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Oil deposit, crack and shaft fully-coupled simulating method of fractured horizontal well

A simulation method and fully coupled technology, applied in wellbore/well components, earthmoving, production of fluids, etc., can solve the problem of inability to achieve simultaneous calculation of pressure and saturation, failure to achieve true coupling between oil reservoirs, fractures and wellbore, and difficulties. Achieving issues such as reservoir, fracture, and wellbore coupling

Active Publication Date: 2015-04-22
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology

It can be seen that from the perspective of the processing and solving process of the numerical model, the existing models have not realized the real coupling between reservoirs, fractures and wellbores, and cannot realize the calculation of parameters such as pressure and saturation in reservoirs, fractures and wellbores. Simultaneous computing
[0006] Therefore, the existing fracturing horizontal well reservoir, fracture, and wellbore fully coupled simulation methods all solve the parameters of fractures, reservoirs, and wellbore separately, rather than simultaneously. Therefore, it is difficult to realize the Due to the coupling between them, the obtained simulation results are difficult to match the actual situation of fractured horizontal wells

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  • Oil deposit, crack and shaft fully-coupled simulating method of fractured horizontal well
  • Oil deposit, crack and shaft fully-coupled simulating method of fractured horizontal well
  • Oil deposit, crack and shaft fully-coupled simulating method of fractured horizontal well

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[0098]In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.

[0099] The specific embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0100] The fully coupled simulation method for fracturing horizontal well reservoirs, fractures, and wellbores in the embodiment of the present invention needs to establish a coupling model among the fractures, reservoirs, and wellbores in advance, and then perform fracturing water according to the model after the coupling model is established. Numerical simulation of flat well productivity prediction. The coupling model of the embodiment of the pres...

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Abstract

The invention provides an oil deposit, crack and shaft fully-coupled simulating method of a fractured horizontal well. The method comprises the steps of acquiring input parameters for productivity predication number simulation; inputting the input parameters to a pre-built coupling module which coupling a crack, an oil deposit and a shaft; performing fully implicit scheme for the coupling model to solve to obtain the productivity predication number simulation result of the fractured horizontal well. According to the method, the pre-built complete coupling module which coupling the crack, the oil deposit and the shaft is treated as the basis, and the fully implicit scheme is performed for the coupling mode in which the input parameters are input by the N-R iteration method, so as to synchronously solve the oil deposit, crack and shaft parameters; the coupling relationship of the crack, the oil deposit and the shaft is considered, the flow rate between the oil deposit and the crack and the flow rate between the crack and the shaft are taken into account, besides the oil deposit and the crack, so that the obtained well productivity predication number simulation result is highly matched with the actual condition of the fractured horizontal well.

Description

technical field [0001] The invention relates to the technical field of geological exploration numerical simulation, in particular to a fully coupled simulation method for fracturing horizontal well reservoirs, fractures and well bores. Background technique [0002] Since the 1990s, horizontal well technology has been widely used in the development of oil and gas fields. Horizontal wells increase the contact area between wells and reservoirs, increase oil and gas production and ultimate recovery, and the development of horizontal well technology has solved some problems that vertical wells cannot effectively solve. However, for low-permeability reservoirs, single-well productivity is still very low simply by relying on horizontal well development, which is determined by the characteristics of low-permeability reservoirs. Due to low permeability, large seepage resistance, and poor connectivity, horizontal wells are required To further increase production and ultimate recovery...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/26
Inventor 安永生吴晓东韩国庆
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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