沉积学报2023，Vol.41Issue(6)：1847-1858,12.DOI:10.14027/j.issn.1000-0550.2023.046
基于分形理论的致密砂岩渗透率预测模型
Fractal-based Permeability Prediction Model for Tight Sandstone
摘要
Abstract
Permeability is a key factor that determines the seepage capacity of tight sandstone reservoirs and ultimate-ly determines productivity.[Objective]Owing to the complex pore structure and strong heterogeneity of tight sand-stone reservoirs,the permeability exhibits significant variation and is difficult to predict.Thus,it is urgent to develop a permeability prediction model suitable for tight sandstones.[Methods]Taking the Cretaceous Bashijiqike tight sandstone in the Keshen2 gas reservoir of the Kuqa Depression of the Tarim Basin as the research object,,we qualita-tively and quantitatively characterized the pore structure of tight sandstones by integrating routine physical analysis,microscopic observation based on thin section and scanning electron microscope,high-pressure mercury injection,nuclear magnetic resonance and fractal theory.[Results]Based on fractal theory and fully considering the influence of pore structure heterogeneity on permeability,two novel tight sandstone permeability prediction models based on fractal theory were proposed.[Conclusion]Compared with the rapex permeability prediction model,the permeability prediction accuracy of the r20 fractal model and the SDR(>40)fractal model increased by 42%and 20%,respectively.关键词
致密砂岩/高压压汞/核磁共振/分形维数/孔隙结构/渗透率Key words
tight sandstone/high-pressure mercury injection/nuclear magnetic resonance/fractal dimension/pore structure/permeability分类
天文与地球科学引用本文复制引用
宋泽章,王锐,梁骁,吕明阳,赵力彬,张月巧,何元元,姜福杰,杨振中,陈伟业,霍利娜..基于分形理论的致密砂岩渗透率预测模型[J].沉积学报,2023,41(6):1847-1858,12.基金项目
中石油科技创新基金项目(2021DQ02-0105) （2021DQ02-0105）
国家自然科学基金项目(41802148) （41802148）
四川科力特油气技术服务有限公司科技专项项目(SCKLT-JSZS-2022-0044) （SCKLT-JSZS-2022-0044）
中国石油天然气股份有限公司塔里木油田分公司科技专项项目(TXN011020120001)CNPC Science and Technology Innovation Fund,No.2021DQ02-0105 （TXN011020120001）
National Natural Science Foundation of China,No.41802148 （）
Major Science and Technology Projects of Sichuan Kelite Oil and Gas Technology Service Co.,Ltd,No.SCKLT-JSZS-2022-0044 （）
Major Science and Technolo-gy Projects of Tarim Oilfield Company,PetroChina,No.TXN011020120001 （）
