CN108547607B - Wide-band acidizing seam-making method for low-yield well of low-permeability oil field - Google Patents
Wide-band acidizing seam-making method for low-yield well of low-permeability oil field Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 120
- 239000002689 soil Substances 0.000 claims abstract description 39
- 230000020477 pH reduction Effects 0.000 claims abstract description 28
- 239000002562 thickening agent Substances 0.000 claims abstract description 26
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000013329 compounding Methods 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 12
- 239000003129 oil well Substances 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 7
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims description 34
- 239000000243 solution Substances 0.000 claims description 17
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 claims description 8
- 239000004094 surface-active agent Substances 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 6
- ABBQHOQBGMUPJH-UHFFFAOYSA-M Sodium salicylate Chemical compound [Na+].OC1=CC=CC=C1C([O-])=O ABBQHOQBGMUPJH-UHFFFAOYSA-M 0.000 claims description 5
- 229960004025 sodium salicylate Drugs 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 6
- 239000011148 porous material Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000008398 formation water Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- 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
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- 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
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention relates to a wide-band acidizing and seam-making method for a low-yield well of a low-permeability oil field, which is characterized by comprising the following steps of: the method comprises the following steps: 1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 1.5-2.5% of thickening agent, 4.5-5.5% of HCl, 0.5-1.5% of HF and 91.5-92.5% of H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 4.5-5.5% of thickening agent, 14.5-15.5% of HCl, 2.5-3.5% of HF and 76-78% of H2O; 2) alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation; 3) closing the well for 1-2 hours; 4) controlling open flow after the acidification operation is finished; 5) and finishing the construction. The method mainly improves old cracks and assists corroded microcracks in high conductivity cracks, and achieves the aim of wide-band crack acidification.
Description
Technical Field
The invention relates to an acidification production-increasing transformation operation used in the transformation of a low-yield well of a low-permeability oil reservoir, in particular to a wide-band acidification seam-making method for the low-yield well of a low-permeability oil field. Belongs to the technical field of acidification used in oil exploitation.
Background
The reservoir heterogeneity of the low-permeability oil field is strong, the pressure coefficient of the producing zone is low, the yield decreasing speed is high, and stable yield is the most important foundation for ensuring the stable development of the low-permeability oil field. With the long term production of low permeability fields, thousands of wells are in critical inefficient production and increasing well production is a problem that has to be faced. In the period of low oil price of oil gas, the research on measures and technologies with low cost and high yield is more important.
For low-permeability oil fields, fracturing is the most basic and effective production increasing measure, and almost all new wells need fracturing production increasing operation to obtain industrial oil flow and realize economic development. The purpose of fracturing is to form effective supporting fractures in a reservoir, so that the oil drainage area is enlarged, the oil flow resistance is reduced, and the single well yield is improved. In the oilfield exploitation mode mainly based on water injection development, the direction and the geometric dimension of a fracturing crack of an oil well must have a reasonable matching mode with a water injection well so as to achieve higher recovery ratio.
In actual work, due to the limitation of practical conditions, the problems of crack scaling and blockage, low yield of an oil well, high water content and the like often occur in the exploitation process of the oil well, and the problems have complex reasons. In order to increase the production of single well of old well, large-scale repeated fracturing is usually adopted, and although some oil wells achieve the ideal effect of increasing the production, the large-scale repeated fracturing is often impossible for most of low-efficiency wells. This repeated modification is very destructive to the production pattern and can affect the recovery of the overall reservoir and other production problems that have to be faced in the field production.
Acidification is the best measure for removing the blockage of the old well, but the acidification is influenced by the liquid performance of the acidification and acidification equipment, the blockage removing measure can only play a role in the original artificial crack, cannot realize the functions of re-crack formation and multi-crack formation in the artificial crack, and the yield increasing effect is limited.
Disclosure of Invention
The invention aims to provide a wide-band acidizing and seam making method for a low-yield well of a low-permeability oil field, which utilizes acid liquids with different acid liquid concentrations, different thickener concentrations and different construction discharge capacities to continuously generate viscosity change in the flowing process of an old fracture, so that the flowing acid liquids generate a fracturing pulse effect and an acid liquid system viscosity high-low fluctuation effect, and the swept range of an acidizing liquid is increased.
The technical scheme of the invention is as follows: a wide-band acidizing seam-making method for a low-yield well of a low-permeability oil field is characterized by comprising the following steps of: the method comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 1.5-2.5% of thickening agent, 4.5-5.5% of HCl, 0.5-1.5% of HF and 91.5-92.5% of H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 4.5-5.5% of thickening agent, 14.5-15.5% of HCl, 2.5-3.5% of HF and 76-78% of H2O；
2) Alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) and finishing the construction.
The earth acid A in the step 1) is prepared by compounding the following raw materials in percentage by mass: 2% thickener, 5% HCl, 1% HF and 92% H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 5% thickener, 15% HCl, 3% HF and 77% H2O。
The thickening agent is prepared from the following raw materials in percentage by mass: 45% of bisamide disulfonate gemini surfactant, 28% of methanol, 12% of sodium salicylate and 15% of water.
The molecular formula of the bisamide disulfonate gemini surfactant is as follows:
CH3(CH2)nCON(NaO3SCH2CH2)CH2CH2N(CH2CH2SO3Na)OC(CH2)nCH3wherein n is a natural number of 6 to 14.
The specific process of the step 2) is as follows: firstly according to the discharge capacity of 0.2-0.5m3Permin injection of soil acid A1.0 m3Then the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3And then the discharge capacity is changed to 0.2-0.5m3Permin injection of soil acid A1.0 m3Finally, the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3And injecting the acid liquid A and the acid liquid B in a circulating and alternating mode until the acid liquid is completely pumped into the well, and then replacing the acid liquid into the stratum by using clean water.
The acid liquor viscosity of the soil acid A and the acid liquor viscosity of the soil acid B are both 10-80 mPa.s.
The 2-earth acid solution prepared in the step 1) is suitable for treating oil layer transformation of a low-yield well of a low-permeability oil field within 80 ℃.
The invention has the beneficial effects that: by utilizing the change of the acid liquid concentration, the change of the thickener concentration and the change of the construction discharge capacity, the acid liquid continuously generates viscosity change in the flowing process of the old reservoir fractures, so that the flowing acid liquid generates a fracturing pulse effect and an acid liquid system viscosity high-low fluctuation effect, the acid liquid enters the microcracks for corrosion, but under the control of the acid liquid viscosity, the acid liquid can not excessively corrode and generate plunging in the deeply corroded microcracks, and a broadband acidification wave coverage range is formed on the surface of the reservoir fractures. The matrix reservoir can form a 'rubber plug' in the pore throat due to the influence of the pore throat structure of the matrix reservoir, reservoir minerals and formation water, the matrix can be protected from secondary damage, the whole liquid system can break the rubber automatically after construction is finished, and the viscosity is lower than 5 mPa.s. The acid solution is adjusted by the concentration of the thickening agent, the viscosity of the acid solution can be controlled to be 10-80 mPa.s, and the acid solution is suitable for treating low-permeability oil field low-production well oil layer transformation within 80 ℃. The method mainly improves old cracks and assists corroded microcracks in high conductivity cracks, and achieves the aim of wide-band crack acidification.
Detailed Description
Example 1
A wide-band acidizing and seam making method for a low-yield well of a low-permeability oilfield comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 1.5-2.5% of thickening agent, 4.5-5.5% of HCl, 0.5-1.5% of HF and 91.5-92.5% of H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 4.5-5.5% of thickening agent, 14.5-15.5% of HCl, 2.5-3.5% of HF and 76-78% of H2O; the thickening agent is prepared from the following raw materials in percentage by mass: 45% of bisamide disulfonate gemini surfactant, 28% of methanol, 12% of sodium salicylate and 15% of water;
2) alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) and finishing the construction.
Example 2
A wide-band acidizing and seam making method for a low-yield well of a low-permeability oilfield comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 2% thickener, 5% HCl, 1% HF and 92% H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 5% thickener, 15% HCl, 3% HF and 77% H2And O. The thickening agent is prepared from the following raw materials in percentage by mass: 45% of bisamide disulfonate gemini surfactant, 28% of methanol, 12% of sodium salicylate and 15% of water;
2) alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) and finishing the construction.
Example 3
A wide-band acidizing and seam making method for a low-yield well of a low-permeability oilfield comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 2% thickener, 5% HCl, 1% HF and 92% H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 5% thickener, 15% HCl, 3% HF and 77% H2And O. The thickening agent is prepared from the following raw materials in percentage by mass: 45% of bisamide disulfonate gemini surfactant, 28% of methanol, 12% of sodium salicylate and 15% of water. The molecular formula of the bisamide disulfonate gemini surfactant is as follows:
CH3(CH2)nCON(NaO3SCH2CH2)CH2CH2N(CH2CH2SO3Na)OC(CH2)nCH3wherein n is a natural number of 6 to 14;
2) alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation; the specific process is as follows: firstly according to the discharge capacity of 0.2-0.5m3Permin injection of soil acid A1.0 m3Then the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3And then the discharge capacity is changed to 0.2-0.5m3Permin injection of soil acid A1.0 m3Finally, the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3Injecting the acid liquid A and the acid liquid B in a circulating and alternating mode until all the acid liquid is pumped into the well, and then replacing the acid liquid into the stratum by using clear water;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) and finishing the construction.
The acid liquor viscosity of the soil acid A and the acid liquor viscosity of the soil acid B are both 10-80 mPa.s.
The 2-earth acid solution prepared in the step 1) is suitable for treating oil layer transformation of a low-yield well of a low-permeability oil field within 80 ℃.
According to the invention, by utilizing the change of the acid liquid concentration, the change of the thickener concentration and the change of the construction discharge capacity, the acid liquid continuously generates viscosity change in the flowing process of the old reservoir fractures, so that the flowing acid liquid generates a fracturing pulse effect and a high-low fluctuation effect of the viscosity of an acid liquid system, and the acid liquid enters the microcracks for corrosion, but is controlled by the viscosity of the acid liquid, the acid liquid can not excessively corrode and generate plunging in the deeply corroded microcracks, and a broadband acidification swept range is formed on the surface of the reservoir fractures. The matrix reservoir can form a 'rubber plug' in the pore throat due to the influence of the pore throat structure of the matrix reservoir, reservoir minerals and formation water, the matrix can be protected from secondary damage, the whole liquid system can break the rubber automatically after construction is finished, and the viscosity is lower than 5 mPa.s. The acid solution is adjusted by the concentration of the thickening agent, the viscosity of the acid solution can be controlled to be 10-80 mPa.s, and the acid solution is suitable for treating low-permeability oil field low-production well oil layer transformation within 80 ℃. The method mainly improves old cracks and assists corroded microcracks in high conductivity cracks, and achieves the aim of wide-band crack acidification.
Example 4 (comparative example)
A conventional earth acid acidizing process comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 4.5-5.5% HCl, 0.5-1.5% HF and 93.0-95.0% H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 14.5-15.5% HCl, 2.5-3.5% HF and 81.0-83.0% H2O；
2) Alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) and finishing the construction.
The conventional earth acid acidification process has no viscosity of the invention, and can not form flow resistance in a reservoir, so that the fingering of the acid solution is caused, and the coverage of the acid solution in the reservoir can not be improved.
The parts of the embodiment not described in detail and the acronyms are common general knowledge in the industry and are not described here. The reagents involved are all available directly from the market.
Claims (3)
1. A wide-band acidizing seam-making method for a low-yield well of a low-permeability oil field is characterized by comprising the following steps of: the method comprises the following steps:
1) preparing 2 a soil acid solution, wherein each of the soil acid A and the soil acid B is 10m3(ii) a Wherein, the earth acid A is prepared by compounding the following raw materials in percentage by mass: 1.5-2.5% of thickening agent, 4.5-5.5% of HCl, 0.5-1.5% of HF and 91.5-92.5% of H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 4.5-5.5% of thickening agent, 14.5-15.5% of HCl, 2.5-3.5% of HF and 76-78% of H2O；
2) Alternately pumping the earth acid A and the earth acid B into an oil well according to the designed discharge capacity by a cement pump truck to carry out acidification operation;
3) closing the well for 1-2 hours;
4) controlling open flow after the acidification operation is finished;
5) finishing construction;
the earth acid A in the step 1) is prepared by compounding the following raw materials in percentage by mass: 2% thickener, 5% HCl, 1% HF and 92% H2O, the earth acid B is prepared by compounding the following raw materials in percentage by mass: 5% thickener, 15% HCl, 3% HF and 77% H2O；
The thickening agent is prepared from the following raw materials in percentage by mass: 45% of bisamide disulfonate gemini surfactant, 28% of methanol, 12% of sodium salicylate and 15% of water;
the molecular formula of the bisamide disulfonate gemini surfactant is as follows:
CH3(CH2)nCON(NaO3SCH2CH2)CH2CH2N(CH2CH2SO3Na)OC(CH2)nCH3wherein n is a natural number of 6 to 14;
the specific process of the step 2) is as follows: firstly according to the discharge capacity of 0.2-0.5m3Permin injection of soil acid A1.0 m3Then the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3And then the discharge capacity is changed to 0.2-0.5m3Permin injection of soil acid A1.0 m3Finally, the variable displacement is 0.5-0.8m3Injecting soil acid B1.0 m/min3Injecting the acid liquid A and the acid liquid B in a circulating and alternating mode until all the acid liquid is pumped into the well, and then replacing the acid liquid into the stratum by using clear water;
the method mainly improves old cracks and assists corroded microcracks in high conductivity cracks, and achieves the aim of wide-band crack acidification.
2. The wide-band acid-making seam method for the low-yield well of the low-permeability oilfield according to claim 1, which is characterized in that: the acid liquor viscosity of the soil acid A and the acid liquor viscosity of the soil acid B are both 10-80 mPa.s.
3. The wide-band acid-making seam method for the low-yield well of the low-permeability oilfield according to claim 1, which is characterized in that: the 2-earth acid solution prepared in the step 1) is suitable for treating oil layer transformation of a low-yield well of a low-permeability oil field within 80 ℃.
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| CN109630066A (en) * | 2019-02-27 | 2019-04-16 | 杨凌单色生物科技有限公司 | The method of low-permeability oilfield high-water-cut oil-producing well water blockoff and acidification integration of operation |
| CN113530509A (en) * | 2020-04-15 | 2021-10-22 | 中国石油天然气股份有限公司 | Continuous separate-layer fracturing method for small well and fracturing pipe column |
| CN111577237A (en) * | 2020-05-29 | 2020-08-25 | 中国海洋石油集团有限公司 | Water hammer composite fracturing process method for low-permeability oil field |
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| US7069994B2 (en) * | 2003-03-18 | 2006-07-04 | Cooke Jr Claude E | Method for hydraulic fracturing with squeeze pressure |
| CN101089118B (en) * | 2006-06-16 | 2011-08-31 | 长江大学 | Acidifying agent composition |
| CN100453157C (en) * | 2006-09-22 | 2009-01-21 | 西南石油大学 | Bisamide bissulfosalt double surface active agent, and its synthesizing method |
| CN102020983A (en) * | 2009-09-12 | 2011-04-20 | 中国石油化工股份有限公司 | Viscosity-variable diverting acid for improving stratigraphic acidified section |
| CN102115514B (en) * | 2010-10-19 | 2013-03-06 | 新疆科发环境资源股份有限公司 | Preparation method of acid liquor thickening agent |
| CN103089228B (en) * | 2011-10-28 | 2016-05-04 | 中国石油化工股份有限公司 | Sand acid fracturing method is taken in the acid of a kind of argillaceous dolomite ground surface crosslinking |
| CN104629712B (en) * | 2013-11-15 | 2018-03-09 | 中国石油天然气股份有限公司 | A kind of deep acidizing acid solution and realize low permeability sandstone reservoir deep acidizing method |
| CN106321054B (en) * | 2015-07-03 | 2018-07-17 | 中国石油化工股份有限公司 | A kind of acid fracturing method of carbonate reservoir |
| CN105041288A (en) * | 2015-07-13 | 2015-11-11 | 中国石油大学(北京) | Fractural diverting acid-fracturing method for carbonate oil-gas reservoirs |
| CN106382111B (en) * | 2015-07-28 | 2020-06-09 | 中国石油化工股份有限公司 | Method for increasing complexity of shale gas fracturing fracture |
| CN106907137B (en) * | 2015-12-23 | 2019-01-01 | 中国石油化工股份有限公司 | A kind of method of the effective water conservancy diversion in shale oil reservoir volume fracturing crack |
| CN107313762B (en) * | 2016-04-26 | 2020-05-05 | 中国石油化工股份有限公司 | Shale hydraulic fracturing method |
| CN107545088B (en) * | 2016-06-29 | 2020-06-02 | 中国石油化工股份有限公司 | Normal-pressure shale gas horizontal well volume fracturing method |
| CN106433606A (en) * | 2016-08-31 | 2017-02-22 | 四川光亚聚合物化工有限公司 | Polymer viscous acid |
| CN107246257B (en) * | 2017-06-20 | 2019-11-08 | 张哨楠 | Heterogeneous reservoir is acidified remodeling method |
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