鄂尔多斯盆地寒武系气藏勘探潜力分析  

Exploration Potential Analysis of Cambrian Gas Reservoir in Ordos Basin

作　　者：郭洪娟 聂冀强 Guo Hongjuan;Nie Jiqiang(The First Geology Group of Hebei Geology and Mineral Resources Exploration Bereau,Handan 056001)

机构地区：[1]河北省地质矿产勘查开发局第一地质大队,河北邯郸056001

出　　处：《石化技术》2023年第7期164-166,共3页Petrochemical Industry Technology

摘　　要：鄂尔多斯盆地寒武系因其埋藏深、物性差,勘探程度一直较低,近年来新井陆续在寒武系钻获高产天然气流,表明该层系具有极大的勘探潜力。通过地震资料精细解释,结合已知钻井资料,落实了寒武系展布特征,明确上古生界煤系地层、中寒武统徐庄组深灰色-黑色细粒沉积建造及下寒武统三道撞组灰黑色泥页岩联合供烃,是寒武系潜在的烃源岩。晚寒武世强烈的白云岩化形成规模分布的白云岩储层,储集空间主要为晶间孔、溶孔和溶洞,局部发育裂缝,发育自生自储、上生下储及下生上储三种生储盖组合类型。Due to its deep burial depth and poor porosity and permeability,the exploration degree of Cambrian system in Ordos Basin has been low.In recent years,new wells have been drilled in the Cambrian system and obtained high production gas flow,indicating that this system has great exploration potential.Based on precise interpretation of seismic data and the well drilling data,the distribution characteristics of the Cambrian system are revealed,and the coal measure strata of the Upper Paleozoic,the dark gray-black fine grained sedimentary formation of the Middle Cambrian Xuzhuang Formation and the grayish-black mud shale of the Lower Cambrian Sandaozhuang Formation are identified as the potential source rocks of the Cambrian system.In the Late Cambrian,intense dolomitization formed large-scale dolomite reservoirs.The reservoir Spaces are mainly intergranular pores,dissolved pores and karst caverns,and locally fractures developed.There are three source-reservoir-cap assemblages:self-generation and selfstorage,upper generation and lower reservoir,lower generation and upper reservoir.

关 键 词：鄂尔多斯盆地 寒武系 勘探潜力 成藏模式 

分 类 号：P618.13[天文地球—矿床学]