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A modeling method for post-fracture shale gas reservoirs based on microseismic data

A technology of shale gas reservoirs and modeling methods, which is applied in the field of establishing geological models of shale gas reservoirs after fracturing based on microseismic data, which can solve the problems of not being able to reflect the real geometry of hydraulic fractures, and achieve accurate numerical simulation and easy use Effect

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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Problems solved by technology

The existing second type of method directly connects the microseismic event points and is insufficient to establish a discrete fracture model, which is not enough to reflect the real geometric shape of hydraulic fractures.

Method used

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  • A modeling method for post-fracture shale gas reservoirs based on microseismic data
  • A modeling method for post-fracture shale gas reservoirs based on microseismic data
  • A modeling method for post-fracture shale gas reservoirs based on microseismic data

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. 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.

[0036] like figure 1 As shown, the shale gas reservoir modeling method after fracturing based on microseismic data of the present invention comprises the following steps,

[0037] Step 1. Data preparation and processing;

[0038] The required data include the pre-pressure geological model and microseismic data. The pre-pressure geological model is defined by two sets of data, the column coordinate COORD of the corner grid and the depth ZCORN of the intersection point of the upper and lower surfaces of the grid and the column. When the number of grids in the pre-press geolo...

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Abstract

The present invention proposes a modeling method for shale gas reservoirs after fracturing based on microseismic data. According to the geometric characteristics of hydraulic fractures and natural fracture networks, Hough transform and discrete fracture coarsening techniques are used to reconstruct the multi-scale fracture system respectively. Gas reservoir model after fracturing. The model established according to the method of the present invention makes full use of the microseismic distribution information, and the reconstructed fracture network is more accurate. On this basis, the numerical simulation of shale gas reservoirs can be performed more accurately, thereby more accurately predicting the productivity of shale gas wells , Design and adjust the development plan.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a method for establishing a post-fracture shale gas reservoir geological model based on microseismic data. Background technique [0002] Due to the characteristics of tightness and low permeability of shale gas reservoirs, in order to increase shale gas productivity, it is necessary to use staged fracturing horizontal well technology to stimulate shale gas reservoirs in the process of shale gas development. The artificial hydraulic fractures of different scales connected to the natural fracture network by staged fracturing technology will significantly increase the permeability of shale reservoirs, have a great impact on the fluid flow in shale reservoirs, and will directly affect the development effect of gas reservoirs. Numerical simulation technology is an important tool to predict gas well productivity. Establishing an accurate post-fracture shale gas reservoi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/34G01V1/30
CPCG01V1/345G01V1/30
Inventor 戴城计秉玉王卫红刘华胡小虎郭艳东王妍妍
Owner CHINA PETROLEUM & CHEM CORP
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