低孔低渗油藏储层物性及其影响因素研究——以鄂尔多斯盆地陇东地区延长组长3-长4+5油层组为例  

Research on physical properties and influence factors of low porous and low permeable reservoirs

作　　者：魏虎 任大忠[2] 苏国辉[3] 张茜 张瑞 

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075 [2]西北大学大陆动力学国家重点实验室/地质学系,陕西西安710069 [3]长庆油田分公司油气工艺研究院,陕西西安710021

出　　处：《地下水》2013年第4期181-183,共3页Ground water

基　　金：国家科技重大专项大型油气田及煤层气开发(2011ZX05044);陕西省科技统筹创新工程(2011KTZB01-04-01)

摘　　要：通过电镜、铸体薄片、物性、X衍射等测试分析方法进行综合评价,对鄂尔多斯盆地陇东地区延长组长3、长4+5油层组的储层物性及其影响因素进行研究。研究表明鄂尔多斯盆地陇东地区延长组储层物性整体上呈现出低孔、低渗的特征,孔隙类型主要以粒间孔隙、长石溶孔为主,长3、长4+5油层组处于中成岩阶段A期。沉积相带、沉积物的物源及成岩作用是储层形成过程中关键的因素。Based on analysis of casting thin section, electron microscope and x - ray diffraction test of Chang 3 and Chang 4 ＋ 5 reservoir groups in Longdong area of Ordos Basin, physical properties and influence factors of YanChang formation in this area were studied. The result shows that YanChang formations in studied area are characterized by low porosity and low perme- ability. Among various types of reservoir pores, intergranular pore and feldspar dissolved pore are most commonly. Chang 3 and Chang g ＋ 5 oil - bearing formations are in A phase of mesodiagenesis. The main factors influence the formation of reser- voir are sedimentary facies, diagenesis and provenance of sediment.

关 键 词：物性 沉积相带 沉积物物源 成岩作用 陇东地区延长组 

分 类 号：TE122.23[石油与天然气工程—油气勘探]