地质勘探
天然气勘探与开发
2017年3月出版
鄂尔多斯盆地乌审旗一横山地区下奥陶统马五1+2
亚段
储层综合评价
费世祥12于雷12霍俊洲3张光一4
1.中国石油长庆油田公司勘探开发研究院2.低渗透油气田勘探开发国家工程试验室
3.中国石油长庆油田公司第六采气厂4.中国石油长庆油田公司第三输油处
摘要鄂尔多斯盐地乌审旗一横山地区下奥陶统马五12亚段为海相碳酸盐地层，是该区的主要产气层之一，其储层的形成和发育特征受到古地航和着溶作用、沉积环境和成岩改造的综合作用，储层分布连片性差，具有较强的非均质性，详细评价储层难度大，早期在低孔隙度、低渗透率储层研究中，仅以静态参数为依据作为划分储层类别的依据和标准，研究程度不够细致、深入，为了弄清乌审族一横山地区下奥陶统马家沟组马五1+2亚段储层展布特征和优质储层发育的主控因素，从储层的岩石学特征、孔渗条件、微观孔除类型等方面进行描述表征，利用压承、相渗和核磁共报等手段对储层孔隙结构特征进行研究，结合储层测试产能，提出了该区储层划分标准，并开展了储层综合评价。在此基础上，结合沉积、成着、古地貌和岩溶等作用，分析影响储层
发育的主要影响因素，明确了各类储层平面分布位置和展市规律，为该区气田开发有利建产区优选提供了依据。关键词鄂尔多斯盆地
碳酸盐岩储层综合评价控制因素
乌审旗一横山地区
下奥陶统马家沟组马五1+2
ComprehensiveevaluationonMa5i+2sub-memberreservoirsofLowerOrdovician
inUxinBanner-Hengshanarea,theOrdosBasin
FeiShixiang"2,YuLei'-2,Huo Junzhou',Zhang Guangyi
(l.Research InstituteofExploration andDevelopment,PetroChinaChangqingOifield Company,Xi'an,Shaanxi 710021,China;2.NationalEngineeringLaboratory of Low-permeabilityOil&GasExploration andDevelopment, Xi'an, Shanxi 710018, China; 3. No.6 Gas Production Plant, PetroChina Changqing Oilfield Company, Xi'an, Shaanxi710021,China; 4.TheThird OilTransportationDepartment,PetroChinaChangqingOilfield Company,Yin-chuan,Ningxia750006,China)
Abstract: In the Uxin Banner-Hengshan area of the Ordos Basin, the Lower Ordovician Ma5+2 sub-member is a marine carbonate formation and it is one of the main gas pay zones. The formation and development characteristics of reservoirs are dominated jointly by palaeogeomorphology and karstification, depositional environment and diagenetic reconstruction, and they are poorly connected with strong heterogeneity, so it is difficult to carry out detailed reservoir evaluation, In the early stage of low-porosity and low-per-meability reservoir study, static parameters were the only basis and criteria of reservoir classification, so the research was not detailed or thorough enough. In this paper, the Ma5i+2 reservoirs of Lower Ordovician Majiagou Formation in the Uxin Banner-Hengshan area were characterized from the aspects of petrologic characteristics, porosity-permeability conditions and micro-pore types to clarify their distribution characteristics and the main factors controlling the development of high quality reservoirs. The structural characteristics of pores in reservoirs were analyzed by means of mercury injection, relative permeability and nuclear magnetic resonance (NMR), Then, based on reservoir productivity test, the reservoir division criterion of this area was proposed and the reservoirs were evaluated comprehensively. On this basis, combined with sedimentation, diagenesis, palaeogeomorphology and karstification, the main factors affecting reservoir development were analyzed, and plane distribution location and distribution laws of various reservoirs were figured out. It provides the basis for selecting the favorable zones of productivity construction in this area.
Keywords: Ordos Basin; Uxin Banner-Hengshan area; Early Ordovician; Ma5μ+2; Carbonate reservoir; Comprehensive evaluation; Controlling factors
基金项目：中国石油重大专项“低/特低渗透油藏有效开发技术研究——长庆油田油气当量上产5000万吨关键技术研究”（编号： 2011E-1306)。
第一作者简介：费世祥，1984年生，工程师；主要从事气田地质研究、水平井开发等方面的研究工作。地址：（710018）陕西省西安市未央区长庆兴隆园小区中国石油长庆油田公司勘探开发研究院天然气开发一室。电话：(029)86594773。E-mail：fshix_cq@
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