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Real-time monitoring method and system for four-dimensional geometric features of oil and gas fracturing cracks

A four-dimensional geometric and real-time monitoring technology, applied in radio wave measurement systems, measurement devices, earthwork drilling and production, etc., can solve the problem of inability to extract resistivity changes in deep fracturing layers, low reliability of inversion methods, and inability to effectively respond to fractures The problems of fracture length, fracture width and fracture height can be improved to improve the effect of fracturing monitoring, reduce the cost of fracturing monitoring and increase the output

Active Publication Date: 2018-10-12
香港中文大学(深圳)城市地下空间及能源研究院
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Problems solved by technology

[0005] The present invention provides a method and system for real-time monitoring of four-dimensional geometric characteristics of oil-gas fracturing fractures, which overcomes the above problems or at least partially solves the above problems, and solves the problem of low reliability of inversion means in the prior art and the inability to extract deep fractured layers The resistivity change of the position cannot effectively reflect the fracture length, fracture width and fracture height of complex fractures

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[0033] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0034] Such as figure 1 As shown, the figure shows a real-time monitoring method for four-dimensional geometric characteristics of oil and gas fracturing fractures, including:

[0035] During the construction of each fracturing section, electromagnetic wave excitation signals containing different frequencies are simultaneously transmitted to the fracturing target layer at a set distance parallel or perpendicular to the direction of the horizontal well, and the fracturing points at several monitoring points within the monitoring range of the fracturing pilot well are obtained. Electric field signal or magnetic field signal before fracturing and electric field signal or magne...

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Abstract

The embodiment of the invention provides a real-time monitoring method and system for four-dimensional geometric features of oil and gas fracturing cracks. The method comprises the steps that pseudo-random electromagnetic waves are used for exciting a fracturing target area, the correlation between related macroscopic physical parameters and a microstructure of a fracturing layer is analyzed according to electric field airspace vector differential feedback of electromagnetic waves different in frequency before and after fracturing, an electromagnetic rock physical model of the fracturing layeris established, the crack length, crack height, crack width, reconstruction size and other geometric crack features of the cracks are clarified, and an interpretation template is established; fracturing of oil and gas resources can be efficiently, economically and effectively monitored in real time, electric field parameters of four dimensions (x, y, z, t) of the fracturing target area are obtained, and the fracturing effect on all fracturing sections of a fracturing well is evaluated. By means of the real-time monitoring method and system, the fracturing construction is effectively guided, the fracturing monitoring cost is greatly reduced, the fracturing monitoring effect is improved, the yield of a single well is increased, and the real-time monitoring method and system play an important role in the increase of the yield of the single well in the development process of the oil and gas resources in China.

Description

technical field [0001] The invention relates to the technical field of oil and gas development in the field of exploration geophysics, and more specifically, to a method and system for real-time monitoring of four-dimensional geometric characteristics of oil and gas fracturing fractures. Background technique [0002] In the field of petroleum, 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 at the bottom of oil wells, slowing down interlayers and improving the production status of oil layers. There are two types of fracturing methods: hydraulic fracturing and high-energy gas fracturing. Hydraulic fracturing is to inject fluid into the well at h...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/30G01V3/38E21B49/00E21B43/26
CPCE21B43/26E21B49/00G01V3/30G01V3/38
Inventor 何继善李建华
Owner 香港中文大学(深圳)城市地下空间及能源研究院
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