低渗透砂岩压裂层位优选的测井评价模型  

An Optimization Well Logging Interpretation Model of Fractured Intervals in Low-permeability Sandstone Reservoir

作　　者：刘晓虹[1,2] 刘克智[3] 李凌高[2] 

机构地区：[1]中国地质大学能源学院,北京海淀100083 [2]中国石油勘探开发研究院,北京海淀100083 [3]渤海石油职业学院,河北任丘062552

出　　处：《西南石油大学学报（自然科学版）》2012年第2期79-85,共7页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家"973"项目(2006CB202302);国家自然科学基金项目(40372056)

摘　　要：典型的低渗透砂岩储层具有非均质性严重、储层产能受岩性和物性因素影响较大、自然产能相对较低等特点,需要对储层进行改造才能见到较好的效果。水力压裂是低渗透储层增产的有效手段,选井选层直接影响压裂效果,目前油田主要依靠经验选择施工井层,不能保证压裂后获得很好的增产效果。利用测井资料处理分析得到低渗透砂岩储层产能评价的关键参数,可以有效地开展低渗透储层压裂产能预测与层位优选,评价产能改造潜力,指导酸化压裂层位的选取和施工,提高油藏开发效益。利用测井、岩芯及测试等资料,从低渗透砂岩储层的岩石矿物、粘土矿物、钙质胶结物、微观孔隙结构等方面入手,分析了影响低渗透砂岩产能的储层因素,构建了储层精细评价和产能预测的测井优化模型,确定了低渗透砂岩储层压裂层位优选标准和图版,最终实现了对压裂优选层位的分级划分。Low-permeability sandstone reservoir＇s flow potential is seriously influenced by lithology and physical property. The natural productivity is relatively low, which will perform well only after the reservoir reconstruction. Through the dis- cussion of rock mineral, clay mineral, calcareous cement and microscopic pore structure, combined with well logs, cores and experiments, in this paper the factors that have effort on low-permeability sandstone reservoir＇s flow potential was analyzed, the key parameters in the evaluation of low-permeability sandstone reservoir were determined, the optimized production layer standards and plates for the fracture of low-permeability sandstone reservoir were figured out, the optimized logging model for reservoir fine evaluation and productivity prediction was established, and finally the optimized fracturing production layers hierarchically were classified. This result will be the guidance for production and has utilization value in improving harvest rate in the oil production test of reservoir and predicting effects after fracturing.

关 键 词：低渗透 砂岩 产能评价 压裂 优选 

分 类 号：TE132[石油与天然气工程—油气勘探] P631[天文地球—地质矿产勘探]