临南洼陷江家店地区沙三下亚段储集层成岩流体演化

发布时间：2018-06-05 07:21

  本文选题：济阳坳陷 + 惠民凹陷　； 参考：《新疆石油地质》2017年02期

【摘要】：通过对临南洼陷江家店地区10余口井的70余块样品的铸体薄片分析、流体包裹体特征总结及显微测温,揭示了沙河街组沙三下亚段储集层在埋藏过程中,经历了多期次的酸碱流体演化及油气充注:距今43.7×10~6—37.0×10~6a,地层流体呈弱碱性,成岩作用以压实作用为主,并发育少量早期黄铁矿胶结物;距今37.0×10~6—28.2×10~6a,有机质热演化导致地层流体呈酸性,发生长石的溶蚀及石英的Ⅰ期次生加大现象;距今28.2×10~6—24.~6×10~6a,有机酸开始脱羧,沙四下亚段的石膏层开始脱水,地层水变为碱性,发生石英溶解及碳酸盐矿物的胶结现象;距今24.~6×10~6—14.0×10~6a,有机质热演化使地层水持续呈酸性,发生长石、碳酸盐胶结物的溶蚀及石英的Ⅱ期次生加大现象;距今14.0×10~6—2.8×10~6a,烃源岩再次演化生烃,地层水持续呈酸性;2.8×10~6a至现今,地层水呈弱碱性,发育少量的晚期黄铁矿胶结物。
[Abstract]:Through the analysis of casting thin slices of more than 70 samples from more than 10 wells in Jiangjiadian area of Linnan sag, the characteristics of fluid inclusions and microthermometry, it is revealed that the reservoir of the lower member of Shahejie formation is buried in the process of burial. After several periods of acid-base fluid evolution and hydrocarbon filling: 43.7 脳 106-37.0 脳 10 ~ (6) a, the formation fluid is weak alkaline, diagenesis is mainly compaction, and a small amount of early pyrite cementation is developed. 37.0 脳 10 ~ (-1) 脳 10 ~ (6) ~ (6) 脳 10 ~ (2) 脳 10 ~ (6) 脳 10 ~ (6) a, thermal evolution of organic matter resulted in acidic formation fluid, dissolution of feldspar and secondary increase of quartz in stage 鈪，

本文编号：1981143