吴起吴仓堡地区延安组延10油层组地质特征研究

发布时间：2018-03-26 18:28

本文选题：延安组　切入点：储层　出处：《西安石油大学》2015年硕士论文

【摘要】：本文以石油地质学、沉积岩石学和储层地质学等理论为指导,以实验测试技术为依托,综合应用钻井、测井及生产动态资料,从沉积相和砂体展布研究入手,对延10储层的岩石学特征、物性特征、孔隙结构特征以及宏观非均质性进行了研究和分析,取得了以下成果和认识。根据岩心观察、沉积构造及测井相分析表明,延10期主要发育曲流河相,主要包括河道滞留、边滩、天然堤、决口扇、泛滥平原等微相沉积。通过岩心描述及岩石薄片鉴定,研究区延10油层组储层主要为灰色、灰白色粗粒长石岩屑砂岩,砂岩的成分成熟度和结构成熟度均较低。根据常规物性资料分析,延101储层的平均孔隙度为9.63%,平均渗透率为8.94×10-3μm2;延102储层砂岩平均孔隙度为9.97%,平均渗透率为7.02×10-3μm2;延103储层砂岩平均孔隙度为9.43%,平均渗透率为6.08×10-3μm2。本区延10油层组砂岩储层孔隙类型主要为粒间孔,总面孔率为3.7%;其次为粒内孔、铸模孔、长石溶孔,三者总面孔率为4.5%,各类孔隙所占的总面孔率平均值为7.5%。研究区延101~延103储层砂体间存在较明显的差异,其中102砂岩密度最大,说明其砂体发育程度最优,其次为延103,101的砂岩密度最小。延10储层各个小层层间非均质性均相对较弱。
[Abstract]:Under the guidance of the theories of petroleum geology, sedimentary petrology and reservoir geology, and based on experimental test technology, this paper comprehensively applies drilling, well logging and production dynamic data to study the distribution of sedimentary facies and sand bodies. The petrological characteristics, physical properties, pore structure characteristics and macroscopic heterogeneity of Yan 10 reservoir are studied and analyzed, and the following results and understandings are obtained. According to core observation, sedimentary structure and log facies analysis show that, The meandering river facies are mainly developed in Yan10 period, including channel retention, banks, natural levees, crevasse fans, flood plains and other microfacies. Through core description and identification of rock thin sections, the reservoir of Y10 oil formation in the study area is mainly gray. The grayish white coarse feldspathic sandstone has low compositional maturity and structural maturity. The average porosity of Yan 101 reservoir is 9.63, the average permeability is 8.94 脳 10 -3 渭 m 2, the average porosity of Yan 102 sandstone is 9.97, the average permeability is 7.02 脳 10 -3 渭 m 2, and the average porosity of Yan 103 sandstone is 9.43 and the average permeability is 6.08 脳 10 -3 渭 m 2. The pore type is mainly intergranular pore. The total face rate was 3.7, followed by the intragranular pore, mold hole, feldspar solution pore, the total face rate of the three groups was 4.5 and the average of the total porosity was 7.5. There were obvious differences between the sand bodies of 101-Yen103 reservoirs in the study area, among which the density of 102 sandstone was the largest. The results show that the sand body has the best development degree, the sandstone density of Yan 103101 is the lowest, and the heterogeneity among the small layers of Yan 10 reservoir is relatively weak.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.13

【引证文献】