测井曲线融合方法研究及其在分层中的应用

地质分层时单采用一条测井曲线存在着局限性和多解性,为此,将多条测井曲线融合成一条无量纲曲线,突出多条测井曲线的公共信息,更好地反映地层的真实性,然后对融合曲线进行活度分析,分层的效果更加明显.曲线融合的实质是在信号检测和估计理论的基础上建立多条测井曲线数据融合的数学模型.在进行融合之前,要对测井资料进行异常点剔除和归一化处理,以消除或减弱测井信号中的随机信息干扰.应用这种方法得到的融合曲线减少了单一观测资料中的偶然误差,提高了融合测井资料在地质分层应用中的可信度.

Study on integration of multiple logging curves and its application in geological stratification

There are limitation and multiplicity of solutions in the geological stratification by using single logging curve.For this reason,multiple well-logging curves is integrated into a nondimensional curve,this integrated curve can reflect the common information of these logging curves and the real information of stratum.So the better geological stratification result will be obtained using it than using single logging curve.The key to the integration of logging curves is establishing a mathematical model for integrating multiple logging curves based on signal detection and estimation theory.Before the integration of the logging curves,the abnormal points rejecting and normalization processing of the logging data should be finished to eliminate andreduce the effect of the random disturbance in the logging data.The application of the integrated curve improves the reliability of the geological stratification using logging data.The integrated curve has also application value in analysis of sequence interface,identification of lithology and forecast of sedimentary microfacies.