一种新型的高分辨率双侧向测井方法

针对目前广泛使用的常规双侧向测井仪分辨率不高、电极系很长、不便于现场组合测井等缺点,一种新型的高分辨率双侧向测井仪被提出、设计、研制完成并投入生产.介绍了高分辨率双侧向的电极系结构、工作原理,并通过数值模拟结果阐述了它的分层能力、探测深度和围岩、侵入及井眼等影响.结果表明,高分辨率双侧向在大大缩短了仪器长度的情况下,同时取得了高分辨率和深的探测深度;尽管高分辨率双侧向井眼影响较大,但在大多数情况下高分辨率双侧向可以取代常规双侧向用于常规测井.高分辨率双侧向测井仪是快速与成像测井系统EILog-05最重要的井下仪之一.

A New High Resolution Dual Laterolog Logging Method

The widely used conventional dual laterolog tools have their disadvantages of poor vertical resolution and too long electrode sonde which is not convenient for combination logging.To overcome these disadvantages,a new High Resolution Dual Laterolog(HRDL) tool has been suggested,developed,and put into oilfield application on a large scale.Its electrode sonde configuration and operation principle are presented.Its vertical resolution,depth of investigation and environmental effects including shoulder,invasion and borehole effects are discussed by numerical results.It shows that although the HRDL tool is much shorter than conventional dual laterolog tools and has more complex borehole effects,it can still obtain both high resolution and deep measurement,and can replace the extensively used conventional dual laterolog tools in most cases.HRDL tool is one of very important downhole tools of EIlog-05 logging system,this!paper can help logging engineers and analysts to understand its characteristics of investigation and provides references in logging data processing and interpretation.