GIS technology-based coal-series gas longitudinal development interval optimization method

Abstract

The invention discloses a GIS technology-based coal-series gas longitudinal development interval optimization method, including the steps: building a coal-series gas longitudinal development intervalbasic database, and preliminarily determining a coal-series gas longitudinal development interval according to a coal-series gas reservoir combination mode; constructing a coal-series gas interval optimal evaluation index system, and obtaining an interval screening result by utilizing an interval screening condition; selecting a weighting index, and determining the weight and score of each weighting index in the coal-series gas interval in an expert scoring mode; performing weighted calculation on the index score in each interval, calculating the proportion of the cumulative score of each interval in the cumulative scores of all the intervals, and sorting the intervals according to the proportion; and according to the score ratio of each interval and the distance between the intervals, determining the interval mining priority and the coal series gas development mode. The GIS technology-based coal-series gas longitudinal development interval optimization method is simple in step, reduces a large amount of repeated operation, achieves longitudinal coal-series gas interval optimization, has the advantages of being visual, vivid, rapid and efficient, and provides a more reliable basisfor coal-series gas exploration and development.

Description

technical field [0001] The invention belongs to the technical field of coal-measure gas geological area selection, and in particular relates to a GIS-based method for optimizing vertical development intervals of coal-measure gas. Background technique [0002] Coal-measure gas is an important part of unconventional natural gas in my country, and the exploration and development of coal-measure gas has become one of the hot spots in the energy field at the present stage. Coal Measure Gas refers to all kinds of natural gas existing in coal-measure strata, including coal-bed methane, tight gas and shale gas, also known as "three coal-measure gases". For details, see: Qin Yong. Research progress on co-generation and accumulation of coal-measure gas in China [J]. Natural Gas Industry, 2018, 38(4): 25-35; Qin Yong, Shen Jian, Shen Yulin. Co-production compatibility of superimposed gas-bearing systems—coal measures" Common geological problems in "three gases" and deep coalbed methan...

AI Technical Summary

Problems solved by technology

At present, there are few studies on the optimization of coal-measure gas intervals at home and abroad, and they only stay in the aspects of production layer compatibility evaluation and numerical simulation; it is difficult to apply to the intuitive judgment of coal-measure gas interval optimization; for details, see: Meng Shangzhi, Li Yong, Wang Jianzhong, et al. Feasibility analysis of "three gases" single wellbore co-production in coal measures (1)—Discussion based on field test wells [J]. Coal Journal, 2018, 43(1):168-174; Zhang Fenna, Zhang Hao, Qi Yaoguang, et al. Current status of co-mining technology and adaptability analysis in co-mining of coal-measure gas[J]. Journal of Coal Science, 2017, 42(S1): 203-208; Lin Haixiao. Coal based on damage theory Research on evolution law of fracture network in gas reservoir stimulation[D].Henan University of Technology, 2016

Images