鄂尔多斯盆地盒8段致密砂岩储层溶蚀模拟实验

郭壘,李程善,范立勇,康锐,张英,陆应新,张明峰,吕成福

Experimental study on dissolution simulation of tight sandstone reservoir in the He 8 Member of Ordos Basin, China

Lei GUO,Cheng-shan LI,Li-yong FAN,Rui KANG,Ying ZHANG,Ying-xing LU,Ming-feng ZHANG,Cheng-fu LÜ

图1 盒8段砂岩岩溶模拟前后的矿物与孔隙特征 （a）含钙岩屑砂岩，正交光；（b）含钙岩屑砂岩，单偏光；（c）长石质岩屑砂岩，正交光；（d）长石质岩屑砂岩，单偏光；（e）含钙岩屑砂岩，120 ℃/35 MPa，变质岩岩屑残骸，残存方解石，单偏光；（f）含钙岩屑砂岩，120 ℃/35 MPa，微斜长石残骸，单偏光；（g）长石质岩屑砂岩，150 ℃/40 MPa，微斜长石残骸，单偏光；（h）长石质岩屑砂岩，150 ℃/40 MPa，花岗岩岩屑残骸，单偏光；（i）、（j）含钙岩屑砂岩中钠长石溶蚀及高岭石，SEM；（k)、（l）长石质岩屑砂岩中钾长石溶蚀及高岭石，SEM

Fig.1 Mineral and pore characteristics of sandstone before and after karst simulation of He8 Member