从密井网区到探评井区沉积微相平面图的编制

Drawing of sedimentary microfacies plane map from dense pattern to exploration assessment well areas

文中在沉积微相研究一般的"点—线—面"(取心井单井相—连井剖面相—平面相展布)思路的基础上,结合密井网区岩心、测井、录井、分析测试、实验测试、生产测试等资料及沉积演化特征、物源分析,对河道砂体进行精细解剖,依据各种识别标志确定单河道的边界,并利用注采关系加以验证。对密井区单河道宽度和厚度进行统计,拟合出密井网区单河道宽-厚定量关系式。据此关系式推测出稀井(探井、评价井)区单河道的宽度,再结合探井、评价井的岩心、测井、录井等资料,完成从密井网区到探评井区沉积微相平面展布特征的研究,编制出研究区精细的沉积微相平面图,这为储层特征分析、储层综合评价、开发动态分析、流体分布、有利区块预测、剩余油挖潜等储层精细研究提供了更准确的地质依据。

Based on the general sedimentary microfacies research methods of ＂point-line-face＂ （single well-well connection-plane） and combined with the dense pattern data including cores, logging, analytical test, production test, this paper carried out the fine study on channel sand body, determining the single sand boundary, fitting its width-thickness quantitative relationship, accordingly speculating out the single channel sand width in the dilute wells （exploration well and assessment well） area. Combined with the data of core, logging and mud logging, the research of sedimentary micrefacies distribution characteristics from the dense pattern area to the exploration assessment well area was completed. Finally, the plane map of more fine sedimentary microfacies was drawn, which provided more accurate geological basis for fine reservoir description, such as reservoir characteristics analysis, comprehensive reservoir evaluation, development dynamic analysis, favorable block prediction of fluid distribution and remaining oil potentials tapping.