Diagenesis and diagenetic stages prediction of Ed2 reservoir in the west of Bozhong sag

作     者：Wendao Qian Taiju Yin Changmin Zhang Guowei Hou Miao He 

作者机构：Yangtze UniversityWuhan430100China Shanghai Branch of CNOOC Ltd.Shanghai200030China 

出 版 物：《Petroleum》 (油气（英文）)

年 卷 期：2020年第6卷第1期

页      面：23-30页

核心收录：

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：This research work was funded by Major Projects of National Science and Technology“Large Oil and Gas Fields and CBM Development”(Grant No.2016ZX05027-02-007) Major Projects of National Science and Technology“Large Oil and Gas Fields and CBM Development”(Grant No.2016ZX05024-003-004) the National Natural Science Foundation of China(Grant No.41672119) 

主　　题：Diagenetic stages Clastic sandstones Bozhong sag Diagenetic simulation Overpressure Synthetic indexes 

摘      要：Diagenesis of clastic rock and hydrocarbon generating capacity are closely related with diagenetic *** on diagenetic evolution,reservoir diagenetic stages prediction method is proposed through making a contrastive study of simulation results and test results using core measurement *** essence of this method is illustrated and its effectiveness is demonstrated using Ed2 clastic sandstones in the west of Bozhong sag,Bohai Bay Basin,*** of paleo temperature(T),vitrinite reflectivity(Ro%)and the proportion of smectite in illite/smectite interstratified minerals(I/S-S%)indicate that there are there types of diagenetic stages in the study area,including early diagenetic stage B,middle diagenetic stage A1 and middle diagenetic stage *** only considering T index for diagenetic stages prediction,the simulation results are more conservative than measured data with some situations,and the simulation result using Ro%for diagenetic prediction is less than measured data in some *** I/S-S%is used,the two situations above both *** depth,temperature,time duration,pressure and some chemical variables can change synchronously or asynchronously,it is difficult to attribute with certainty the parameters that affect the apparent diagenetic stages evolution *** stage variations can be significantly different in different parts of one sedimentary basin.A synthetic indexes method considering T,Ro%,I/S-S%to predict its distribution,and the simulation result has proved that the reliability of the model has greatly improved.