中国石油大学学报（自然科学版）2024，Vol.48Issue(4)：33-42,10.DOI:10.3969/j.issn.1673-5005.2024.04.004
致密砂岩储层岩石相建模新思路
New idea of lithofacies modeling for tight sandstone reservoir
摘要
Abstract
The types and spatial transition of lithofacies in tight sandstone reservoirs are complicated,with inter-well predic-tion being very difficult.Therefore,it is difficult to accurately characterize and make three-dimensional geological modeling with conventional modeling methods.In this study,taking well zone Dk13 of Daniudi gas field in Ordos Basin as an exam-ple,combining cores,logging,and field outcrop data,four types of lithofacies are divided,including fine conglomerate-gi-ant grained sandstones,coarse-grained sandstones,mid-fine grained sandstones and siltstones,and distribution character-istics of each lithofacies are defined.On this basis,a new lithofacies modeling idea of"zoning constraints and embedding step by step"is proposed:under the constraint of the maximum boundary of lithofacies plane distribution,facies modeling is carried out within the boundaries of fine conglomerate-giant grained sandstones facies and coarse sandstone facies respec-tively,and then each lithofacies model is embedded into the mid-fine grained sandstones facies model in turn to complete the modeling.The results show that the model is in line with the geological distribution characteristics,with high accuracy and stability.The average match rate of lithofacies in a single layer is over 90%.Compared with the conventional modeling idea,this idea does not use the completely random method in the prediction of inter-well lithofacies but uses the results of reservoir architecture analysis more,greatly improves the accuracy of inter-well lithofacies prediction,reproduces the com-plex spatial distribution pattern of lithofacies.关键词
致密砂岩/岩石相/储层建模/大牛地气田/储层构型Key words
tight sandstone/lithofacies/reservoir modeling/Daniudi gas field/reservoir architecture分类
能源科技引用本文复制引用
刘子豪,吴胜和,郭睿,徐振华,徐振永,刘建党,贾超,刘照玮..致密砂岩储层岩石相建模新思路[J].中国石油大学学报（自然科学版）,2024,48(4):33-42,10.基金项目
国家科技重大专项(2017ZX05009-002) （2017ZX05009-002）
