论文部分内容阅读
胜利油区主力油田已整体进入特高含水开发阶段,系列取心资料和矿场测试数据表明,随着注水开发的深入,中高渗透砂岩油藏储层物性参数变化明显,影响了油藏油水运动和剩余油分布规律,应在油藏数值模拟中反映这种储层参数的时变效应,以提高剩余油描述精度。通过开展取心资料分析、室内实验研究、传统黑油模型改造、油藏模拟软件编制等工作,建立了各向渗透率、相对渗透率曲线随时间连续性变化的数学模型,形成了适用于中高渗透砂岩油藏的物性时变数值模拟技术。该技术提高了特高含水期中高渗透砂岩油藏数值模拟研究成果的精度,已在孤岛油田中一区取得了良好的应用效果,数值模拟预测的剩余油分布状况与实际情况吻合程度高,预测新钻井饱和度的精度显著提高,平均绝对误差仅为-2.2%。
The main oilfields in Shengli Oilfield have entered the development phase of ultra-high water cut. The series of coring data and the field test data show that with the development of waterflooding, the physical property parameters of middle and high permeability sandstone reservoirs change obviously, affecting the reservoir oil-water movement And the remaining oil distribution, the time-varying effect of such reservoir parameters should be reflected in reservoir numerical simulation to improve the description accuracy of residual oil. Through the coring data analysis, laboratory experiment, the traditional black oil model reconstruction and the reservoir simulation software compilation, a mathematical model was established to change the permeability and relative permeability curves with time continuity. TIME - VARYING NUMERICAL SIMULATION OF PERMEABLE SANDSTONE RESERVOIRS. This technique improves the accuracy of numerical simulation results of high permeability sandstone reservoirs in the ultra-high water cut stage and has achieved good application results in the middle and upper reaches of Gudao Oilfield. The remaining oil distribution predicted by numerical simulation is in good agreement with the actual situation. Prediction The accuracy of new drilling saturation is significantly improved, with an average absolute error of only -2.2%.