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Method and system used for determining well control dynamic reserves of shale gas well

A dynamic reserve and gas well control technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as difficult well pressure, unstable recovery, and low permeability of shale matrix

Active Publication Date: 2017-03-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0007] When this method is applied to calculate the dynamic reserves of shale gas wells, there are mainly the following problems: first, the influence of the desorption and diffusion of adsorbed gas in the shale matrix cannot be considered when calculating the dynamic reserves of gas wells; Pressure Recovery Instability Well Tests to Interpret Mean Formation Pressure
[0008] Based on the calculation methods of dynamic reserves of shale gas wells at home and abroad, there is currently a lack of effective and accurate calculation methods for dynamic reserves of shale gas wells

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  • Method and system used for determining well control dynamic reserves of shale gas well
  • Method and system used for determining well control dynamic reserves of shale gas well

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[0089] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0090] Such as figure 1 Shown is a method flow chart according to an embodiment of the present invention, the following reference figure 1 The present invention will be described in detail.

[0091] First, in step S110, the original formation pressure of the shale gas reservoir is obtained, and the bottom hole flowing pressure is calculated based on the gas well structure data and production data.

[0092]...

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Abstract

The invention discloses a method and a system used for determining well control dynamic reserves of a shale gas well. The method comprises the steps of obtaining an initial formation pressure of a shale gas reservoir, and calculating a well bottom flow pressure through structure data and production data of the gas well; establishing a first interpolation table based on a conversion relationship between a pressure and a pseudo-pressure to establish a corresponding relationship between the pressure p and the pseudo-pressure m(p); establishing a second interpolation table based on given basic parameters and Za(p) defined by a matter balance equation of the shale gas reservoir to establish a corresponding relationship between the pressure p and a ratio of the pressure p to Za(p); and based on the initial formation pressure, the well bottom flow pressure and the production data, determining the well control dynamic reserves of the shale gas well by adopting the first interpolation table, the second interpolation table and a productivity equation. According to the method and the system, a shut-in pressure is not needed to recover an evaluated average formation pressure in calculation; and a calculation result is suitable for various applications such as reasonable shale gas well production allocation, reasonable development technology policy making, development scheme optimization and the like.

Description

technical field [0001] The invention belongs to the technical field of shale gas exploration and development, and in particular relates to a method and system for determining well-controlled dynamic reserves of shale gas wells. Background technique [0002] The evaluation method of dynamic reserves of shale gas wells is quite different from that of conventional gas wells, mainly reflected in: (1) The geological characteristics and development techniques of gas reservoirs are different. Shale gas reservoirs are self-generated and self-storage gas reservoirs with extremely low permeability. Volume fracturing is needed to “artificially create reservoirs”. The production and recoverable reserves of gas wells are limited by fracturing, and the dynamic reserves of a single well are related to volume fracturing. . (2) The seepage characteristics are different. Due to the extremely low matrix permeability of shale gas reservoirs, it is difficult for gas reservoirs to enter the sta...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王卫红胡小虎刘华郭艳东杨小松
Owner CHINA PETROLEUM & CHEM CORP
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