CAJ | 학술논문

入流控制装置（Inflow Control Device，ICD）近年来在水平井分段完井中应用日益广泛，但目前针对ICD完井建立的半解析耦合模型无法准确反映水平井端部效应，在ICD优化设计过程中对于目标入流剖面的选择缺乏依据。为此，首先引入了基于势的叠加原理和镜像反射原理的油藏渗流模型用以准确反映水平井入流特征，建立了适用于非均质底水油藏水平井ICD完井的稳态耦合模型；之后考虑油井不同的生产制度，给出了非均质油藏水平井ICD完井优化目标入流剖面的确定方法，并以喷嘴型ICD为例对ICD设计流程进行了具体描述，对最优非均匀ICD和最优均匀ICD计算结果进行了对比分析。结果表明：ICD优化设计与生产制度有很大关系，均匀入流剖面并非总是理想的入流剖面；非均匀ICD控流效果要优于均匀ICD，但均匀ICD完井对井底流压有较宽的适应性；高生产压差有助于发挥喷嘴型ICD的控流优势。
입류공제장치（Inflow Control Device，ICD）근년래재수평정분단완정중응용일익엄범，단목전침대ICD완정건립적반해석우합모형무법준학반영수평정단부효응，재ICD우화설계과정중대우목표입류부면적선택결핍의거。위차，수선인입료기우세적첩가원리화경상반사원리적유장삼류모형용이준학반영수평정입류특정，건립료괄용우비균질저수유장수평정ICD완정적은태우합모형；지후고필유정불동적생산제도，급출료비균질유장수평정ICD완정우화목표입류부면적학정방법，병이분취형ICD위례대ICD설계류정진행료구체묘술，대최우비균균ICD화최우균균ICD계산결과진행료대비분석。결과표명：ICD우화설계여생산제도유흔대관계，균균입류부면병비총시이상적입류부면；비균균ICD공류효과요우우균균ICD，단균균ICD완정대정저류압유교관적괄응성；고생산압차유조우발휘분취형ICD적공류우세。
The Inlfow Control Device (ICD) has been increasingly used in staged completion of horizontal wells in recent years. However, the semi-analytical coupling model built for ICD completion cannot accurately relfect the end effect in horizontal wells, and there is a lack of basis for the selection of target inlfow proifle during ICD optimization design. Therefore, a reservoir seepage model was ifrst introduced based on potential superposition principle and specular relfection principle to accurately relfect the inlfow features of horizontal wells, and a steady state coupling model was built which was suitable for ICD completion of heterogeneous bottom water reservoirs. Thereafter, in view of different production systems of oil wells, this paper provides the determination method for optimized target inlfow proifle of horizontal wells in heterogeneous reservoirs completed with ICD, describes in detail the design procedure of ICD taking nozzle-type ICD as an example and compares and analyzes the calculation results of optimal non-uniform ICD and optimal uniform ICD. The result shows that the optimized design of ICD is closely related to production system and uniform inlfow proifle is not always the ideal inlfow proifle.The lfow control effect of non-uniform ICD is superior to that of uniform ICD, but well completion with uniform OCD is more widely adaptable to the bottom hole lfow pressure.The high production pressure difference helps bring to play the lfow control advantage of nozzle-type ICD.