Ultra-shallow layer-shallow layer shale gas geological engineering integrated development method

Abstract

The invention belongs to the technical field of shale gas development, aims to solve the problem of a low input-output ratio of ultra-shallow layer-shallow layer shale gas development in the prior art, and particularly relates to an ultra-shallow layer-shallow layer shale gas geological engineering integrated development method. The method comprises the following steps of arranging a drilling well site based on historical geological data and survey data; performing full-drilling coring, and establishing a lithologic histogram; testing the gas content, and determining a high-quality gas-bearing interval; performing underground in-situ ground stress measurement, geophysical logging and drilling three-dimensional imaging by adopting a stress relief method, and establishing a geological structural mechanical model of the gas-bearing interval; testing mineral components and rock mechanical parameters, and making a fracturing scheme; performing fracturing operation, monitoring hydraulic fracturing fracture network information, performing gas testing to obtain daily gas production, judging whether the daily gas production meets the economic benefit requirement or not, and if not, arranging the drilling well site again; and if yes, arranging and developing a well pattern in a rolling manner. The method is simple in process and low in cost, and ultra-shallow layer-shallow layer shale gas resources can be effectively developed.

Description

technical field [0001] The invention belongs to the technical field of shale gas development, and in particular relates to an ultra-shallow-shallow shale gas geological-engineering integrated development method. Background technique [0002] Shale gas is a clean energy with huge resources and development potential, which is related to the major strategic needs of national energy security and sustainable economic development. my country's Fuling, Changning, Weiyuan, Zhaotong and other national shale gas demonstration areas have achieved scale-effective development of shale gas in the middle and deep layers with a burial depth of 2000m-3500m, and the annual production of shale gas has continued to grow, and a supporting development has been formed technology and equipment. Ultra-shallow-shallow shale gas refers to natural gas with a burial depth of less than 1000m. In recent years, oil companies and the Chinese Academy of Sciences have discovered high-quality ultra-shallow-sha...

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Problems solved by technology

[0004] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of low input-output ratio in the development of ultra-shallow-shallow shale gas in the prior art, the present invention provides an ultra-shallow-shallow shale gas A geological-engineering integrated development method, the method includes: Step S100, based on historical geological data and block geological survey data, obtain the area range and sedimentary characteristics of shale reservoirs, and deploy drilling well positions

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