摘要
在对碎屑岩岩石学特征、成岩作用及成岩阶段划分的基础上 ,对北塘凹陷沙三段各砂体的储集物性进行了综合评价 ,并对影响储集物性的主要因素进行了详细探讨。在全面评价的基础上认为 :塘沽、新村、新河村地区构造圈闭数量多 ,圈闭发育完整 ,圈闭面积大 ,该区位于凹陷的沉积和生油中心 ,油源条件有利。从储集层角度看 ,该区主要发育 3个有利储集相带。新河村地区发育扇三角洲分流河道 ,埋藏浅 ,岩性粗 ,储集相带最为有利。新村—塘沽西发育滑塌浊积砂体 ,埋藏中等 ,砂层发育 ,储集层物性较好。炮台地区发育滩坝砂和席状砂 ,虽然埋藏深 ,岩性较细 ,但分选好 ,加之发育高压异常带 ,仍保持较好的储集层物性。图 2表 2参 3 (邹冬平摘 )
On the basis of lithological characters, diagenesis, and the division of diagenetic stage, the petrophysical properties of sandbodies in Es 3, Beitang sag are evaluated comprehensively, and main factors affecting the petrophysical properties are dealt with in detail. Based on an overall evaluation, it is recognized that: in Tanggu, Xincun, Xinhecun regions there are numerous traps which developed rather completely, and the area of each trap is relatively large. These regions are located in the sedimentary centre and centre of oil generation (a favorable oil source). Viewed from reservoir beds, there are 3 favorable facies belts. ①Fan delta distributary channels developed in Xinhecun region, where reservoir formations are rather shallow and have a relatively course facies belts; thus, this will be the most favorable reservoir facies belt. ②In Xincun and western Tanggu: sliding and collapse turbidites were created and moderately buried, where sandbodies relatively developed, and fairly good petrophysical properties occurred. ③In Paotai region: beach bar sandbodies and sheet sandbodies formed, though deeply buried, and with fine lithology, but they have a relatively good sorting and abnormally high pressure belt developed, thus fairly good petrophysical properties are still retained.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
1999年第6期36-38,共3页
Petroleum Exploration and Development
关键词
储集层
沉积
成岩作用
相带预测
Reservoir, Evaluation, Prediction, Clastic rock Diagenesis, Huanghua depression
