Injection allocation rate determination method, device and system of stereoscopic well pattern of horizontal well
A technology for horizontal wells and injection, which is applied in wellbore/well components, measurement, and production of fluids, etc., and can solve problems such as oil production decline, oil layer plane, uneven vertical water absorption, and poor production well effectiveness.
Inactive Publication Date: 2020-02-21
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology
[0003] In the middle and late stages of oilfield development, some oil reservoirs are affected by factors such as crude oil viscosity, oil-water viscosity ratio, reservoir heterogeneity, and bottom water coning, resulting in uneven horizontal and vertical water absorption of oil layers, poor performance of production wells, and water content. Problems such as fast rising speed lead to a significant decline in oil production. In order to improve the overall development effect of this type of reservoir, horizontal well three-dimensional well pattern technology is usually used to solve the above problems.
[0004] The three-dimensional well pattern of horizontal wells refers to the unique well pattern form in which vertical wells and horizontal wells are deployed together in thicker reservoirs. Although the three-dimensional well pattern of horizontal wells has supplemented and improved the original An irregular well pattern is formed, which causes the problem of rational distribution of water injection
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[0046]In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification Obviously, the described embodiments are only some of the embodiments in the description, not all of them. Based on one or more embodiments in the description, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the embodiments of the description.
[0047] In the middle and late stages of tight oil field development, some oil reservoirs are affected by factors such as crude oil viscosity, oil-water viscosity ratio, reservoir heterogeneity, bottom water coning, etc., resulting in uneven horizontal and vertical water absorption of oil layers, and poor performance of producti...
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The embodiment of the application discloses an injection allocation rate determination method, device and system of a stereoscopic well pattern of a horizontal well. The method can comprise the stepsof transforming the stereoscopic well pattern of the horizontal well at a target work area onto a complex plane through a conformal transformation method for obtaining a complex plane model; buildingan injection-production pressure difference calculation model of a water injection well with a large injection rate and the axis midpoint of the horizontal section of the horizontal well according tothe complex potential of any point in the complex plane model; and determining the first injection allocation rate of the water injection well with the large injection rate and the second injection allocation rate of a water injection well with a small injection rate in the stereoscopic well pattern of the horizontal well according to the injection-production pressure difference calculation model.According to the embodiments of the application, the injection allocation rate of the stereoscopic well pattern of the horizontal well can be determined more accurately.
Description
technical field [0001] The invention relates to the technical field of petroleum data processing, in particular, to a method, device and system for determining the distribution amount of a three-dimensional well pattern of a horizontal well. Background technique [0002] Tight oil means that the air permeability is lower than 1.0×10 -3 μm 2 Or the covering pressure permeability is lower than 0.1×10 -3 μm 2 Oil resources in reservoirs such as sandstone, siltstone, dolomite and limestone enjoy the reputation of "black gold" in the oil industry. Tight oil and gas are widely distributed around the world. According to statistics, the amount of unconventional oil and gas resources in the world is about four times that of conventional oil and gas resources. From the proven geological reserves submitted between 2000 and 2010, it can be found that my country's unconventional oil and gas exploration has developed rapidly. The proven geological reserves of unconventional oil and ga...
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Login to View More IPC IPC(8): E21B43/20E21B47/06E21B43/30
CPCE21B43/20E21B43/30E21B47/06
Inventor 田冷闫子旺顾岱鸿王义鹏黄灿孟艳
Owner CHINA UNIV OF PETROLEUM (BEIJING)