摘要
传统观点认为济阳坳陷桩海地区下古生界碳酸盐岩中的大部分孔隙是早期大气淡水成因,晚期埋藏溶蚀对孔隙形成来说一般只具有破坏性,因此其深埋藏期溶蚀作用形成的孔隙直到目前仍是被忽略的。本文通过对桩海地区下古生界的岩心描述和镜下观察,探讨并总结了埋藏溶蚀作用的特征。对桩古10井下古生界储集空间发育特征进行的分析表明,其残留马家沟组受后期埋藏溶蚀作用显著,各种次生溶蚀孔洞和扩容缝为主要孔隙类型,储集空间类型为复合型。复合型孔隙的形成主要是孤北洼陷巨厚的第三系沉积物压释水沿边界断层向高部位的桩西潜山运移并在埋藏条件下产生溶蚀而成。
Traditional point of view believes that pore of carbonate is caused by corrosion of early stage freshwater, late buried modification only destroy the pore. So pore in carbonate caused by late buried modification of Zhuanghai area in Jiyang Depression has been neglected. The characters of late buried modification are discussed through core description and microscope observation. After the development chaaracter of reservoir space of the Well Zhuanggu 10 is analyzed, we believe that Majiagou Formation beared significant deep fluids modification. Secondary modification cavity, fissure and bore act as primary reservoir, the reservoirs are complex types. The complex pores caused by press-dispel-waterofthetertiarysedi- mentswhich transported through boundary fault to highness of Zhuangxi buried hill and caused the buried modification pore, came from Gubei sag.
出处
《油气地球物理》
2007年第3期51-57,共7页
Petroleum Geophysics
关键词
埋藏溶蚀
储集性
下古生界
桩古10井
桩海地区
Buried modification, reservoir character, Paleozoic, Well Zhuanggn10 and Zhuanghai area.
