摘要
分析克拉玛依油田六中区克下组沉积环境,指出不同沉积微相储集性能与含油性之间关系,为后期开发调整提供依据.研究野外露头、岩心及化验资料等,在确定研究区沉积环境基础上,分析沉积微相展布特征,指出沉积微相与含油性之间关系.结果表明:研究区为以辫状河为主的冲积扇,主要发育扇中和扇缘亚相,依据各微相类型的岩性、沉积构造及测井曲线形态等特征,将扇中亚相分为辫流水道、辫流砂岛和漫流带等微相,扇缘亚相分为径流水道和泛洪带微相.不同沉积旋回内沉积微相的空间展布规律:下部中期旋回砂体呈连片状,厚度大,延伸范围广;中部中期旋回砂体以宽带状为主,厚度较薄,延伸范围较窄;上部中期旋回砂体以窄条带状为主,厚度薄,延伸范围窄.储层物性稍差的侧缘—漫流带及砂体井控程度较低的窄条带状砂体是剩余油挖潜的主要对象.
Distributional characteristics of sedimentary facies was studied through the analysis of field outcrop, cores and test data in order to analyze sedimentary environment of Liuzhong district in lower Kelamayi reservoir. This paper points out relationship between reservoir property of sedimentary facies and oiliness, provides basis for development adjustment. The sedimentary facies of study area consists of alluvial fan which is mainly middle fan and fan fringe. Middle fan parfacies is divided into water way, braided stream sand island and sheetflood area based on lithology, structure and log presentation. Fan fringe parfacies is divided into runoff waterway and flood spillway. Distributional regulation of microfacies in sedimentary cycle was pointed out. Sandbody in lower part of cycle is continuous, and the sandbody is thick and extensive. Sandbody in middle part of cycle is mainly wideband shape, and the sandbody is thin and narrow. Sandbody in upper part of cycle is mainly strip shape, and the sandbody is thin and narrow. Sheetflood area with poor physical property and strip shape sandbody with low well control degree is the main object to excavate remaining oil.
出处
《大庆石油学院学报》
CAS
北大核心
2011年第6期22-27,123-124,共6页
Journal of Daqing Petroleum Institute
基金
教育部博士点新教师基金(20090007120003)
关键词
沉积微相
冲积扇
岩石相
克拉玛依油田
六中区
克下组
含油性
sedimentary microfacies
alluvial fan
rockfacies
Kelamayi Oilfield
Liuzhong zone
Kexia group
oiliness
