乌尔逊凹陷北部苏仁诺尔断裂带在大一段垂向封闭性演化及其研究意义  

Vertical seal evolution of Surennuo-er fault zone (K_1d_1) and its significance in the north of Wuerxun Depression

作　　者：付广[1] 刘江涛[1] 

机构地区：[1]大庆石油学院,黑龙江大庆163318

出　　处：《油气地质与采收率》2006年第4期4-7,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家"973"重点基础研究项目"高效大气田形成机理与分布研究"(2001CB209104)资助

摘　　要：为了研究乌尔逊凹陷北部苏仁诺尔断裂带在大一段的垂向封闭性演化,在分析其发育及活动特征的基础上,利用断裂面压力和断裂带中泥质含量研究了其垂向封闭性。结果表明,该断裂带在大一段内均垂向封闭,且分布于整个空间。苏仁诺尔断裂带在大一段的垂向封闭性演化分析表明,乌39号断裂和乌76号断裂分别于伊敏组沉积末期和青山岗组沉积早期开始形成垂向封闭性,之后随埋藏深度增加,断裂面压力增大,断裂带垂向封闭性逐渐增强。苏仁诺尔断裂带在大一段内的垂向封闭性有利于油气在南二段的聚集与保存;断裂带的垂向封闭形成时期与烃源岩大量排烃期的匹配关系较好,有利于油气大规模富集成藏。In order to study on the evolution of vertical seal of Surennuoer fault zone ( K1 d1 ) in the north of Wuerxun Depression, the authors analyzed the pressure on the fault surface and mudstone content in the fault zone based on its development and activities. The vertical fault zone seals in all K1 d1 and distributes in the whole space. The pressure on the fault surface in different geological periods and activity history of the fault zone were applied to the study on evolution history of the vertical seal of Surennuoer fault zone in K1 d1. The vertical seal of fault Wu39 and fault Wu76 was formed at the end of K2y and early K2q sedimentation stages. After these stages, the vertical seal of the fault zone increases with the increment of the pressure on the fault surface and buried depth. The relationship between the vertical seal of Surennuoer fault zone(K1d1) and the formation and distribution of oil-gas reservoirs shows that the vertical seal of Surennuoer fault zone in K1d1 is favorable for oil-gas accumulation and preservation in K1 n2. The correlation between the formation of the vertical seal of Surennuoer fault zone and oil-gas expelling from source rocks isgood, and it is favorable for oil-gas accumulation and reservoir formation on a large scale.

关 键 词：大一段 垂向封闭 断裂面压力 泥质含量 苏仁诺尔断裂带 

分 类 号：TE112.21[石油与天然气工程—油气勘探]