Water-drive pool seepage field visual representation and evaluation method based on flow field diagnosis

An evaluation method and technology of seepage field, which can be used in earth drilling, special data processing applications, instruments, etc., and can solve problems such as poor convergence and low accuracy

Active Publication Date: 2019-09-20
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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  • Water-drive pool seepage field visual representation and evaluation method based on flow field diagnosis
  • Water-drive pool seepage field visual representation and evaluation method based on flow field diagnosis
  • Water-drive pool seepage field visual representation and evaluation method 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 water-drive pool seepage field visual representation and evaluation method based on flow field diagnosis, and belongs to the field of oilfield flooding development adjustments. A target reservoir geological model is established, and flow exchange capacity among grids of the target reservoir geological model is calculated; according to the flow exchange capacity among the grids, seepage field propagation time distribution is calculated, numerical value tracer materials are calculated, and according to numerical value tracer material distribution, different injection well affected areas and production well control areas are divided; according to the propagation time size, grid joints in different areas are sorted, and a flow capacity-accumulation capacity diagnosis graph is made to evaluate flow heterogeneity in different areas; and according to three evaluation indicators of the flow heterogeneity, average oil saturation and pore volumes in different areas, development potential in different areas is evaluated. According to the water-drive pool seepage field visual representation and evaluation method based on the flow field diagnosis, the problems of low accuracy and poor convergence under complex geological conditions in an existing seepage field evaluation method are solved.

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 Applications(China)
IPC IPC(8): E21B49/00G06F17/50E21B47/11
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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