Shale gas multi-well-group efficient mining spacing optimization method

Abstract

The invention provides a shale gas multi-well-group efficient mining spacing optimization method, which belongs to the technical field of shale gas mining. The shale gas multi-well-group efficient mining spacing optimization method comprises the steps of: firstly, making an analogy of domestic and foreign engineering examples and construction parameters according to geological conditions, and carrying out qualitative judgment on a reasonable degree of a developing well spacing in a new region; secondly, establishing a steady state productivity evaluation mathematical model taking a shale gas well as a basic unit, and acquiring a yield expression; and finally, improving the shale gas reservoir fracturing stimulation operating effect, and increasing gas well productivity and a recovery ratioby adopting a reasonable concrete construction method. The shale gas multi-well-group efficient mining spacing optimization method can improve the operation efficiency, reduce the engineering cost, can successfully improve the shale gas reservoir fracturing stimulation operating effect, increase the gas well productivity and the recovery ratio, and further accelerates the shale gas mining process.

Description

technical field [0001] The invention relates to the technical field of shale gas exploitation, in particular to a method for optimizing the spacing between efficient exploitation of multi-well groups of shale gas. Background technique [0002] Shale gas is unconventional natural gas produced in reservoir rock series dominated by organic-rich shale. Shale reservoirs are characterized by low porosity, low permeability, and ultra-tightness. There are a large number of nanoscale pores in shale reservoirs, which are the main storage space for shale gas. The microcracked pores and larger pores in the reservoirs have a greater contribution to the permeability. [0003] In recent years, due to the breakthrough and large-scale promotion of exploration and development technology, major breakthroughs have been made in the development of shale gas in North America, which has changed the world's natural gas supply pattern to a certain extent. In the past ten years, my country's shale g...

AI Technical Summary

Problems solved by technology

In the existing technology, for the deployment of well pattern and well spacing, it is usually discovered after exploration that on-site development can be carried out, and then the initial scale development is carried out, without considering the overall deployment. Therefore, it is necessary to establish a shale gas platform, which requires a shale gas multiple Optimal design method of spacing between wells for high-efficiency production of well groups Design well spacing to improve the effect of fracturing and stimulation operations in shale gas reservoirs, and increase the productivity and recovery of gas wells

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