陕北富县地区马五段上部碳酸盐岩储层非均质性特征

发布时间：2018-06-02 01:40

本文选题：碳酸盐岩 + 储层　；参考：《西安石油大学》2015年硕士论文

【摘要】：本文研究层段为陕北富县地区奥陶系马家沟组马五4?马六段,储层的非均质性很强,己成为影响勘探和生产的主要地质因素。本次以野外露头剖面、岩心观察为基础,结合钻井、录井资料,以标志层为等时面,沉积旋回控制与电测曲线特征结合,对马五广马六段进行了地层划分与对比。运用薄片鉴定、阴极发光、扫描电镜、电子探针、微量元素等实验手段,总结了研究区的岩石学特征、物性特征、成岩作用、孔隙类型及结构特征,进行了储层微观和宏观非均质性评价及控制因素分析。研究表明,研宄区马家沟组的马五4-马五3地层保存较为完整,马五2-马六段剥蚀严重仅中部的FG2井、东北部的XF4井周边局部保存哥A段:储集层石石以角碌z?石、砂砾屑云岩、细晶-泥晶云岩等白云岩为主;储集空间以晶间孔、晶间溶孔、膏模孔为主,马五!亚段溶孔发育:将鄂尔多斯盆地马家沟组孔隙结构划分为14小类,并建立了微观非均质性评价参数FJZ?本区以中孔细喉单峰和多峰型孔隙结构为主,微观非均质性中等较强;目的层段的储层突进系数、变异系数和连通性等参数均表明其层内、层间和平面具极强的非均质性;成岩和构造作用是影响储层非均质性的主要作用。
[Abstract]:The study layer in this paper is Mawuang4 of Ordovician Majiagou formation in Fuxian area of northern Shaanxi. The reservoir heterogeneity is very strong and has become the main geological factor affecting exploration and production. On the basis of outcrop profile and core observation, combined with drilling and logging data, taking indicator layer as isochronous plane, combining sedimentary cycle control with characteristics of electric logging curve, stratigraphic division and correlation of the sixth member of Mawuguangma formation are carried out. The petrological characteristics, physical properties, diagenesis, pore types and structural characteristics of the study area were summarized by means of thin plate identification, cathodic luminescence, scanning electron microscope, electron probe and trace elements. Reservoir microcosmic and macroscopic heterogeneity evaluation and control factor analysis were carried out. The results show that the Mawu4-Ma 53 formation of Majiagou formation in the study area is relatively intact, and the denudation of Ma Wu 2-Ma 6 formation is serious only in the central part of FG2 well, and the part of XF4 well in the northeast preserves GE A member: reservoir stone and stone are preserved in Jiao Lu zh? Stone, gravel dolomite, fine crystal-mudstone dolomite and other dolomite; storage space to intergranular pore, intergranular solution pore, mold hole, Ma Wu! The pore structure of Majiagou formation in Ordos Basin is divided into 14 subgroups, and the microcosmic heterogeneity evaluation parameter FJZ? In this area, the pore structure is dominated by single peak and multi-peak pore structure with medium microcosmic heterogeneity, and the reservoir penetration coefficient, variation coefficient and connectivity of the target section all indicate the heterogeneity of the interlayer and interlayer peace mask. Diagenesis and tectonism are the main factors affecting reservoir heterogeneity.
【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

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