柴达木盆地跃西地区藻灰岩储层的测井识别  

IDENTIFICATION OF ALGAL LIMESTONE RESERVOIR WITH LOGGING IN YUEXI AREA,QAIDAM BASIN

作　　者：李延丽[1] 苟迎春[1] 曹正林[1] 孙秀建[1] 

机构地区：[1]中国石油勘探开发研究院西北分院,甘肃兰州730020

出　　处：《西南石油大学学报（自然科学版）》2009年第5期56-60,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石油天然气股份公司科技攻关项目(2008D-0707-03)

摘　　要：藻灰岩在柴达木盆地跃西地区第三系湖相地层中广泛分布,是该区碳酸盐岩储层中最重要的一类油气储层。该类储层储集性能优良,单井获高产工业油流,是跃西地区近期一个新的勘探领域。但由于藻灰岩厚度薄,且与多种岩性互层沉积,加之藻灰岩本身具有多样性,导致了该类储层识别难度的加大和评价精度的降低。从藻灰岩测井响应特征入手,在应用岩性测井曲线与声波测井曲线重叠,刻画识别储层的基础上,再用三孔隙度测井曲线重叠识别藻灰岩,效果较好,为识别此类复杂储层提供了一种新的思路、方法。Algal limestone is widely distributed in Tertiary lacustrine strata in the west part of Qaidam Basin,and is one of the most important carbonate reservoir types.Reservoir property of the types is excellent,and single well productivity is high,so it is a new exploration field in Yuexi area.But algal limestone is thin in thickness,interbedded sedimentary rocks,and diversity in lithologies,so it is rather difficult to identify and evaluate.In this paper,starting from logging response characteristics of algal limestone,based upon identifying reservoir with lithologic logging overlapping with acoustic logging curve,algal limestone is identified by using 3-porosity curves overlapping each other.This method has good effect and provide a new thought and method for identifying the kind of complicated reservoir.

关 键 词：藻灰岩储层 测井识别 曲线重叠 跃西地区 柴达木盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]