Optimum Design Method of Well Pattern in Water Drive Reservoir

An optimized design, water-flooding technology, applied in earth-moving drilling, wellbore/well components, production fluids, etc. Well position and other problems, to achieve the effect of well position linkage optimization and efficiency improvement

Active Publication Date: 2018-02-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology

[0004] For a long time, the optimal design of well pattern has mainly relied on the experience of reservoir engineers. However, due to the strong heterogeneity of the reservoir and the large difference in physical properties, it is difficult to judge the type and location of the optimal well pattern by artificially selecting the well pattern. limitation
In recent years, researchers and engineers at home and abroad have proposed a well pattern and well location optimization design method that combines optimization theory and numerical simulation, but relying on numerical simulation to evaluate the effect of each scheme, resulting in a huge amount of calculation and time-consuming in the entire optimization process Very long, limited amount of calculation and time is often difficult to obtain satisfactory results

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  • Optimum Design Method of Well Pattern in Water Drive Reservoir
  • Optimum Design Method of Well Pattern in Water Drive Reservoir
  • Optimum Design Method of Well Pattern in Water Drive Reservoir

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Embodiment Construction

[0022] The well pattern optimization design method for water flooding reservoirs adopts two-level optimization design of well pattern and well location. The first-level well pattern design determines the reasonable well pattern density and pattern, and the second-level well location optimization determines the optimal well location deployment. , including the following steps:

[0023] Step 1. Collect and sort out geological development data of the reservoir, the geological development data of the reservoir include the permeability field k(x, y), the porosity field φ(x, y), the reservoir area F, Reservoir reserves N, oil phase viscosity μ o , water phase viscosity μ w , saturation field s w (x,y), relative permeability curve, displacement efficiency η o , oil price r o , Drilling cost C for each well;

[0024] Step 2, first-level well pattern design, determine the reasonable well pattern density and well pattern; the specific method is as follows:

[0025] Step 201: Calcu...

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Abstract

The invention belongs to the field of oil and gas field development, and in particular relates to a method for optimally designing a well pattern of a water flooding oil reservoir. The well pattern optimization design method for water flooding reservoirs adopts the two-level optimization design of well pattern and well location, including the following steps: Step 1, collecting and sorting out reservoir geological development data; Step 2, first-level well pattern design, determining a reasonable well pattern Density and well pattern; step 3, optimization of the second-level well location, optimization and fine-tuning of each well location. The invention can comprehensively consider the heterogeneity of reservoir physical properties, reservoir fluid heterogeneity, economic factors, etc., and adopts a two-stage design method of first-level well pattern design and second-level well position optimization to achieve well pattern density , Well layout mode, and well location linkage optimization; for large-scale oil reservoirs, the optimization efficiency can be greatly improved.

Description

technical field [0001] The invention belongs to the field of oil and gas field development, and in particular relates to a method for optimizing the well pattern design of a water flooding oil reservoir, which is used for improving the recovery rate of the oil reservoir. Background technique [0002] The design of water injection well pattern is one of the most critical tasks in the formulation of reservoir water injection development plan. Well pattern design needs to fully consider reservoir physical properties and development conditions to maximize development benefits. However, due to the large number of parameters affecting the optimal well pattern and the complex relationship between parameters, it is very difficult to determine the optimal well pattern. [0003] Through retrieval, the invention patent with application number 201310302819.9 (authorized announcement number is CN103422849A) discloses a method and device for rebuilding well patterns in old oil fields for...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/30
CPCE21B43/30
Inventor 冯其红王相张先敏邢祥东陈红伟
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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