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Fracturing method for compact sandstone reservoir

A tight sandstone and fracturing technology, which is applied in the field of oil and gas production, can solve the problems of underutilization, rapid production decline, low permeability of reservoir matrix, etc., and achieve the effect of increasing the range of movable oil and improving the flow conductivity

Active Publication Date: 2019-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, due to the extremely low permeability of the reservoir matrix and the fact that natural fractures are not developed, or even if they are developed, they are not fully utilized, resulting in rapid production decline after fracturing, and it is difficult to achieve economic benefits

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  • Fracturing method for compact sandstone reservoir
  • Fracturing method for compact sandstone reservoir
  • Fracturing method for compact sandstone reservoir

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Embodiment Construction

[0037] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so that implementers of the present invention can fully understand how the present invention uses technical means to solve technical problems, and achieve the realization process of technical effects and according to the above-mentioned realization process The present invention is implemented concretely. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0038] In the prior art, tight sandstone reservoirs are generally developed economically and effectively by conventional horizontal well staged fracturing technology. However, due to the extremely low permeability of the reservoir matrix and the fact that natural fractures...

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Abstract

The invention discloses a fracturing method for a compact sandstone reservoir. The method comprises the steps that a double-crack system comprising a main crack and a secondary crack is constructed, diversion modification is conducted on the secondary crack in the double-crack system in the crack forming process, the secondary crack comprises a branch crack composed of natural cracks and a micro crack, the branch crack communicates with the main crack, and the micro crack communicates with the branch crack; and end desanding is realized in the double-crack system. According to the method, theflow conductivity of a crack system required by fracturing exploitation can be effectively improved, so that the movable oil range around the whole oil well is increased, and the effects of increasingthe yield and stabilizing the yield are achieved.

Description

technical field [0001] The invention relates to the field of oil and gas exploitation, in particular to a fracturing method for tight sandstone reservoirs. Background technique [0002] With the continuous development of oil and gas, conventional oil and gas resources are gradually exhausted. In order to effectively exploit existing oil and gas resources and improve the exploitation efficiency of oil and gas resources, many new oil and gas extraction technologies have been proposed in the prior art. Among them, one of the more mature mining technologies is fracturing mining technology. [0003] Fracturing refers to a method that uses hydraulic action to form cracks in oil and gas layers during the process of oil or gas recovery, also known as hydraulic fracturing. Fracturing is to artificially create fractures in the formation, improve the flow environment of oil underground, increase the production of oil wells, and play an important role in improving the flow conditions ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/267
Inventor 蒋廷学刘世华陈作孙海成吴春方李奎为刘建坤周林波
Owner CHINA PETROLEUM & CHEM CORP
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