非平衡钻井条件下气测录井参数校正

平衡钻井条件下，气测录井参数可以真实地反映地层含气情况，而欠平衡或过平衡钻井由于压差原因，对气测录井参数有直接影响。从非平衡钻井对气测录井参数影响角度出发，通过对钻井压差与气测录井参数关系的分析与研究，探讨了现今常用的气测录井全烃及烃组分的校正方法，如压差回归校正法，井间对比法和逐层对比校正法；分别阐述了检测参数与各种参数校正方法的校正参数之间的关系、校正公式和校正过程。上述分析结果为非平衡钻井条件下，气测录井参数的标准化校正提供了理论依据，对实际应用具有普遍的指导意义。

Gas logging parameter calibration under non-balance drilling condition

Under balance drilling condition, gas-logging parameters can truly reflect formation gas bearing condition, while under-balanced or over-balanced drilling have direct effects on gas logging parameters due to the pressure difference. In view of the effects of non-balance drilling on gas logging parameters, the paper discussed the common used calibration methods of total gas and hydrocarbon compositions by studying the relationship between drilling pressure differences and gas logging parameters, such as pressure difference regression calibration, inter-well correlation and zone by zone calibration methods, and stated the relationships between detected parameters and calibration parameters with various calibrated ways, calibration equations and processes. The above analysis results have provided the theoretic basis for standardized calibration of gas logging parameters under non-balanced drilling condition and have general guiding meaning for practice application.