博兴洼陷东南部沙四段储层的流体史研究

通过成岩矿物的世代关系、流体包襄体研究和荧光检测，重现了研究区沙四段深部(2700m～3000m)和浅部(1600m～2700m)流体活动和油气充注历史。流体充注过程为：晚成岩阶段早期富含有机质的酸性流体形成和运移，碳酸盐矿物溶解和次生孔隙形成→东营末期第一期石油运移→第一期盐水流体运移和石英沉淀结晶→馆陶期—明化镇期开始第二期石油运移→第二期盐水流体运移和新的石英结晶。浅部储层中缺少第一期石油充注和第二期盐水流体充注。盐水流体可能与油田底水或边水相当。富含有机的酸性流体与岩石作用时，矿物的溶蚀有利于次生孔隙的形成。

STUDY ON FLUID HISTORY OF RESERVOIRS FROM SHASI MEMBER, SOUTHEAST BOXING DEPRESSION

Based on generation relation of diagenetic minerals, fluid inclusion and fluorescence detection,the history of fluid activity and oil charging is reconstructed for reservoirs of Shasi Member located at depth of 1 600 m~2 700 m and 2 700 m~3 000 m.The process of fluid charging is as follow : 1)Fluids rich in organic acid formed and migrated while carbonate minerals were dissolved and secondary pores were developed during early stage of late diagenesis. 2) The first stage migration of oil took place in Dongying period.3)Then, the first stage migration of salt-water fluids began and first generation quartz grew along secondary pores margin.4)The second stage migration of the oil happened in period of Guantao-Minghuazhen. 5) The second stage migration of salt-water fluids took place following the migration of oils and growth of the second generation quartz. The first stage migration of oil and the second stage migration of salt-water fluid were absent at depth of 1 600 m~2 700 m.The salt-water fluids may correspond to bottom water or edge water of oil field. The migration of fluids rich in organic acid played a very important role in development of secondary pores.