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Method for governing large pore paths of oil deposit through oil-water well type transformation

A large-channel, oil-water well technology, applied in earthwork drilling, wellbore/well components, production fluids, etc., can solve the problems of large seepage channels, serious water circulation, and difficulties

Inactive Publication Date: 2016-08-03
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0002] Due to the geological structure characteristics of large-pore reservoirs, the seepage channels are more advantageous, and the invalid water cycle is serious, resulting in poor water flooding effect
On the basis of the description of the high-permeability zone, improving the original injection-production well pattern, plugging adjustment and high-efficiency oil displacement cannot achieve the expected results, and the adjustment is difficult. It is very difficult to further increase the recovery under the current well pattern conditions. Network adjustment must change the liquid flow direction to increase the swept volume to achieve the purpose of enhancing recovery

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  • Method for governing large pore paths of oil deposit through oil-water well type transformation

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Embodiment Construction

[0025] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0026] like figure 1 as shown, figure 1 It is a flow chart of a specific embodiment of the method for adjusting flowlines of oil-water well conversion in large-pore reservoirs of the present invention. This method considers that the plugging and adjustment of the original injection-production well pattern in large-pore reservoirs has not achieved the expected effect, and the existence of geological impermeable interlayers is also considered.

[0027] In step 101. fine reservoir geological research, mainly study stratigraphic correlation, structure, reservoir, sedimentary facies, oil-water system, temperature-pressure system, and classify and describe large pores. The process goes to step 102.

[0028] In step 102, on the basis of fine geological res...

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Abstract

The invention provides a method for governing large pore paths of an oil deposit through oil-water well type transformation. The method comprises the following steps: firstly, performing fine oil deposit geologic feature research, and performing classified description on the large pore paths; secondly, performing analysis of development effect influence factors, including pressure and perforation influence; thirdly, performing fine description of a geologic non-seepage interlayer; fourthly, designing a variable flow line well pattern adjustment scheme according to the fine description of the geologic non-seepage interlayer, performing layered water flooding recovery on continuous distribution areas of the non-seepage interlayer, and transforming the oil-water well type for the non-seepage interlayer; fifthly, performing index predication through a numerical modeling technology, and selecting an optimal plan. The method is high in practicability, can economically and effectively improve the recovery efficiency of the oil deposit, and greatly increases accumulated oil production of old oil fields.

Description

technical field [0001] The invention relates to the technical field of oil field development, in particular to a method for controlling large pores in oil reservoirs by using oil-water well conversion. Background technique [0002] Due to its geological structure characteristics, the large pore reservoirs have great advantages in seepage channels and serious ineffective water circulation, resulting in poor water flooding effect. On the basis of the description of the high-permeability zone, improving the original injection-production well pattern, plugging adjustment and high-efficiency oil displacement cannot achieve the expected results, and the adjustment is difficult. It is very difficult to further increase the recovery under the current well pattern conditions. Network adjustment must change the liquid flow direction to increase the swept volume to achieve the purpose of enhancing recovery. For this reason, we have invented a new method of using oil-water well convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20
Inventor 毕义泉王端平李振泉佟颖谭河清任峤贾俊山刘志宏柳世成黄迎松贾元元王占国李振东李文华张伟伟
Owner CHINA PETROLEUM & CHEM CORP
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