致密砂岩脆性指数测井评价方法——以鄂尔多斯盆地陇东地区长7段致密砂岩储集层为例  

Logging Evaluation and Application of Brittleness Index in Tight Sandstone Reservoir——A case study of Chang-7 tight sandstone reservoir in Longdong area of Ordos basin

作　　者：李华阳[1] 周灿灿[1] 李长喜[1] 李潮流[1] 石玉江 王长胜 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油长庆油田分公司勘探开发研究院,西安710065

出　　处：《新疆石油地质》2014年第5期593-597,共5页Xinjiang Petroleum Geology

基　　金：国家科技重大专项(2011ZX05020-008);中石油基础研究项目(2011A-3901)

摘　　要：岩石的脆性指数是致密砂岩油气体积压裂设计中应考虑的重要因素之一。通过对岩石弹性参数法和矿物成分法两种脆性指数测井评价方法的分析,并应用岩石力学实验和全岩X衍射分析实验标定,建立了应用常规测井的多矿物模型确定致密砂岩脆性指数的方法。对鄂尔多斯盆地陇东地区长7段致密砂岩储集层实际资料处理结果表明,应用常规测井资料对岩石脆性指数进行评价,可以弥补由于阵列声波(或声波扫描)测井采集井数较少难以开展岩石脆性指数平面分布研究的不足,为致密砂岩油气"甜点"优选提供技术支持。Brittleness index of rock is an important factor for volume fracturing design of tight sandstone reservoir.This paper presents two logging evaluation methods for brittleness index—the rock elastic parameter method and the mineral composition method,and by means of rock mechanics experiment and whole-core X-ray diffraction analysis calibration,develops conventional logging-based multi-mineral model to get the brittleness index of tight sandstone reservoir.The processing result of data from Chang-7 tight sandstone reservoir in Longdong area of Ordos basin shows that using conventional logging data to evaluate the brittleness index of rock could provide technical support for optimizing selection of ＂dessert＂ of the tight sandstone reservoir by making up the shortages in difficult study of plane distribution of rock brittleness index due to fewer wells collecting array acoustic or acoustic scanning logging data.

关 键 词：致密砂岩储集层 脆性指数 多矿物模型 岩石力学 

分 类 号：TE125.1[石油与天然气工程—油气勘探] P631.824[天文地球—地质矿产勘探]