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《Complex Hydrocarbon Reservoirs》 2011-03
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Productivity sensitivity analysis and completion parameters design of perforated horizontal well

Jiang Lifu1,Chen Dechun1,Pang Wei2,Li Changheng1,Wang Bing1,Tong Hu3(1.Petroleum Engineering Institute of China University of Petroleum(East China),Dongying,Shandong 257061;2.Research Institute of Petroleum Engineering,SINOPEC,Beijing 100101;3.Research Institute of Petroleum Engineering of Henan Oilfield Company,SINOPEC,Nanyang,Henan 473132)  
Aiming at the large error in the productivity prediction and the incomplete consideration in the completion parameters design of perforated horizontal wells,a coupled model of oil-gas-water phases for perforated horizontal well,which includes reservoir flow,well-wall inflow and well-bore flow,was established.Computational analysis was carried out on the basis of the relevant data of Nan79-Ping2 well area in Henan Oilfield.The conclusions are drawn as follows:(1) reservoir parameters like oil viscosity and completion parameters like perforation density both have great influence on the productivity of perforated horizontal well and the regressive productivity equation based on the parametric sensitivity analysis has high accuracy with the average relative error of lower than 4.53%;(2) the productivity can be highly increased about one times through the optimization design of completion parameters;(3) In order to postpone the water breakthrough time,the variable density perforating,considering well-bore pressure drop,oil layer thickness,reservoir permeability,water saturation and the location of bottom/edge water boundary,can make a same inflow into each part of the horizontal section to reach a uniform inflow profile.The achievement can provide directive meanings to the productivity predication and the completion parameters design of horizontal wells in oilfield.
【Fund】: 中国石化河南油田分公司“稀油水平井油藏渗流及井筒变质量流耦合与产能预测研究”(10370502000288)
【CateGory Index】: TE257.1
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