A method and system for rapid analysis of remaining oil in fractured-vuggy reservoirs

A rapid analysis, gap-hole technology, applied in design optimization/simulation, special data processing applications, CAD numerical modeling, etc., can solve problems such as ill-conditioned linear equations, determination of constraints, prediction of solutions, and long time consumption, etc., to achieve Effects of reduced calculation time and quick analysis

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] Using existing technology to analyze and study fractured-vuggy reservoirs, the linear equations in numerical simulation analysis are extremely ill-conditioned, which affects its convergence speed, resulting in low efficiency and long time-consuming analysis of the entire analysis, which seriously restricts fractured-vuggy reservoirs Determination of remaining oil and forecast of plan

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  • A method and system for rapid analysis of remaining oil in fractured-vuggy reservoirs
  • A method and system for rapid analysis of remaining oil in fractured-vuggy reservoirs
  • A method and system for rapid analysis of remaining oil in fractured-vuggy reservoirs

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Embodiment Construction

[0070] 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 implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0071] Reservoir numerical simulation analysis is one of the key technologies of oilfield development, and it is an important tool for studying the distribution of remaining oil and formulating development plans.

[0072] The reservoir space of carbonate fracture-cavity reservoirs is a collection of various void types such as (large dissolved caves, large fractures), dissolved pore zones, fractu...

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Abstract

The invention discloses a method and system for quickly analyzing remaining oil in a fracture-cavity reservoir, which includes establishing a mathematical model of the fracture-cavity reservoir; dividing the grid units of the fracture-cavity reservoir based on the mathematical model Establish a numerical model; iteratively solve the numerical model, and analyze the remaining oil of the fractured-vuggy reservoir according to the distribution of fluid pressure and saturation used to describe the fractured-vuggy reservoir; where, iteratively solving the numerical model In each iterative step at the time, it includes: extracting the oil phase pressure equation from the numerical model based on the characteristics of the grid cells; processing the oil phase pressure equation based on the algebraic multigrid algorithm to obtain the first pressure value; The first pressure value is used as an initial solution when iterating the numerical model. With this method, the remaining oil in the fracture-vuggy reservoir can be quickly and effectively analyzed.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, in particular to a method and system for quickly analyzing remaining oil in fracture-cavity reservoirs. Background technique [0002] Reservoir numerical simulation analysis is one of the key technologies of oilfield development, and it is an important tool for studying the distribution of remaining oil and formulating development plans. The current technology can show the advantage of faster convergence speed for homogeneous reservoirs. However, the reservoir space of fractured-vuggy carbonate rock reservoirs is composed of (large dissolved caves, large fractures), dissolved pore zones, fractured zones, (small dissolved pores, micro fractures) and other types of voids. It is complex and has the characteristics of uneven permeability and strong heterogeneity. [0003] Using existing technology to analyze and study fractured-vuggy reservoirs, the linear equations in numerical simulat...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F111/10
CPCG06F30/20G06F2111/10
Inventor 康志江张允张冬丽赵艳艳芮洪兴
Owner CHINA PETROLEUM & CHEM CORP
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