摘要
为了解鄂尔多斯盆地高桥地区奥陶系马家沟组马五1-2(Ma51-2)亚段岩溶作用与储层孔隙演化规律,采用岩心观察、铸体薄片及扫描电镜、能谱等测试分析方法进行了研究。结果表明:研究区Ma51-2亚段碳酸盐岩经历了3期古岩溶作用:(准)同生期岩溶、表生期岩溶和埋藏期岩溶。受加里东中、晚期—早海西期构造运动的影响,碳酸盐岩储层先后经历了准同生期成岩、表生期成岩、浅埋藏成岩、中-深埋藏成岩阶段,相应地,孔隙演化经历了原生孔隙形成—缩减期、缝洞发育期、缝洞缩减充填期和裂缝、埋藏溶蚀—充填期4个阶段。
Based on the observation of drilling cores,casting slices,scanning electron microscope images,and electron probe microanalysis,we assess the karstification and porosity evolution of Ma51-2sub member,Ordovician Majiagou Formation,Gaoqiao region.The areas of carbonate karst of Ma51-2have been divided into three categories as following：syngenetic karst,supergene karst and buried stage karst.Influenced by the middle-later period caledonian and early Hercynian,the carbonate reservoir has certainly been action-pack penecontemporaneous into rock,surface into rock and bury into rock.Correspondingly,porosity evolution have experienced four stages that were the formation of pores to reduction,fracture-cave developments,fracture-cave reduction,crack and bury corrosion to filled.
出处
《地质科技情报》
CAS
CSCD
北大核心
2014年第4期60-65,共6页
Geological Science and Technology Information
基金
国家科技重大专项"大型油气田及煤层气开发"(2011ZX05007-004)
