海相油气地质2017，Vol.22Issue(3)：37-46,10.DOI:10.3969/j.issn.1672-9854.2017.03.005
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
摘要
Abstract
Based on the cores, thin sections, well logging data, and geochemical parameters of pore filling, the characteristics and main controlling factors of weathering crust reservoir in Lower Ordovician Majiagou Submember-51-4, Yichuan-Huanglong area of Ordos Basin were studied. It′s shown that the primary reservoir is dolostone while the secondary reservoir is limestone. The reservoir space is mainly composed of anhydrite moldic pores, and secondly composed of dissolution pores and intergranular pores. The fractures have a certain effect on the reservoir permeability. In general, the reservoirs are of low porosity(mainly less than 2%) and low permeability (less than 0.01×10-3μm2). Controlled by sedimentation and diagenesis, the grain-beach and anhydrite concretionbearing dolomite flat are the favorable facies, and karstification and dolomitization are the most important constructive, while associated infilling, 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Key words
Ordovician/Carbonate rock/Weathering crust/Reservoir characteristics/Yichuan area/Huanglong area/Ordos basin分类
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董岩,王少依,柏淑英,王川..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[J].海相油气地质,2017,22(3):37-46,10.基金项目
本文受国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05004-002)和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 （编号:2011ZX05004-002）
