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《Fault-Block Oil & Gas Field》 2011-03
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Discussion on productivity model of horizontal wells in Bingham type heavy oil reservoir

Liang Tao1,Li Gang2,Xu Lu2,Wang Ping1(1.Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;2.Heavy Oil Development Company,Xinjiang Oilfield Company,PetroChina,Karamay 834000,China)  
Owing to the inner gel texture of reservoir,the rheology property of heavy oil is generally complex and is a kind of typical non-Newton fluid,that is Bingham type fluid.When calculating the productivity of horizontal well in heavy oil reservoir,the special rheology characteristics of heavy oil are always neglected.Therefore,during the process of calculation,there is no concern about the threshold pressure caused by Bingham type rheology property,the results are bigger than that of actual situation and there is a certain gap with the field application.Based on the research of the rheology characteristics of heavy oil and through using the ellipsoidal drainage model,the calculation models of Bingham type fluid for productivity of horizontal well are deduced and the determining methods of threshold pressure are given using Newton-Cotes formulas.Taking a real reservoir as an example,the results between this model and other models are calculated and compared.The results show that productivity calculation result of the model in this paper is smaller than that of other models,which is accordant with the actual oilfield production.
【Fund】: 国家科技重大专项子课题“大型油气田及煤层气开发”(2008ZX05028-003)
【CateGory Index】: TE328
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