CN102876304A - Bottom water plugging agent system and process for horizontal well - Google Patents
Bottom water plugging agent system and process for horizontal well Download PDFInfo
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- CN102876304A CN102876304A CN2012103479339A CN201210347933A CN102876304A CN 102876304 A CN102876304 A CN 102876304A CN 2012103479339 A CN2012103479339 A CN 2012103479339A CN 201210347933 A CN201210347933 A CN 201210347933A CN 102876304 A CN102876304 A CN 102876304A
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Abstract
The invention discloses a bottom water plugging agent system and process for a horizontal well. The bottom water plugging agent system for the conventional horizontal well is characterized by comprising an inorganic precipitation type system and a polysilicon system or polymer gel system.The bottom water plugging agent system for the thermal-recovery horizontal well is characterized by comprising an inorganic precipitation type system and a N2 foam system or temperature-sensitive gel system. The bottom water plugging agent process for the horizontal well comprise the following steps: (1) injecting an annular chemical plugging device by using a mechanical packer plugging device on the basis of clarifying a water outlet point so as to ensure the selectivity of the injection; (2) selecting the bottom water plugging agent system according to the temperature, the heterogeneity and other parameters of the oil reservoir at the horizontal well; and (3) injecting the bottom water plugging agent system. The bottom water plugging agent system is selected reasonably and combined properly. The technology of the bottom water plugging agent process can be applied to the horizontal well with high or ultrahigh water content to achieve the purpose of deeply plugging more than 90% of bottom water at high strength, so that the water content of the horizontal well is reduced effectively, and the productivity of the oil well is improved.
Description
Technical field
The present invention relates to a kind of horizontal well bottom water plugging blocking agent system and bottom water plugging technique.
Background technology
Horizontal well has increased the length of well in payzone and the drainage area of payzone, can develop oil reservoir under low voltage difference, improves reservoir, crack brill encountering rate, effectively solves the variety of issue that faces in the oilfield exploitation procedure.At present, the most domestic horizontal well has entered high water-cut development period, and is different from conventional straight well, is limited by the reasons such as exceptional well body structure, completion mode, water outlet type of horizontal well, also lacks mature technology in the water blockoff work of horizontal well both at home and abroad.
Summary of the invention
Technical problem to be solved by this invention provides a kind of horizontal well bottom water plugging blocking agent system and bottom water plugging technique, is used for the high moisture or super-high water-cut stage that oil field routine or horizontal well thermal recovery recover the oil.
Technical problem to be solved by this invention is achieved through the following technical solutions:
A kind of horizontal well bottom water plugging blocking agent system, described horizontal well comprises conventional levels well and horizontal well thermal recovery, it is characterized in that: described blocking agent system comprises inorganic precipitation type system, poly-silicon system, polymer gel system, N2 foam system and thermo-sensitive gel system.Wherein in conventional oil reservoir, arrange the well section that comprises horizontal direction in the wellbore trajectory, be called the conventional levels well by increasing the oil reservoir drainage area with this class well that improves oil well output; Arranged the well section that comprises horizontal direction in the wellbore trajectory in Heavy Oil Reservoir, improved reservoir temperature by steam treatment, the inner viscosity of crude of reduction oil reservoir is called horizontal well thermal recovery with this class well of effective heavy crude producing.
For the conventional levels well, according to reservoir temperature, described bottom seal blocking agent system is by inorganic precipitation type system and poly-silicon system or inorganic precipitation type system and polymer gel composing system; For horizontal well thermal recovery, to select according to temperature in the stratum behind steam flood or the steam stimulation, described bottom seal blocking agent system is by inorganic precipitation type system and N
2Foam system or inorganic precipitation type system and thermo-sensitive gel composing system;
For the conventional levels well, minute two slugs inject, and the volume ratio of described inorganic precipitation type system and poly-silicon system or polymer gel system is 1: 3-3: 1; For horizontal well thermal recovery, minute two slugs inject, described inorganic precipitation type system and N
2The volume ratio of foam system or thermo-sensitive gel system is 1: 3-3: 1.
Described inorganic precipitation type system is the water glass solution of concentration 5-35wt%; Described poly-silicon system is the poly-polymeric silicon material solution of concentration 1-5wt%, and poly-polymeric silicon material is poly-methyl silicate preferably;
Described polymer gel system is the polyacrylamide solution of 0.15wt%-1.00wt%;
Described N
2Foam system is whipping agent, N
2System with vapor composition; N wherein
2Companion's steam treatment, N
2Slug and whipping agent slug volume ratio are 2: 1-1: 3, and preferred slug volume ratio is 1: 1; Described whipping agent is anionic, cationic, amphoteric or nonionic foaming agent, preferably adopts the anionic whipping agent; Density of foaming agent is 0.1-1.0wt%, and preferred concentration is 0.5wt%;
Described thermo-sensitive gel system is 0.5-15wt% ether of cellulose solution.
Described ether of cellulose is hydroxypropylcelluloether ether or methylethyl cellulose ether; Described whipping agent is the unsaturated hydrocarbons type of sulfonate type, carboxylic acid type or C2-C4; Unsaturated hydrocarbons optimal ethylene, propylene; Perfluoro alkyl sulfonic acid sodium or the sodium alkyl benzene sulfonate of the preferred sodium laurylsulfonate of sulfonate type, C5-C10; The preferred DGE carboxylate salt of carboxylic acid type, alcohol ether carboxylate or polyoxyethylene groups carboxylic acid sodium.
Described N
2Companion's steam treatment adopts alternately injection or ground to mix rear the injection with whipping agent.
Described horizontal well bottom water plugging technique may further comprise the steps:
(1) on the basis of clear and definite water exit, after use mechanical packer card is enclosed in the water exit two ends, injects annular chemical packer, with the selectivity that guarantees to inject;
(2) select the blocking agent system according to the temperature of horizontal well oil reservoir of living in: for the described bottom seal blocking agent of conventional levels well system by inorganic precipitation type system and poly-silicon system or polymer gel composing system, select according to reservoir temperature, reservoir temperature is selected poly-silicon system greater than 80 ℃;
For horizontal well thermal recovery, described bottom seal blocking agent is by inorganic precipitation type system and N
2Foam system or thermo-sensitive gel composing system are selected according to temperature in the stratum behind steam flood or the steam stimulation, and this temperature is selected the thermo-sensitive gel system less than 150 ℃;
(3) injection of blocking agent system: for the conventional levels well, adopt ram pump to divide 2 slugs to inject, according to volume ratio, described the first slug is inorganic precipitation type system, the poly-silicon system of the second slug or polymer gel system, and two slug volumes are 1: 3-3: 1; First inorganic precipitation type system is injected into well, re-use that ram pump will gather the silicon system or polymer gel system system injects into well, replace an amount of oil-field water, closing well becomes glue; An amount of oil-field water is determined according to the depth calculation of wellbore volume and the oil reservoir of need entering;
For horizontal well thermal recovery, adopt ram pump to divide 2 slugs to inject, described the first slug is inorganic precipitation type system, the second slug is N
2Foam system or thermo-sensitive gel system, slug volume ratio are 1: 3-3: 1; Use ram pump first inorganic precipitation type system to be injected into well, again with thermo-sensitive gel system or N
2Foam system injects into well, and replaces an amount of oil-field water, and closing well becomes glue.
The preparation method of described inorganic precipitation type system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get inorganic precipitation type system, this system concentration that is mixed with is 5-35wt%.
The preparation method of described poly-silicon system or polymer gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that poly-silicon system or polymer gel system stir out in (1) slowly pours into;
(3) stir until be uniformly dispersed, must gather silicon system or polymer gel system, the poly-silicon system concentration that is mixed with is 1-5wt%, and the polymer gel system is 0.15-1.00wt%.
The preparation method of described thermo-sensitive gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that the thermo-sensitive gel system stirs out in (1) slowly pours into;
(3) stir until be uniformly dispersed, get the thermo-sensitive gel system, this system concentration that is mixed with is 0.5-15wt%.
Described N
2The preparation method of foam system may further comprise the steps:
(1) preparation foaming agent solution, concentration is 0.1-1.0wt%;
(2) discharge capacity and the flow process pipeline of adjustment steam, nitrogen, whipping agent;
(3) use the ram pump of high-duty boiler equipment, nitrogen car and low dose with deployed N
2Foam system injects into well.
Described steam injection speed 120-200t/d, N
2Injection speed 900-1200Nm
3/ hr, whipping agent injection speed 0.5-2.5L/min.
Of the present invention have a following beneficial effect:
Blocking agent system of the present invention is selected rationally, combination is proper, the property annotated is strong, had " advance go, stifled live, the resistance to erosion ability is strong, shutoff validity period length " features of water plugging.After this Technology is applied to high moisture or ultra-high water-containing horizontal well, can reach the purpose of high strength indepth plugging, sealing ratiod effectively reduces horizontal well moisture percentage more than 90%, improves oil well productivity.
Description of drawings
Fig. 1 is horizontal well bottom water plugging Technology synoptic diagram
Fig. 2 is horizontal well bottom water plugging technique site operation schematic flow sheet
Fig. 3 is horizontal well bottom water plugging technique N
2Foam site operation schematic flow sheet
Among the figure, 1. water exit, 2. annular chemical packer, 3. mechanical packer, 4. leakage opening, 5. the second slug, 6. the first slug, 7. horizontal well, 8. inorganic precipitation type system agitated pool, 9. poly-silicon system or polymer gel system agitated pool, 11. nitrogen cars, 12. high-duty boiler equipment, the ram pump of 13. low doses, 14. ram pumps, 21. water layers, 22. oil reservoirs, 23. sand control screens, 24. injection tubes
Embodiment
As Figure 1-3, a kind of horizontal well bottom water plugging blocking agent system, described horizontal well comprises conventional levels well and horizontal well thermal recovery, it is characterized in that: described blocking agent system comprises inorganic precipitation type system, poly-silicon system, polymer gel system, N2 foam system and thermo-sensitive gel system.
For the conventional levels well, according to reservoir temperature, described bottom seal blocking agent system is by inorganic precipitation type system and poly-silicon system or inorganic precipitation type system and polymer gel composing system; For horizontal well thermal recovery, to select according to temperature in the stratum behind steam flood or the steam stimulation, described bottom seal blocking agent system is by inorganic precipitation type system and N
2Foam system or inorganic precipitation type system and thermo-sensitive gel composing system;
For the conventional levels well, minute two slugs inject, and the volume ratio of described inorganic precipitation type system and poly-silicon system or polymer gel system is 1: 3-3: 1; For horizontal well thermal recovery, minute two slugs inject, described inorganic precipitation type system and N
2The volume ratio of foam system or thermo-sensitive gel system is 1: 3-3: 1.
Described inorganic precipitation type system is the water glass solution of concentration 5-35wt%; Described poly-silicon system is the poly-polymeric silicon material solution of concentration 1-5wt%, and poly-polymeric silicon material is poly-methyl silicate preferably;
Described polymer gel system is the polyacrylamide solution of 0.15wt%-1.00wt%;
Described N
2Foam system is whipping agent, N
2System with vapor composition; N wherein
2Companion's steam treatment, N
2Slug and whipping agent slug volume ratio are 2: 1-1: 3, and preferred slug volume ratio is 1: 1; Described whipping agent is anionic, cationic, amphoteric or nonionic foaming agent, preferably adopts the anionic whipping agent; Density of foaming agent is 0.1-1.0wt%, and preferred concentration is 0.5wt%;
Described thermo-sensitive gel system is 0.5-15wt% ether of cellulose solution.
Described ether of cellulose is hydroxypropylcelluloether ether or methylethyl cellulose ether; Described whipping agent is the unsaturated hydrocarbons type of sulfonate type, carboxylic acid type or C2-C4; Unsaturated hydrocarbons optimal ethylene, propylene; Perfluoro alkyl sulfonic acid sodium or the sodium alkyl benzene sulfonate of the preferred sodium laurylsulfonate of sulfonate type, C5-C10; The preferred DGE carboxylate salt of carboxylic acid type, alcohol ether carboxylate or polyoxyethylene groups carboxylic acid sodium.
Described N
2Companion's steam treatment adopts alternately injection or ground to mix rear the injection with whipping agent.
Described horizontal well bottom water plugging technique may further comprise the steps:
(1) on the basis of clear and definite water exit, after use mechanical packer card is enclosed in the water exit two ends, injects annular chemical packer, with the selectivity that guarantees to inject;
(2) select the blocking agent system according to the temperature of horizontal well oil reservoir of living in: for the described bottom seal blocking agent of conventional levels well system by inorganic precipitation type system and poly-silicon system or polymer gel composing system, select according to reservoir temperature, reservoir temperature is selected poly-silicon system greater than 80 ℃;
For horizontal well thermal recovery, described bottom seal blocking agent is by inorganic precipitation type system and N
2Foam system or thermo-sensitive gel composing system are selected according to temperature in the stratum behind steam flood or the steam stimulation, and this temperature is selected the thermo-sensitive gel system less than 150 ℃;
(3) injection of blocking agent system: for the conventional levels well, adopt ram pump to divide 2 slugs to inject, according to volume ratio, described the first slug is inorganic precipitation type system, the poly-silicon system of the second slug or polymer gel system, and two slug volumes are 1: 3-3: 1; First inorganic precipitation type system is injected into well, re-use that ram pump will gather the silicon system or polymer gel system system injects into well, replace an amount of oil-field water, closing well becomes glue; An amount of oil-field water is determined according to the depth calculation of wellbore volume and the oil reservoir of need entering;
For horizontal well thermal recovery, adopt ram pump to divide two slugs to inject, described the first slug is inorganic precipitation type system, the second slug is N
2Foam system or thermo-sensitive gel system, slug volume ratio are 1: 3-3: 1; Use ram pump first inorganic precipitation type system to be injected into well, again with thermo-sensitive gel system or N
2Foam system injects into well, and replaces an amount of oil-field water, and closing well becomes glue.
The preparation method of described inorganic precipitation type system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get inorganic precipitation type system, this system concentration that is mixed with is 5-35wt%.
The preparation method of described poly-silicon system or polymer gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that poly-silicon system or polymer gel system stir out in (1) slowly pours into;
(3) stir until be uniformly dispersed, must gather silicon system or polymer gel system, the poly-silicon system concentration that is mixed with is 1-5wt%, and the polymer gel system is 0.15-1.00wt%.
The preparation method of described thermo-sensitive gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that the thermo-sensitive gel system stirs out in (1) slowly pours into;
(3) stir until be uniformly dispersed, get the thermo-sensitive gel system, this system concentration that is mixed with is 0.5-15wt%.
Described N
2The preparation method of foam system may further comprise the steps:
(1) preparation foaming agent solution, concentration is 0.1-1.0wt%;
(2) discharge capacity and the flow process pipeline of adjustment steam, nitrogen, whipping agent;
(3) use the ram pump of high-duty boiler equipment, nitrogen car and low dose with deployed N
2Foam system injects into well.
Described steam injection speed 120-200t/d, N
2Injection speed 900-1200Nm
3/ hr, whipping agent injection speed 0.5-2.5L/min.
As shown in Figure 1 be horizontal well bottom water plugging technique, choose the blocking agent system and inject according to 2 slugs, blocking agent is advanced from injection tube, flow out from leakage opening, with the blocking agent slug below water exit; The water exit both sides arrange annular chemical packer and mechanical packer.
Embodiment 1: the conventional levels shaft bottom water seal deblocking technology of inorganic precipitation type system and polymer gel system
A kind of horizontal well bottom water plugging Technology mainly comprises 2 slugs, and the first slug is that inorganic precipitation type system and the second slug are that polymer gel system volume ratio is 1: 3.
Above-mentioned horizontal well bottom water plugging Technology may further comprise the steps:
(1) put into first a certain amount of oilfield injection water in inorganic precipitation type system agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that a certain amount of inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get 5-35wt% inorganic precipitation type system;
(4) in another one polymer gel system agitated pool, put into a certain amount of oilfield injection water, open agitator in the pond, in the high-speed stirring situation, add a certain amount of polymer gel system, until dispersed with stirring is even, get 0.15wt%-1.00wt% polymer gel system;
(5) use ram pump first the solution in (3) to be injected into well, re-use ram pump with in the uniform system injected water of the dispersed with stirring horizontal well in (4), replace an amount of oil-field water, closing well becomes glue.
Inorganic precipitation type system concentration is 35wt% in the described horizontal well bottom water plugging Technology.
Polymer gel system concentration is 1.00wt% in the described horizontal well bottom water plugging Technology.
Above-mentioned horizontal well bottom water plugging Technology, described horizontal well bottom water plugging technique is applicable to conventional reservoir temperature less than the high moisture or super-high water-cut stage of 80 ℃ horizontal well production.
Embodiment 2: the conventional levels shaft bottom water seal deblocking technology of inorganic precipitation type system and poly-silicon system
A kind of horizontal well bottom water plugging Technology mainly comprises 2 slugs, and the poly-silicon system volume ratio of the first slug inorganic precipitation type system and the second slug is 2: 1.
Above-mentioned horizontal well bottom water plugging Technology may further comprise the steps:
(1) put into first a certain amount of oilfield injection water in inorganic precipitation type system agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that a certain amount of inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get 5-35wt% inorganic precipitation type system;
(4) in the poly-silicon system agitated pool of another one, put into a certain amount of oilfield injection water, open agitator in the pond, in the high-speed stirring situation, add a certain amount of poly-silicon system, until dispersed with stirring is even, get the poly-silicon system of 1-5wt%;
(5) use ram pump first with in the solution Injection Well 7 in (3), re-use ram pump with in the uniform system injected water of the dispersed with stirring horizontal well in (4), replace an amount of oil-field water, closing well becomes glue.
Inorganic precipitation type system concentration is 25wt% in the described horizontal well bottom water plugging Technology.
Poly-silicon system concentration is 5wt% in the described horizontal well bottom water plugging Technology.
Described horizontal well bottom water plugging technique is applicable to the high moisture or super-high water-cut stage of the horizontal well production of conventional reservoir temperature more than 80 ℃.
Embodiment 3: the horizontal well thermal recovery bottom water plugging technique of inorganic precipitation type system and thermo-sensitive gel system
A kind of horizontal well thermal recovery bottom water plugging Technology mainly comprises 2 slugs, and the first slug inorganic precipitation type system and the second slug thermo-sensitive gel system volume ratio are 3: 1.
Above-mentioned horizontal well bottom water plugging Technology may further comprise the steps:
(1) put into first a certain amount of oilfield injection water in inorganic precipitation type system agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that a certain amount of inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get 5-35wt% inorganic precipitation type system;
(4) in the another one agitated pool, put into a certain amount of oilfield injection water, open agitator in the pond, in the high-speed stirring situation, add a certain amount of thermo-sensitive gel system, until dispersed with stirring is even, get 0.5-15wt% thermo-sensitive gel system;
(5) use ram pump first with in the solution injected water horizontal well in (3), re-use ram pump with in the uniform system injected water of the dispersed with stirring horizontal well in (4), replace an amount of oil-field water, closing well becomes glue.
Inorganic precipitation type system concentration is 15wt% in the described horizontal well bottom water plugging Technology.
Thermo-sensitive gel system concentration is 10wt% in the described horizontal well bottom water plugging Technology.
Described horizontal well bottom water plugging technique is applicable to the high moisture or super-high water-cut stage that horizontal well thermal recovery recovers the oil, and selects according to temperature in the stratum behind steam flood or the steam stimulation, and this temperature is selected the thermo-sensitive gel system less than 150 ℃, is used for the thick oil thermal extraction shutoff.
Embodiment 4: inorganic precipitation type system and N
2Foam system horizontal well thermal recovery bottom water plugging technique
A kind of horizontal well bottom water plugging Technology mainly comprises 2 slugs, and the first slug is that inorganic precipitation type system and the second slug are N
2The foam system volume ratio is 2: 1.
Above-mentioned horizontal well bottom water plugging Technology may further comprise the steps:
(1) put into first a certain amount of oilfield injection water in inorganic precipitation type system agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that a certain amount of inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get 5-35wt% inorganic precipitation type system;
(4) preparation foaming agent solution, concentration is 0.1-1.0wt%; Then to N
2Foam system injects, and adjusts plunger pump duty and the flow process pipeline of the low dose of high-duty boiler equipment, nitrogen car, whipping agent by Fig. 3;
(5) use ram pump first with in the solution injected water horizontal well in (3), re-use the ram pump of nitrogen car, high-duty boiler equipment, low dose with deployed N in (4)
2In the foam system injected water horizontal well, replace an amount of oil-field water, closing well becomes glue.
Inorganic precipitation type system concentration is 200000mg/L in the described horizontal well bottom water plugging Technology.
N in the described horizontal well bottom water plugging Technology
2Foam system steam injection speed 120～200t/d, N
2Injection speed 900～1200Nm
3/ h, whipping agent injection speed 0.5～2.5L/min.
Described horizontal well bottom water plugging technique is applicable to the high moisture or super-high water-cut stage that horizontal well thermal recovery recovers the oil, and selects according to temperature in the stratum behind steam flood or the steam stimulation, and this temperature is higher than 150 ℃, selects N
2Foam system; Be used for common heavy oil or conventional ligh-oil reservoir shutoff.
Claims (10)
1. horizontal well bottom water plugging blocking agent system, described horizontal well comprises conventional levels well and horizontal well thermal recovery, it is characterized in that: described blocking agent system comprises inorganic precipitation type system, poly-silicon system, polymer gel system, N
2Foam system and thermo-sensitive gel system;
For the conventional levels well, according to reservoir temperature, described bottom seal blocking agent system is by inorganic precipitation type system and poly-silicon system or inorganic precipitation type system and polymer gel composing system; For horizontal well thermal recovery, according to temperature in the stratum behind steam flood or the steam stimulation, described bottom seal blocking agent system is by inorganic precipitation type system and N
2Foam system or inorganic precipitation type system and thermo-sensitive gel composing system;
For the conventional levels well, minute two slugs inject, and the volume ratio of described inorganic precipitation type system and poly-silicon system or polymer gel system is 1: 3-3: 1; For horizontal well thermal recovery, minute two slugs inject, described inorganic precipitation type system and N
2The volume ratio of foam system or thermo-sensitive gel system is 1: 3-3: 1.
2. horizontal well bottom water plugging blocking agent system as claimed in claim 1, it is characterized in that: described inorganic precipitation type system is the water glass solution of concentration 5-35wt%; Described poly-silicon system is the poly-polymeric silicon material solution of concentration 1-5wt%, and poly-polymeric silicon material is poly-methyl silicate preferably;
Described polymer gel system is the polyacrylamide solution of 0.15wt%-1.00wt%;
Described N
2Foam system is whipping agent, N
2System with vapor composition; N wherein
2Companion's steam treatment, N
2Slug and whipping agent slug volume ratio are 2: 1-1: 3, and preferred slug volume ratio is 1: 1; Described whipping agent is anionic, cationic, amphoteric or nonionic foaming agent, preferably adopts the anionic whipping agent; Whipping agent is mixed with the solution that concentration is 0.1-1.0wt%, and preferred concentration is 0.5wt%;
Described thermo-sensitive gel system is 0.5-15wt% ether of cellulose solution.
3. horizontal well bottom water plugging blocking agent system as claimed in claim 2, it is characterized in that: described ether of cellulose is hydroxypropylcelluloether ether or methylethyl cellulose ether; Described whipping agent is the unsaturated hydrocarbons type of sulfonate type, carboxylic acid type or C2C4; Unsaturated hydrocarbons optimal ethylene, propylene; Perfluoro alkyl sulfonic acid sodium or the sodium alkyl benzene sulfonate of the preferred sodium laurylsulfonate of sulfonate type, C5-C10; The preferred DGE carboxylate salt of carboxylic acid type, alcohol ether carboxylate or polyoxyethylene groups carboxylic acid sodium.
4. horizontal well bottom water plugging blocking agent system as claimed in claim 2 is characterized in that: described N
2Companion's steam treatment adopts alternately injection or ground to mix rear the injection with whipping agent; Described steam injection speed 120-200t/d, N
2Injection speed 900-1200Nm
3/ hr, whipping agent injection speed 0.5-2.5L/min.
5. one kind such as the described horizontal well bottom water plugging of one of claim 1-4 technique, may further comprise the steps:
(1) on the basis of clear and definite water exit, after use mechanical packer card is enclosed in the water exit two ends, injects annular chemical packer, with the selectivity that guarantees to inject;
(2) select the blocking agent system according to the temperature of horizontal well oil reservoir of living in: for the described bottom seal blocking agent of conventional levels well system by inorganic precipitation type system and poly-silicon system or polymer gel composing system, select according to reservoir temperature, reservoir temperature is selected poly-silicon system greater than 80 ℃;
For horizontal well thermal recovery, described bottom seal blocking agent is by inorganic precipitation type system and N
2Foam system or thermo-sensitive gel composing system are selected according to temperature in the stratum behind steam flood or the steam stimulation, and this temperature is selected the thermo-sensitive gel system less than 150 ℃;
(3) injection of blocking agent system: for the conventional levels well, adopt ram pump to divide 2 slugs to inject, according to volume ratio, described the first slug is inorganic precipitation type system, the poly-silicon system of the second slug or polymer gel system, and two slug volumes are 1: 3-3: 1; First inorganic precipitation type system is injected into well, re-use that ram pump will gather the silicon system or polymer gel system system injects into well, replace an amount of oil-field water, closing well becomes glue;
For horizontal well thermal recovery, adopt ram pump to divide 2 slugs to inject, described the first slug is inorganic precipitation type system, the second slug is N
2Foam system or thermo-sensitive gel system, slug volume ratio are 1: 3-3: 1; Use ram pump first inorganic precipitation type system to be injected into well, again with thermo-sensitive gel system or N
2Foam system injects into well, and replaces an amount of oil-field water, and closing well becomes glue.
6. horizontal well bottom water plugging technique as claimed in claim 5, the preparation method of described inorganic precipitation type system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 100-200rpm;
(2) adding the whirlpool that inorganic precipitation type system stirs out in (1) slowly pours into;
(3) behind the stirring 30min stirring velocity is dropped to 50-80rpm, continue to stop to stir behind the stirring 50min, get inorganic precipitation type system, this system concentration that is mixed with is 5-35wt%.
7. horizontal well bottom water plugging technique as claimed in claim 5, the preparation method of described poly-silicon system or polymer gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that poly-silicon system or polymer gel system stir out in (1) slowly pours into;
(3) stir until be uniformly dispersed, must gather silicon system or polymer gel system, the poly-silicon system concentration that is mixed with is 1-5wt%, and the polymer gel system is 0.15-1.00wt%.
8. horizontal well bottom water plugging technique as claimed in claim 5, the preparation method of described thermo-sensitive gel system may further comprise the steps:
(1) put into first oilfield injection water in agitated pool, open agitator in the pond, stirring velocity is 1000-2000rpm;
(2) adding the whirlpool that the thermo-sensitive gel system stirs out in (1) slowly pours into;
(3) stir until be uniformly dispersed, get the thermo-sensitive gel system, this system concentration that is mixed with is 0.5-15wt%.
9. horizontal well bottom water plugging technique as claimed in claim 3, described N
2The preparation method of foam system may further comprise the steps:
(1) preparation foaming agent solution, concentration is 0.1-1.0wt%;
(2) discharge capacity and the flow process pipeline of adjustment steam, nitrogen, whipping agent;
(3) use the ram pump of high-duty boiler equipment, nitrogen car and low dose with deployed N
2Foam system injects into well.
10. horizontal well bottom water plugging technique as claimed in claim 9, described steam injection speed 120-200t/d, N
2Injection speed 900-1200Nm
3/ hr, whipping agent injection speed 0.5-2.5L/min.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510152706.4A CN104745158A (en) | 2012-09-18 | 2012-09-18 | Bottom water plugging agent system and bottom water plugging technology for horizontal well |
| CN201210347933.9A CN102876304B (en) | 2012-09-18 | 2012-09-18 | Bottom water plugging agent system and process for horizontal well |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103114823A (en) * | 2013-01-31 | 2013-05-22 | 河海大学 | Device and method utilizing icebound embolisms to plug drill hole in subsection mode |
| CN103627376A (en) * | 2013-12-26 | 2014-03-12 | 中国石油天然气股份有限公司冀东油田分公司钻采工艺研究院 | Water glass inorganic gel plugging agent as well as preparation and using methods thereof |
| CN103711452A (en) * | 2013-12-31 | 2014-04-09 | 西南石油大学 | Gel plug packing well control method |
| CN104277802A (en) * | 2013-07-03 | 2015-01-14 | 中国石油化工股份有限公司 | High temperature resistant compound gel sealing channeling agent and preparation method thereof |
| CN104694093A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | High-temperature fluid slug glue solution for sealing oil gas and application thereof |
| CN104726080A (en) * | 2015-03-14 | 2015-06-24 | 肖传敏 | Profile control agent for thickening water well thin oil and preparation method thereof |
| CN105754565A (en) * | 2016-03-23 | 2016-07-13 | 重庆科技学院 | Organic microsphere and inorganic silicate compounded type channeling sealing agent for thermal extraction of heavy oil and preparation method of channeling sealing agent |
| CN105781512A (en) * | 2016-04-19 | 2016-07-20 | 中国石油大学(华东) | Method for restraining huff and puff gas channeling of composite hot fluid by aid of foam-assisted temperature-sensitive phase change systems |
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN106401540A (en) * | 2015-07-21 | 2017-02-15 | 思达斯易能源技术(集团)有限公司 | Segmented oil-stabilizing water-controlling method and device |
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN107542423A (en) * | 2016-06-24 | 2018-01-05 | 中石化石油工程技术服务有限公司 | A kind of sieve tube completion horizontal well expansion sleeve pipe shutoff method |
| CN108048056A (en) * | 2017-11-23 | 2018-05-18 | 中国石油天然气股份有限公司 | Channeling sealing system and preparation method and application thereof |
| CN108625818A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of sieve tube completion horizontal well thermal production chemical packer and application method |
| CN109899025A (en) * | 2019-01-24 | 2019-06-18 | 西南石油大学 | The channeling countermeasure system and application method of offshore oilfield steam soak |
| CN110862809A (en) * | 2019-12-03 | 2020-03-06 | 中国石油化工股份有限公司 | Solid foam profile control composition, solid foam profile control slurry, preparation method of solid foam profile control slurry and profile control method |
| CN111454703A (en) * | 2020-04-08 | 2020-07-28 | 宁夏朔光石油科技有限公司 | Formula and using method of composite temporary plugging agent for temporary plugging acidification of horizontal well |
| CN114961639A (en) * | 2022-07-28 | 2022-08-30 | 新疆新易通石油科技有限公司 | Steam flooding blocking and dredging combined development method for heavy oil reservoir |
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| CN107989600B (en) * | 2017-12-13 | 2023-09-12 | 捷贝通石油技术集团股份有限公司 | Water-based trace chemical tracer and method for measuring connectivity between water injection wells |
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| CN103114823A (en) * | 2013-01-31 | 2013-05-22 | 河海大学 | Device and method utilizing icebound embolisms to plug drill hole in subsection mode |
| CN103114823B (en) * | 2013-01-31 | 2015-07-29 | 河海大学 | A kind of device and method utilizing ice-bound embolism segmentation shutoff to hole |
| CN104277802A (en) * | 2013-07-03 | 2015-01-14 | 中国石油化工股份有限公司 | High temperature resistant compound gel sealing channeling agent and preparation method thereof |
| CN104694093A (en) * | 2013-12-06 | 2015-06-10 | 中国石油天然气股份有限公司 | High-temperature fluid slug glue solution for sealing oil gas and application thereof |
| CN103627376A (en) * | 2013-12-26 | 2014-03-12 | 中国石油天然气股份有限公司冀东油田分公司钻采工艺研究院 | Water glass inorganic gel plugging agent as well as preparation and using methods thereof |
| CN103627376B (en) * | 2013-12-26 | 2016-05-25 | 中国石油天然气股份有限公司冀东油田分公司钻采工艺研究院 | Waterglass inorganic gel plugging agent and preparation and application thereof |
| CN103711452A (en) * | 2013-12-31 | 2014-04-09 | 西南石油大学 | Gel plug packing well control method |
| CN103711452B (en) * | 2013-12-31 | 2016-01-06 | 西南石油大学 | A kind of gel slug packing well control method |
| CN104726080A (en) * | 2015-03-14 | 2015-06-24 | 肖传敏 | Profile control agent for thickening water well thin oil and preparation method thereof |
| CN104726080B (en) * | 2015-03-14 | 2017-07-28 | 肖传敏 | One kind is used for well thin oil thickening profile control agent and preparation method thereof |
| CN106401540A (en) * | 2015-07-21 | 2017-02-15 | 思达斯易能源技术(集团)有限公司 | Segmented oil-stabilizing water-controlling method and device |
| CN105754565A (en) * | 2016-03-23 | 2016-07-13 | 重庆科技学院 | Organic microsphere and inorganic silicate compounded type channeling sealing agent for thermal extraction of heavy oil and preparation method of channeling sealing agent |
| CN105754565B (en) * | 2016-03-23 | 2019-03-15 | 重庆科技学院 | A kind of organic micro-spheres and inorganic silicate Compositional type heavy oil thermal recovery fleeing proof agent and preparation method thereof |
| CN105781512A (en) * | 2016-04-19 | 2016-07-20 | 中国石油大学(华东) | Method for restraining huff and puff gas channeling of composite hot fluid by aid of foam-assisted temperature-sensitive phase change systems |
| CN105863581A (en) * | 2016-05-11 | 2016-08-17 | 中国石油天然气股份有限公司 | Oil extraction method for controlling water and increasing oil of high-water-content oil well of buried hill oil reservoir |
| CN107542423A (en) * | 2016-06-24 | 2018-01-05 | 中石化石油工程技术服务有限公司 | A kind of sieve tube completion horizontal well expansion sleeve pipe shutoff method |
| CN108625818A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | A kind of sieve tube completion horizontal well thermal production chemical packer and application method |
| CN107288578A (en) * | 2017-08-17 | 2017-10-24 | 李建峰 | One kind only takes hot ground hot hole solid hole plugging device and the method for not fetching water |
| CN108048056A (en) * | 2017-11-23 | 2018-05-18 | 中国石油天然气股份有限公司 | Channeling sealing system and preparation method and application thereof |
| CN109899025A (en) * | 2019-01-24 | 2019-06-18 | 西南石油大学 | The channeling countermeasure system and application method of offshore oilfield steam soak |
| CN110862809A (en) * | 2019-12-03 | 2020-03-06 | 中国石油化工股份有限公司 | Solid foam profile control composition, solid foam profile control slurry, preparation method of solid foam profile control slurry and profile control method |
| CN110862809B (en) * | 2019-12-03 | 2022-01-21 | 中国石油化工股份有限公司 | Solid foam profile control composition, solid foam profile control slurry, preparation method of solid foam profile control slurry and profile control method |
| CN111454703A (en) * | 2020-04-08 | 2020-07-28 | 宁夏朔光石油科技有限公司 | Formula and using method of composite temporary plugging agent for temporary plugging acidification of horizontal well |
| CN114961639A (en) * | 2022-07-28 | 2022-08-30 | 新疆新易通石油科技有限公司 | Steam flooding blocking and dredging combined development method for heavy oil reservoir |
| CN114961639B (en) * | 2022-07-28 | 2022-10-14 | 新疆新易通石油科技有限公司 | Steam flooding blocking and dredging combined development method for heavy oil reservoir |
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|---|---|
| CN102876304B (en) | 2015-05-20 |
| CN104745158A (en) | 2015-07-01 |
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