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Visual representation and evaluation method of seepage field in water drive reservoir based on flow field diagnosis

A technology of seepage field and flow field, which is applied in the field of visual representation and evaluation of seepage field in water drive reservoirs based on flow field diagnosis, can solve the problems of low accuracy and poor convergence, achieve high accuracy and improve the degree of water drive Effect

Active Publication Date: 2022-04-22
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a visual representation and evaluation method of seepage field in water drive reservoirs based on flow field diagnosis, which solves the problems of low accuracy and poor convergence under complex geological conditions in existing seepage field evaluation methods

Method used

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  • Visual representation and evaluation method of seepage field in water drive reservoir based on flow field diagnosis
  • Visual representation and evaluation method of seepage field in water drive reservoir based on flow field diagnosis
  • Visual representation and evaluation method of seepage field in water drive reservoir based on flow field diagnosis

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Embodiment 1

[0094] In a preferred embodiment of the present invention, taking the fault block reservoir in X area of ​​M Oilfield as an example, a visual representation and evaluation method of seepage field in water flooding reservoir based on flow field diagnosis is provided, such as figure 1 shown, including the following steps:

[0095] Step 1: Establish the geological model of the target reservoir, and calculate the flow exchange between grids of the geological model of the target reservoir;

[0096] Step 1.1: Collect historical production data and historical water injection data of the target reservoir, and establish a geological model of the target reservoir in combination with the geological information of the target reservoir;

[0097] Under the condition of known reservoir fluid distribution, the most simplified model of the target reservoir is obtained by solving the material conservation equation based on Darcy's law. The material conservation equation is:

[0098]

[0099...

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Abstract

The invention discloses a visual representation and evaluation method of seepage field of water flooding oil reservoir based on flow field diagnosis, belongs to the field of oil field water injection development and adjustment, establishes a geological model of a target oil reservoir, and calculates the flow exchange amount between grids of the geological model of the target oil reservoir; Calculate the propagation time distribution of the seepage field according to the amount of flow exchange between the grids, and calculate the numerical tracer. According to the distribution of the numerical tracer, the affected areas of different injection wells and the control areas of production wells are divided; The grid nodes are sorted, and a flow capacity-reservoir capacity diagnostic map is made to evaluate the flow heterogeneity in different regions; the evaluation is based on the three indicators of flow heterogeneity, average oil saturation and pore volume in different regions. The development potential of different regions. The invention solves the problems of low accuracy and poor convergence under complex geological conditions in the existing seepage field evaluation method.

Description

technical field [0001] The invention belongs to the field of oil field water injection development and adjustment, and relates to a visual representation and evaluation method of seepage field of water drive oil reservoir based on flow field diagnosis. Background technique [0002] Waterflood development, as the main means of enhancing oil recovery, has a wide range of applications. However, after long-term water flooding development in most oil reservoirs, the distribution of remaining oil is messy and scattered, and it is difficult to effectively understand the producing law of water flooding reservoirs, which makes it difficult to adjust the seepage field and affects the efficiency of water flooding development. [0003] Domestic scholars evaluate the seepage field by determining the influencing parameters of the seepage field to provide support for the decision-making of the seepage field adjustment. However, the method needs to rely on expert experience for evaluation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00G06F30/20E21B47/11
CPCE21B49/00E21B47/11G06F30/20
Inventor 贾虎邓力珲张瑞蒲万芬卞小强
Owner SOUTHWEST PETROLEUM UNIV
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