Flow simulation method suitable for shale gas reservoir thermal exploitation

Abstract

The invention relates to a flow simulation method suitable for shale gas reservoir thermal exploitation, which comprises the following steps: establishing a gas reservoir geometric model according to the development scale of a shale gas reservoir mine field, the fracture distribution condition after hydraulic fracturing, the size of a reservoir transformation area obtained through microseism and the microfracture distribution; describing an artificial fracture through a discrete fracture model; establishing a shale gas reservoir dual-medium fractured horizontal well seepage field model based on the reservoir transformation area and the reservoir non-transformation area; taking the artificial fracture as a constant-temperature heat source, and establishing a shale gas reservoir thermal field model; and coupling the seepage field model and the thermal field model, subdividing the geometric model based on a Delaunay triangular mesh, and further solving the geometric model to realize numerical simulation of thermal development of the complex fractured shale gas reservoir. According to the invention, the segmented pressure horizontal well thermal development model of the composite gas reservoir of the shale gas reservoir is established, and guidance is provided for shale gas reservoir thermal exploitation potential evaluation and future mine field development.

Description

Technical field [0001] The present invention relates to a very good oily gas field development, in particular to a flow simulation method suitable for the thermal mining of shale gas. Background technique [0002] With the improvement of oil and gas mining technology, the increase in the demand for oil and gas resources, the oil and gas resources are increasingly received and emphasized, and gradually become an important supplement to important strategic resources. The shale gas has become a hot spot in the current oil and gas exploration and development with a wide range of resources, large resources, and long-term cycle. The rock diameter of the rock gas is nano-stage, the memory is diverse, the porosity, the permeability is extremely low, and belongs to a typical dense porous medium. Compared with the conventional gas Tibet, the shale gas transfer mechanism is complex and the flow mode is nonlinear. The segmental fracturing step technology provides a foundation for shale gas-b...

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