自然伽马测井曲线的分析与反褶积校正

本文探讨系统响应函数对自然伽马测井曲线所造成的影响及反褶积校正的方法,从而使受围岩影响而降低了幅值的薄层曲线恢复原来的异常,改善了厚层曲线在界面处的陡度,以利于分层定厚、地层对比和进一步作各种定量的数字解释。

THE ANALYSIS AND DECONVOLUTION CORRECTION OF NATURAL GAMMA-RAY LOGS

Natural gamma-ray logs play an important role in the geologic interpretation of well logging. The primary application of these logs is lithology identification. It is an aid in identifying potentially productive strata, an index to shale content in formation and ash content in coal, a guide to correcting other well logs, and an important means in correlation.This paper discusses how the system response function influences the gamma-ray logs, and makes a deconvolution correction to it, i. e, to calculate and correct the digitized gamma-ray data with a computer at every depth of the well, so as to recover the thin bed amplitude decreased by the influence of the strata and to improve the gradient at the boundary of the thick bed. This is advantageous to the division of the ore bed and the determination of the bed thickness.