High-temperature blocking and adjusting device and method for super-heavy oil reservoir steam flooding
A super-heavy oil and steam flooding technology, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problem of high requirements for construction technology and reservoir cognition, permanent pollution of oil layers, and lack of options In order to achieve the effect of prolonging the effective period of blocking adjustment, reducing interfacial tension and reducing engineering risk
Active Publication Date: 2014-01-29
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0006] In the high-temperature plugging and adjustment method for steam flooding of ultra-heavy oil reservoirs, solid phase particles and thermosetting resins are widely used due to their high plugging strength and good temperature resistance, but neither of them has selectivity and is likely to cause The oil layer is permanently polluted, the requirements for construction technology and reservoir cognition are too high, and the engineering risk is relatively high
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[0037] In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are listed below and described in detail in conjunction with the accompanying drawings.
[0038] Such as figure 1 as shown, figure 1 It is a structural diagram of high-temperature blockage and adjustment equipment for steam flooding of super-heavy oil reservoirs of the present invention. The high-temperature blockage and adjustment equipment for steam flooding in super-heavy oil reservoirs consists of injection equipment 1, liquid distribution pool 2, thermal recovery steam injection wellhead 3, casing 7, heat-insulated tubing 8, nitrogen injection equipment 9 and steam injection equipment 10. Injection equipment 1 is located in the high-temperature and high-pressure area of the well site of the steam drive well, and is connected to the small four-way port 3 of the thermal recovery steam injection wellhead 3, and is used to inject ...
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The invention provides a high-temperature blocking and adjusting device and method for super-heavy oil reservoir steam flooding. The high-temperature blocking and adjusting device for super-heavy oil reservoir steam flooding comprises an injection device, a thermal-recovery steam injection well mouth, a nitrogen injection device and a steam injection device. The injection device is connected with the thermal-recovery steam injection well mouth for injecting gel solutions or foaming agent solutions, the nitrogen injection device is connected with the thermal-recovery steam injection well mouth and used for generating and injecting high-purity nitrogen, and the steam injection device is connected with the thermal-recovery steam injection well mouth and used for generating and injecting high-dryness steam. According to the high-temperature blocking and adjusting device and method for super-heavy oil reservoir steam flooding, gel and nitrogen foams are combined, comprehensive water content of a steam flooding well group can be obviously lowered, the gas oil ratio can be obviously improved, the high-temperature blocking and adjusting effect of a super-heavy oil reservoir can be greatly improved, and blocking and adjusting cost is saved.
Description
technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a high-temperature blocking and regulating device and a high-temperature blocking and regulating method for steam flooding of super-heavy oil reservoirs. Background technique [0002] Super heavy oil reservoirs refer to heavy oil reservoirs with degassed crude oil viscosity greater than 50000mPa.s under formation temperature conditions. Due to the high viscosity of crude oil, it is difficult for crude oil to flow under the original formation conditions, so the development method of thermal recovery must be adopted. [0003] Steam injection is currently the most important thermal recovery method for heavy oil, mainly including steam huff and puff and steam flooding. For ultra-heavy oil reservoirs, steam flooding can generally increase the recovery rate by about 15% on the basis of steam huff and puff, and the overall recovery rate can reach about 25%-45%. [0004]...
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IPC IPC(8): E21B43/24E21B43/22
Inventor 王世虎刘冬青唐培忠曹嫣镔王善堂尚跃强盖平原马爱青刘艳平殷方好蔡文斌
Owner CHINA PETROLEUM & CHEM CORP
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