准噶尔盆地四棵树凹陷沙湾组储集层评价  

Evaluation of Shawan Reservoir in Sikeshu Sag in Junggar Basin

作　　者：王振奇[1] 杨凡[1] 姜雪[1] 赵亮[1] 程欣[1] 

机构地区：[1]长江大学地球科学学院,武汉430100

出　　处：《新疆石油地质》2014年第1期12-16,共5页Xinjiang Petroleum Geology

摘　　要：准噶尔盆地四棵树凹陷沙湾组储集层岩性多为中-细砂岩,局部地区可见砾岩,储集空间以原生孔隙为主,局部地区发育次生孔隙。通过压汞曲线特征和薄片鉴定对沙湾组储集层喉道进行了分类研究,沙湾组储集层多发育Ⅲ类和Ⅳ类喉道。将地球物理测井与数学方法相结合,建立孔隙度模型,与单一测井参数建立的模型相比,相关系数提高幅度达20%.在此基础上,对储集层的物性特征与沉积微相的关系进行了研究,认为储集层的物性与沉积微相存在一定联系,以辫状河三角洲分支河道和扇三角洲为优势相带,该相带发育的砂体物性较好。结合物性、孔隙结构和沉积相对研究区储集层类型进行划分和评价,研究区储集层物性总体较好,多为Ⅱ、Ⅲ类储集层。The lithology of Shawan reservoir in Sikeshu sag in Junggar basin is mostly medium-fine sandstone,conglomerate in some areas.The reservoir space is dominated by primary porosity,with secondary pores in local areas.The pore throat types of Shawan formation were mainly classified as Type Ⅲ and Type Ⅳ by the characteristics of mercury injection curves and the appraisal of thin-sections.The porosity model is established by geophysical well logging and mathematical methods.Compared with the model developed by single well logging parameters,the correlation coefficient of the new model can be improved by 20％,based on which the study of relation between the petrophysical properties and sedimentary microfacies indicates that both do have certain relationship.The branch channel of braided river delta and fan delta are advantageous facies with good physical properties of the sands.According to the physical property,pore structure and sedimentary facies,the reservoir type in the study area is classified as Type Ⅱ and Type Ⅲ,and evaluated that Shawan reservoir is of good petrophysical property at the whole.

关 键 词：准噶尔盆地 四棵树凹陷 沙湾组 储集层物性 孔隙结构 沉积相 

分 类 号：TE112.24[石油与天然气工程—油气勘探]