鄂尔多斯盆地沿河湾区长2、长6储层特征及控油性研究

发布时间：2018-03-20 15:13

  本文选题：鄂尔多斯盆地　切入点：沿河湾区　出处：《西安石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：沿河湾油区位于鄂尔多斯盆地伊陕斜坡中部,属于延长油田上产区块。研究区油藏储层主要为三叠系延长组长2和长6油层组。在岩石薄片、铸体薄片、扫描电镜和压汞资料分析的基础上,确立了该区长2和长6储层主要以细粒岩屑长石砂岩为主,物性较好,储层的孔隙类型主要为残余粒间孔、浊沸石溶蚀粒间孔和长石粒内溶孔。研究区长2油层组储层以Ⅰ类为主,储层储集性能较好；长6油层组储层则主要以Ⅳ类为主,岩性比较致密,储集性能较差。长2和长6储层分别为三角洲平原分流河道、三角洲前缘水下分流河道沉积,油气均主要分布于分流河道和河口坝沉积砂体中,平面上呈北东—南西向条带状分布。该区油气成藏主要控制因素有岩性、构造和遮挡三大因素,其中长2油藏为远源聚集型成藏模式,而长6油藏为近源聚集型成藏模式。本文通过深入研究其储层特征及油气控制因素,为该区今后的勘探开发指明了一定方向。
[Abstract]:The Yanhewan oil area is located in the middle of the Yishan slope in Ordos Basin, which belongs to the upper producing area of Yanchang Oilfield. The reservoir reservoirs in the studied area are mainly the formation of Chang 2 and Chang 6 of the Triassic Yanchang formation. Based on the analysis of scanning electron microscope and mercury injection data, it is established that the reservoirs of Chang 2 and Chang 6 in this area are mainly fine lithic feldspathic sandstone with good physical properties, and the pore types of reservoirs are mainly residual intergranular pores. In the study area, the reservoir of Chang 2 reservoir is mainly type I, and the reservoir performance is good, while the reservoir of Chang 6 reservoir group is mainly type 鈪，

本文编号：1639635