FRACTURE CHARACTERISTICS OF UPPER PALEOZOIC AND ITS INFLUENCE ON GAS AND WATER DISTRIBUTION ON THE NORTHERN SECTION OF THE TIANHUAN DEPRESSION, ORDOS BASIN
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摘要:
针对鄂尔多斯盆地天环坳陷上古生界裂缝的类型、成因及分布开展野外露头、岩心宏观及镜下微观裂缝的观察、描述与测量，并结合成像测井分析等资料，明确构造裂缝系统对气水分布的控制作用。研究结果证实鄂尔多斯盆地天环坳陷北部地区上古生界地层发育了不同组系、规模、力学性质及不同产状的构造裂缝系统，构造裂缝系统是研究区天然气发生垂向运移的主要通道。构造裂缝发育的差异性对气水分布起到了一定的调整作用，是导致研究区气、水分布复杂化的主要原因。
Abstract:In connection with types, causes and distributions of the upper Paleozoic fracture in the Tianhuan Depression, Ordos Basin, observations, descriptions and measurements of outcrops, core macroscopic and microscopic microcracks were carried out. Combined with the analysis of logging logs, the results show that tectonic fracture system with different groups, sizes, mechanical properties and structures was developed in the upper Paleozoic strata in the northern part of the Tianhuan Depression, Ordos Basin and it has the control effects on the gas and water distribution. The tectonic fracture system is the main channel for the vertical migration of natural gas in this area. The individual differences of tectonic fractures play a certain role in regulating the distribution of gas and water, which is the main reason for the complicated gas and water distribution in this area.
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