新疆马朗凹陷油气二次运移模式及其勘探意义  

The pattern of secondary hydrocarbon migration and its implication for hydrocarbon exploration in Malang sag of Santanghu basin,Xinjiang,China

作　　者：黄福喜[1] 陈洪德[1] 王茂显[2] 张宏[2] 陈旋[2] 

机构地区：[1]成都理工大学沉积地质研究院,成都610059 [2]吐哈油田分公司勘探开发研究院,新疆哈密839009

出　　处：《成都理工大学学报（自然科学版）》2009年第4期379-386,共8页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：针对三塘湖盆地马朗凹陷的石油地质特征,在石油地质分析化验资料及研究成果的基础上,根据油气二次运移的一般模式特征,采用动、静态结合、单项与多项结合的研究方法分析油气二次运移特征。结果表明,上二叠统芦草沟组泥质烃源岩在晚侏罗世开始大量成熟排烃;具有早白垩世末期和晚白垩世末期两次成藏关键时期;以断层、不整合面、裂缝与连通性地层为运移通道,以垂向运移、短距离运移、源内聚集为主,侧向运移为辅的油气运聚特征。油气二次运移模式表现为:中、新生界以背斜、断背斜、岩性型聚集模式为主,上古生界以断块、断阶、地层型聚集模式为主。研究成果经实践证明在勘探中具有重要的指导性。According to the character of secondary hydrocarbon migration of a general model and on the basis of a large amount of sampling test data, this paper adopts the dynamic analysis and synthetical study method combining dynamic state with static state and combining single item with multiple items to study the characteristics of secondary hydrocarbon migration in the Malang sag of the Santanghu basin of Xinjiang. By analysing a large amount of hydrocarbon expulsed from Upper Permian Lucaogou Formation muddy source rocks matured in Late Jurassic, there are two key episodes of oil and gas accumulations recognized in the study area, including the ends of Early Cretaceous and Late Cretaceous. The faults, unconformity surfaces, fractures and communicating formations can serve as migration pathways, and the dominant way of hydrocarbon migration and accumulation is vertical and short distance migration in the hydrocarbon source region and lateral migration is a subsidiary way. The major characteristics of secondary hydrocarbon migration modes in the Malang sag are that anticline, faulted anticlines and lithologic type are the dominant migration modes in Mesozoic-Cenozoic Erathem, and that fault block, fault terrace and stratigraphie type are the dominant ones in Late Paleozoic. The practice indicates that the pattern of secondary hydrocarbon migration is of important significance for petroleum exploration.

关 键 词：三塘湖盆地 马朗凹陷 油气二次运移 特征 模式 

分 类 号：TE122.12[石油与天然气工程—油气勘探]