CAJ | 학술논문

建立上下3层介质的水平井模型,采用三维有限元方法研究水平井双侧向测井响应.结果表明,水平井双侧向测井响应受井眼位置的影响,井眼位于目的层不同垂向位置时,非厚层的双侧向测井响应差异明显;不同层厚及围岩条件下水平井双侧向测井响应与直井差异较大,且在无侵入条件下深浅侧向电阻率显示明显的幅度差异.在三维数值计算的基础上,建立水平井双侧向测井层厚及围岩影响校正图版,并据此研究水平井双侧向测井层厚及围岩影响校正快速计算方法.利用快速校正公式计算得到的校正图版与基于三维数值计算的校正图版具有很好的相似性,说明该方法可快速、有效地实现水平井双侧向测井响应的层厚及围岩校正.图5表4参15
건립상하3층개질적수평정모형,채용삼유유한원방법연구수평정쌍측향측정향응.결과표명,수평정쌍측향측정향응수정안위치적영향,정안위우목적층불동수향위치시,비후층적쌍측향측정향응차이명현;불동층후급위암조건하수평정쌍측향측정향응여직정차이교대,차재무침입조건하심천측향전조솔현시명현적폭도차이.재삼유수치계산적기출상,건립수평정쌍측향측정층후급위암영향교정도판,병거차연구수평정쌍측향측정층후급위암영향교정쾌속계산방법.이용쾌속교정공식계산득도적교정도판여기우삼유수치계산적교정도판구유흔호적상사성,설명해방법가쾌속、유효지실현수평정쌍측향측정향응적층후급위암교정.도5표4삼15
Based on horizontal well modeling with 3 layers, the 3D finite element method is used to simulate the response of dual laterolog in horizontal wells. The modeling re.suits show that the response of the dual laterolog is obviously influenced by the borehole position in the target formation. When the borehole position varies, the dual laterolog response of non-thick formation changes. Under conditions of different layer thicknesses and/or different borehole positions, the responses of dual laterolog in horizontal wells are different from that in vertical wells. The deep and shallow resistivity of the dual laterolog exhibits an apparent amplitude difference for the non-invaded zone in horizontal wells. Based on the 3D numerical simulation results, the correction charts of dual laterolog responses for layer thickness and shoulder bed are generated, and a fast calculation method for resistivity correction in horizontal wells is proposed. The correction results from proposed method agree well with those from 3D numerical computation. The fast correction method is rapid and effective in layer thickness and shoulder bed correction.