CAJ | 학술논문

关于砂岩底水油藏，无论是在见水时间、开发机理，还是临界产量等方面，均有大量的研究成果。但以上方法在综合考虑抑制底水锥进效果和油田开发效益方面均不是很理想。为解决该问题，A. K. Wojtanowicz提出了井底循环排液（DWL）技术开发底水油藏的新方法，不仅提高了油井的临界产量，而且延长了油井的有效生产时间。基于DWL技术建立机理模型，利用油藏数值模拟方法分析上部射孔段日产液速度，下部射孔段注入与排出液体速度，注入与排出射孔段距离和油层与底水厚度比对油藏采出程度的影响。实例证明：上部射孔段日产液速度和下部射孔段注入与排出液体速度相等，注入与排出射孔段距离较大，油层与底水厚度比较小时，油藏的开发效果较好。为利用DWL技术合理、高效地开发底水油藏提供了理论基础。
관우사암저수유장，무론시재견수시간、개발궤리，환시림계산량등방면，균유대량적연구성과。단이상방법재종합고필억제저수추진효과화유전개발효익방면균불시흔이상。위해결해문제，A. K. Wojtanowicz제출료정저순배배액（DWL）기술개발저수유장적신방법，불부제고료유정적림계산량，이차연장료유정적유효생산시간。기우DWL기술건립궤리모형，이용유장수치모의방법분석상부사공단일산액속도，하부사공단주입여배출액체속도，주입여배출사공단거리화유층여저수후도비대유장채출정도적영향。실예증명：상부사공단일산액속도화하부사공단주입여배출액체속도상등，주입여배출사공단거리교대，유층여저수후도비교소시，유장적개발효과교호。위이용DWL기술합리、고효지개발저수유장제공료이론기출。
Studying from water breakthrough time, development mechanism, critical production, there are a lot of achievements about sandstone bottom water reservoir. However, the above methods are not effective to inhibit bottom water coning, or oilfield de-velopment benefit. In order to solve these problems, A. K. Wojtanowicz put forward the bottom hole circulating drainage (DWL) technology to exploit bottom water reservoir. This method not only improved the critical production, but also prolonged the net pro-duction time of oil wells. Based on DWL technology, mechanism model was established. By using reservoir numerical simulation method, this paper analyzed recovery influential factors, such as daily fluid production rate of upper perforated interval, injection and the discharged liquid velocity of lower perforated interval, perforation length of injection and drainage, ratio of reservoir thick-ness and bottom water thickness and its effects on recovery. Examples show that daily fluid production rate of upper perforated in-terval is equal to injection and discharged liquid velocity of lower perforated interval. When injection distance and drainage dis-tance are larger, and ratio of reservoir thickness and bottom water thickness is smaller, reservoir development effects are better. This result provides theoretical basis for reasonably using DWL technology and effectively developing bottom water reservoir.