A Study On Numerical Simulation Of Profile Technology In Bei 301 Block

For the characteristics of Bei 301 block, such as strata non-homogeneous seriousness, large degree of oil and water fluidity's differences, difficult to solve the separated layer water flooding, relative large well spacing of oil wells and water wells, large single-well flooding strength, this paper researches and analyzes the water drive situation and the reasons of water breakthrough and summarizes the successes and failures how measures stabilize the output. Based on the above all, this paper puts forward the targeted technological countermeasure by which the quantities of output are fixed, that is profile modification technology.Applying the knowledge on fuzzy math and being in accordance with the static and dynamic information, this paper identifies the principles in accordance with which oil wells and layers are selected in chemical profile modification. That is, water well whose well comprehensive decision-making factor is greater than its average value, is defined as profile modification well. Based on the decision-making, this paper makes use of the fuzzy evaluation and establishes the principle how to select the layers, that is, the layer whose layer comprehensive decision-making factor is greater than its average value, is defined as profile modification layer. On the basis, this paper designs the construction program of profile modification for battery of downflow wells. Concrete program is that methods of profile modification is shallow profile modification, radius of profile modification is between 3-4 meters and when displacement is set at 4.53m3/h,the range of calculated pressure is between 7.21MPa~8.54MPa.And, this paper evaluates the results of profile modification. Above all make the spot application more scientific.Through establishing three-dimensional geological model and combining numerical simulation software, this paper fits the actual data of production and finally determines the distribution of remaining oil. Numerical simulation methods used to determine that when sealing efficiency is the percent 80-90, entry profile is improved and when radius of profile modification is about 3 meters, effectiveness of profile modification is maximized. In the basis of fitting the historical data of water flooding, this paper forecasts that final recovery ratio of water flooding is the percent 30.5. Fitting the profile modification of battery of better wells shows that after implementing the profile modification, average crude oil production volume of single well is increased by 200t-684t and water content is decreased by 4%~6%.