Carbonate Reservoir or completion is dirty
Operation when contaminating serious.The utility model patent of Publication No. CN200975241Y discloses " a kind of Gas impelling Sewing Device ",
Simply outline this device and have perforation, acidifying, gas pressure break combine action function, owing to the enforcement of this technology uses same
Casing string is carried out, therefore the quickly row's of returning effect after not possessing the acidifying of electric pump flow string.The invention of Publication No. CN101113669A
Patent disclosure " a kind of fracturing process improving low permeability reservoir production capacity ", the method is mainly used in improving low permeability reservoir production capacity, can
Effectively combined by high enegry gas fracturing and acidic fracturing fluid, diversion agent, acid solution etc., strengthen conventional fracturing effect, do not have suitable
Answering property and motility.
In sum, so far, the domestic one that still lacks is suitable for electric pump flow string, sandstone and carbonate reservoir
And the explosion fracturing connection of postorder acidizing treatment can be selected to make method according to explosion fracturing situation.
Summary of the invention
The purpose of the present invention overcomes the deficiencies in the prior art exactly, and provides a kind of explosion fracturing acidifying connection work side for this
Method, thus expand the scope of application of explosion fracturing acidifying combined tech.
The technical scheme is that
Method made by a kind of explosion fracturing acidifying connection, comprises the following steps:
(1) explosion fracturing acidifying combination operation process parameter optimization:
Described process parameter optimizing includes the design of explosion fracturing gunpowder consumption, the design of explosion fracturing working string, acid solution
Slug design, the design of acid solution treatment radius, acidizing treatment pressure and discharge capacity design, acidizing treatment design of string pipe；
(2) before explosion fracturing, operation prepares, and pit shaft fills liquid:
Before described explosion fracturing operation prepare to include preparing enough Active workings, be equipped with fire-fighting equipment, to play former well raw
Produce tubing string, drifting, scraping, well-flushing, testing pressure of well head, preparation work equipment and accessory work, described liquid be water or KCl water-soluble
Liquid；
(3) formation testing absorbtivity before explosion fracturing；
Described formation testing absorbtivity is under the conditions of oil well pressure limiting, liquid infusion speed before test explosion fracturing.
(4) explosion fracturing working string is entered under to the predetermined operation degree of depth:
The described predetermined operation degree of depth is explosion fracturing well in operation section；
(5) tubing string pressurization is detonated:
Described pressurization is detonated for being suppressed by liquid, carries out explosion fracturing and detonates operation；
(6) kill-job operation；
(7) detonation fracturing work tubing string is played；
(8) explosion fracturing terminates rear formation testing absorbtivity:
Described formation absorption amount is liquid infusion speed after explosion fracturing under the conditions of oil well pressure limiting；
In (8th) step:
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time more than 3 hours, then hold
Row step:
(9) acidizing treatment tubing string is entered under；
(10) infusion acid solution slug:
Described acid solution slug includes and is not limited to prepad fluid, main acid, after pad and displacement fluid；
(11) kill-job operation；
(12) acidizing treatment tubing string is played；
(13) entering electric pump flow string, electric pump discharge opeing under, well head adds alkali and neutralizes:
Described electric pump flow string includes that electric pump produces Y tubing string, electric pump produces straight tube post.
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time within 3 hours, then
Execution step:
(9) Y tubing string is produced without electric pump stifled for Y under；
(10) infusion acid solution slug；
(11) throw Y to block up:
Described Y blocks up the instrument into blocking oil pipe operation path, is dropped in blanking plug seat；
(12) electric pump discharge opeing, well head adds alkali and neutralizes.
In in above method:
The gunpowder consumption that described explosion fracturing gunpowder consumption is designed with is: the surge pressure P peak produced in the earth formation
=(1.1-2.0) × P breaks, and P peak-P breaks ＜ P set and resists, wherein: P is broked into formation fracture pressure, and P set resists and resists intrinsic pressure value for sleeve pipe.
Described acid solution slug design includes and is not limited to prepad fluid, main acid, after pad and displacement fluid；
Described prepad fluid and after pad consist of 5-15%HCl, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrum from
Sub-stabilizer, surplus is water；
Described displacement fluid consist of 1-2% expansion-resisting agent, surplus is water.
Described main acid has three kinds of building forms:
1,5-15%HCl, 5-10%HBF4, 10-30%H2SiF6, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrum from
Sub-stabilizer, 6-8% precipitating inhibitor, surplus is water；
2,10-30%HCl, 1-15% thickening agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability,
Surplus is water；
3,10-30%HCl, 2-10% diversion agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability,
Surplus is water；
The main acid of the 1st kind of building form is used for sandstone reservoir；
2nd kind is used for carbonate reservoir with the main acid of the 3 kinds of building forms in ground.
Described " after explosion fracturing, formation absorption amount calculates, it is contemplated that be acidified total liquid measure infusion time more than more than 3 hours or
Within 3 hours ", in the case of after referring to not consider infusion acidifying, discharge capacity increases, with being acidified total liquid measure divided by test detonation pressure
Split the time of rear liquid infusion speed gained more than 3 hours or within 3 hours.
Instant invention overcomes many deficiencies of prior art, it provides the benefit that:
(1) (electric pump flow string is the important composition portion that artificial lift is recovered the oil to be applicable to electric pump flow string operation
Point), it is particularly suited for offshore oilfield operation；
(2) it is adapted to sandstone and carbonate reservoir operation, is simultaneously adapted to organic plugging de-plugging；
(3) can further enhance explosion fracturing and acidizing effect, it is radial that explosion fracturing therein can make stratum be formed
Multiple cracking oil flow channel, strengthens acid solution injectability, expands acidizing radius；Acidifying therein can release the blocking of nearly well, and communication is oozed
Passage thoroughly, prevents crack closure further, strengthens physical effect；
(4) acidizing treatment pressure can be promoted to make up explosion fracturing work close to packer pressure limiting, beneficially acidifying further
Industry effect；If formation absorption amount increases ideal after explosion fracturing, use electric pump to produce Y tubing string and carry out acidizing treatment, can save
Kill-job operation and remove acidifying tubing string operation routine, lowers kill-job operation to formation damage, is acidified simultaneously and can release
A front kill-job operation, to formation damage, is additionally acidified and also can realize the quickly row of returning；
(5) effect of explosion fracturing can be strengthened, by the further kluftkarren of acid solution and release near wellbore zone contamination and plugging,
It is not only suitable for electric pump flow string operation, and is adapted to sandstone and carbonate reservoir operation, select postorder acidifying flexibly
Step, can save job step while ensureing operation effectiveness.
Accompanying drawing explanation
Fig. 1 is the workflow schematic diagram of the present invention.
Fig. 2 is LF13-1 oil field 26H well explosion fracturing tubing string schematic diagram.
Fig. 3 is LF13-1 oil field 26H well acidizing tubing string schematic diagram.
Fig. 4 is that LF13-1 oil field 6 depth well pump produces Y tubing string schematic diagram.
Fig. 5 is that LF13-1 oil field 6 depth well pump produces straight tube post schematic diagram.
Fig. 6 is acidizing treatment curve chart after the 26H well explosion fracturing of 13-1 oil field, Lufeng.
Fig. 7 is acidizing treatment curve chart after the well explosion fracturing of 13-1 oil field 6, Lufeng.
Detailed description of the invention
Be understood for making the present invention be easier to, below in conjunction with drawings and Examples to technical scheme and
Technique effect is explained in detail.
Method made by a kind of explosion fracturing acidifying connection of the present invention, comprises the following steps:
(1) explosion fracturing acidifying combination operation process parameter optimization:
Described process parameter optimizing includes the design of explosion fracturing gunpowder consumption, the design of explosion fracturing working string, acid solution
Slug design, the design of acid solution treatment radius, acidizing treatment pressure and discharge capacity design, acidizing treatment design of string pipe；
(2) before explosion fracturing, operation prepares, and pit shaft fills liquid:
Before described explosion fracturing operation prepare to include preparing enough Active workings, be equipped with fire-fighting equipment, to play former well raw
Produce tubing string, drifting, scraping, well-flushing, testing pressure of well head, preparation work equipment and accessory work, described liquid be water or KCl water-soluble
Liquid；
(3) formation testing absorbtivity before explosion fracturing；
Described formation testing absorbtivity is under the conditions of oil well pressure limiting, liquid infusion speed before test explosion fracturing.
(4) explosion fracturing working string is entered under to the predetermined operation degree of depth:
The described predetermined operation degree of depth is explosion fracturing well in operation section；
(5) tubing string pressurization is detonated:
Described pressurization is detonated for being suppressed by liquid, carries out explosion fracturing and detonates operation；
(6) kill-job operation；
(7) detonation fracturing work tubing string is played；
(8) explosion fracturing terminates rear formation testing absorbtivity:
Described formation absorption amount is liquid infusion speed after explosion fracturing under the conditions of oil well pressure limiting；
In (8th) step:
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time more than 3 hours, then hold
Row step:
(9) acidizing treatment tubing string is entered under；
(10) infusion acid solution slug:
Described acid solution slug includes and is not limited to prepad fluid, main acid, after pad and displacement fluid；
(11) kill-job operation；
(12) acidizing treatment tubing string is played；
(13) entering electric pump flow string, electric pump discharge opeing under, well head adds alkali and neutralizes:
Described electric pump flow string includes that the electric pump shown in Fig. 4 produces the electric pump shown in Y tubing string and Fig. 5 and produces straight tube
Post.
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time within 3 hours, then
Execution step:
(9) Y tubing string is produced without electric pump stifled for Y under；
(10) infusion acid solution slug；
(11) throw Y to block up:
Described Y blocks up the instrument into blocking oil pipe operation path, is dropped in blanking plug seat；
(12) electric pump discharge opeing, well head adds alkali and neutralizes.
In aforesaid step (1):
Described explosion fracturing working string is designed as the instrument such as drilling rod or heavy wall tubing, amortisseur, initiator, bear gun
Combination.
The gunpowder consumption that described explosion fracturing gunpowder consumption is designed with is: the surge pressure P peak produced in the earth formation
=(1.1-2.0) × P breaks, and P peak-P breaks ＜ P set and resists, wherein: P is broked into formation fracture pressure, and P set resists and resists intrinsic pressure value for sleeve pipe.
Described acid solution slug design includes and is not limited to prepad fluid, main acid, after pad and displacement fluid；
Described prepad fluid and after pad consist of 5-15%HCl, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrum from
Sub-stabilizer, surplus is water；
Described displacement fluid consist of 1-2% expansion-resisting agent, surplus is water.
Described main acid has three kinds of building forms:
1,5-15%HCl, 5-10%HBF4, 10-30%H2SiF6, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrum from
Sub-stabilizer, 6-8% precipitating inhibitor, surplus is water；
2,10-30%HCl, 1-15% thickening agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability,
Surplus is water；
3,10-30%HCl, 2-10% diversion agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability,
Surplus is water；
The main acid of the 1st kind of building form is used for sandstone reservoir；
2nd kind is used for carbonate reservoir with the main acid of the 3 kinds of building forms in ground.
Described acid solution treatment radius is designed as 0.5-2m；
Described acidizing treatment pressure P≤η × PBroken+Pf-Ph, wherein: η is safety coefficient, for 0.8-0.9, PBrokenBreak for stratum
Split pressure, PfFor frictional resistance, PhFor head of liquid；
Described operational discharge capacity 0.1-1.5m3/ min, in the case of limiting operation pressure, discharge capacity is lifted up as far as possible；
The described combination that acidizing treatment design of string pipe is the instrument such as drilling rod or heavy wall tubing, packer, sliding sleeve.
In aforesaid step (10):
Described acid solution slug includes and is not limited to prepad fluid, main acid, after pad and displacement fluid, refers to have according to stratum
Machine stopping state, increases organic cleaning fluid before prepad fluid.
Described organic cleaning fluid is dimethylbenzene, diesel oil, 0.05-0.2%FC4430 fluorocarbon surfactant or 50-70%
Polyoxyethylene fatty amine is combined hydrocarbon；
" formation absorption amount calculating after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time super described in abovementioned steps (8)
Spend more than 3 hours or within 3 hours ", in the case of after referring to not consider infusion acidifying, discharge capacity increases, remove with being acidified total liquid measure
With the time of liquid infusion speed gained after test explosion fracturing more than 3 hours or within 3 hours.
Electric pump in abovementioned steps (13) produces Y tubing string, electric pump production straight tube post is two kinds of oil well production strings, and electric pump is raw
Blocking up without Y if produced in the oil pipe of Y tubing string, oil pipe can be kept unimpeded, implement acidizing treatment, block up if putting into Y, then block oil pipe
Operation path, carries out electric pump and returns the residual acid of row and production.
Embodiment 1:
The explosion fracturing acidifying connection of LF13-1 oil field 26H well applies the explosion fracturing tubing string shown in Fig. 2 and Fig. 3 is institute
The acidifying tubing string shown.
Explosion fracturing gunpowder consumption described in step (1) is 40kg, and the surge pressure produced through simulation 40kg is
60MPa, this well formation fracture pressure is 45.5MPa, and surge pressure is 1.3 times of formation fracture pressures, and this casing resists and intrinsic pressure is
47.3MPa, meets PPeak-PBroken＜ PSet is anti-；Acidifying slug is as shown in table 1.
Table 1LF13-1 oil field 26H well acid solution slug scale
Acid solution treatment radius is designed as 1.3m；Acidizing treatment pressure P≤16MPa；Operational discharge capacity 0.1-1.5m3/ min,
In the case of limiting operation pressure, discharge capacity is lifted up as far as possible；Acidizing treatment design of string pipe is shown in Fig. 5.
Acid solution slug described in step (10) includes prepad fluid, main acid, after pad and displacement fluid, and they are respectively as follows:
Prepad fluid and after pad consist of 5-15%HCl, 1-2%HSJ corrosion inhibiter, 1-2%FP-02 expansion-resisting agent, 1-2%
TL-01 ferrous stability, surplus is water；
Main acid consists of 5-15%HCl, 5-10%HBF4, 10-30%H2SiF6, 1-2%HJS corrosion inhibiter, 1-2%FP-
02 expansion-resisting agent, 1-2%TL-01 ferrous stability, 6-8%FCY-06 precipitating inhibitor, surplus is water；
Displacement fluid consists of 1-2%FP-02 expansion-resisting agent, and surplus is water.
Described medicament is provided by Tianjin Tiancheng Chemical Co., Ltd..
In step (8), " explosion fracturing terminates rear formation testing absorbtivity, it is contemplated that be acidified total liquid measure infusion time little more than 3
More than time or within 3 hours " formation absorption amount is 0.69bpm@2300psi before 26H well explosion fracturing；After explosion fracturing
Formation absorption amount is 1.3bpm@2300psi；Being acidified total liquid measure is 29m3, i.e. 182.4bbl, then the total liquid measure infusion of anticipated acidifying
Time is 182.4 ÷ 1.3 ÷ 60 ≈ 2.3 hours, therefore enters electric pump under using and produce Y tubing string acidifying pattern.
As shown in Figure 6, before explosion fracturing, formation absorption amount is for this embodiment explosion fracturing and acidifying integration of operation effect
0.69bpm@2300psi；After explosion fracturing, formation absorption amount is 1.3bpm@2300psi；After acidifying, formation absorption amount is
2.0bpm@2300psi, first 2.9 times of formation absorption amount soothing the liver, effect is notable.
Before this well operations, Liquid output is 65bpd, and after operation, Liquid output reaches 752bpd, for before 11.6 times, and accumulative increasing
Oil 0.16 ten thousand sides, it is notable that implementation result made by connection.
Embodiment 2:
The explosion fracturing acidifying connection of LF13-1 oil field 6 well applies Y tubing string described in Fig. 4 and the straight tube post described in Fig. 5.
Explosion fracturing gunpowder consumption described in step (1) is 20kg, and the surge pressure produced through simulation 20kg is
50.2MPa, this well formation fracture pressure is 44.6MPa, and surge pressure is 1.1 times of formation fracture pressures, and this casing resists intrinsic pressure
For 56.2MPa, meet PPeak-PBroken＜ PSet is anti-；Acidifying slug is as shown in table 2.
Table 2LF13-1 oil field 6 well acid solution slug scale
Acid solution treatment radius is designed as 2.0m；Acidizing treatment pressure P≤15.86MPa；Operational discharge capacity 0.1-1.5m3/ min,
In the case of limiting operation pressure, discharge capacity is lifted up as far as possible.
Acid solution slug described in step (10) includes prepad fluid, main acid, after pad and displacement fluid, and they are respectively as follows:
Prepad fluid and after pad consist of 5-15%HCl, 1-2%HSJ corrosion inhibiter, 1-2%FP-02 expansion-resisting agent, 1-2%
TL-01 ferrous stability, surplus is water；
Main acid consists of 5-15%HCl, 5-10%HBF4, 10-30%H2SiF6, 1-2%HJS corrosion inhibiter, 1-2%FP-
02 expansion-resisting agent, 1-2%TL-01 ferrous stability, 6-8%FCY-06 precipitating inhibitor, surplus is water；
Displacement fluid consists of 1-2%FP-02 expansion-resisting agent, and surplus is water.
Described medicament is provided by Tianjin Tiancheng Chemical Co., Ltd..
In step (8), " explosion fracturing terminates rear formation testing absorbtivity, it is contemplated that be acidified total liquid measure infusion time little more than 3
More than time or within 3 hours " formation absorption amount is 0.5bpm@1500psi before 6 well explosion fracturing；After explosion fracturing
Layer absorbtivity is 1.72bpm@1500psi, and being acidified total liquid measure is 60m3, i.e. 377.34bbl, then the total liquid measure infusion of anticipated acidifying
Time is 377.34 ÷ 1.72 ÷ 60 ≈ 3.7 hours, enters to be acidified tubing string acidifying pattern under therefore using.
This embodiment explosion fracturing and acidifying integration of operation effect as it is shown in fig. 7, before explosion fracturing formation absorption amount be
0.5bpm@1500psi；After explosion fracturing, formation absorption amount is 1.72bpm@2300psi；After acidifying, formation absorption amount is
5.83bpm@2300psi, first 11.7 times of formation absorption amount soothing the liver, effect is notable.
Calculating with individual well, before integration of operation, Liquid output is 779bpd, and after integration of operation, Liquid output reaches 1858bpd, for it
Front 2.4 times, increase oil 1.55 ten thousand sides from May, 2015 to 1 month to date in 2016, and it is notable that method implementation result made by connection.
Above in association with drawings and Examples, technical scheme is schematically described, but the present invention not office
It is limited to above-mentioned detailed description of the invention.It will be apparent to an ordinarily skilled person in the art that in actual applications, in the present invention each
The detailed description of the invention of step is likely to occur some and changes, and other staff are likely to dream up similar skill under it enlightens
Art scheme.Special needs to be pointed out is, without departing from the design aim of the present invention, all obvious changes, all comprise
Within protection scope of the present invention.
Claims (6)
1. method made by an explosion fracturing acidifying connection, it is characterised in that: the method comprises the following steps:
(1) explosion fracturing acidifying combination operation process parameter optimization:
Described process parameter optimizing includes the design of explosion fracturing gunpowder consumption, the design of explosion fracturing working string, acid solution slug
Design, the design of acid solution treatment radius, acidizing treatment pressure and discharge capacity design, acidizing treatment design of string pipe；
(2) before explosion fracturing, operation prepares, and pit shaft fills liquid:
Before described explosion fracturing, operation prepares to include preparing enough Active workings, is equipped with fire-fighting equipment, plays former well and produce pipe
Post, drifting, scraping, well-flushing, testing pressure of well head, preparation work equipment and accessory work, described liquid is water or KCl aqueous solution；
(3) formation testing absorbtivity before explosion fracturing；
Described formation testing absorbtivity is under the conditions of oil well pressure limiting, liquid infusion speed before test explosion fracturing.
(4) explosion fracturing working string is entered under to the predetermined operation degree of depth:
The described predetermined operation degree of depth is explosion fracturing well in operation section；
(5) tubing string pressurization is detonated:
Described pressurization is detonated for being suppressed by liquid, carries out explosion fracturing and detonates operation；
(6) kill-job operation；
(7) detonation fracturing work tubing string is played；
(8) explosion fracturing terminates rear formation testing absorbtivity:
Described formation absorption amount is liquid infusion speed after explosion fracturing under the conditions of oil well pressure limiting；
In (8th) step:
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time more than 3 hours, then perform step
Rapid:
(9) acidizing treatment tubing string is entered under；
(10) infusion acid solution slug:
(11) kill-job operation；
(12) acidizing treatment tubing string is played；
(13) entering electric pump flow string, electric pump discharge opeing under, well head adds alkali and neutralizes:
Described electric pump flow string includes that electric pump produces Y tubing string, electric pump produces straight tube post.
If calculated according to formation absorption amount after explosion fracturing, it is contemplated that be acidified total liquid measure infusion time within 3 hours, then perform
Step:
(9) Y tubing string is produced without electric pump stifled for Y under；
(10) infusion acid solution slug；
(11) throw Y to block up:
Described Y blocks up the instrument into blocking oil pipe operation path, is dropped in blanking plug seat；
(12) electric pump discharge opeing, well head adds alkali and neutralizes.
Method made by explosion fracturing the most according to claim 1 acidifying connection, it is characterised in that: the detonation described in step (1)
The gunpowder consumption that pressure break gunpowder consumption is designed with is: surge pressure P peak=(the 1.1-2.0) × P produced in the earth formation breaks, and
It is anti-, wherein that P peak-P breaks ＜ P set: P is broked into formation fracture pressure, and P set resists and resists intrinsic pressure value for sleeve pipe.
Method made by explosion fracturing the most according to claim 1 acidifying connection, it is characterised in that: the acid solution described in step (1)
Slug design includes and is not limited to prepad fluid, main acid, after pad and displacement fluid.
Method made by explosion fracturing the most according to claim 3 acidifying connection, it is characterised in that: described prepad fluid and after pad
Consisting of 5-15%HCl, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability, surplus is water.
Method made by explosion fracturing the most according to claim 3 acidifying connection, it is characterised in that: described main acid has three kinds of groups
One-tenth mode:
(1) 5-15%HCl, 5-10%HBF4, 10-30%H2SiF6, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% iron ion
Stabilizer, 6-8% precipitating inhibitor, surplus is water；
(2) 10-30%HCl, 1-15% thickening agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability, surplus
For water；
(3) 10-30%HCl, 2-10% diversion agent, 1-2% corrosion inhibiter, 1-2% expansion-resisting agent, 1-2% ferrous stability, surplus
For water.
Method made by explosion fracturing the most according to claim 1 acidifying connection, it is characterised in that: " the detonation described in step (8)
After pressure break, formation absorption amount calculates, it is contemplated that be acidified total liquid measure infusion time more than more than 3 hours or within 3 hours ", refer to not
In the case of after considering infusion acidifying, discharge capacity increases, with being acidified total liquid measure divided by liquid infusion speed gained after test explosion fracturing
Time more than 3 hours or within 3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712207.0A CN106246156B (en) | 2016-08-23 | 2016-08-23 | A kind of explosion fracturing acidification connection makees method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712207.0A CN106246156B (en) | 2016-08-23 | 2016-08-23 | A kind of explosion fracturing acidification connection makees method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246156A true CN106246156A (en) | 2016-12-21 |
| CN106246156B CN106246156B (en) | 2018-12-14 |
Family
ID=57595191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610712207.0A Active CN106246156B (en) | 2016-08-23 | 2016-08-23 | A kind of explosion fracturing acidification connection makees method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246156B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222911A (en) * | 2017-12-27 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of horizontal bare hole well volume increase completion tubular column and connection make method |
| CN108756845A (en) * | 2018-05-03 | 2018-11-06 | 肖毅 | A kind of dilatation increment explosion fracturing method |
| CN113494271A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Shaft blockage removing method and device for high-pressure gas well |
| CN114135265A (en) * | 2021-10-19 | 2022-03-04 | 中海油能源发展股份有限公司 | Low-cost and high-efficiency transformation process method for low-permeability reservoir of offshore oilfield |
| CN114893162A (en) * | 2022-03-15 | 2022-08-12 | 中海油能源发展股份有限公司 | Horizontal screen well reservoir transformation process method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182166A (en) * | 1997-12-23 | 1998-05-20 | 杨学政 | Efficient gas fracturing method |
| CN200975241Y (en) * | 2006-11-28 | 2007-11-14 | 北京通盛威尔工程技术有限公司 | Gas impelled into seam equipment |
| CN101113669A (en) * | 2007-07-18 | 2008-01-30 | 长庆石油勘探局 | Fracturing process for enhancing low permeability reservoir deliverability |
| CA2646168A1 (en) * | 2007-12-21 | 2009-06-21 | Schlumberger Canada Limited | Method of treating subterranean reservoirs |
| CN101781982A (en) * | 2010-02-25 | 2010-07-21 | 中国石油化工股份有限公司 | Short-injection water injection well acidation injectivity process |
| CN201531261U (en) * | 2009-11-11 | 2010-07-21 | 西安通源石油科技股份有限公司 | Deflagration fracturing device used in cased well |
| CN102337878A (en) * | 2011-10-16 | 2012-02-01 | 北方斯伦贝谢油田技术（西安）有限公司 | Thermal-ignition high-energy gas pulse fracturing device |
| CN203626790U (en) * | 2013-11-26 | 2014-06-04 | 西安通源石油科技股份有限公司 | Horizontal-well staged fracturing device |
| CN104121004A (en) * | 2014-07-15 | 2014-10-29 | 中北大学 | Method for modifying reservoir stratum by using ground detonation gas |
| CN105625946A (en) * | 2016-01-25 | 2016-06-01 | 中国石油大学(北京) | Supercritical CO2 jet cavity creation and multi-stage synchronous deflagration fracturing method for coalbed methane horizontal wells |
-
2016
- 2016-08-23 CN CN201610712207.0A patent/CN106246156B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182166A (en) * | 1997-12-23 | 1998-05-20 | 杨学政 | Efficient gas fracturing method |
| CN200975241Y (en) * | 2006-11-28 | 2007-11-14 | 北京通盛威尔工程技术有限公司 | Gas impelled into seam equipment |
| CN101113669A (en) * | 2007-07-18 | 2008-01-30 | 长庆石油勘探局 | Fracturing process for enhancing low permeability reservoir deliverability |
| CA2646168A1 (en) * | 2007-12-21 | 2009-06-21 | Schlumberger Canada Limited | Method of treating subterranean reservoirs |
| CN201531261U (en) * | 2009-11-11 | 2010-07-21 | 西安通源石油科技股份有限公司 | Deflagration fracturing device used in cased well |
| CN101781982A (en) * | 2010-02-25 | 2010-07-21 | 中国石油化工股份有限公司 | Short-injection water injection well acidation injectivity process |
| CN102337878A (en) * | 2011-10-16 | 2012-02-01 | 北方斯伦贝谢油田技术（西安）有限公司 | Thermal-ignition high-energy gas pulse fracturing device |
| CN203626790U (en) * | 2013-11-26 | 2014-06-04 | 西安通源石油科技股份有限公司 | Horizontal-well staged fracturing device |
| CN104121004A (en) * | 2014-07-15 | 2014-10-29 | 中北大学 | Method for modifying reservoir stratum by using ground detonation gas |
| CN105625946A (en) * | 2016-01-25 | 2016-06-01 | 中国石油大学(北京) | Supercritical CO2 jet cavity creation and multi-stage synchronous deflagration fracturing method for coalbed methane horizontal wells |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108222911A (en) * | 2017-12-27 | 2018-06-29 | 中国海洋石油集团有限公司 | A kind of horizontal bare hole well volume increase completion tubular column and connection make method |
| CN108222911B (en) * | 2017-12-27 | 2020-03-20 | 中国海洋石油集团有限公司 | Horizontal open hole well production increasing completion pipe string and combined operation method |
| CN108756845A (en) * | 2018-05-03 | 2018-11-06 | 肖毅 | A kind of dilatation increment explosion fracturing method |
| CN113494271A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Shaft blockage removing method and device for high-pressure gas well |
| CN114135265A (en) * | 2021-10-19 | 2022-03-04 | 中海油能源发展股份有限公司 | Low-cost and high-efficiency transformation process method for low-permeability reservoir of offshore oilfield |
| CN114135265B (en) * | 2021-10-19 | 2023-09-29 | 中海油能源发展股份有限公司 | Low-cost and high-efficiency transformation process method for low-permeability reservoir of offshore oil field |
| CN114893162A (en) * | 2022-03-15 | 2022-08-12 | 中海油能源发展股份有限公司 | Horizontal screen well reservoir transformation process method |
| CN114893162B (en) * | 2022-03-15 | 2023-07-28 | 中海油能源发展股份有限公司 | Horizontal screen pipe well reservoir transformation process method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106246156B (en) | 2018-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105089603B (en) | Reservoir transformation method for forming fracture network by temporary plugging and steering in fracture | |
| CN106246156B (en) | A kind of explosion fracturing acidification connection makees method | |
| CN107313762B (en) | Shale hydraulic fracturing method | |
| CN109337660B (en) | A kind of low-pressure carbonate reservoir gas well temporary plugging workover fluid and preparation and application method thereof | |
| CN104963671B (en) | A kind of fracturing reform method of High angle from formula well reservoir | |
| CN103484088B (en) | A kind of unblocking agent and acidification to dispel block method being applicable to complex lithology reservoir acidifying | |
| CN105041289B (en) | Method for forming multiple seams by temporarily blocking seam and forcibly turning plane | |
| CN104963672B (en) | Reservoir stratum transformation method for forming seam net by temporarily blocking blast holes with clean steering materials | |
| CN105505360A (en) | Fluoroboric acid blocking remover and acidification de-blocking method | |
| CN104295275A (en) | Deep blockage removal and injection increase method for water injection well of medium-and-high-permeability sandstone reservoir | |
| CN105670584B (en) | Temporary plugging kill fluid suitable for repairing low-permeability low-pressure gas well and preparation method thereof | |
| CN101353958A (en) | Oil-gas well exploitation temperature control variable mucic acid fracturing method | |
| CA3046917C (en) | Enhancing complex fracture networks in subterranean formations | |
| CN109294541B (en) | Fire flooding well self-degradation temporary plugging agent and preparation method and application thereof | |
| CN107654215B (en) | A method of coal bed gas well is transform as coal measures gas well | |
| Aqui et al. | Permeability enhancement of conventional geothermal wells | |
| CN105255467A (en) | Compound plug removal agent for tight sandstone oil reservoir | |
| CN108049855A (en) | A kind of MH acid construction technology suitable for sandstone reservoir transformation | |
| CN103821486B (en) | A kind of new chemical is handled up method for increasing | |
| CN108756845A (en) | A kind of dilatation increment explosion fracturing method | |
| CN102977876A (en) | Guar gum fracturing fluid with ultralow concentration and low-temperature coal-bed gas well fracturing method | |
| CN117801800A (en) | Environment-friendly autogenous acid fracturing fluid for relieving and inhibiting injuries | |
| RU2012114259A (en) | METHOD FOR INCREASING OIL, GAS CONDENSATES AND GAS PRODUCTION FROM DEPOSITS AND ENSURING UNINTERRUPTED OPERATION OF PRODUCING AND EXPRESSIVE WELLS | |
| CN108457633B (en) | Intralayer selective fracturing method | |
| CN109294544B (en) | Non-oxidized polymer chemical blockage removal gel breaker and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC Energy Development Co., Ltd. Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Development Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |