海相油气地质2017，Vol.22Issue(2)：40-50,11.DOI:10.3969/j.issn.1672-9854.2017.02.006
鄂尔多斯盆地奥陶系 颗粒滩白云岩储层特征及主控因素
Characteristics and Main Controlling Factors of Ordovician Grain Beach Dolomite Reservoir in Ordos Basin
摘要
Abstract
Based on the data from cores, thin-sections, porosity and permeability, and geochemistry, three sets of grain beach dolomite reservoirs were developed under the Ordovician gypsum salt in east-central Ordos Basin. They were the Lower Ordovician Majiagou Member-2, Member-4, and Submember-57+9. According to the lithofacies palaeogeography, the grain beach usually distributed around the depression (Member-2) and the secondary depression (Submember-57+9) in the platform, especially on the relative uplift belts. The types of dolomite reservoirs are mainly intergranular pores, intercrystalline pores, intercrystalline dissolution pores, dissolution pores and caves, and fractures. 3-D computed tomography shows that the dolomite reservoir has excellent porosity and permeability. The genesis of the grain beach dolomite is mainly the osmotic reflux of evaporative seawater in shallow burial diagenetic environment. The development of the dolomite reservoir is mainly controlled by three factors:the distribution of the grain beach under the sequence framework, the karstification, and the fracture system.关键词
鄂尔多斯盆地/颗粒滩/白云岩储层/储层成因/岩溶/裂缝Key words
Grain beach/Dolomite reservoir/Reservoir genesis/Karstification/Fracture/Ordos Basin分类
能源科技引用本文复制引用
吴东旭,吴兴宁,王少依,于洲,丁振纯,孙云川,杨越东..鄂尔多斯盆地奥陶系 颗粒滩白云岩储层特征及主控因素[J].海相油气地质,2017,22(2):40-50,11.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:2016ZX05004-002)和中国石油集团科技重大专项"深层油气勘探开发关键技术研究"(编号:2014E-32-02)联合资助 （编号:2016ZX05004-002）
