Determination method of hot-water drive physical simulation similarity criterion of fracture thickened oil deposit

A heavy oil reservoir, similar standard technology, applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc., can solve the problems that have not been found in research reports

Active Publication Date: 2016-08-24
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

In the physical simulation research of hot water flooding in fractured heavy oil reservoirs, it is first necessary to establish a set of similarity criteria and obtain the similarity criterion to guide the physical model to meet the similarity with the actual reservoir, but no related research reports have been found before.

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  • Determination method of hot-water drive physical simulation similarity criterion of fracture thickened oil deposit
  • Determination method of hot-water drive physical simulation similarity criterion of fracture thickened oil deposit
  • Determination method of hot-water drive physical simulation similarity criterion of fracture thickened oil deposit

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with embodiments.

[0022] The invention provides a method for determining similar parameters of hot water flooding physical simulation in fractured heavy oil reservoirs, including the following steps:

[0023] 1) According to the characteristics of hot water flooding in fractured heavy oil reservoirs, the following five basic assumptions are established: ①Reservoir medium includes matrix and fractures, considering dual porosity and single permeability; ②fluid includes two phases of oil and water; ③reservoir In any of the micro-elements, thermal equilibrium and phase equilibrium are reached; ④Ignore the capillary force of the fracture, consider matrix imbibition, and consider gravity; ⑤Ignore the compressibility and thermal expansion of rocks and fluids, and ignore the thermal cracking of hydrocarbons.

[0024] 2) According to the material balance equation (1) in the fracture and the energy balance equation...

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Abstract

The invention relates to a determination method of hot-water drive physical simulation similarity criterion of fracture thickened oil deposit. The determination method includes steps of 1) establishing basic assumption conditions according to hot-water drive seepage of fracture thickened oil deposit; 2) establishing a hot-water drive mathematical model of fracture thickened oil deposit according to the material balance equation and the energy balance equation in fracture and pressure, initial temperature and internal and external boundary conditions; 3) non-dimensionalizing relevant variables in the hot-water drive mathematical model of fracture thickened oil deposit, and simplifying the non-dimensionalized mathematical model of fracture thickened oil deposit; 4) listing physical variables in the hot-water drive mathematical model and the hot-water drive non-dimensionalized mathematical model of fracture thickened oil deposit; 5) listing basic dimensions included in all physical variables of step 4); 6) acquiring similarity criterion combined with analysis of Pi theory and similarity theory according to the hot-water drive non-dimensionalized mathematical model of fracture thickened oil deposit.

Description

Technical field [0001] The invention relates to a method for determining the similarity criterion of a hot water flooding physical simulation of a fractured heavy oil reservoir. Background technique [0002] The development effect of cold water injection in fractured heavy oil reservoirs is poor, while hot water injection can reduce crude oil viscosity and improve water flooding effect. In the physical simulation study of hot water flooding in fractured heavy oil reservoirs, it is first necessary to establish a set of similarity criteria and obtain similarity criteria to guide the physical model to meet the similarity of the actual reservoir, but no relevant research reports have been found before. Summary of the invention [0003] In view of the above-mentioned problems, the purpose of the present invention is to provide a method for determining the similarity criterion of the physical simulation of hot water flooding in fractured heavy oil reservoirs. [0004] In order to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20E21B43/24
CPCE21B43/20E21B43/24
Inventor 丁祖鹏郑强李娜焦松杰李南王磊孙依依范虎谭先红田冀
Owner CHINA NAT OFFSHORE OIL CORP
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