孤北东地区成藏动力学系统研究  

Hydrocarbon Accumulation Dynamic Systems in the East of Gubei Area

作　　者：魏泽典[1] 田世澄[1] 李永根[1] 陶宗普[1] 张永旺[1] 

机构地区：[1]中国地质大学(北京)能源学院,北京100083

出　　处：《石油天然气学报》2005年第S3期18-20,5,共4页Journal of Oil and Gas Technology

摘　　要：根据欠压实带和孔隙流体压力特征,孤北东地区分为6个成藏动力学系统。孤北洼陷主要发育沙四段、沙三段、沙一段3套烃源岩,通过单井成藏演化史图确定了各层的成藏期。连络体系在研究区油气成藏中具有重要的作用,主要连络体系有断层、不整合面、盆地边缘岩性岩相变化带。孤北洼陷运移来的油气直指几个山梁,特别是渤3井山梁。东北部油气源相对较少,局部地区油气难以到达。沙河街组中、下部的自源高压成藏动力学系统有利于隐蔽圈闭的成藏。According to the characters of undercompaction belt and porous fluid pressure,six hydrocarbon accumulation dynamic systems are divided in the east of Gubei area.Three main sets of source rocks in Gubei sub-depression are yielded,Es_3 and Es_1 of Shahejie Formation and hydrocarbon accumulation ages of the three sets of source rocks are determined with hydrocarbon accumulation history diagram of a single well.In this area,transport systems are especially important during the hydrocarbon accumulation process and the main transport systems are faults,unconformities and transformation belts of lithology and lithofacies at the basin edge.Ridges,especially the ridge of Well Bo 3,are primary petroleum migration targets,but in the northeast of the study area,petroleum sources are less and even rare in some local areas.The hydrocarbon accumulation dynamic systems in the middle part and lower part of Shahejie Formation,which are self-sourced and high-pressure,are in favor of hydrocarbon accumulation of subtle traps.

关 键 词：济阳坳陷 烃源岩 成藏期 油气运移 隐蔽圈闭 

分 类 号：P618.13[天文地球—矿床学]