歧口凹陷板桥斜坡滨Ⅰ油组有利储集相带分析  

Favorable Reservoir Facies Analysis of Bin Ⅰ Oil Formation in Banqiao Slope of Qikou Sag

作　　者：陈长伟[1] 韩国猛[1] 马建英[1] 胡瑨男[1] 王锦程[1] 

机构地区：[1]中国石油大港油田分公司,天津300280

出　　处：《特种油气藏》2017年第1期49-52,共4页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项"渤海湾盆地北部油气富集规律与增储领域研究"(2011ZX06005)

摘　　要：通过测录井、岩心、粒度分析等资料,综合研究了歧口凹陷板桥斜坡滨Ⅰ油组主要沉积相类型、富集高产相带及其展布规律。研究表明,歧口凹陷板桥斜坡滨Ⅰ油组以发育扇三角洲前缘为主,局部见远岸水下扇重力流沉积,可识别出水下分支河道(包括主水下分支河道、水下分支河道2种二级微相)、河口坝、席状砂、前缘远端滑塌浊积体等沉积微相。统计分析表明,不同沉积微相储集物性差异明显,对含油气性及油气产量具有明显的控制作用,其中,主水下分支河道砂岩单层厚度大、粒度粗、分选好、泥质含量低,储集物性好,含油气性好,油气产量高,是最有利的储集相带;水下分支河道、河口坝次之,席状砂、浊积体相对较差。该研究为油气勘探部署及井位优选提供了依据。Logging, mud logging, core analysis, grading analysis and other data are comprehensively used to iden- tify the major categories of sedimentary facies, high hydrocarbon enrichment and high production reservoir facies and its distribution in Bin I oil formation of＂ Qikou Sag Banqiao Slope. Research indicates that the Bin I oil formation in Banqiao Slope of Qikou Sag is dominated by fan-delta front with local development of infra-littoral underwater fan gravity-flow deposition. The identified sedimentary microfacies include underwater distributary channel （ inclu- ding main underwater distributary channel and underwater distributary channel） , mouth bar, sheet sand, front far iluxoturbidite, etc. Statistical analysis shows that there are great differences in physical reservoir properties of differ- ent sedimentary microfacies, which significantly control hydrocarbon potential and production. The major underwater distributary channel sandstone is considered as a favorable reservoir facies with large monolayer thickness, coarse granularity, better sorting, low shaliness, high reservoir quality, high hydrocarbon potential and high hydrocarbon production. The rest reservoir facies are considered as poor potential, such as underwater distributary channel, mouth dam, sheet sand and turbidite. This research could provide certain reference for hydrocarbon exploration de- ployment and well placement.

关 键 词：歧口凹陷 板桥斜坡 沉积微相 有利相带 

分 类 号：TE122.2[石油与天然气工程—油气勘探]