玛北斜坡百口泉组沉积相与有利储层分布  

Sedimentary Facies and Favorable Reservoir Distribution in Baikouquan Fm in Mabei Slope

作　　者：袁晓光[1] 李维锋[1] 张宝露[1] 韩登林[1] 许宏龙[1] 

机构地区：[1]长江大学,湖北武汉430100

出　　处：《特种油气藏》2015年第3期70-73,154,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金"库车坳陷露头剖面断层带砂岩成岩改造分异特征研究"(41302094);中国石油天然气股份有限公司新疆油田分公司重大专项"玛湖北斜坡区百口泉组岩石特征精细研究和储层分类评价"(2014-MH-511)联合资助

摘　　要：针对玛北斜坡百口泉组目前存在的沉积相认识不统一、内部微相划分不精细及有利储层分布认识不清等问题,通过岩心及薄片观察,结合测录井及试油资料,进行沉积相及有利储层分布预测研究。结果表明:百口泉组沉积相为扇三角洲相而非冲积扇相,可识别出10个微相类型。其中,重力流成因的泥石流、碎屑流微相的识别尤为重要;扇面河道和水下分流河道微相的砂砾岩、砂岩属于牵引流成因,物性最佳,为有利储层分布区域;而泥石流和碎屑流微相的砂砾岩属于重力流成因,泥质杂基含量高,物性很差。该研究将为百口泉组后续的评价、开发提供新的地质依据,也可为邻区甚至国内其他扇三角洲发育区的油气勘探评价提供借鉴。For the exploration of the Baikouquan Fm in Mabei Slope,some issues exist,such as inconsistent cognition on sedimentary facies,non-fine inside micro-facies classification,and unclear distribution of favorable reservoir. Accordingly,in this paper,by observing cores and thin slices,and combining well logging,mud logging and west testing data,sedimentary facies and distribution prediction of favorable reservoirs were studied. The results show that sedimentary facies in the Baikouquan Fm is fan delta,not alluvial fan; ten types of micro-facies can be identified. Specifically,the identification of mud-rock flow and debris flow micro-facies generated by gravity flow are especially important. Gravels and sandstones in micro-facies of fan channels and underwater distributary channels belong to traction current genesis,have best physical properties and are favorable areas of reservoir distribution; while gravels in mud-rock flow and debris flow micro-facies belong to gravity current genesis,with high argillaceous matrix content and very poor physical properties. This study can provide new geological foundation for further evaluation and development of the Baikouquan Fm,and also can provide reference for hydrocarbon exploration and evaluation in adjacent areas and even other fan deltas in China.

关 键 词：玛北斜坡 百口泉组 扇三角洲 沉积微相 重力流 有利储层 

分 类 号：TE122.2[石油与天然气工程—油气勘探]