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《Acta Petrolei Sinica》 2002-01
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THE METHOD OF RESERVOIR NUMERICAL SIMULATION WHEN CONSIDERING THE PRESSURE-DROP ALONE THE HORIZONTAL WELL-BORE

CHENG Lin-song,LAN Jun-cheng(University of Petroleum,Beijing 102200,China)  
The application of horizontal well technology has become wider in the developing of oil field.However there is a problem in the current methods of horizontal well numerical simulation:most of them do not consider the fluid pressure drop alone the horizontal well bore.So,it makes a relatively great deviation between the actual result of developing process and the result of numerical simulation.To solve this problem,we set up a new kind of horizontal well numerical simulation model in this paper,which based on the vertical well black oil simulation model.It considers the influences of 4 kinds of pressure losses when the fluid flows in the horizontal well bore (including well friction loss,acceleration pressure loss,mixture pressure loss and weight loss).The numerical simulation program based on the model can also deal with the anisotropic formation.Because the relevant matrix is a "seven diagonal sparse matrix with an attached column" when we consider the pressure drop alone the horizontal well bore,we develop a new mathematical method,which is called "partitioned matrix multiplication combined with preliminary treatment of conjugate gradient".The trial solution of this method has indicated a faster convergence rate.By the numerical simulation program,we correlate,compute and analyze the factors that influence the horizontal well production,pressure loss alone the well bore and flowing bottomhleo pressure.According to the results,we can give suggestions to the optimum design of the horizontal well.
【Fund】: 中国石油天然气集团公司“99滚动”项目 (990 50 7- 0 2 )
【CateGory Index】: TE319
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