镇泾油田长6和长8油层组储层特征及伤害因素分析  

Characteristics and Damage Factors of Chang6 and Chang8 Reservoirs of Zhenjing Oilfield in Ordos Basin

作　　者：刘贤[1] 罗静兰[1] 董万平[1] 

机构地区：[1]西北大学大陆动力学国家重点实验室西北大学地质学系,陕西西安710069

出　　处：《科技情报开发与经济》2010年第9期137-140,共4页Sci-Tech Information Development & Economy

基　　金：国家重点基础研究发展计划(973)"多种能源矿产共存成藏(矿)机理与富集分布规律"(2003CB214603)

摘　　要：通过对鄂尔多斯盆地镇泾油田上三叠统延长组长6与长8油层组储层的岩石学特征、孔隙类型、孔隙结构特征、成岩作用及储层物性的研究,结合X-射线衍射分析、扫描电镜和储层敏感性试验结果,分析了长6、长8储层的伤害因素。结果表明,研究区长6、长8砂岩主要为低孔、低渗的中细粒长石砂岩,其孔喉类型为细孔—小喉型。砂岩填隙物中的黏土矿物是造成储层敏感性伤害的主要因素。砂岩的成分成熟度及结构成熟度较低、孔隙喉道细小以及成岩作用中的压实作用和胶结作用都是降低储层的孔隙度和渗透率的因素,也是储层伤害的因素,因此要加以防范。This paper analyzes some damage factors of Chang6 and Chang8 Reservoirs of Yanchang Formation of the Upper Triassic in Ordos Basin through the analysis on the petrologic characteristics,pore types, pore structure features, diagenesis and reservoir physical properties and connecting with the X-ray diffraction analysis,scanning electronic microscope （SEM）and test results of reservoir sensitivity. The results indicate that Chang6 and Chang8 sandstones in research area are mainly medium-and fine-grain mid-fine arcose sandstone with low porosity and low permeability, the throat type is slim hole-small throat. The clay minerals in sandstone fillings are the main factors causing the sensitive damage of reservoir. Because the lower compositional maturity and structural maturity of sandstone, the thinner pore throats, and the compaction and cementation in the diagenesis are the factors of lowering the porosity and permeability of reservoir, and also the factors causing the damage of reservoir, must prevent them.

关 键 词：储层特征 储层伤害因素 镇泾油田 

分 类 号：TE155[石油与天然气工程—油气勘探]