二连盆地赛汉塔拉凹陷边界断裂构造特征及其控藏作用

发布时间：2018-07-14 18:49

【摘要】：为了研究赛汉塔拉凹陷的形成、演化及油气成藏规律,利用地震、钻井、测井等资料对边界断层锡林断裂构造特征进行了分析,并探讨了边界断裂构造对油气成藏的控制作用。结果表明,锡林断裂具有明显的分段性,不同段其断面形态存在差异,表现为中段断面相对陡倾,南、北段则相对平缓。由平均断裂活动速率可知,阿尔善组和腾格尔组沉积期是锡林断裂的强烈活动期。锡林断裂的形成与演化对油气成藏具有控制作用,具体表现为:①断裂活动控制生烃洼槽及优质烃源岩的形成,并促进烃源岩的热演化;②断裂活动控制砂体展布,并形成多种类型的圈闭;③断裂、砂体和不整合面共同构成了油气运移的输导格架。因此,生烃洼槽周边受锡林断裂控制而形成的圈闭是油气聚集的有利场所。
[Abstract]:In order to study the formation, evolution and hydrocarbon accumulation law of Saihantala Sag, the structural characteristics of Xilin fault along the boundary fault are analyzed by using seismic, drilling and logging data, and the controlling effect of boundary fault structure on oil and gas accumulation is discussed. The results show that the Xilin fault has obvious segmental character, and the cross-section morphology of different segments is different, which shows that the middle section is relatively steep, while the south and north sections are relatively flat. According to the average rate of fault activity, the sedimentary period of Alshan formation and Tengger formation is the strong active period of Xilin fault. The formation and evolution of Xilin fault have a controlling effect on oil and gas accumulation, which is manifested in the formation of hydrocarbon generating troughs and high quality source rocks controlled by the activity of Wei 1 fault, and the thermal evolution of source rocks and the control of sandbody distribution by the thermal evolution of hydrocarbon source rocks. Various types of traps and faults are formed, and sand bodies and unconformities form the framework of oil and gas migration. Therefore, the trap formed by the Xilin fault around the hydrocarbon-generating depression is a favorable place for oil and gas accumulation.
【作者单位】：中国石油华北油田分公司地球物理勘探研究院;中国石油大学(北京)地球科学学院;西北大学大陆动力学国家重点实验室;中国石油大学(北京)油气资源与探测国家重点实验室;
【基金】：中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用”(编号:2014E-35)资助
【分类号】：P618.13

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