A method and device for determining the brittleness of shale gas formation
A shale gas and formation technology, which is applied in measuring devices, seismology, seismic signal processing, etc., can solve problems such as inaccurate brittleness of shale gas formations, and achieve the effect of improving accuracy
Active Publication Date: 2019-06-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0005] The purpose of the present invention is to provide a method for determining the brittleness of shale gas formations, which solves the problem of inaccurate brittleness of shale gas formations, and provides accurate data for the smooth progress of shale gas formation exploitation.
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[0040] In order to make those skilled in the art better understand the solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0041] The flow chart of a specific embodiment of determining the brittleness of shale gas formation provided by the present invention is as follows: figure 1 As shown, the method can include:
[0042] Step S101: Obtain the Young's modulus E of each sampling point of the shale gas formation in the area to be detected, and determine the maximum value E of the Young's modulus in each sampling point max and Young's modulus minimum E ...
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The invention discloses a method for determining the brittleness of a shale gas formation, according to the Young's modulus E, the maximum value of the Young's modulus Emax, the minimum value of the Young's modulus Emin, the Poisson's ratio σ, and the Poisson's ratio of each sampling point The maximum value σmax, the minimum value of Poisson's ratio σmin, the total organic carbon content TOC, and the maximum total organic carbon content TOC_m determine the brittleness of the shale gas formation at each sampling point, and the factors affecting the brittleness of the shale gas formation are considered more comprehensively. Thereby, more accurate results of formation brittleness can be obtained, the accuracy of detecting the brittleness of shale gas formations is improved, and the normal operation of shale gas exploitation is facilitated. The present invention also provides a device for determining the brittleness of shale gas formations, It has the beneficial effects mentioned above.
Description
technical field [0001] The invention relates to the field of shale gas, in particular to a method and a device for determining the brittleness of shale gas formations. Background technique [0002] Shale gas, also known as tight gas layer gas, is a natural gas resource that can be exploited in shale layers. China's recoverable shale gas reserves rank first in the world. Shale gas development has the advantages of long production life and long production cycle. Most gas-producing shale is widely distributed, thick, and generally contains gas, which enables shale gas wells to produce gas at a stable rate for a long time. [0003] Compared with conventional reservoirs, shale gas reservoirs have the characteristics of low altitude and low permeability, and require large-scale fracturing to form industrial production capacity. The brittleness of shale gas formation is one of the important rock mechanical characteristic parameters considered in shale fracture network fracturing. ...
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IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/624
Inventor 宗兆云印兴耀邓炜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)