摘要
从区域地质背景出发,结合岩心观察、粒度分析、镜下鉴定结果及测井曲线形态等进行综合分析表明,位于蚌湖向斜南斜坡的广北油田Eq341沉积时属半深湖—深湖背景下的湖底扇相沉积,可细分为内扇、中扇和外扇三个亚相,其中中扇可细分出辫状沟道、沟道间和扇中前缘三个微相。利用钻井及地震资料描述了该扇体的空间组合及平面分布特征,并对其成因作了初步分析。结合测试资料分析,有辫状沟道的中扇为有利储油相带,并指出了该类扇体发育的有利区带,为下步岩性油藏的勘探指出了方向。
Based on integrated study on regional geologic setting, together with core observation, granulometric analysis, microscopic identification results and types of well logging curves, it is indicated that Eq341 ofGuangbei Oilfield, which is located on the southern slope of Banghu syncline, is sublacustrine fan faciessedimentation deposited under halfdeep and deep lake sedimentary environment. The sublacustrine fanfacies sedimentation can be divided into three subfacies, including internal fan, middle fan and outer fan.The middle fan can be further divided into three microfacies, including braided channel, inter channel andfront edge of middle fan. The spatial combination and areal distribution characteristics have been studied anddescribed with well drilling and seismic data,and a preliminary analysis on its origin has been conducted. Together with analysis of production testing data, it is indicated that the middle fan with braided channel isfavorable oilsaturated facies. Through this study, the exploration targets for lithologic oil reservoirs have been pointed out.
出处
《江汉石油职工大学学报》
2003年第3期27-29,共3页
Journal of Jianghan Petroleum University of Staff and Workers
关键词
潜江凹陷
广北油田
湖底扇
沉积特征
概率图
Sub-lacustrine Fan
Granulometric Analysis
Probability Graph
Guangbei Oilfield
Qian-3 Member
Qianjiang Depression.
