管流模型概算法识别大孔道

Approximate calculation method to identify high permeable channel based on pipe flow model

杨艳 王业飞 郑家朋 骆洪梅 张鹏

中国石油大学（华东）石油工程学院，山东 青岛 266580 中国石油冀东油田公司钻采工艺研究院，河北 唐山 063004

College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China Research Institute of Drilling and Production Technology, Jidong Oilfield Company, PetroChina, Tangshan 063004, China

在疏松砂岩油藏注水开发中后期，大孔道的存在是进一步提高采收率的主要制约因素。文中针对边底水驱油藏特点，在前人研究的基础上，建立了管道流动模型；结合流体的不同流动形态，推导得出了相应的大孔道孔喉直径及渗透率概算公式。在冀东油田高浅北区高104?鄄5区块的应用结果表明，该方法计算结果与井间示踪剂监测及油田开发动态资料均能较好地吻合，具有使用简便、结果可靠、成本低的特点。其对大孔道参数的定量识别，为大孔道封堵技术应用过程中堵剂的选择及用量的确定提供了科学依据。

For unconsolidated sandstone reservoir, the existence of high permeable channels is a main limiting factor to further improve oil recovery in the middle-late stage of waterflooding. According to the characteristics of the reservoirs with edge-bottom water, the pipe flow model was established  based on the former researches in this paper. Combined with the different flow pattern of fluid, the parameters such as diameter and permeability of high permeable channels were derived. The method was applied in Block Gao 104-5 in the north area of Gaoqian of Jidong Oilfield. The calculation results are in agreement with the data obtained from tracer monitoring technique and the development performance. The results show that this calculation method is simple, reliable and low cost. The approximate calculation method can identify high permeable channels quantitatively. It provides scientific evidences for type selection and quantity determination of the plugging agent in the application of high permeable channel plugging technology.

10.6056/dkyqt201302020