多个连通缝洞体的酸压水平井产能预测  

Study on prediction of connected multiple fractured acid fracturing of horizontal well productivity

作　　者：张贺举 王用军 周晓林 吴土荣 王誉钧 

机构地区：[1]中海油钻采工程研究院湛江实验中心,广东湛江524057 [2]中海油钻采工程研究院地球物理研究所,广东湛江524057

出　　处：《油气地质与采收率》2011年第4期86-89,117,共4页Petroleum Geology and Recovery Efficiency

基　　金：国家自然科学基金项目"缝洞型碳酸盐岩油气藏酸蚀蚓孔基础理论研究"(50774064)

摘　　要：由于缝洞型储层储集空间的特殊性,不能应用均质油藏的渗流理论来预测水平井产能。在假设基质不具备储集能力的前提下,从油藏物质平衡基本原理出发,建立了适用于缝洞体系的产能预测模型。该模型不但考虑了缝洞体系通过酸蚀裂缝与水平井井筒连通并向井底供液,还考虑了流体在水平井井筒段流动存在摩阻压降和加速压降的情况。从180d的模拟结果可以看出:在生产初期,考虑水平段压降的日产量与实际产量相近;而不考虑压降时日产量比实际产量增加了3%左右。表明该模型可为准确预测缝洞体酸压后产能提供参考。Due to the particularity of the fractured reservoir space,the homogeneous reservoir of seepage theory can not be applied to predict horizontal well productivity.When assuming the matrix does not have the reservoir ability,a model for productivity prediction, which is used in the fractured system,is established based on the basic principle of reservoir matter balance.In this model, not only the acid corrosion cracks and horizontal well connected to the bottom of the shaft,but also the fluid flow in horizontal wellbore existing for friction pressure drop and speed up the pressure drop are considered.The 180 days of the simulated results can show that,in the early period,the daily production is similar to the actual production when the level of pressure drop is considered. On the contrary,the daily production increased by 3%.It shows that this model can provide reference for accurate prediction on the productivity of the acid fractured horizontal well.

关 键 词：缝洞体 酸压 水平井产能 碳酸盐岩 预测模型 

分 类 号：TE313.6[石油与天然气工程—油气田开发工程]