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A Numerical Simulation Method of Water Drive in Horizontal Wells in Bottom Water Reservoir Based on Pseudostreamline 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: 2022-06-07
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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  • A Numerical Simulation Method of Water Drive in Horizontal Wells in Bottom Water Reservoir Based on Pseudostreamline Method
  • A Numerical Simulation Method of Water Drive in Horizontal Wells in Bottom Water Reservoir Based on Pseudostreamline Method
  • A Numerical Simulation Method of Water Drive in Horizontal Wells in Bottom Water Reservoir Based on Pseudostreamline 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 with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.

[0037] like figure 1 As shown, the present invention provides a numerical simulation method for water flooding of 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 calculation; Plane and vertical average permeability, oil layer average porosity, oil layer average water saturation, oil well oil, gas and water production data.

[0039] Step 2: According to the original phase permeability data collected in step 1, perform normalization processing. On the normalized phase permeability curve, divide the abscissa from 0 to 1 int...

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Abstract

The present invention provides a water drive numerical simulation method for horizontal wells in bottom water reservoirs based on the pseudo-streamline method. The method comprises: step 1, collecting basic static and dynamic information of the reservoir, and providing parameters for numerical simulation calculation; step 2, according to Based on the experimental data of relative permeability, calculate Kro, Krw, fw, fw', PV and other parameter tables at various water saturations; step 3, determine the distribution of pseudo streamlines according to the shape of bottom water ridges, and conduct equal volume grids along the streamlines Subdivision; step 4, model initialization, set the initial grid saturation, pressure boundary, etc. according to the actual situation of the reservoir; step 5, calculate the saturation field distribution, seepage resistance and other simulation parameters according to the water flooding front displacement theory ; This invention aims at the problem of understanding the law of water flooding in bottom water reservoirs, uses the pseudo-streamline method to establish a theoretical model of bottom water flooding, and simulates the development dynamics of horizontal wells in bottom water reservoirs. Formulated to provide theoretical and technical support.

Description

technical field [0001] The invention relates to the field of oil reservoir engineering of petroleum exploration and development, in particular to a numerical simulation calculation method for the water-displacing oil extraction process of horizontal wells in bottom water reservoirs. Background technique [0002] During the production of horizontal wells in bottom water reservoirs, the crude oil is mainly driven by vertical bottom water to converge to the wellbore. 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 water cut. The key to the development of horizontal wells in bottom water reservoirs is to determine the swept radius of the bottom water ridge in the horizontal well and the saturation distribution of the swept area to...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
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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