Technology for realizing solid burying maximization and residual oil displacement by supercritically injecting CO2 (carbon dioxide) excessively into oil well

An over-injection and supercritical technology, which is applied to other gas emission reduction technologies, wellbore/well components, production fluids, etc., can solve the problems of narrow displacement residual oil area, high cost, and small area, so as to improve oil well resources Effects of utilization rate, stable storage status, and mature application technology

Active Publication Date: 2013-09-04
山东成林高新技术产业有限公司
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Problems solved by technology

CO 2 After injection into the oil layer, it is very easy to clean the viscous oil along the low-resistance area by cleaning, and it is easy to form the shortest smooth channel between the injection well and the oil outlet well, which limits the CO 2 The liquid diffuses to the surrounding area, dead angle and dead space
2. Due to the above reasons, th

Method used

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  • Technology for realizing solid burying maximization and residual oil displacement by supercritically injecting CO2 (carbon dioxide) excessively into oil well

Examples

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[0014] Below in conjunction with accompanying drawing of description, to oil well supercritical excessive injection of CO of the present invention 2 To achieve the maximum embedding and residual oil displacement technology in further detail:

[0015] like figure 1 , shown, abandoned, old oil fields or oil areas, choose to determine the CO 2 In the cementing area, check the archives, re-examine if necessary, select the injection well 2 and the oil output well 3 according to the ratio of 1:3-10, carry out workover operations until they are in good condition, drill new wells if necessary, and install them at the head of the injection well 2 High-pressure air pump 1, infusing CO into the oil layer 4 at supercritical pressure 2 . When there is no obvious pressure change, or the pressure does not rise but falls, the oil well 3 discharges oil and CO 2 When the ratio reaches the set standard, CO is injected into the injection well 2 2 Add a plugging agent to block the smooth chan...

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Abstract

The invention relates to a technology for realizing solid burying maximization and residual oil displacement by supercritically injecting CO2 (carbon dioxide) excessively into an oil well. According to the technology, a high-pressure air pump, an injection well, an oil producing well, a blocking area, a crack seam, a break seam and a CO2 dispersionarea are adopted. The technology for realizing solid burying maximization and residual oil displacement by supercritically injecting CO2 excessively into the oil well is characterized in that the high-pressure air pump injects CO2 into a waste oil filed or an oil layer in an oil area under the supercritical pressure via the injection well, and thick, sticky and dispersed residual oil is displaced to be discharged out of the oil producing well by the aid of ultrastrong permeability, diffusivity and cleaning capability of CO2 liquid. Blocking materials are repeatedly injected into the injection well at intervals to block a smooth channel between the injection well and the oil producing well, the CO2 liquid is forced to disperse and pressurize to crack oil layer partitions and penetrate oil area partitions on the same oil layer, and thus the CO2 liquid is dispersed to all partitions, dead angles and blind areas. Compared with the prior art, the technology for realizing solid burying maximization and residual oil displacement by supercritically injecting CO2 excessively into the oil well has the advantages of thorough residual oil displacement, large capacity of solid-buried CO2, stable sealed storage, less air pollution, freedom of underground pollution, and environment-protection and emission reduction under the support of creating new benefits, so that the technology has great popularization and application values.

Description

technical field [0001] The invention relates to a comprehensive technology for carbon sequestration and emission reduction and oil recovery, in particular to an oil well supercritical excessive injection of CO 2 Realize the technology of maximizing embedding and residual oil displacement. Background technique [0002] CO produced by modern human activities 2 , has far exceeded the storage and utilization mechanism of the normal cycle metabolism in nature, so that CO 2 A large amount of accumulation in the atmosphere has significantly affected the meteorological laws of the earth, climate change and the structure of the surface of the earth's crust, deteriorating the living conditions and environment of human beings. What is even more tragic is that although this negative change has been recognized and prevented by people, the reality is still developing and deteriorating at an accelerated rate within its breadth and depth, making human beings deeply entangled in the contra...

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Application Information

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IPC IPC(8): E21B43/16
CPCY02P90/70
Inventor 杨道永高俊民张广聊赵智勇杨新泉
Owner 山东成林高新技术产业有限公司
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