Visualized pore-level planar model making method

A plane and model technology, which is applied in the field of visualization of pore-level plane models, can solve the problems of inability to perform image analysis, inability to judge, and invisibility of the displacement process.

Inactive Publication Date: 2007-07-11
PETROCHINA CO LTD
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Problems solved by technology

It has the characteristics of relatively low production cost and wide application. However, the displacement process is invisible, and image analysis cannot be performed, and it is impossible to quickly and intuitively make accurate judgments on the problems in the experimental process and experimental data; ② Sand inclusion transparent model Although it has a certain degree of visibility, it is only used for qualitative analysis of macroscopic phenomena; ③The microcosmic imitation township transparent pore model is made by engraving the pore network copied from the core casting thin section on the glass surface by photolithography technology. However, without the unique cements on natural cores and the surface of real sandstone grains, it is impossible to judge the influence of these minerals and cements on the injected fluid, which is the biggest problem in this field

Method used

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Examples

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Embodiment Construction

[0013] In order to further understand the content, characteristics and effects of the present invention, the following examples are given, and the details are as follows:

[0014] 1) Core selection

[0015] For natural oil reservoir cores obtained by drilling and coring, the air permeability is selected to be greater than 0.3 μm 2 The size of a single core (length×width×thickness) is 30×20×10mm. In the case of similar homogeneity, try to select the part with relatively uniform particles as the real sandstone for making the model.

[0016] 2) Core pretreatment

[0017] For the selected core, natural core, the crude oil in the core must be cleaned first, and the cleaned core is treated the same as the artificial core. Put turpentine and rosin in a container, fully dissolve the rosin, and soak the core in the solution , heated until the core is fully saturated with the rosin solution, left to cool down, cut into a volume of (length × width × thickness) 25 × 20 × 5mm, mm core bl...

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Abstract

The invention relates to the visual gap level plane module oil field exploration using man made authentic acidite micro module, choosing air penetration rate bigger than 0.2-0.3 mum natural or artificial acidite core, using fluid abietyl to fill the acidite core, sticking epoxide resin on the clean flat glass, grinding the core into the particle with diameter one third of the acidite granite, using the other of the same size to the core, connecting fluid injection and extraction at both ends of the core. The made module can vividly express the penetration rate of the oil reserve rock, suitable for oil and water alternating substitution, representing the actual flow of fluids of the underground fluids, with visuality for dynamic saturation quantitative analysis.

Description

technical field [0001] The present invention relates to a method for making an indoor micromodel experiment article for oil-water migration and seepage in an oil field, in particular to a method for making a visualized pore-level plane model of an artificial real sandstone micromodel for secondary oil recovery and tertiary oil recovery . Background technique [0002] At present, the models used to study the effect of water flooding and evaluate various chemical agents in the process of oil and gas field development mainly include: ① cylindrical natural cores and artificial rectangular cores taken from well drilling and coring, the displacement process of this model is invisible Yes, it is the one that is used more. It has the characteristics of relatively low production cost and wide application. However, the displacement process is invisible, and image analysis cannot be performed, and it is impossible to quickly and intuitively make accurate judgments on the problems in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00E21B47/10G01N15/08G01N13/04E21B47/002
Inventor 冯庆贤马同海滕克孟李辉梁建春
Owner PETROCHINA CO LTD
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