摘要
油田勘探开发后期,迫切需要对0.2m薄层和薄互层进行定量评价,常规双侧向的纵向分辨率为0.6-0.9m,难与其它高分辨率测井曲线匹配,为此采用二维有限元方法进行数值模拟,对电极系进行优化设计,并分析了仪器的探测深度、纵向分辨率、层厚影响以及井眼影响,计算了连续测量曲线,并对数字聚焦后得到的深浅侧向电位场合电流线分布进行了数值模拟.理论分析和现场试验均表明,优化的电极系的纵向分辨率能够达到0.2 m,深浅侧向的探测深度分别为1.15 m和0.38m,但是仪器受井眼影响大,必须进行合理的实时井眼校正.
In the later period of oil field production,there has a strong demond for evaluation the thin layer with a thickness of 0.2 m.The vertical resolution of normal dual laterolog tools（DLL）is about 0.6-0.9m.It is difficult to match these DLL resistivity curves with other high-resolution logging curves.In this paper,a 2D finite element analysis method was used to optimize the DLL electrode system. The depths of investigation,vertical resolution,effects of layer thickness,open-hole diameter and mud resistivity on the tool response had been researched. Continuous resistivity curves were also calculated.The potential field and current distribution of synthetic-focusing DLL logging method had been simulated.The theoretical results and field tests show that the developed high-resolution DLL tool has a vertical resolution of 0.2 m.The results also show that the open-hole diameter and mud resistivity has has relatively high effect on the logging curves.These effects should be real-time corrected.
出处
《地球物理学进展》
CSCD
北大核心
2014年第5期2251-2257,共7页
Progress in Geophysics
基金
大庆油田有限责任公司重大科技专项(dqc-2010-cs-ky-003)和(dqc-2011-cs-ky-001)联合资助
关键词
高分辨率
双侧向
数值模拟
high resolution
dual laterolog
numeric simulation
