Method for determining dosage of fracturing fluid for increasing formation energy

Abstract

The invention relates to a method for determining the dosage of fracturing fluid for increasing formation energy, and belongs to the technical field of oil and gas reservoir exploration and development. The method comprises the steps that the original formation pressure, the reservoir thickness, the comprehensive compression coefficient, the formation pressure after fracturing and the half-fracture length of a fracturing fracture are obtained; according to the original formation pressure and the formation pressure after fracturing, the variable quantity of the formation pressure is obtained, and then the limit oil drainage radius is obtained; the well control area of the fractured well is calculated according to the limit oil drainage radius and the semi-fracture length; the well control reservoir volume is obtained according to the well control area and the reservoir thickness; and further obtaining the volume of the fracturing fluid required by the reservoir under the formation pressure after fracturing. The formation pressure after fracturing is determined by reaching the formation pressure according to design requirements, the formation pressure is improved as much as possible to achieve the purpose of improving formation energy, the use amount of fracturing fluid is increased to the maximum extent, the swept volume of the fracturing fluid in a reservoir is enlarged, and a fractured well reaches the expected oil production capacity.

Description

technical field [0001] The invention relates to a method for determining the dosage of fracturing fluid for increasing formation energy, and belongs to the technical field of exploration and development of oil and gas reservoirs. Background technique [0002] For the development of low-permeability reservoirs and tight oil (gas) reservoirs, fracturing technology is the key technology for efficient and profitable development of reservoirs. Due to the characteristics of low-permeability reservoirs, the low permeability causes a large pressure difference at the start-up of reservoir production , if the production pressure difference is lower than the start-up pressure difference, the oil (gas) well will not be able to produce. Only when the production pressure difference is greater than the start-up pressure difference can it be produced normally. Therefore, the conductivity of the oil layer is improved by fracturing. It is very important to increase the energy of the oil layer...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for determining the amount of fracturing fluid used to increase formation energy, so as to solve the problem that the existing technology cannot increase productivity

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