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Temporary plugging method in shale oil fracturing artificial crack

A technology for artificial fractures and shale oil, which is used in earth-moving drilling, fluid production, wellbore/well components, etc. It can solve the problems of small fracturing volume and difficulty in artificial fractures.

Active Publication Date: 2021-08-20
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The problem to be solved by the present invention is that the volume of fracturing reconstruction is small and artificial fracture reconstruction is difficult. The purpose of this invention is to provide a temporary plugging method for shale oil fracturing artificial fractures, which solves the problem of artificial fracture reconstruction

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific implementation manners described here are only used to explain relevant content, rather than to limit the present invention.

[0043] In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0044] In the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0045] A shale oil fracturing artificial fracture 2 temporary plugging process, comprising the following steps:

[0046] S1. Determine the height of the artificial...

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Abstract

The invention discloses a temporary plugging method in a shale oil fracturing artificial crack. The temporary plugging method comprises the following steps that the height of the artificial fracture is determined; the temporary plugging thickness in the artificial crack is determined; the use amount of a temporary plugging agent in the artificial crack is determined; temporary plugging liquid composed of a temporary plugging agent, active water and a propping agent is injected at a certain construction displacement, and temporary bridge plugging is formed in the artificial crack; and the pressure of the temporary bridge plug is controlled, so that the reservoir forms a steering crack. According to the method, the logging data of the shale oil reservoir is utilized, and the temporary plugging bridge is arranged in the fracturing (artificial fracture) through the temporary plugging technology, so that the steering fracture is formed in the artificial fracture, and fracturing transformation of the shale oil reservoir is achieved.

Description

technical field [0001] The invention relates to the field of shale oil exploration and development, in particular to a method for temporarily plugging artificial fractures in shale oil fracturing. Background technique [0002] In recent years, my country has stepped up the exploration of shale oil reservoirs, and many oil and gas fields have made exploration breakthroughs, but the development is difficult. Compared with the development of conventional oil and gas fields, the physical properties of shale oil reservoirs are poor, the volume of fracturing stimulation is small, the production is low, and artificial fracture stimulation is difficult. Contents of the invention [0003] The problem to be solved by the present invention is that the volume of fracturing reconstruction is small and artificial fracture reconstruction is difficult, and the purpose is to provide a temporary plugging method for shale oil fracturing artificial fractures, which solves the problem of artif...

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Application Information

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IPC IPC(8): E21B33/13E21B43/26E21B49/00
CPCE21B33/13E21B43/261E21B49/00
Inventor 周长林马辉运曾冀陈伟华唐波涛叶颉枭李金穗颜洁唐鑫苑杨林
Owner PETROCHINA CO LTD
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