Establishment method and application method of oil and gas fracturing monitoring electrical model

Abstract

The invention discloses an oil and gas fracturing monitoring electrical model establishing method and an application method. The establishing method comprises the following steps that a fracturing fluid swept body is equivalent to a first miniature resistance-capacitance model formed by connecting a first equivalent resistor and a first equivalent capacitor in series; a stratum between the upper surface of the fracturing fluid sweep body and the ground is equivalent to a second miniature resistance-capacitance model, and the second miniature resistance-capacitance model comprises a second equivalent resistor and a second equivalent capacitor which are connected in series, and a third equivalent capacitor which is connected with the second equivalent resistor in parallel; the first micro resistance-capacitance model and the second micro resistance-capacitance model are connected in series to form a fracturing monitoring electrical model; and analyzing the potential difference data acquired by the monitoring points based on the fracturing monitoring electrical model to obtain the form data of the cracks corresponding to the positions detected by the monitoring points. According to the method, the problems that a traditional voltage signal analysis process is complex, manpower resource consumption is large, and the sweep process and sweep range of cracks in the fracturing process cannot be visually described are solved.

Description

technical field [0001] The invention belongs to the field of oil and gas fracturing monitoring, and in particular relates to an electrical model establishment method and application method for oil and gas fracturing monitoring. Background technique [0002] Fracturing fracture monitoring technology refers to the real-time monitoring and testing and evaluation of the whole process of coalbed methane, oil, shale gas and other fracturing processes through certain instruments, equipment and technical means. Through data processing, the direction, length, width and height of fractures are obtained. , conductivity, fluid loss coefficient of fracturing fluid, predicted production, calculation of fracturing benefits, etc., so as to evaluate the fracturing effect. [0003] Since a large amount of water or fracturing fluid is injected during the fracturing process, the fracturing fluid will flow along the micro-fractures and continuously expand the fractures. When the fracturing flui...

AI Technical Summary

Problems solved by technology

For this reason, the present invention proposes a method for establishing an electrical model for oil and gas fracturing monitoring. The method for establishing an electrical model for oil and gas fracturing monitoring solves the problem that the traditional process of analyzing voltage signals is complicated, consumes a lot of human resources, and cannot intuitively describe the process of fracturing. The Sweeping Process and Sweeping Range of Fractures

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