苏里格气田A区马家沟组马五段储层特征及测井评价

发布时间：2018-04-01 11:25

  本文选题：苏里格气田　切入点：A区块　出处：《西南石油大学》2017年硕士论文

【摘要】：位于鄂尔多斯盆地北部的苏里格气田,是我国特大型气田,其下古生界马家沟组储层为典型的碳酸盐岩储层。本文以苏里格气田A区块为研究对象,对马家沟组主力气层马五段进行储层特征及测井评价研究,为后续研究区储层评价及开发提供依据。在综合利用岩心资料、测井资料以及地质资料的基础上,本文从岩石学特征、物性特征和储集空间类型三个方面对马家沟组马五段的储层特征进行了研究,发现马五段储层岩石类型以白云岩为主;储集空间主要有晶间孔、溶孔、晶间溶孔等;储层整体具有低孔、低渗的特征。依据岩心、薄片以及测井等资料对马家沟组储层的沉积相、沉积微相的研究表明,马家沟组储层常发育层理、鸟眼构造、结核等沉积构造,属潮坪亚相;沉积微相类型主要有云坪、灰云坪、泥云坪等。利用研究区储层岩心物性分析数据和测井资料建立了适合研究区碳酸盐岩储层的泥质含量模型、孔隙度模型、渗透率模型和饱和度模型,通过模型检验,精度高,具有良好的适用性。采用经验统计法和交会图法相结合确定了储层的物性下限,孔隙度下限为1.6%,渗透率下限为0.024× 103μm2。本文采用了交会图法以及侧向-阵列感应法开展储层流体性质识别研究,发现两种方法均能较好的区分气层、水层、含气层等,其中交会图法识别效果最好,实际中综合应用各种方法识别流体性质才能取得更好的效果。通过对储层分布控制的主要因素分析,选取沉积微相、孔隙度、渗透率、有效厚度及声波时差作为关键参数,采用赋值的方法对有利区进行了优选,在研究区划分出3个Ⅰ类有利区、12个Ⅱ类有利区、12个Ⅲ类有利区,其中Ⅰ类勘探开发价值最高。
[Abstract]:Sulige gas field, located in the northern part of Ordos Basin, is a super large gas field in China. The Lower Paleozoic Majiagou formation reservoir is a typical carbonate reservoir. The reservoir characteristics and logging evaluation of the main gas formation of Majiagou formation are studied in order to provide the basis for reservoir evaluation and development in the follow-up study area. On the basis of comprehensive utilization of core data, logging data and geological data, In this paper, the reservoir characteristics of the Mawu member of the Majiagou formation are studied from three aspects: petrological characteristics, physical properties and reservoir space types. It is found that the reservoir rock type of the Majiagou formation is dolomite, and the reservoir space is mainly composed of intergranular pores and dissolved pores. The study of sedimentary facies and sedimentary microfacies of Majiagou formation reservoir shows that the reservoir of Majiagou formation often develops stratification and bird-hole structure. The sedimentary structures, such as nodules, belong to tidal flat subfacies, and the main types of sedimentary microfacies are Yunping, grey cloud flat, mud cloud flat, etc. Based on the reservoir core physical property analysis data and logging data in the study area, a mud content model suitable for carbonate reservoir in the study area has been established. The porosity model, permeability model and saturation model have high accuracy and good applicability through model test. The lower limit of physical properties of reservoir is determined by combining empirical statistics method and cross plot method. The lower limit of porosity is 1.6 and the lower limit of permeability is 0.024 脳 10 ~ 3 渭 m ~ (2). In this paper, the cross plot method and the lateral array induction method are used to identify the reservoir fluid properties. It is found that the two methods can distinguish gas reservoir, water layer, gas bearing layer and so on. The cross plot method is the best method to identify the fluid properties. Through the analysis of the main factors controlling reservoir distribution, the sedimentary microfacies, porosity, permeability are selected. The effective thickness and acoustic moveout are taken as the key parameters, and the favorable areas are selected by the method of assignment. In the study area, there are 3 favorable areas of type 鈪，

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