CAJ | 학술논문

山西聚煤区煤成游离气目的层段自然伽马曲线有高值异常，测井解释岩性不准确。为了解决该问题，首先分析比对研究区内3口有自然伽马能谱测井资料的钻井，然后结合测井曲线纵向分辨率匹配技术，确定去铀伽马曲线与自然伽马曲线相关关系目标函数；并利用差分进化算法寻优在频率域确定滤波器，构建了新的去铀伽马曲线。利用该方法获得的曲线较平滑，避免了平滑滤波中丢失薄层信息，与实测去铀伽马曲线相关系数较高。将计算模型推广应用于研究区其他气井，计算结果与岩心分析资料一致，较好地解决了游离气高伽马储层段泥质含量计算问题。
산서취매구매성유리기목적층단자연가마곡선유고치이상，측정해석암성불준학。위료해결해문제，수선분석비대연구구내3구유자연가마능보측정자료적찬정，연후결합측정곡선종향분변솔필배기술，학정거유가마곡선여자연가마곡선상관관계목표함수；병이용차분진화산법심우재빈솔역학정려파기，구건료신적거유가마곡선。이용해방법획득적곡선교평활，피면료평활려파중주실박층신식，여실측거유가마곡선상관계수교고。장계산모형추엄응용우연구구기타기정，계산결과여암심분석자료일치，교호지해결료유리기고가마저층단니질함량계산문제。
Although a coal strata gas reservoir in Shanxi region has a high value of natural gamma, it is not caused by shale content cannot reflect the true value of the clay.In this paper, the writers examined 3 wells that have the Natural Gamma Ray Spectrometry logging data.On the basis of the longitudinal resolution matching tech-nology, we get the correlation objective function of CGR and GR curve.And then we use the DE ( differential evo-lution algorithm) in the frequency domain to determine the filter to build a new without uranium gamma curve.The results are in good agreement with the original CGR curve.Then we applied the model to the other wells without the Gamma Ray Spectrometry log data, obtained good results.