摘要
哈萨克斯坦肯基亚克地区的盐上油田油层埋藏浅、油质稠,开发中后期新井油层普遍水淹,水淹后测井曲线发生了明显的变化,这种变化与地层的韵律组合有关。为了准确识别水淹层,对该区水淹机理进行了分析,通过试验和对生产实际数据的分析研究认为该区水淹成因是边水水淹。由于油层浅,初始压力低,自然能量开采后压力降低严重,储层物性变差。为了补充亏空的压力,边水逐渐推进,部分原始束缚水变为可动水。在钻井过程中淡水钻井液对油层是低阻侵入,感应电导率出现负幅度差;对于水淹层是高阻侵入,感应电导率出现正幅度差,依据阵列感应测井不同探测深度的特性可以较好地反映储层的侵入状况,从而定性识别油层是否水淹,解释过程中建立了定量判别水淹级别图版。
The Upper Salt Lake oilfield located in Kenkiyake region of Kazakhstan is characterized with shallow buried depth and heavy oil properties.Water flooding is common in new wells during middle-late stage of field development.The apparent changes of well logging curves after waterflooding were related to formation.For the purpose of identifying the water flooded formations,the reasons of waterflooding were analyzed.Based on the analysis of experiments and actual production data,the edge water was the reason for waterflooding in this region.The initial reservoir pressure was low due to shallow formation.The formation pressure drops greatly after a period of depletion development,causing the deterioration of formation properties.The edge water were fingering gradually to provide pressure support,causing connate water movable.During drilling,the fresh water mud is low resistivity invasion in oil zones,causing the negative separation in induction conductivity and positive separation in water flooded zones.The induction electrical log can represent the formation invasion properly so that whether the formations were water flooded can be identified qualitatively.The waterflooding type curves were established in the interpretation process.
出处
《石油钻探技术》
CAS
北大核心
2007年第6期101-104,共4页
Petroleum Drilling Techniques
基金
中国石油天然气集团公司科研项目"海外非常规油藏开发潜力分析与最优开发方式研究"(编号:07G6020)部分内容
关键词
浅层
稠油油藏
水淹
测井
电阻率
哈萨克斯坦
shallow layer
viscous oil reservoir
watered out
well logging
resistivity
Kazakstan
作者简介
刘福利（1965-），1988年毕业于大庆石油学院测井专业，在读博士研究生，高级工程师，长年从事海外油田测井解释工作。联系电话：（010）62093038
