论文部分内容阅读
综合测井、录井、物性分析、地层水和地球化学等资料,在现代油气运移理论的基础上,从宏观与微观、平面与剖面等方面,研究了准噶尔盆地车排子周缘白垩系清水河组砂体的油气输导特征.清水河组发育扇三角洲分流河道砂体,顺物源的北西-南东方向连通性好,垂直物源方向的砂体受河道间泥岩的阻隔,连通性较差,底部发育一套连续稳定的砂砾岩是油气的优势运移通道.清水河组砂体主要为方解石胶结,处于中成岩阶段,发育较多溶孔,孔隙度均值为17.6%,为高孔中喉特征,微观连通性好.清水河组砂体地层水水型相同,均为NaHCO_3型,证实砂体的连通性好.来自沙湾凹陷深部的二叠系油气经断裂和不整合面运移至白垩系后,沿清水河组砂体从凹陷向凸起、由东南向西北部运移.综合多种因素分析,建立了清水河组砂体的油气输导模式.
Based on the theories of modern hydrocarbon migration, comprehensive logging, well logging, physical property analysis, formation water and geochemistry data, based on the theory of modern hydrocarbon migration, the Cretaceous fresh water on the periphery of Che Pai in the Junggar Basin was studied from macroscopic, microscopic, The Qingshuihe Formation developed distributary channel sand bodies in Fan Delta, the syn-provenance has good connectivity in the NW-NS direction, and the sand bodies in the direction of vertical provenance are obstructed by the mudstone between the channels, and connectivity And a set of continuous and stable glutenite at the bottom is the predominant migration channel of oil and gas.The Qingshuihe formation sandstone is mainly calcite cementation, is in the diagenetic stage and develops more dissolved pores, the average porosity is 17.6%, which is high Pore throat characteristics, good micro-connectivity.The Qingshuihe formation sand water has the same water type, which is of the type of NaHCO 3, confirming the good connectivity of the sand body.The Permian oil and gas from the deep part of the Shawan sag has been characterized by the faults and unconformities After migrating to the Cretaceous, the sand bodies along Qingshuihe Formation migrated from the depression to the northeast to the northwest, and integrated the various factors to establish the oil and gas transport model for the Qingshuihe Formation sand body.