Agadem区块Yogou地层特征分析

摘要

The Agadem block structurally belongs to the Termit Basin,which is part of the West Africa Rift,and locates in the east part of the Republic of Niger. In 2008 the CNODC got the exploration permit of Agadem and made rich oil and gas founding in the Sokor Sandy Alternances formation after six years of exploration. A breakthrough was performed in Yogou formation in 2012 and testing results show the production rate is 31.2~403.2 BBL/D,the viscosity of the oil is 11.6~46.3 cP@50℃ and the API weight is 23.0~40.1. The characteristics of Yogou formation are analyzed in this paper on the basis of regional tectonic evolution and hydrocarbon reservoir forming to provide theoretical guidance to prevent accidents such as hydrocarbon emplacement,oil and gas blowing out,and borehole sloughing during drilling.%Agadem区块位于尼日尔共和国的东部,构造上属于Termit 盆地,是西非裂谷带的一部分.2008年6月中石油CNODC获得该区块的勘探权.经过6年的勘探,在早第三纪Sokor Sandy Altanances 地层中发现了丰富的油气资源.2012年,在Yogou地层中也发现了丰富的油气资源.经测试,折算日产油31.2~403.2BBL/D,原油粘度11.6~46.3 cP@50℃,API 重度23.0~40.1.本文结合该区域构造演化、油气成藏等条件,分析了Yogou地层的特征,为工程人员预防油气侵、井喷及井壁坍塌等钻井事故提供了理论依据.