Method for calculating inter-well interference degree of tight gas well
A technology of inter-well interference and calculation method, which is applied in the directions of calculation, computer-aided design, design optimization/simulation, etc., and can solve the problems of a large number of development wells in tight gas reservoirs, inability to directly apply and low production per well, etc.
Pending Publication Date: 2022-06-03
SHAANXI YANCHANG PETROLEUM GRP
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Problems solved by technology
[0003] Tight gas reservoirs have a large number of development wells and low single well production. Well pattern intensification is the main means to improve the recovery of tight gas reservoirs. Rapid evaluation of interwell interference is more important for tight gas wells. Since the development mechanism of tight gas wells is different from the above gas wells, As a result, current methods cannot be directly applied
Method used
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[0019] Specific experimental example
[0020] Table 1 Calculation parameter table
[0021] Step 1: Calculate the control radius r e .
[0022] (1) Assume the initial value of the control radius r e (0) is [10,1000];
[0023] (2) Determine the initial value r of the control radius iteration e begin (k)
[0024] (3) Calculate the average formation pressure
[0025] (4) Calculate the final value r of the control radius iteration e end (k)
[0026] (5) Determine whether the final value of the control radius iteration is valid
[0027] Increase the value of the number of iterations k, and continue to iterate. For details of the iteration process, see figure 1 , and finally get:
[0028] Step 2: Calculate the well spacing L αβ
[0029] Step 3: Calculate the degree of interference between wells
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The invention relates to the technical field of oil-gas field development, in particular to a tight gas well inter-well interference degree calculation method, which comprises the following steps of: aiming at two tight gas wells positioned in the same production layer, respectively obtaining control radiuses of the two tight gas wells and a well spacing of the two tight gas wells, and substituting the control radiuses and the well spacing into a formula to calculate the inter-well interference degree of the two tight gas wells, when the inter-well interference degree is equal to 0, the inter-well interference does not exist between the two tight gas wells; and when the inter-well interference degree is greater than 0, indicating that inter-well interference exists between the two tight gas wells. The method for calculating the inter-well interference degree of the tight gas well is established from the productivity equation, the seepage equation, the material balance equation and the well spacing, and the method is of great significance to residual gas distribution evaluation and well pattern optimization.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a method for calculating the interference degree between tight gas wells. Background technique [0002] Two oil and gas wells that are not far apart in the same production layer are producing at the same time. Influenced by the physical properties, fluid characteristics and working system of the reservoir, there will be different levels of inter-well interference between the two wells. The phenomenon of inter-well interference generally exists in the development of oil and gas reservoirs. In the process, evaluating the degree of inter-well interference is the basis for working system adjustment and well pattern optimization. At present, the research on inter-well interference mainly focuses on coalbed methane wells, shale gas wells and oil wells. The research methods mainly include interference well testing method, physical simulation, numerical simulation, ...
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Patent Timeline
Login to View More IPC IPC(8): G06F30/28G06F113/08G06F119/08G06F119/14
CPCG06F30/28G06F2119/14G06F2119/08G06F2113/08
Inventor 朱晴张磊李涛辛翠平宋珈萱邢云谢小飞王佳琪
Owner SHAANXI YANCHANG PETROLEUM GRP
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