井研-犍为地区筇竹寺组页岩储层含气性测井评价  

Log Evaluation of Gas Bearing Property for Shales Reservoir of Qiongzhusi Formation in Jingyan-Qianwei Area

作　　者：钟文俊 熊亮[1] 程洪亮[1] 黄璞 黎鸿 ZHONG Wenjun;XIONG Liang;CHENG Hongliang;HUANG Pu;LI Hong(Exploration and Development Research Institute, Sinopec Southwest Oil and Gas Company, Chengdu, Sichuan 610041, China)

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《测井技术》2022年第3期311-318,共8页Well Logging Technology

基　　金：中国石油化工股份有限公司科技部重大专项“西南探区天然气富集规律与分布预测”(P20059-3)。

摘　　要：井研-犍为地区筇竹寺组由于受沉积环境影响岩性复杂,不能确定其油气勘探目标层,该区多年亦未获得勘探突破。为深化该区筇竹寺组页岩储层含气性评价,以岩心实验为基础,基于测井资料计算储层的孔隙度、总有机碳含量、吸附气含量、游离气饱和度、游离气含量及总含气量等主要地质参数,建立以游离气为核心参数的筇竹寺组粉砂质页岩储层评价方法。应用优选的测井评价分类指标,开展黑色页岩和粉砂质页岩这2类岩相页岩储层的含气性评价,评价筇竹寺组中部⑦号层相对高伽马段为气层,平面分布稳定,是该区的甜点层。研究形成的筇竹寺组含气性评价方法应用于该地区纵向目标优选,为资源潜力评价提供了技术支撑。The Qiongzhusi formation in Jingyan-Qianwei area is affected by the sedimentary environment,the lithology is complex,and the target zone of oil and gas exploration has not been determined,and the exploration breakthrough in this area has not been achieved for many years.In order to deepen the gas bearing evaluation of shales in this area,based on the core experiment,the main geological parameters of the reservoir,such as porosity,total organic carbon,adsorbed gas content,free gas saturation,free gas content and total gas content are calculated based on the logging data,evaluation method of silty shale reservoir of Qiongzhusi formation with free gas as the core parameter is established.Using the optimized log evaluation classification index,the gas bearing evaluation of two types of lithofacies shale reservoirs,black shale and silty shale,is carried out.It is considered that the relatively high gamma section of layer⑦in the middle of Qiongzhusi is evaluated as a gas reservoir with stable plane distribution and can be used as the optimal sweet layer.The method of gas bearing evaluation can be used to do the vertical optimal selection in Qiongzhusi formation,providing technical support for the evaluation of block resource potential.

关 键 词：页岩储层 吸附气 游离气饱和度 测井评价 筇竹寺组 

分 类 号：P631.84[天文地球—地质矿产勘探]