Method for evaluating applicability of arc pulse fracturing technology

Abstract

The invention provides a method for evaluating the applicability of arc pulse fracturing technology, which belongs to the field of oil and gas stimulation. The method includes: (1) using formation rock samples, simulated rock samples or outcrop rock samples to conduct arc pulse fracturing experiments: in the wellbore of the rock samples, first add fluid samples, and then put the connected electrodes into the wellbore , using the method of variable discharge voltage, carry out three or more groups of arc pulse fracturing experiments, and obtain the parameters of the cracks generated around the wellbore of each sample; The discharge parameters and fluid parameters are used as input, and the pulse fracturing peak value calculation method is used to calculate the respective pulse pressure peak values; (3) analyze the fracture parameters obtained in step (1) and the pulse pressure peak value obtained in step (2), and obtain the fracture value. The relationship between the parameters and the peak pressure of the pulse pressure, the discharge parameter corresponding to the optimal fracture parameter is selected as the optimal discharge parameter.

Description

technical field [0001] The invention belongs to the field of oil and gas stimulation, and in particular relates to an applicability evaluation method for arc pulse fracturing technology. Background technique [0002] In the field of traditional oil and gas reservoir stimulation technology, hydraulic fracturing technology, as an important oil and gas stimulation measure, is widely used at home and abroad. The principle of oil and gas layer fracturing is to use the liquid to transmit the pressure, and the chemical liquid (fracturing fluid) with a certain viscosity is injected into the oil and gas layer along the wellbore with a high displacement by the fracturing train group, causing the rock in the formation to break, and then a certain scale is formed. Formation fractures, thereby increasing the production of oil and gas wells. This method has certain limitations, such as the need to consume a large amount of water resources, the injected chemical liquid (fracturing fluid) ...

AI Technical Summary

Problems solved by technology

[0007] Due to the characteristics of low energy and low voltage, the existing arc pulse enhanced oil recovery technology can only create microscopic cracks in rocks, but cannot produce cracks of a certain scale, so it cannot achieve the goal of greatly increasing oil and gas production.

In the prior art, there is no model or method for directly calculating the peak pulse pressure generated by the high-energy arc pulse fracturing technology

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