七里村油田郭旗西区长6储层物性特征及其评价
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摘要
鄂尔多斯盆地长6油层组是延长组地层主要的储油层,是油气勘探开发的重点。根据井区大量试油、测井、取心资料求出了各测井参数下限值,在此基础上建立了长6储层的孔隙度、渗透率和含油饱和度测井解释模型。依据储层物性分类评价标准,郭旗西区长6储层为低孔、特低孔-特低渗、超低渗储层,主要受储层岩石学特征、沉积微相以及成岩作用的影响。
Chang 6 oil-bearing group is the primary reservoir of Yanchang Formation in Ordos Basin, which is focus for oil and gas exploration and development. Based on a large number of oil testing, well logging, and coring data in the well area, the author calculated the lower limits of each logging parameter, and on this basis established the logging interpretation model for the porosity, permeability, and oil saturation of the Chang 6 reservoir. According to the evaluation criteria of reservoir physical properties, Chang 6 reservoirs in the west of Guoqi are low porosity, ultra low porosity and ultra-low permeability, and ultra-low permeability reservoirs, which are mainly affected by reservoir petrological characteristics, sedimentary microfacies and diagenesis.
Chang 6 oil-bearing group is the primary reservoir of Yanchang Formation in Ordos Basin, which is focus for oil and gas exploration and development. Based on a large number of oil testing, well logging, and coring data in the well area, the author calculated the lower limits of each logging parameter, and on this basis established the logging interpretation model for the porosity, permeability, and oil saturation of the Chang 6 reservoir. According to the evaluation criteria of reservoir physical properties, Chang 6 reservoirs in the west of Guoqi are low porosity, ultra low porosity and ultra-low permeability, and ultra-low permeability reservoirs, which are mainly affected by reservoir petrological characteristics, sedimentary microfacies and diagenesis.
引文
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2赵林,夏新宇,戴金星,等.鄂尔多斯盆地上古生界天然气富集的主要控制因素[J].石油实验地质,2000,22(2):136-139.
3赵文智,汪泽成,陈孟晋,等.鄂尔多斯盆地上古生界天然气优质储层形成机理探讨[J].地质学报,2005,79(6):115.
4柳益群,李文厚.陕甘宁盆地东部上三叠统含油长石砂岩的成岩特点及孔隙演化[J].沉积学报,1996,(3):87-96.
5赵靖舟,吴少波,武富礼.论低渗透储层的分类与评价标准--以鄂尔多斯盆地为例[J].岩性油气藏,2007,19(3):28-31.