底水油藏水平井分段完井产液剖面预测研究

Study on inflow profile prediction of horizontal well segment completion in bottom water reservoir

针对底水油藏水平井分段完井技术应用的产液剖面预测问题,基于分段完井技术原理,利用Green源函数和叠加原理,建立了耦合油藏渗流与井筒环空流动影响的底水油藏水平井分段完井产液剖面预测模型,并给出了模型的数值求解方法。利用该预测模型,可分析分段完井产液剖面调控特征,确定各段需控制的合理产液速度,实现底水油藏水平井控水稳油的目标。结果表明,模型可快速准确地预测水平井分段完井产液剖面;分段完井产液剖面调控应综合考虑油藏各区域供液能力及控水稳油目标,在满足油藏条件及经济技术要求的前提下,采用多分段且分段趋于均匀有利于减小水平井变质量流压降的影响。

In view of predicting the inflow profile during the application of horizontal well segment completion technology in bottom water reservoirs,an inflow predict model based on the principle of well segment completion technology was established by coupling the reservoir flow model and the pipe annulus flow model,then the solution is presented in this paper.The model is capable of analyzing the profile control features of horizontal well segment completion,deciding the suitable production rate for each segment that should be controlled to delay the water in bottom water reservoirs.The results indicate that the model can quickly and accurately predict the liquid inflow profile of segmented completion horizontal wells,and it's necessary to consider each part of the reservoir's production contribution and the goal of delaying water.In addition,to reduce the heel-toe effect of the horizontal well,it's necessary to segment the wellbore into as much even parts as possible and more uniformly within the economic and technical limits of this technology and the limits of reservoir conditions.