CN108266171A - Method for repeatedly modifying production increase based on complex fracture network - Google Patents
Method for repeatedly modifying production increase based on complex fracture network Download PDFInfo
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- CN108266171A CN108266171A CN201711441441.5A CN201711441441A CN108266171A CN 108266171 A CN108266171 A CN 108266171A CN 201711441441 A CN201711441441 A CN 201711441441A CN 108266171 A CN108266171 A CN 108266171A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 230000009466 transformation Effects 0.000 claims abstract description 17
- 238000010276 construction Methods 0.000 claims abstract description 15
- 239000003129 oil well Substances 0.000 claims abstract description 10
- 230000008901 benefit Effects 0.000 claims abstract description 3
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 7
- YLOCGHYTXIINAI-XKUOMLDTSA-N (2s)-2-amino-3-(4-hydroxyphenyl)propanoic acid;(2s)-2-aminopentanedioic acid;(2s)-2-aminopropanoic acid;(2s)-2,6-diaminohexanoic acid Chemical compound C[C@H](N)C(O)=O.NCCCC[C@H](N)C(O)=O.OC(=O)[C@@H](N)CCC(O)=O.OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 YLOCGHYTXIINAI-XKUOMLDTSA-N 0.000 claims description 6
- 102000016726 Coat Protein Complex I Human genes 0.000 claims description 6
- 108010092897 Coat Protein Complex I Proteins 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 239000003381 stabilizer Substances 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 239000004035 construction material Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000006073 displacement reaction Methods 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 abstract 1
- 206010017076 Fracture Diseases 0.000 description 21
- 208000010392 Bone Fractures Diseases 0.000 description 20
- 239000003921 oil Substances 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 239000013589 supplement Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 238000005213 imbibition Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000000502 dialysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- 241000169624 Casearia sylvestris Species 0.000 description 1
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- 239000000295 fuel oil Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 210000000867 larynx Anatomy 0.000 description 1
- LNOPIUAQISRISI-UHFFFAOYSA-N n'-hydroxy-2-propan-2-ylsulfonylethanimidamide Chemical compound CC(C)S(=O)(=O)CC(N)=NO LNOPIUAQISRISI-UHFFFAOYSA-N 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a method for repeatedly transforming and increasing production based on a complex fracture network, which is characterized in that plugging solution is injected into a target interval to remove formation wax and inorganic scale, and then repeated fracturing construction is carried out in a non-support mode, so that the transformation volume of a reservoir is enlarged, the formation energy is supplemented, fracturing fluid is not discharged back after the fracturing construction is finished, and the old well production increase is realized through well stewing and pressure expansion. The method for repeatedly reconstructing and increasing the yield based on the complex fracture network, provided by the invention, has the advantages that firstly, repeated fracturing construction is carried out by adopting a 'large-displacement, low-abrasion, anti-sliding, water-sliding and support-free' mode, the reconstruction volume of a reservoir is further enlarged on the basis of the original complex fracture network, and the formation energy is supplemented; and secondly, by soaking, the low-abrasion anti-slip slick water and residual oil in the medium and small pore throats or matrixes are dialyzed and replaced under the action of capillary pressure, so that the oil well yield and the ultimate recovery rate are improved.
Description
Technical field
The invention belongs to In Oil Field Exploration And Development underground work technical fields, and in particular to one kind is based on complex fracture network weight
The method of multiple transformation volume increase.
Background technology
Ordos Basin compact oil reservoir generally has the reservoir characteristic of poor permeability and the development of natural microcrack, in pressure break
In construction use for reference " volume fracturing " theory, by optimize the technologies such as discharge capacity, low liquid viscosity reach seam in net pressure crack open
Open condition so that extend along major fracture wall surface and link up a plurality of secondary fracture and microcrack, finally form complexity in the earth formation and split
Network is stitched, so as to increase substantially single well productivity after pressure.Compact oil reservoir oil well in the production process after volume fracturing, in order to
Natural depletion is reduced, stratum energy is often supplemented using water injection well, but due to compact oil reservoir poor permeability, anisotropism
By force, well water absorbing capacity is not strong after water filling, oil well is caused to take effect slowly or be not achieved uniform water filling, it is difficult to establish effective displacement
System, stratum energy cannot be supplemented fully, while the major fracture of extensive " volume fracturing " formation and latasuture have been linked up naturally
Cracking initiation complex fracture network when being developed using water filling supplement energy, there is the risk for causing Fractured water logging.
Invention content
The purpose of the present invention is overcoming problem above of the prior art, a kind of complex fracture network that is based on is provided and repeats to change
The method for making volume increase further expands transformation volume, and the remaining oil in middle or small pore throat or matrix is replaced in imbibition, improves oil well production
Amount and ultimate recovery.
For this purpose, technical solution provided by the invention is as follows：
A kind of method that transformation volume increase is repeated based on complex fracture network releases stratum wax by injecting blockages relieving fluid in interval of interest
And inorganic scale, then refracturing construction is carried out using no supporting way, expand reservoir reconstruction volume and supplement stratum energy, pressure break
Constructed the rear fracturing fluid not row of returning, and by stewing well diffusion, realizes old well volume increase.
A kind of method that transformation volume increase is repeated based on complex fracture network, is as follows：
Step 1）Prepare construction material：Prepare blockages relieving fluid, active water and the slippery water of design flow；
Step 2）Refracturing construction is carried out using no supporting way：
（1）To target zone with 1.0-3.0m3The discharge capacity injection blockages relieving fluid of/min；
（2）To target zone with 4.0-8.0m3The discharge capacity of/min injects active water as prepad fluid；
（3）To target zone with 4.0-8.0m3The discharge capacity injection slippery water of/min；
Step 3）After interval of interest refracturing has been constructed, the row of returning, progress wellhead shut-in do not boil in a covered pot over a slow fire well 20-30 days to fracturing fluid.
The blockages relieving fluid is the aqueous solutions of organic acids that mass percent is 8-12%.
By the material composition of following mass percent, 0.25% water-soluble friction reducer, 0.5%COP-1 glue the slippery water
Soil stabilizer, 0.9% surfactant, remaining is water.
The active water by the material composition of following mass percent, live by 0.5%COP-1 clay stabilizers, 0.9% surface
Property agent, remaining is water.
For implementing the oil well of volume fracturing and production decline.
The beneficial effects of the invention are as follows：
This method that transformation volume increase is repeated based on complex fracture network provided by the invention, first, using " huge discharge, low friction resistance
Slippery water, without support " mode carries out refracturing construction, further expanding reservoir on the basis of original complex fracture network changes
Volume is made, and supplements stratum energy；Second is that by boiling in a covered pot over a slow fire well, under the action of capillary pressure, low friction resistance slippery water is in, aperture
Dialysis displacement occurs for the remaining oil in larynx or matrix, so as to improve oil well output and ultimate recovery.
It will be described in further details below.
Specific embodiment
Embodiment 1：
A kind of method that transformation volume increase is repeated based on complex fracture network is present embodiments provided, is solved by being injected in interval of interest
Stifled lyolysis carries out refracturing construction except stratum wax and inorganic scale, then using no supporting way, expands reservoir reconstruction volume and benefit
Fill stratum energy, the fracturing fluid not row of returning, by stewing well diffusion, realizes that old well increases production after pressing crack construction is complete.
After compact oil reservoir oil well " volume fracturing ", complex fracture network is formed, using waterflooding extraction, oil well may be caused to split
The water logging of seam property, simultaneously because compact oil reservoir poor permeability, anisotropism are strong, waterflooding extraction is difficult to set up effective displacement system, ground
Layer energy cannot be supplemented effectively, and production decline is fast.In order to be solved the above problems with relatively low cost, the present invention is celebrated according to long
Oil field compact oil reservoir feature, crustal stress, rock mechanics, Characteristics of The Matural Fractures and refracturing technique etc. are to " volume fracturing " technique
It is optimized, and combines water injection technology of handling up, provide a kind of new method that transformation volume increase is repeated based on complex fracture network
（Without support fracturing）.On the basis of the complex fracture network that the process is formed at original " volume fracturing ", blockages relieving fluid is injected,
Release primary fissure seam network de stratum wax and inorganic scale.And then continue " volume fracturing " theory, using " huge discharge, low friction resistance are slided
Slip water, without support " mode carries out refracturing construction, in fracturing process the part in crack turn to, shearing slip and wall surface it is thick
Rough property promotes fracture surface at a fully engaged, forms the residual porosities space with certain flow conductivity, and split in original complexity
Increasingly complex fracture network is formed on the basis of seam network, further expands reservoir reconstruction volume, supplements stratum energy.Finally,
By boiling in a covered pot over a slow fire well, under the action of capillary force, fracturing fluid is replaced with the remaining oil imbibition in middle or small pore throat or matrix, is realized old
Well increases production and improves productivity, and it is horizontal to improve compact oil reservoir whole development.
Embodiment 2：
On the basis of embodiment 1, a kind of method that transformation volume increase is repeated based on complex fracture network, tool are present embodiments provided
Body step is as follows：
Step 1）Prepare construction material：Prepare blockages relieving fluid, active water and the slippery water of design flow；
Step 2）Refracturing construction is carried out using no supporting way：
（1）To target zone with 1.0-3.0m3The discharge capacity injection blockages relieving fluid of/min；
（2）To target zone with 4.0-8.0m3The discharge capacity of/min injects active water as prepad fluid；
（3）To target zone with 4.0-8.0m3The discharge capacity injection slippery water of/min；
Step 3）After interval of interest refracturing has been constructed, the row of returning, progress wellhead shut-in do not boil in a covered pot over a slow fire well 20-30 days to fracturing fluid.
Blockages relieving fluid is for releasing stratum wax and inorganic scale, and interval of interest is with 4.0m3/ min injects low friction resistance slippery water, does not add
Add proppant, implement " volume fracturing " and repeat rebuilding construction, reach the mesh for expanding reservoir reconstruction volume and supplementing stratum ability
's；After interval of interest has been constructed, the row of returning, progress wellhead shut-in do not boil in a covered pot over a slow fire well 20-30 days to fracturing fluid, reach fracturing fluid dialysis displacement
The purpose of middle or small pore throat or matrix remaining oil.
In the present embodiment, the blockages relieving fluid is the aqueous solutions of organic acids that mass percent is 8-12%.
By the material composition of following mass percent, 0.25% water-soluble friction reducer, 0.5%COP-1 glue the slippery water
Soil stabilizer, 0.9% surfactant, remaining is water.
The active water by the material composition of following mass percent, live by 0.5%COP-1 clay stabilizers, 0.9% surface
Property agent, remaining is water.
Embodiment 3：
In the present embodiment, de-plugging formula of liquid is as follows：Sulfamic acid, hydrochloric acid, acetic acid, the mix acid liquor 10% of citric acid are (mixed
Close concentration), fuel oil 20%, isopropanol 5%, Sulfonates ZF-SA16 and polyoxyethylene ether O P-10 surfactants
5.0%, corrosion inhibiter 0.5%, ammonium chloride 1.5%, remaining is water.
The preparation process of water-soluble drag reducer is shown in patent 201310552770.2, the surface-active in slippery water and active water
Agent is negative and positive system surfactant, and preparation process is shown in patent 201310044456.3.
This new method that transformation volume increase is repeated based on complex fracture network provided by the invention（Without support fracturing）Being will
Volume fracturing and the technology that water injection technology is combined of handling up.The present invention in interval of interest by injecting blockages relieving fluid, " big
Discharge capacity, low friction resistance slippery water, without support " technological processes such as pressure break, stewing well, release stratum wax and inorganic scale, reproduce complex fracture
Network, supplement stratum energy, imbibition displace in, aperture shout or matrix in remaining oil, realize the purpose that old well increases production and improves productivity.
20 mouthfuls of wells of field conduct, test well well yield are increased to more than 2.0t by the 0.7t before measure, effective to improve
Well yield, on the basis of aqueous stabilization, effectively raises the recovery ratio of oil well.The process is simply easy
Row, cost is relatively low, can increase substantially oil field productivity effect.
The component or the well-known components of the method category industry or common technology means that the present embodiment does not describe in detail, here
No longer describe one by one.
The foregoing examples are only illustrative of the present invention, does not form the limitation to protection scope of the present invention, all
Be with the present invention it is the same or similar design all belong to the scope of protection of the present invention within.
Claims (6)
- A kind of 1. method that transformation volume increase is repeated based on complex fracture network, it is characterised in that：It is solved by being injected in interval of interest Stifled lyolysis carries out refracturing construction except stratum wax and inorganic scale, then using no supporting way, expands reservoir reconstruction volume and benefit Fill stratum energy, the fracturing fluid not row of returning, by stewing well diffusion, realizes that old well increases production after pressing crack construction is complete.
- 2. a kind of method that transformation volume increase is repeated based on complex fracture network according to claim 1, it is characterised in that：Tool Body step is as follows：Step 1）Prepare construction material：Prepare blockages relieving fluid, active water and the slippery water of design flow；Step 2）Refracturing construction is carried out using no supporting way：（1）To target zone with 1.0-3.0m3The discharge capacity injection blockages relieving fluid of/min；（2）To target zone with 4.0-8.0m3The discharge capacity of/min injects active water as prepad fluid；（3）To target zone with 4.0-8.0m3The discharge capacity injection slippery water of/min；Step 3）After interval of interest refracturing has been constructed, the row of returning, progress wellhead shut-in do not boil in a covered pot over a slow fire well 20-30 days to fracturing fluid.
- 3. a kind of method that transformation volume increase is repeated based on complex fracture network according to claim 2, it is characterised in that：Institute It is the aqueous solutions of organic acids that mass percent is 8-12% to state blockages relieving fluid.
- 4. a kind of method that transformation volume increase is repeated based on complex fracture network according to claim 2, it is characterised in that：Institute State material composition of the slippery water by following mass percent, 0.25% water-soluble friction reducer, 0.5%COP-1 clay stabilizers, 0.9% surfactant, remaining is water.
- 5. a kind of method that transformation volume increase is repeated based on complex fracture network according to claim 2, it is characterised in that：Institute State material composition of the active water by following mass percent, 0.5%COP-1 clay stabilizers, 0.9% surfactant, remaining For water.
- It is 6. special according to a kind of method that transformation volume increase is repeated based on complex fracture network of claim 1-5 any one of them Sign is：For implementing the oil well of volume fracturing and production decline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711441441.5A CN108266171A (en) | 2017-12-27 | 2017-12-27 | Method for repeatedly modifying production increase based on complex fracture network |
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| CN201711441441.5A CN108266171A (en) | 2017-12-27 | 2017-12-27 | Method for repeatedly modifying production increase based on complex fracture network |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952663A (en) * | 2018-08-15 | 2018-12-07 | 中国石油大学(北京) | The live fracturing process of complicated seam net is generated using interval pressure break mode |
| CN112253068A (en) * | 2020-09-16 | 2021-01-22 | 中国石油天然气股份有限公司 | Method for improving cumulative yield of compact oil fracturing horizontal well |
| CN115961920A (en) * | 2021-10-11 | 2023-04-14 | 大庆油田有限责任公司 | Energy storage and yield increase method for tight oil reservoir |
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| CN101693830A (en) * | 2009-10-28 | 2010-04-14 | 中联煤层气国家工程研究中心有限责任公司 | Low-cost water-based clean fracturing fluid and gel breaking fluid used for fracturing |
| CN103244097A (en) * | 2013-05-16 | 2013-08-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Multi-crack fracturing control method for medium-depth coal beds |
| CN105927198A (en) * | 2016-04-27 | 2016-09-07 | 中国石油天然气股份有限公司 | Energy supplementing and fracturing yield increasing integrated repeated transformation method for old well of tight oil reservoir |
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2017
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| CN101693830A (en) * | 2009-10-28 | 2010-04-14 | 中联煤层气国家工程研究中心有限责任公司 | Low-cost water-based clean fracturing fluid and gel breaking fluid used for fracturing |
| CN103244097A (en) * | 2013-05-16 | 2013-08-14 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Multi-crack fracturing control method for medium-depth coal beds |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952663A (en) * | 2018-08-15 | 2018-12-07 | 中国石油大学(北京) | The live fracturing process of complicated seam net is generated using interval pressure break mode |
| CN108952663B (en) * | 2018-08-15 | 2019-10-18 | 中国石油大学(北京) | The live fracturing process of complicated seam net is generated using interval pressure break mode |
| US10947830B2 (en) | 2018-08-15 | 2021-03-16 | China University of Petroleum—Beijing | Fracturing method for creating complex crack network by intermittent fracturing on site |
| CN112253068A (en) * | 2020-09-16 | 2021-01-22 | 中国石油天然气股份有限公司 | Method for improving cumulative yield of compact oil fracturing horizontal well |
| CN115961920A (en) * | 2021-10-11 | 2023-04-14 | 大庆油田有限责任公司 | Energy storage and yield increase method for tight oil reservoir |
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