地质科技情报2017，Vol.36Issue(3)：182-188,7.DOI:10.19509/j.cnki.dzkq.2017.0324
东濮凹陷杜寨地区沙三中-下段致密砂岩气藏有效储层物性下限
Lower Limits of Porosity and Permeability of Tight Sandstone Gas Reservoirs in the Middle-Lower Es3 in Duzhai Area, Dongpu Depression
摘要
Abstract
The tight sandstone gas reservoirs in the middle-lower Es3 are characterized by lower porosity and permeability,however their lower limits of porosity and permeability are still unclear.Based on the measured porosity and permeability of cores and mercury injection data,this paper determined the lower limits of porosity and permeability of tight sandstone gas reservoirs in the middle-lower Es3 in the Duzhai area,comprehensively using empirical statistic method,cross plot of porosity and permeability,minimum flow pore throat radius method (including water film thickness method,Wall and Purcell methods),and mercury injection curve method.The results show that the lower limits of porosity and permeability determined by different methods are various.The lower limit of porosity ranges from 3.92％ to 5.306％ and averages out to 4.264％,while the lower limit of permeability ranges from 0.032× 10-3 μm2 to 0.059× 10-3 μm2 and averages out to 0.038 7× 10-3 μm2.Generally,the lower limits of porosity and permeability determined by empirical statistic method are smaller,whereas the lower limits determined by minimum flow pore throat radius method and mercury injection curve method are relatively greater,especially by the Purcell method,which is possibly related to its capacity for characterizing the contribution of the large pore throat.Then the arithmetic mean values are taken as the lower limits of porosity and permeability.The calculated lower limit of porosity is 4.264％ and that of permeability is 0.038 7 × 10 3 μm2 for the tight sandstone gas reservoirs in the middle-lower Es3 in Duzhai area in the Dongpu Depression.关键词
致密砂岩气藏/物性下限/沙三中-下段/东濮凹陷Key words
tight sandstone gas reservoir/lower limits of porosity and permeability/middle-lower Es3/Dongpu Depression分类
天文与地球科学引用本文复制引用
吕雪莹,蒋有录,刘景东,张园园..东濮凹陷杜寨地区沙三中-下段致密砂岩气藏有效储层物性下限[J].地质科技情报,2017,36(3):182-188,7.基金项目
国家重大科技专项(2011ZX05006-004) （2011ZX05006-004）
