鄂尔多斯盆地宜川—黄龙地区奥陶系风化壳储层特征及主控因素研究  

Characteristics and Controlling Factors of Ordovician Weathering Crust Reservoir in Yichuan-Huanglong Area,Ordos Basin

作　　者：董岩[1] 王少依 柏淑英 王川[1] 

机构地区：[1]中国石油新疆油田分公司勘探开发研究院 [2]中国石油杭州地质研究院 [3]中国石油新疆油田分公司陆梁油田作业区

出　　处：《海相油气地质》2017年第3期37-46,共10页Marine Origin Petroleum Geology

基　　金：国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05004-002);中国石油天然气股份有限公司重大科技专项"深层油气勘探开发关键技术研究"(编号:2014E-32)联合资助

摘　　要：以岩心观察、薄片鉴定及测井资料解释为基础,结合孔隙充填物地球化学参数分析,对鄂尔多斯盆地宜川—黄龙地区奥陶系上组合风化壳储层特征及储层发育主控因素进行了研究。储层岩性主要为白云岩类及次生灰岩。储集空间以硬石膏结核溶模孔为主,溶蚀孔洞、晶间孔次之,裂缝对储层储渗性能具有一定的改善作用。储层具有低孔、低渗特征,孔隙度<2%的居多(占73.8%),渗透率<0.01×10^(-3)μm^2的最多(占86.6%)。储层发育主要受沉积相和成岩作用控制:处于相对高能环境的砂屑滩、(含)硬石膏结核白云岩坪是优质储层发育的有利相带;岩溶作用及白云石化作用是主要的建设性成岩作用,与之伴生的充填作用、压实作用及次生灰化作用是主要的破坏性成岩作用。Based on the cores, th in sections, well logging data, and geochemical parameters of pore filling , the characteristics and main controlling factors of weathering crust reservoir in Lower O rd ovician M aj iagou Submember-51_4, Yichuan-Huanglong area o f Ordos Basin were studied. It’s shown that the p rim a ry reservoir is dolostone whi le the secondary reservoir is limestone. The reservoir space is m a in ly composed of anhydrite m oldic pores, and secondly composed of d is solution pores and intergranular pores. The fractures have a certain effect on the reservoir permeabi l ity. In general, the reservoirs are of low porosity （ma in ly less than 2%） and low permeability （less than 0.01×10-3μ m2）. Co n tro l le d by sedimentation and diagenesis, the grain -beach and a n hydrite concretion -bearing dolomitef lat are the favorable facies, and karstification and dolomitization are the most important constructive, whi le associated inf i lling , compaction, and dedolomitization are mainly destructive.

关 键 词：鄂尔多斯盆地 宜川地区 黄龙地区 奥陶系 碳酸盐岩 风化壳 储层特征 

分 类 号：TE122.2[石油与天然气工程—油气勘探]