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Layered sandstone reservoir recovery method and device

A technology of layered sandstone and recovery method, which is applied in the fields of fluid production, earthwork drilling, wellbore/well components, etc., can solve the problems of deep liquid flow diversion and injection water swept volume, etc.

Pending Publication Date: 2020-07-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a layered sandstone oil reservoir recovery method and device to solve the problem that it is difficult to achieve the anticipation of deep liquid flow diversion and expand the swept volume of injected water by a single deep regulation and displacement measure

Method used

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  • Layered sandstone reservoir recovery method and device
  • Layered sandstone reservoir recovery method and device
  • Layered sandstone reservoir recovery method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0058] figure 1 It is a flowchart of a method for recovering a layered sandstone reservoir provided by the first embodiment of the present invention. Such as figure 1 As shown, this embodiment provides a method for recovering a layered sandstone reservoir, which includes the following steps:

[0059] S101. Determine the water injection efficiency of each water injection well in the preset area and the average water injection efficiency of all water injection wells in the preset area. This embodiment adopts the overall adjustment of all the water injection wells in the preset area of ​​the oil field. According to the different conditions of each water injection well, on the basis of determining the average water injection efficiency of all the water injection wells, different water injection wells are adjusted differently , In order to realize that the water injection efficiency of all water injection wells in the preset area can be improved overall.

[0060] figure 2 It is a fl...

Embodiment 2

[0140] This embodiment provides a layered sandstone reservoir recovery device, which is applied to the layered sandstone reservoir recovery method described in the first embodiment.

[0141] Picture 9 It is a structural diagram of a layered sandstone oil reservoir recovery device provided in the second embodiment of the present invention. Such as Picture 9 As shown, the layered sandstone oil reservoir recovery device 100 provided in this embodiment includes:

[0142] The determining module 110 is used to determine the water injection efficiency of each water injection well in the preset area and the average water injection efficiency of all water injection wells in the preset area.

[0143] The determination module 110 determines the water injection efficiency of each water injection well in the preset area and the average efficiency of all water injection wells in the preset area, and adjusts all the water injection wells in the preset area of ​​the oil field as a whole, according...

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Abstract

The invention provides a layered sandstone reservoir recovery method and a layered sandstone reservoir recovery device. The layered sandstone reservoir recovery method comprises the steps of determining the water injection efficiency of each water injection well in a preset area and the average water injection efficiency of all the water injection wells in the preset area; carrying out deep profile control on the water injection wells with the water injection efficiency lower than the average water injection efficiency; when the water content of the preset area decreases and then rises again,re-determining the water injection efficiency of each water injection well and the average water injection efficiency of all the water injection wells, and distributing the water injection amount of each water injection well according to the re-determined water injection efficiency of each water injection well and the re-determined average water injection efficiency of all the water injection wells, wherein layered injection allocation is carried out on each water injection well according to each longitudinal water absorption layer of the water injection wells during water injection. Accordingto the method provided by the invention, through the combined action of deep profile control and water injection rate optimization, the recovery ratio of a layered sandstone reservoir can be improved.

Description

Technical field [0001] The invention relates to the technical field of oil field development, and in particular to a method for improving the recovery rate of a layered sandstone oil reservoir. Background technique [0002] Water injection development is one of the main methods of oil field development. It is a measure to use water injection wells to inject water into the oil layer to supplement and maintain the pressure of the oil layer. After long-term water injection development in my country’s onshore oilfields, most of the oilfields have entered the stage of high water cut development. A large amount of injected water is in an inefficient and ineffective cycle. In addition, my country’s continental reservoirs have developed longitudinally interbedded layers, resulting in fluid production and water absorption. The contradiction is prominent, leading to large differences in water absorption between water injection wells, rapid rise of water cut in oil wells, and low overall wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B43/14E21B49/00
CPCE21B43/20E21B43/14E21B49/00
Inventor 周代余赵冀陶正武王业飞孙致学旷曦域李杨
Owner PETROCHINA CO LTD