摘要
针对含油气盆地内油气分布与富集程度的定量描述问题,提出综合利用录井显示、测井解释、试油结论等资料的含油信息定量描述油气分布的方法;利用该方法计算沾化凹陷探井的油气集聚值,并分析油气的纵、横向分布特征。结果表明:按照3种资料可信度高低的优先顺序(依次为试油结论、测井解释、录井显示)进行计算可获得较真实的油气聚集值;油气聚集值可定量描述研究区油气的分布与富集情况,从而为勘探选区和钻探目标优选提供依据;沾化凹陷纵向上沙四段油气聚集值最高,应是油气勘探的重要方向;横向上北部深洼区(义283—义178一带)油气聚集值较高且连片分布,是沙四段最为现实的油气增储区块;该方法适用于钻井较多的中—高程度探区油气分布描述与增储区块预测。
In order to quantitatively describe oil-gas distribution and enrichment,a method for calculating enrichment value( EV) based on oil-bearing grade given by well logs,logging interpretations and well test data was established. The EVs of exploratory wells in Zhanhua sag were calculated and the distribution of oil and gas in paleogene was analyzed. According to the result,the robust EVs could be gained when higher credibility data is chosen preferentially. The EVs can be used to describe oil-gas distribution and enrichment and can guide to choose exploration district and drilling targets. According to the longitudinal distribution of the EVs,the fourth section of Shahejie Formation( Es4) in Zhanhua sag is the richest section in oil and gas. Horizontally,the richer area of oil and gas locates at deep area in north Bonan sub-sag( well Yi283-Yi178 area). It is suggested that the Es4 may be the most important exploration section,while the deep area in the north Bonan subsag may be the surest oil and gas reserve area.
出处
《中国石油大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2016年第1期35-41,共7页
Journal of China University of Petroleum(Edition of Natural Science)
基金
国家重大专项(2011ZX05006-003)
中央高校基本科研专项(15CX02003A)
关键词
油气分布
富集程度
定量描述
沾化凹陷
oil-gas distribution
enrichment degree
quantitative description
Zhanhua sag
