苏仁诺尔断裂在不同构造运动时期垂向开启程度及油气聚散关系  

Vertical open degree of Surennuoer fault in different tectonic movement periods and its relation with oil and gas vergency

作　　者：王泽哺[1] 

机构地区：[1]大庆油田有限责任公司井下作业分公司,黑龙江大庆163412

出　　处：《大庆石油学院学报》2008年第5期5-8,共4页Journal of Daqing Petroleum Institute

基　　金：国家"973"重点基础研究项目(2001CB209104)

摘　　要：在分析苏仁诺尔断裂发育特征及模拟古构造应力场的基础上,利用构造运动期间最大主压应力方向与苏仁诺尔断裂走向之间的夹角,对其在4次构造运动期间与大一段盖层内垂向开启程度进行了研究.结果表明,苏仁诺尔断裂在不同构造运动期间垂向开启程度是不同的,其西南部和东北部在同一构造运动期间垂向开启程度也不相同.研究苏仁诺尔断裂不同构造运动时期内的垂向开启程度与南一段源岩排烃史关系得到,伊敏组晚期的第3次构造运动正是南一段源岩大量排烃期,苏仁诺尔断裂垂向开启成为南一段源岩生成排出油气向南二段储集层运移的主要输导通道,且其在大一段盖层内的垂向开启程度不是很高,有利于油气在南二段内聚集与保存,是南二段油气富集成藏的一个重要原因.但此时期苏仁诺尔断裂东北部垂向开启程度明显低于西南部的开启程度,油气聚集和保存条件相对较好,这是造成苏仁诺尔断裂东北部油气较西南部更富集的一个重要原因.Based on the analysis of development characteristics of Surennuoer fault and recovering of ancient tectonic stress,vertical open degree of Surennuoer fault of K1d caprock in four tectonic movement periods was studied from the angle between the orientation maximum principal compressive stress and the strike direction of Surennuoer fault.The results show that the vertical open degree of Surennuoer fault is different in different tectonic movement periods,the vertical open degree in southwest of Surennuoer fault is different from that in northeast of Surennuoer fault.By the study of the relation between vertical open degree of Surennuoer fault in different tectonic movement period and the expulsion oil-gas history of K1n1 source rock,it was considered that the third tectonic movement occurring in the later of K2y sedimentation period was rightly the period of a lot of oil-gas expelled from K1n1 source rock.Vertical open of Surennuoer fault are the main transporting pathway of oil-gas migrating from K1n1 source rock to K1n2 reservoirs,and its open degree in K1d1 is not so high so that it is favorable for oil-gas to accumulate and preserve in K1n2.This is the important cause that there are a lot of hydrocarbon to accumulate in K1n2.But vertical open degree in southwest of Surennuoer fault is lower than that in northeast of Surennuoer fault in this tectonic movement period.The oil-gas accumulation and preservation conditions in southwest of Surennuoer fault are better than that in northeast of Surennuoer fault.This is the important reason why there are more industrial oil-gas accumulations in southwest of Surennuoer fault than in southeast of Surennuoer fault.

关 键 词：苏仁诺尔断裂 构造运动时期 垂向开启程度 油气富集 油气聚散 

分 类 号：TE122.1[石油与天然气工程—油气勘探]