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Bottom water reservoir horizontal well water flooding numerical simulation method based on quasi-streamline method

A bottom water reservoir and numerical simulation technology, which is applied in the field of oil reservoir engineering of petroleum exploration and development, can solve problems such as numerical dispersion in conventional numerical simulation, and achieve the effect of simple numerical simulation method and accurate calculation results.

Active Publication Date: 2019-06-07
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology

[0003] The purpose of the present invention is to provide a water flooding numerical simulation method for horizontal wells in bottom water reservoirs based on the pseudo streamline method. Diffusion problem

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  • Bottom water reservoir horizontal well water flooding numerical simulation method based on quasi-streamline method
  • Bottom water reservoir horizontal well water flooding numerical simulation method based on quasi-streamline method
  • Bottom water reservoir horizontal well water flooding numerical simulation method based on quasi-streamline method

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[0036] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

[0037] Such as figure 1 As shown, the present invention provides a water flooding numerical simulation method for horizontal wells in bottom water reservoirs based on the pseudo-streamline method, the method comprising:

[0038] Step 1. Collect basic static and dynamic information of the reservoir to provide parameters for numerical simulation calculations; Plane and vertical average permeability, average porosity of oil layers, average water saturation of oil layers, and oil, gas and water production data of oil wells.

[0039] Step 2, according to the original relative permeability data collected in step 1, perform normalization processing, divide the abscissa from 0 to 1 into n equal parts on the standa...

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Abstract

The invention provides a bottom water reservoir horizontal well water flooding numerical simulation method based on a quasi-streamline method, which comprises the following steps: step 1, collecting basic static and dynamic information of a reservoir, and providing parameters for numerical simulation calculation; step 2, calculating parameter tables such as Kro, Krw, fw, fw 'and PV under each water saturation according to the relative permeability experiment data; 3, determining quasi-streamline distribution according to the form of the bottom water ridge, and performing isovolumetric mesh generation along the streamline; 4, initializing a model, and setting initial saturation, a pressure boundary and the like of a grid according to the actual condition of an oil reservoir; step 5, calculating simulation parameters such as saturation field distribution, seepage resistance and the like according to a water drive leading edge displacement theory. Aiming at the understanding problem of the water displacement rule of the bottom water reservoir, a bottom water displacement theoretical model is established by adopting a quasi-streamline method, the development dynamics of a horizontal well of the bottom water reservoir are simulated, and theoretical and technical support is provided for making a bottom water reservoir development technical policy.

Description

technical field [0001] The invention relates to the oil reservoir engineering field of petroleum exploration and development, in particular to a numerical simulation calculation method for the water flooding process of horizontal well exploitation in bottom water reservoirs. Background technique [0002] During the production of horizontal wells in bottom water reservoirs, crude oil is mainly driven by the vertical bottom water to gather in the wellbore, and the displacement range is mainly in the vertical area of ​​the oil layer. The vertical distance between the bottom water and the oil layer is much smaller than the conventional injection-production well spacing. Bottom water reservoirs often show the characteristics of rapid water cut rise and large decline. The key to the development of horizontal wells in bottom water reservoirs is to determine the sweep radius of the bottom water ridge in the horizontal well and determine the saturation distribution in the swept area ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY02A10/40
Inventor 苏彦春侯亚伟李彦来黄凯罗宪波蔡晖张东赵秀娟牟松茹谭捷
Owner CHINA NAT OFFSHORE OIL CORP
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