A Flow Simulation Method Applicable to Thermal Exploitation of Shale Gas Reservoirs

Abstract

The invention relates to a flow simulation method suitable for thermal exploitation of shale gas reservoirs, comprising the following steps: according to the development scale of shale gas reservoir mines, the distribution of cracks after hydraulic fracturing, and the size of the reservoir reconstruction area obtained through microseismic As well as micro-fracture distribution, the geometric model of the gas reservoir is established; the artificial fracture is described by the discrete fracture model; and the seepage field model of the dual-media fracturing horizontal well in the shale gas reservoir is established based on the reservoir stimulated area and the reservoir untreated area; the described Artificial fractures are used as a constant temperature heat source to establish a thermal field model for shale gas reservoirs; the seepage field model is coupled with the thermal field model, and the geometric model is subdivided based on the Delaunay triangular grid, and then the geometric model is solved to realize complex fractures. Numerical simulation of thermal development of shale gas reservoirs. The invention establishes a shale gas reservoir composite gas reservoir segmental pressure horizontal well thermal development model, and provides guidance for thermal mining potential evaluation of shale gas reservoirs and future mine development.

Description

technical field [0001] The invention relates to the field of unconventional oil and gas field development, in particular to a flow simulation method suitable for thermal exploitation of shale gas reservoirs. Background technique [0002] With the improvement of oil and gas reservoir exploitation technology and the increase of demand for oil and gas resources, unconventional oil and gas resources are getting more and more attention and attention, gradually becoming a powerful supplement to important strategic resources. Shale gas has become a hotspot in current oil and gas exploration and development due to its wide distribution, large amount of resources, and long period of stable production. The diameter of pores in shale gas reservoirs is nanoscale, the occurrence modes are diverse, and the porosity and permeability are extremely low, which is a typical dense porous medium. Compared with conventional gas reservoirs, the migration mechanism of shale gas reservoirs is compl...

AI Technical Summary

Problems solved by technology

There is a large amount of adsorbed gas on the surface of the framework of shale gas reservoirs. Raising the formation temperature can promote the desorption of adsorbed gas from the surface of the framework from the perspective of mechanism to achieve the purpose of increasing production. However, technologies such as electric fractures have not been applied to the actual development of shale gas reservoirs. The actual development effect is unknown, and it is necessary to carry out productivity evaluation research, study the potential of heating artificial fracture technology in the development of shale gas reservoirs, and provide guidance for the future thermal development of shale gas reservoirs

Images