柴北缘马西地区油气地质特征与成藏研究  

Geologic characteristics and hydrocarbon accumulation in western Maxi Area on the northern margin of Qaidam Basin

作　　者：王兴宏[1] 张庆丰[2] 操红梅[1] 

机构地区：[1]长庆油田公司油气工艺研究院,陕西西安710018 [2]青海油田边远油田开发公司,青海敦煌736202

出　　处：《断块油气田》2009年第3期11-13,共3页Fault-Block Oil & Gas Field

基　　金：中国石油天然气股份有限公司重大专项“柴达木盆地油气勘探开发关键技术研究”(07-01Z-01-04)资助

摘　　要：马海油气田的勘探取得突破对于青海油田的石油地质勘探具有重要意义。马西地区位于马海构造西部,为燕山晚期发育的古隆起,储层为河流相沉积的碎屑岩,较为发育。该区是以周边凹陷的侏罗系为烃源岩的含油气区,古凸起为油气运移聚集的长期指向区,油源对比发现其大部分来自于北带鱼卡凹陷的J2含油气系统,少部分来自于南带伊北凹陷的J1含油气系统,并且圈闭的形成、定型时期与其生烃高峰期具有良好的匹配关系。因此,盖层的发育程度对于工区油气藏的规模至关重要。The breakthrough of Mahai oil and gas field is very important for exploration of Qinghai Oilfield. The Maxi Area is located in western Mahai Region and is a palaeohigh developed at late stage of Yanshan. The reservoir is composed of well-developed clastic rock in river facies. The oil sources come from Jurassic eircumjacent sags and the palaeohigh is the long time directional area for oil and gas migration. Through the oil sources contrast, we can conclude that the majority of oil sources come from the northern oily system of J2 and the minority come from the southern oily system of Ji. There is good matching relationship between the formation time of trap and the oil-forming peak. So the development degree of cap bed is very important for the scale of reservoir forming.

关 键 词：古凸起 油气成藏特征 油源对比 马西地区 柴达木盆地北缘 

分 类 号：TE122.1[石油与天然气工程—油气勘探]