注水剖面测井精细解释

Fine Interpretation of Water Injection Profile Logging.

注水剖面测井由于受到示踪剂微球颗粒直径大小、同位素粘污以及储层长期注水造成的内部孔隙喉道结构的变化等多种因素的影响 ,使常规测井解释遇到非吸水层位的同位素污染、主力吸水层同位素异常幅度太低、射孔井段的腐蚀穿孔或窜槽吸水等问题的困扰 ,致使测井解释精度大大降低。提高测井解释精度应注重同位素污染校正中水流方向确定和污染系数的校正 ;正确划分吸水层 ;对于非均质较为严重的储层必须开展厚层细分 ;对测井系列要不断地改进和完善。

Water injection profile logging is often effected by diameters of micrograins of tracer, radioactive contamination and changes of inner pore constructions resulted from the long time water injection. Thereby, traditional log interpretations are quite difficult in isotope contamination of nonwaterinjection layers, lower abnormal amplitudes of isotope in major water injection beds, perforated layers corrosion and channelings, which lows the log interpretation accuracy. In order to improve log interpretation accuracy, we must focus on determination of water flow direction, contamination factor correction, correct zonation of injection layers, subdivision of thick layers with high inhomogeneity. Furthermore, we should improve and complete the logging tools. Practical examples are given.