Method for predicting water cone drop height of bottom water reservoir straight well

A prediction method and high-level technology, which can be used in surveying, earth-moving drilling, wellbore/well components, etc., can solve problems such as blindness and unscientificity, and achieve the effect of reasonable determination, simple and scientific application, and improved economic benefits.

Active Publication Date: 2018-05-04
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

However, there is currently a lack of a simple and effective method for determining the height of the water cone drop,

Method used

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  • Method for predicting water cone drop height of bottom water reservoir straight well
  • Method for predicting water cone drop height of bottom water reservoir straight well
  • Method for predicting water cone drop height of bottom water reservoir straight well

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Embodiment Construction

[0039] In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments are listed below and shown in the accompanying drawings in detail as follows.

[0040] Such as figure 1 as shown, figure 1 It is a flow chart of the method for predicting the height of water cone fall in vertical wells in bottom water reservoirs of the present invention.

[0041] Step 101: Using ECLIPSE reservoir numerical simulation software, establish a conceptual model for vertical well numerical simulation of bottom water reservoirs.

[0042] The model adopts a uniform grid system of 50×25×23. Fetchovich analyzes the water body. The grid size is 8m×8m×1m. Vertically, layers 1-20 are oil layers, and layers 21-23 are water layers. Other parameters of the basic model are as follows: the water-oil volume ratio is 20, the reservoir thickness is 20m, the porosity is 32.3%, and the plane permeability is 1.0μm 2 , the vertical perm...

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Abstract

The invention provides a method for predicting the water cone drop height of a bottom water reservoir straight well. The method comprises the steps that 1, by utilizing reservoir numerical simulationsoftware, a numerical simulation conceptual model of the bottom water reservoir straight well is established; 2, by utilizing the established numerical simulation conceptual model of the bottom waterreservoir straight well, the quantitative relationship between the water cone drop height and the well shutdown time under all single influence factors is calculated; 3, by utilizing the calculated relationship between the water cone drop height and the well shutdown time under all the single influence factors, a prediction model of the water cone drop height of the bottom water reservoir straightwell under the multiple influence factors is established through multi-element nonlinear regression; and 4, by utilizing the established prediction model of the water cone drop height of the bottom water reservoir straight well, the water cone drop height is calculated. According to the method for predicting the water cone drop height of the bottom water reservoir straight well, the water cone drop height of the bottom water reservoir straight well after high-water-cut well shutdown is determined, so that the well re-opening opportunity of the oil well after anti-coning is reasonably determined, and the economic benefits of well re-opening production are increased.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a method for predicting the fall height of water cones in vertical wells in bottom water reservoirs. Background technique [0002] The biggest problem facing the development of bottom water reservoirs is the phenomenon of bottom water coning. Bottom water coning will lead to premature water intake of oil wells, a sharp drop in oil production and a rapid rise in water cut, which will increase water treatment costs and increase development costs. Well shut-in and coning reduction is an effective method for overcoming bottom water coning after high water cut in bottom water reservoirs. After coning, oil wells are re-opened to reduce water cut, increase oil production, and improve development economic benefits. Accurately grasping the drop height of the water cone after shutting in the well is the key to determining the timing of restarting the well and improving the pro...

Claims

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Application Information

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IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 孙业恒吴光焕赵燕王传飞韦涛邓宏伟李伟杨艳霞闵令元李伟忠王一平魏超平李洪毅王可君于建梅
Owner CHINA PETROLEUM & CHEM CORP
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