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3D Explorer仪器(3DEX~(TM))是根据测量的电阻率各向异性在层状砂泥岩层序中作低阻储层评价的。应用3DEX~(TM)下井仪可以减少不确定因素,识别出数百英尺的附加产油层。同时,多分量测量精度的显著改善以及仪器原理和数据处理的进步,扩大了仪器可靠运行的环境,除了电阻率各向异性外,还可以精确确定地层结构倾角和方位。在倾角以及成像仪器遇到问题(油基泥浆、不规则井眼、软地层)的环境中,应用该仪器就显得尤其重要。多分量感应仪器以多频聚焦(MFF)为基础引入新的处理技术,可以减少环境影响并且简化数据对地层参数的依赖性。经过MFF处理可以有效去除井眼的影响。本文展示了几个低阻储层评价的成功案例及裂缝特性分析,也回顾了在岩石物性分析中电阻率各向异性的通用方法。
The 3D Explorer instrument (3DEX ™) is based on the measured resistivity anisotropy as a low resistivity reservoir in layered sandstone sequences. The 3DEX ~ (TM) Downspout reduces uncertainties and identifies hundreds of feet of additional pay zones. At the same time, the remarkable improvement of multi-component measurement accuracy, as well as the improvement of instrument principle and data processing, have expanded the environment for reliable operation of the instrument. In addition to anisotropy of resistivity, the inclination and azimuth of formation can be precisely determined. The application of this instrument is of particular importance in the context of inclinations and imaging equipment problems (oil-based muds, irregular boreholes, soft formations). Multi-component induction instruments introduce new processing techniques based on multi-frequency focusing (MFF) to reduce environmental impact and simplify data dependency on formation parameters. After MFF treatment can effectively remove the impact of the wellbore. This paper presents the success stories of several low resistivity reservoirs and the analysis of fracture characteristics. It also reviews the general method of resistivity anisotropy in petrophysical analysis.