摘要
通过地质、地球化学、地球物理等学科的综合研究,认为原始沉积作用、岩溶作用、白云岩化作用和构造破裂作用是形成济阳坳陷桩海地区下古生界古潜山碳酸盐岩储层的主要作用。其中原始沉积作用控制了石灰岩储集物性的特征;岩溶作用使储层物性进一步改善,形成优质的碳酸盐岩岩溶储层;白云岩化作用形成了优质的白云岩岩性储层;岩石的原生孔隙度是成岩白云岩储层形成的必要条件;白云石化过程中粒屑的收缩作用是白云岩储层孔隙的形成机制;破裂作用形成的裂缝是发生强烈岩溶作用的基础,并形成了裂缝性或缝洞性储层。进而认识到,平面上桩海地区下古生界碳酸盐岩储层缝洞分布呈条带状。
Based on an integrated study of geologic,geochemica! and geophysical data,original sedimentation,karslifica-lion,dolomitization and tectonic disruption are recognized to be the main mechanisms for formation of the Lower Paleozoic carbonate reservoirs in Zhuanghai buried hill of Jiyang depression.The initial sedimentation controls the nature of the limestone reservoirs! the karstification improves the poroperm characteristics of the reservoirs and results in carbonate karst reservoirs of high quality;the dolomitization leads to the formation of dolomite reservoirs of high quality;the primary porosity is a necessary condition for the formation of dolomite reservoirs;the contraction of fragments during dolomitization leads to the formation of pores in the dolomite reservoirs;and the fractures are the base for strong karstification and the formation of fractured or frac-tured-vuggy reservoirs.In plane view,the fractures and vuggs in the Lower Paleozoic carbonate reservoirs are in zonal distribution in the study area.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2007年第10期1-5,129,共5页
Natural Gas Industry
基金
国家重点基础研究发展计划"973"项目(编号:2005CB422106)的资助
