陕北斜坡东部李家岔探区高含水油藏成因分析  

Analysis of the genesis of the water-rich oil reservoir in the Lijiacha prospect area in the east of the northern Shaanxi slope

作　　者：时保宏[1] 赵靖舟[2] 孟祥振 罗然昊 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]西安石油大学油气资源学院,陕西西安710065 [3]延长油田股份公司,陕西延安717200

出　　处：《中国地质》2007年第3期445-449,共5页Geology in China

基　　金：国家重点基础研究发展计划(973)项目(2003CB214607);教育部长江学者和创新团队发展计划项目(IRT0559)资助

摘　　要：本文通过101口井的试油和产量数据统计分析,总结了陕北斜坡东部李家岔探区油藏含水率的平面和纵向变化规律,并探讨了其高含水原因。研究区含水率有北部高、南部低,中间低、东西高的特征;含水率在纵向上有从下往上变低的趋势。通过烃源岩条件、物性条件及与相邻油田的对比分析,认为油源不足是李家岔探区油藏高含水的最主要原因,运移条件差是高含水的重要原因,低孔、低渗的储层条件也是高含水的原因之一。On the basis of the statistic analysis of the oil tests and data of production of 110 wells in the study area, the paper summarizes the areal and vertical variations of oil content in the Lijiacha prospect area in the east of the northern Shaanxi slope and discusses the cause of the high water content. The water content in the study area is high in the north, low in the south, low in the center and high in the east and west and vertically has the trend of becoming low from the base upward. According to the source rock and physical conditions and a comparative study of these conditions with neighboring areas, the authors think that： the lack of hydrocarbon is the most important cause for the high water content in the oil reservoir of the Lijiacha prospect area, the poor migration conditions are an important cause and the low-porosity and-permeability reservoir conditions are also one of the causes for the high water content.

关 键 词：特低渗透油藏 含水率 延长组 李家岔 

分 类 号：P618.13[天文地球—矿床学]