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在美国阿拉巴马州煤层气田中,薄皮构造(Thin-skinned structures)普遍发育,影响着煤层中气体和水的产量。Deerlick Creek气田和Cedar Cove气田中发育拉张构造,包括正断层及其上盘逆牵引构造;而Gurnee和Oak Grove气田中发育挤压褶皱。这些都被解释为不同地层滑脱面之上发育的滑脱褶皱。从气、水产量平面展布图,可以看出构造样式,且可进一步指明:褶皱与断裂作用影响着煤层气储层的渗透率分布以及脱气工作成功与否。
Thin-skinned structures are widespread in the Alabama coal-bed gas field and affect the production of gas and water in the coal seam. Tensile structures are developed in Deerlick Creek and Cedar Cove gas fields, including normal faults and their reverse traction structure on the upper plate; compression folds are developed in the Gurnee and Oak Grove gas fields. These are interpreted as the development of slip stratification over different strata. From gas and water production plane map, it can be seen structural style, and further instructions: fold and fracture affect the permeability of coalbed methane reservoir distribution and the success of degassing work.