石油勘探与开发2017，Vol.44Issue(3)：319-329,11.DOI:10.11698/PED.2017.03.01
致密碳酸盐岩储集层特征与天然气勘探潜力——以鄂尔多斯盆地伊陕斜坡东部奥陶系马家沟组为例
Gas exploration potential of tight carbonate reservoirs: A case study of Ordovician Majiagou Formation in the eastern Yi-Shan slope, Ordos Basin, NW China
摘要
Abstract
On the basis of comprehensive analysis of drilling,gas testing,laboratory analysis and testing data,the characteristics and genesis of tight carbonate reservoirs in Ma51+2 Member of Ordovician Majiagou Formation,eastern Yi-Shaan slope,Ordos Basin were examined,and the potential of natural gas exploration and development were analyzed.The tight carbonate reservoir is defined as the reservoir with a porosity of less than 2％ and permeability of less than 0.1 × 10-3 μm2,The Ma51+2 reservoirs are dominantly gypsum mud dolomite,muddy dolomite and Karst-breccia dolomite and has strong heterogeneity,pore types being mainly composed of fracture-dissolution pores and fracture-intercrystalline pores,and thin reservoir layers are distributed in a large area.The unconformity structure adjustment at the top of the Ordovician caused pore creation and pore filling effects,and the joint effect of dissolution pore increase and pore reduction by filling is the major reason for extensive reservoir densifieation.The thin tight dolomite reservoirs and the overlying adjacent coal source rock in the Upper Paleozoic formed extensive tight carbonate gas with shallow depth (1 900-2 500 m) and formed a three-dimensional gas containing pattern combined with the Upper Paleozoic tight sandstone gas.The eastern Yi-shaan slope in the Ordos Basin has great exploration and development potential.关键词
鄂尔多斯盆地/伊陕斜坡东部/致密碳酸盐岩储集层/致密气/勘探潜力Key words
Ordos Basin/eastern Yi-Shan slope/tight carbonate reservoir/tight gas/exploration potential分类
能源科技引用本文复制引用
魏新善,赵俊兴,陈洪德,张道锋,代榕,郭彦如,陈娟萍,任军峰,柳娜,罗顺社..致密碳酸盐岩储集层特征与天然气勘探潜力——以鄂尔多斯盆地伊陕斜坡东部奥陶系马家沟组为例[J].石油勘探与开发,2017,44(3):319-329,11.基金项目
国家科技重大专项“大型油气田及煤层气开发”(2016ZX05044) （2016ZX05044）
