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多道数字频谱感应系统通过覆盖了宽频带的多个接收线圈采集到一组完整数据,应用该系统后,高分辨率感应测井改善了地层评价。探测深度的宽范围精确解释了储集岩中的侵入剖面。渗入带和过渡带评价使对油气运移性和真实地层电阻率R_t的预测更可靠,从而得出更准确的测井分析和储量估计。对仪器响应进行处理,能达到最优分辨率,使那些诸如由不规则井口尺寸和导电侵入引起的干扰影响的灵敏度降到最低。拟合分辨率曲线也可用于所有探测深度下的增强和规范的垂直分辨率。这一组完整数据能够合成其余现有感应仪的测量结果,可与邻井测井曲线做对比或进行现场研究。随着大角度钻井的增多,准确估计斜井或以显著视倾角穿透地层的井中地层电阻率是重要的,众多的接收器和宽频带使有可能在此环境下将仪器测量结果可靠地聚焦。经过处理的测井曲线会有类似于垂直穿透同一地层的井的测井曲线响应。数据的完整性确保了其他处理技术在未来的发展。综合其他测井和油藏信息,新感应测量结果将显著提高油藏评价能力。
A multi-channel digital spectrum sensing system acquires a complete set of data from multiple receive coils covering a wide frequency band. After applying this system, high-resolution induction logging improves the formation evaluation. The wide range of probing depths accurately explains the intrusive profile in reservoir rocks. Permeability bands and transitional zone assessments make the prediction of hydrocarbon migration and real-world resistivity R_t more reliable, leading to more accurate log analysis and reserve estimates. The instrument response is processed to achieve optimal resolution, minimizing the sensitivity of those effects such as interference caused by irregular wellhead size and conductive intrusion. Fitting resolution curves can also be used for both enhancement and normalized vertical resolution at all probing depths. This complete set of data can be used to synthesize the measurements of the rest of the existing sensors and can be compared with the next well logs or conducted field studies. As large-angle drilling increases, it is important to accurately estimate the formation resistivity in an inclined well or well that penetrates the formation with significant dip, and numerous receivers and widebands make it possible to reliably focus instrumental measurements in this environment . Logs processed will have a well-log response similar to that of a well vertically penetrating the same formation. The integrity of the data ensures the future development of other processing technologies. Combined with other well logging and reservoir information, the new sensing measurements will significantly improve reservoir evaluation capabilities.