Arrangement method of vertical oil and gas well penetrating through coal seam long wall mining area

Abstract

The invention provides an arrangement method of a vertical oil and gas well penetrating through a coal seam long wall mining area, and belongs to the arrangement method of the vertical oil and gas well. The method comprises the following steps of: (1) primarily determining the arrangement position of the vertical oil and gas well penetrating through the coal seam long wall mining area; (2) performing numerical simulation analysis of the oil and gas well stability under the coal seam long wall mining influence; and (3) performing pitshaft protection coal pillar dimension design and well distribution position optimization on the basis of pitshaft deformation quantity numerical simulation analysis under the long wall mining influence. According to the method, the arrangement position of the vertical oil and gas well penetrating through the coal beam long wall mining region is selected through the work in three aspects including geological data collection, geological model building and pinshaft deformation quantity prediction under the coal seam mining influence. The method has the advantages that the stratum features of the area, the coal seam mining technical parameters and the integral mining influence of the sequential mining of the long wall working faces at the two sides of a pinshaft protection coal pillar are integrated; the reliability is high; and the goals of effectively controlling the stability of the vertical oil and gas well penetrating through the coal seam mining area under the mining influence and realizing safe and efficient harmonized mining of shallow coal seam and deep oil and gas resources are achieved.

Description

technical field [0001] The invention relates to a method for arranging vertical oil and gas wells, in particular to a method for arranging vertical oil and gas wells in longwall mining areas that penetrate coal seams. Background technique [0002] In the past few decades, in the field of oil and gas development, academia and industry have carried out a lot of work on the wellbore stability of oil and gas wells, and achieved fruitful results, but most of the research has focused on the wellbore stability during drilling. The stability unfolded. Research on the impact of coal seam longwall mining on the stability of vertical oil and gas wells in down production areas - an emerging engineering problem - is in its infancy. At present, in field engineering practice, oil and gas wells are arranged along the centerline of the protective coal pillar (coal pillar in the section of the longwall working face), without considering the impact on the stability of oil and gas wells caused...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for arranging vertical oil and gas wells in the longwall mining area of ​​the coal seam, so as to solve the problem of the stability of the oil and gas wells in the mining area of ​​the coal seam that are affected by the longwall mining of the coal seam during the coordinated exploitation of the coal seam and deep oil and gas resources

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