CAJ | 학술논문

高分辨率感应测井通过不同探测深度曲线的分离程度分析泥浆侵入状况和地层的渗透性.采用三层有侵正演模型数值模拟了阶跃和渐变侵入地层中高分辨率感应测井的响应特征.阶跃侵入地层中,侵入带电阻率与地层电阻率比值小于0.5时,6条不同探测深度曲线呈正序关系,读数从低到高;比值大于2.0时,探测深度由浅到深,曲线呈反序关系;比值为0.5～2.0范围时,浅侵入,曲线出现乱序,只有深侵入曲线才有合理的正序或反序关系.渐变侵入地层中,侵入带电阻率与地层电阻率比值为0.5～2.0范围时,过渡带变化对读数影响很小,比值大于2.0或小于0.5,过渡带对10 in(非法定计量单位,1 ft=12 in=0.304 8 m,下同)和20 in探测深度曲线影响最大,对90 in和120 in曲线影响很小.以上结论可应用于实际测井中高分辨率感应测井曲线分离的特性分析.
고분변솔감응측정통과불동탐측심도곡선적분리정도분석니장침입상황화지층적삼투성.채용삼층유침정연모형수치모의료계약화점변침입지층중고분변솔감응측정적향응특정.계약침입지층중,침입대전조솔여지층전조솔비치소우0.5시,6조불동탐측심도곡선정정서관계,독수종저도고;비치대우2.0시,탐측심도유천도심,곡선정반서관계;비치위0.5～2.0범위시,천침입,곡선출현란서,지유심침입곡선재유합리적정서혹반서관계.점변침입지층중,침입대전조솔여지층전조솔비치위0.5～2.0범위시,과도대변화대독수영향흔소,비치대우2.0혹소우0.5,과도대대10 in(비법정계량단위,1 ft=12 in=0.304 8 m,하동)화20 in탐측심도곡선영향최대,대90 in화120 in곡선영향흔소.이상결론가응용우실제측정중고분변솔감응측정곡선분리적특성분석.
The separation extent of different curves of depth of investigation in array induction logging shows the conditions of mud invasion and formation permeability. The response character of HDIL in step and gradual transition invasion formation are simulated using three-layer forma-tion model with invasion. In step invasion formation, when the ratio of invasion resistivity to for-mation resistivity is less than 0.5, 6 different investigation depth curves present normal order from shallow to deep investigation, the reading of the shallow investigation is less than the deep one. When the ratio is greater than 2.0, investigation curves show opposite order with the order of less than 0.5. When the ratio is between 0.5 and 2.0, curves are abnormal order in shallow in-vasion formation, only in deep invasion formation the curves appear reasonable order. In gradual transition formation, when the ratio is between 0.5 and 2.0, the change of transition zone has lit-tle effect on responses. When the ratio is greater than 2.0 or less then 0.5, 10 in and 20 in curves are changed obviously, but influence on 90 in and 120 in curves is still small. These conclusions can be used to analyze the separate character of high definition induction logging curves.