Three-dimensional comprehensive, efficient and accurate treatment technique for coal oil-gas coexistent mine

Abstract

The invention discloses a three-dimensional comprehensive, efficient and accurate treatment technique for a coal oil-gas coexistent mine. The technique comprises the following steps: S10, calculatingcoal seam gas geological reserves and surrounding rock oil-gas geological reserves; S20, establishing a reasonable borehole arrangement parameter model; S30, constructing a directional long borehole along the coal seam in the coal seam, and performing sectional hydraulic fracturing construction; S40, comprehensively evaluating the treatment effect by monitoring drainage data and combining with parameters such as drainage up-to-standard period, and providing a design basis for the treatment area under similar geological conditions. A multi-dimensional surrounding rock oil-gas-coal seam gas comprehensive drainage control technique aiming at disasters of the coal oil-gas coexistent mine is formed, dynamic space-time three-dimensional drainage of mining space disaster gas is achieved, mining efficiency and gas drainage efficiency are improved, and the problem of mine gas disaster is fundamentally solved.

Description

technical field [0001] The invention relates to the technical field of underground safety in coal mines, in particular to a three-dimensional, comprehensive, efficient and precise control technology for mines where coal, oil and gas coexist. Background technique [0002] The Ordos Basin is a multi-cycle Mesozoic craton basin and one of the largest coal and oil-gas depositional basins on land in my country. Since the Late Triassic, the lacustrine basin has formed a complete lacustrine-delta facies sedimentary evolution cycle in the process of occurrence-development-death sedimentary evolution, which provides good depositional environmental conditions for the coexistence of various types of natural gas. From the beginning of the 20th century to the present, scholars and experts led by Dai Jinxing, Wang Zhuquan, Yuan Fuli, etc. have discussed the structural evolution and sedimentary characteristics in the basin, and clarified the objective facts of the coexistence of coal, oil ...

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Problems solved by technology

Faced with the threat of multi-source disaster gases in the coal seam, surrounding rock oil and gas, and the underlying coal seam during the production process, the prevention and control measures of "spreading the net widely and densely distributing the holes" are currently adopted, and the first pumping (exploration) and then mining (excavation) are adopted. It has a certain control effect on the prevention and control of disaster gases, but there are problems such as large drilling engineering volume, low drilling utilization rate, and long time to reach the standard

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