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Prediction Method of Water Cone Falling Height of Vertical Well in Bottom Water Reservoir

A prediction method and high-level technology, applied in the directions of surveying, earthwork drilling and production, wellbore/well components, etc., can solve problems such as unscientific and blindness

Active Publication Date: 2021-08-20
CHINA PETROLEUM & CHEM CORP +1
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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, which leads to the blindness and unscientificity of the production operation of the oil well after the cone is crushed.

Method used

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  • Prediction Method of Water Cone Falling Height of Vertical Well in Bottom Water Reservoir
  • Prediction Method of Water Cone Falling Height of Vertical Well in Bottom Water Reservoir
  • Prediction Method of Water Cone Falling Height of Vertical Well in Bottom Water Reservoir

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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 fall height of vertical well water cones in bottom water reservoirs, comprising: Step 1, using reservoir numerical simulation software to establish a conceptual model for numerical simulation of bottom water reservoir vertical wells; Step 2, using the established bottom water reservoir The numerical simulation conceptual model of Tibetan vertical wells calculates the quantitative relationship between the height of the water cone drop and the shut-in time under each single influencing factor; step 3, using the calculated relationship between the height of the water cone falling under each single influencing factor and the well shut-in time, establishes through multiple nonlinear regression Prediction model of vertical well water cone height in bottom water reservoir under multi-influencing factors; step 4, use the established prediction model of vertical well water cone height in bottom water reservoir to calculate water cone height. The method for predicting the height of water cone drop in vertical wells in bottom water reservoirs realizes the determination of the height of water cone fall in vertical wells with high water cut in bottom water reservoirs, so as to reasonably determine the timing of re-opening of oil wells after coning, and improve the production efficiency of re-opening wells economic benefits.

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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Patent Type & Authority Patents(China)
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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