CN104479661A - Waterproof injury front reservoir protection operating fluid and preparation method - Google Patents
Waterproof injury front reservoir protection operating fluid and preparation method Download PDFInfo
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- CN104479661A CN104479661A CN201410690698.4A CN201410690698A CN104479661A CN 104479661 A CN104479661 A CN 104479661A CN 201410690698 A CN201410690698 A CN 201410690698A CN 104479661 A CN104479661 A CN 104479661A
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- waterproof
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- 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
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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Abstract
The invention discloses waterproof injury front reservoir protection operating fluid and a preparation method. The waterproof injury front reservoir protection operating fluid consists of the following components in percentage by mass: 0.3-0.5 percent of a workover fluid scale inhibitor, 0.5-1.0 percent of a high-efficiency penetrating agent, 0.5-1.0 percent of a waterproof treatment agent, 1.0-1.5 percent of a curing accelerator, 10-15 percent of a multifunctional cleaning agent and the balance of water. The waterproof front reservoir protection operating fluid disclosed by the invention is a weak emulsification and dispersion system and has the characteristics that the liquid is uniform in a flowing state and the oil and water are slowly separated in a static state; thickened oil and organic scale adhered to the underground sieve tube and close shaft reservoir can be effectively eliminated, and the permeability of the treatment reservoir and the surface characteristics of porous rocks are improved; the damage of reservoir porous crude oil emulsification and organic scale blockage is eliminated, and the influence of the later-stage operating fluid loss on the permeability of the reservoir is eliminated and reduced; and moreover, the reservoir fluid flowback after operation is accelerated, the oil well recovery period is shortened, and production increase and stability production of the oil well after the operation are promoted.
Description
Technical field
The present invention relates to oil extraction in oil field technical field, particularly a kind of oil well waterproof injures preposition Working Fluids for Reservoir Protection and compound method.
Background technology
The most stratum of Bohai Bay Oil belongs to hygroscopicity stratum, along with the migration of reservoir exploitation time, the heavy ingredients such as the pitch in crude oil, colloid, wax are adsorbed on formation rock surface, and form the film that one deck is special, domestic and international most of document is referred to as Crude Oil in Boundary Layer.Crude oil medium pitch, colloid, wax component are higher, and the oil well production time is longer, producing energy decline is faster, and the thickness of crude oil boundary film is more easily formed and increases.This Crude Oil in Boundary Layer seriously governs the flowing of reservoir crude oil, changes formation rock duct wettability, causes the decline of oil well output.
The medium-term and long-term employing local water of Bohai Sea self-operation oilfield maintenance process, production waste and filtering sea are as working fluid, all difference in various degree can be there is with oil-reservoir water in these water in water type, salinity, due to reservoir pressure exhaustion in operation, working fluid leakage invades reservoir, react with reservoir oil, gas, water, rock forming mineral etc., cause the injuries such as the migration of reservoir pore solid phase particle, emulsification of crude oil blocking, water lock, after having a strong impact on operation, oil well recovers.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of waterproof to injure preposition Working Fluids for Reservoir Protection.
Second object of the present invention is to provide the compound method that a kind of waterproof injures preposition Working Fluids for Reservoir Protection.
Technical scheme of the present invention is summarized as follows:
Waterproof injures preposition Working Fluids for Reservoir Protection; be made up of following component by mass percentage; the injury of workover fluid Scale inhibitors 0.3% ~ 0.5%, high-efficient penetrant 0.5% ~ 1.0%, waterproof treatment agent 0.5% ~ 1.0%, curing catalyst 1.0% ~ 1.5% and multifuctional cleaning agent 10% ~ 15%, all the other are water.
Waterproof injures the compound method of preposition Working Fluids for Reservoir Protection, comprise the steps: to after clean without greasy dirt, water is filled without in the Agitation Tank with whipping appts of iron rust and sand grain or suction pit, static 30min, the water of dosing pond volume 1/5 is equivalent to from dosing pond bottom discharge, open whipping appts, adding workover fluid Scale inhibitors makes mass concentration be 0.3% ~ 0.5%, high-efficient penetrant makes concentration be 0.5% ~ 1.0%, waterproof injury treatment agent makes mass concentration be 0.5% ~ 1.0%, curing catalyst make mass concentration be 1.0% ~ 1.5% and multifuctional cleaning agent make mass concentration be 10% ~ 15%, be uniformly mixed, obtain waterproof and injure preposition Working Fluids for Reservoir Protection.
Advantage of the present invention:
It is a kind of weak emulsion dispersion system that a kind of waterproof of the present invention injures preposition Working Fluids for Reservoir Protection, have that liquid under flow state is homogeneous, profit is slowly separated under stationary state characteristic, effectively can remove viscous crude and the organic deposition of well screen and the adhesion of nearly well reservoir, improve process zone permeability and porous rocks surface characteristic, remove reservoir pore space emulsification of crude oil and organic deposition blocking injury, eliminate and reduce the impact of later stage work liquid leakage on reservoir permeability; Working fluid does not affect later stage dehydrating of crude oil process.Be applicable to the cleaning of organic deposition and the pre-treatment job on porous rocks surface such as nearly well reservoir pore space wax, colloid, bituminous matter in heavy crude well, low temperature high waxy oil well operations process, there is higher crude oil washing/COW ability, effectively can improve reservoir permeability, reduce working fluid in operation and miss the reservoir damage caused, and row is returned on stratum after accelerating operation, shorten the oil well restore cycle.
Accompanying drawing explanation
Fig. 1 is produce oil change curve before and after LD5-2A25 well operations.
Fig. 2 is that SZ36-1E13 well uses produce oil change curve before and after working fluid of the present invention.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
Multifuctional cleaning agent BH-QXJ-02, CNOOC's energy development engineering sold;
High-efficient penetrant R-134, CNOOC's energy development engineering sold;
Waterproof injury treatment agent BHHZ-01, CNOOC's energy development engineering sold;
Curing catalyst BH-GC, CNOOC's energy development engineering sold;
Workover fluid scale inhibitor BHF-701, CNOOC's energy development engineering sold.
Embodiment 1
Waterproof injures preposition Working Fluids for Reservoir Protection, is made up of by mass percentage following component, and the injury of workover fluid Scale inhibitors 0.3%, high-efficient penetrant 1.0%, waterproof treatment agent 1.0%, curing catalyst 1.0% and multifuctional cleaning agent 15%, all the other are GEOTHERMAL WATER.
Waterproof injures preposition Working Fluids for Reservoir Protection compound method:
To after clean without greasy dirt, fill GEOTHERMAL WATER without iron rust and sand grain with in the Agitation Tank of whipping appts; static 30min; the water of dosing pond volume 1/5 is equivalent to from dosing pond bottom discharge; open whipping appts; add that workover fluid Scale inhibitors makes that mass concentration is 0.3%, high-efficient penetrant make that concentration is 1.0%, waterproof injury treatment agent makes that mass concentration is 1.0%, curing catalyst make mass concentration be 1.0% and multifuctional cleaning agent make mass concentration be 15%; stir and mix for 30 minutes, obtain waterproof and injure preposition Working Fluids for Reservoir Protection.
Result of use
5-2 oil field, Luda A25 well is a bite viscous crude recovery well, viscosity of crude (50 DEG C) 670.9mpas, formation temperature at 55 DEG C ~ 60 DEG C, oil well day produce oil 10.6m before operation
3, 10 days upper subjob decubations; This subjob uses the present embodiment waterproof to injure preposition Working Fluids for Reservoir Protection, and oil well liquid-producing recovers for 7 days, average daily oil volume increase 20.2m
3.Crude oil day volume increase 190% after operation.See Fig. 1.
Embodiment 2
Waterproof injures preposition Working Fluids for Reservoir Protection, is made up of by mass percentage following component, and the injury of workover fluid Scale inhibitors 0.5%, high-efficient penetrant 0.5%, waterproof treatment agent 0.5%, curing catalyst 1.5% and multifuctional cleaning agent 10%, all the other are GEOTHERMAL WATER.
Waterproof injures preposition Working Fluids for Reservoir Protection compound method:
To after clean without greasy dirt, fill GEOTHERMAL WATER without iron rust and sand grain with in the suction pit of whipping appts; static 30min; the water of dosing pond volume 1/5 is equivalent to from dosing pond bottom discharge; open whipping appts; add that workover fluid Scale inhibitors makes that mass concentration is 0.5%, high-efficient penetrant make that concentration is 0.5%, waterproof injury treatment agent makes that mass concentration is 0.5%, curing catalyst make mass concentration be 1.5% and multifuctional cleaning agent make mass concentration be 10%; stir and mix for 30 minutes, obtain waterproof and injure preposition Working Fluids for Reservoir Protection.
Result of use: SZ 36-1 Field E13 well is a bite viscous crude recovery well, viscosity of crude (50 DEG C) 1874mpas, formation temperature at 55 DEG C-60 DEG C, oil well day produce oil 64.8m before operation
3, use waterproof injure preposition Working Fluids for Reservoir Protection and Solid Free temporarily stifled liquid carry out the operation of inspection pump oil layer protection, after operation, pumping rate is by 100m
3/ d carries to 150m
3/ d, pump frequency 50hz produce, and oil well liquid-producing recovers for 4 days, day produce oil 82.4m
3, oil well day produce oil increase by 27%.See Fig. 2.
Embodiment 3
Waterproof injures preposition Working Fluids for Reservoir Protection, is made up of by mass percentage following component, and the injury of workover fluid Scale inhibitors 0.3%, high-efficient penetrant 1.0%, waterproof treatment agent 0.5%, curing catalyst 1.0% and multifuctional cleaning agent 10%, all the other are GEOTHERMAL WATER.
Waterproof injures preposition Working Fluids for Reservoir Protection compound method:
To after clean without greasy dirt, fill GEOTHERMAL WATER without iron rust and sand grain with in the suction pit of whipping appts; static 30min; the water of dosing pond volume 1/5 is equivalent to from dosing pond bottom discharge; open whipping appts; add that workover fluid Scale inhibitors makes that mass concentration is 0.3%, high-efficient penetrant make that concentration is 1.0%, waterproof injury treatment agent makes that mass concentration is 0.5%, curing catalyst make mass concentration be 1.0% and multifuctional cleaning agent make mass concentration be 10%; stir and mix for 30 minutes, obtain waterproof and injure preposition Working Fluids for Reservoir Protection.
Result of use: the Bohai Sea used waterproof to injure preposition Working Fluids for Reservoir Protection and Solid Free stifled liquid operation 20 well temporarily in oil field on one's own account in 2009, and 7.9 days average restore cycles of oil well, comparatively 19 days average restore cycles of operation last time shorten 11.3 days.Waterproof within 2010, is used to injure preposition Working Fluids for Reservoir Protection and Solid Free stifled liquid operation 48 well temporarily; normal recovery well time 42 wells, job success ratio 82.5%, 6.3 days average decubations of oil well; unchanged 10 wells of production status before and after operation, on average increase day by day oily 7.39m
3/ d.
Claims (2)
1. waterproof injures preposition Working Fluids for Reservoir Protection; it is characterized in that being made up of following component by mass percentage; the injury of workover fluid Scale inhibitors 0.3% ~ 0.5%, high-efficient penetrant 0.5% ~ 1.0%, waterproof treatment agent 0.5% ~ 1.0%, curing catalyst 1.0% ~ 1.5% and multifuctional cleaning agent 10% ~ 15%, all the other are water.
2. the waterproof of claim 1 injures the compound method of preposition Working Fluids for Reservoir Protection, it is characterized in that comprising the steps: to after clean without greasy dirt, water is filled without in the Agitation Tank with whipping appts of iron rust and sand grain or suction pit, static 30min, the water of dosing pond volume 1/5 is equivalent to from dosing pond bottom discharge, open whipping appts, adding workover fluid Scale inhibitors makes mass concentration be 0.3% ~ 0.5%, high-efficient penetrant makes concentration be 0.5% ~ 1.0%, waterproof injury treatment agent makes mass concentration be 0.5% ~ 1.0%, curing catalyst make mass concentration be 1.0% ~ 1.5% and multifuctional cleaning agent make mass concentration be 10% ~ 15%, be uniformly mixed, obtain waterproof and injure preposition Working Fluids for Reservoir Protection.
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| CN201410690698.4A CN104479661A (en) | 2014-11-25 | 2014-11-25 | Waterproof injury front reservoir protection operating fluid and preparation method |
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| CN201410690698.4A CN104479661A (en) | 2014-11-25 | 2014-11-25 | Waterproof injury front reservoir protection operating fluid and preparation method |
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Citations (6)
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| CN102634332A (en) * | 2012-03-26 | 2012-08-15 | 中国石油天然气股份有限公司 | Blocking remover for pressure-reducing steam injection of high-clay-content sandstone oil reservoir |
| CN102827594A (en) * | 2012-09-20 | 2012-12-19 | 中国海洋石油总公司 | Heavy oil dirt cleaning agent |
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| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
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| CN103627377A (en) * | 2012-08-23 | 2014-03-12 | 中国石油天然气股份有限公司 | Oil layer protecting liquid |
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2014
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Patent Citations (6)
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| CN102634332A (en) * | 2012-03-26 | 2012-08-15 | 中国石油天然气股份有限公司 | Blocking remover for pressure-reducing steam injection of high-clay-content sandstone oil reservoir |
| CN103627377A (en) * | 2012-08-23 | 2014-03-12 | 中国石油天然气股份有限公司 | Oil layer protecting liquid |
| CN102827594A (en) * | 2012-09-20 | 2012-12-19 | 中国海洋石油总公司 | Heavy oil dirt cleaning agent |
| CN103305202A (en) * | 2013-06-09 | 2013-09-18 | 中国海洋石油总公司 | Multifunctional reverse wetting agent and preparation method thereof |
| CN103343675A (en) * | 2013-07-18 | 2013-10-09 | 中国海洋石油总公司 | Compound plug removal technological method for offshore oil field injection well |
| CN103602326A (en) * | 2013-10-14 | 2014-02-26 | 中国石油天然气股份有限公司 | Novel efficient well flushing fluid with oil layer protection effect, and preparation method and application thereof |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Tao Inventor after: Long Jiangqiao Inventor after: Fan Hong Inventor after: Xing Sijun Inventor after: Wang Zhongguang Inventor after: Zhou Wenyuan Inventor after: Ren Qiang Inventor after: Liang Xiaolei Inventor after: Wang Chen Inventor before: Wang Tao Inventor before: Long Jiangqiao Inventor before: Fan Hong Inventor before: Xing Sijun Inventor before: Wang Zhongguang Inventor before: Zhou Wenyuan Inventor before: Ren Qiang Inventor before: Liang Xiaolei Inventor before: Wang Chen |
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| COR | Change of bibliographic data | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170117 Address after: 100027 Beijing city Dongcheng District Dongzhimen Street No. 6 Applicant after: CNOOC Energy Technology Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Technology Co., Ltd. |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150401 |