A micro-reservoir model and its production method and application method

A technology of oil reservoir model and production method, which is applied in the fields of earthwork drilling, wellbore/well components, etc., can solve problems such as inability to realize reservoir simulation, and achieve the effect of shortening the time of research and experiment

Inactive Publication Date: 2021-09-24
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing micro-reservoir chip cannot realize the simulation of the imbibition process of the reservoir because it only simply simulates the two-dimensional channel of the real reservoir

Method used

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  • A micro-reservoir model and its production method and application method
  • A micro-reservoir model and its production method and application method
  • A micro-reservoir model and its production method and application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] figure 1 It is a structural schematic diagram of a microscopic reservoir model provided by Embodiment 1 of the present invention, figure 2 yes figure 1 An enlarged schematic diagram of the skeleton of the model, refer to figure 1 and figure 2 , the reservoir model includes a model framework 11, a wetting phase channel 12 and a non-wetting phase channel 13, the model framework contains pore throat channels 111, the wetting phase channel 12 provides a flow channel for the wetting phase, and the non-wetting phase channel 13 provides flow channels for the non-wetting phase, the wetting phase channel 12 and the non-wetting phase channel 13 communicate with the pore throat channel 111 respectively, and the wetting phase channel 12 and the non-wetting phase channel 13 are respectively located at the two ends of the pore throat channel. side, wherein the diameters of the wetting phase channel 12 and the non-wetting phase channel 13 are larger than the minimum diameter of t...

Embodiment 2

[0043] Figure 5 It is a flow chart of a method for making a microscopic reservoir model provided in Embodiment 2 of the present invention. The method is used to make a microscopic reservoir model as described in any one of Embodiment 1. Refer to Figure 5 , the method specifically includes:

[0044] S100, using the first mask to etch the model substrate for the first time to form pore throat channels on the model substrate.

[0045] S120, use the second mask to etch the model substrate for the second time, and form a wetting phase channel and a non-wetting phase channel on the model substrate, wherein the wetting phase channel and the non-wetting phase channel are respectively connected with the holes The throat channel is connected, the wetting phase channel and the non-wetting phase channel are located on both sides of the pore throat channel respectively, and the diameters of the wetting phase channel and the non-wetting phase channel are larger than the smallest diameter...

Embodiment 3

[0073] Figure 12 It is a flowchart of a method for using a microscopic reservoir model provided by Embodiment 3 of the present invention. refer to Figure 12 , the method of use is based on the reservoir model described in any one of embodiment one, specifically comprising:

[0074] S200, cleaning the microscopic reservoir model with hydrochloric acid solution, sodium hydroxide solution and deionized water, and drying the microscopic reservoir model.

[0075] When using the microscopic reservoir model provided in Example 1 to carry out imbibition experiments, the reservoir model needs to be cleaned first to remove residual inorganic and organic impurities in the reservoir model and residual liquid in the preparation process, etc., and Keep the reservoir model dry when in use.

[0076] Specifically, the cleaning step may specifically be: inject 10% hydrochloric acid solution into the microscopic reservoir model at a speed of 1ml / min for 1h, inject 5% NaOH solution into the ...

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Abstract

The invention discloses a microcosmic oil reservoir model, a manufacturing method and a using method thereof. The micro-reservoir model includes: a model skeleton, which includes pore-throat channels; the wetting phase channel is used to provide a flow channel for the wetting phase; the non-wetting phase channel is used to provide a flow channel for the non-wetting phase; among them, The wetting phase channel and the non-wetting phase channel are respectively connected with the pore throat channel, the wetting phase channel and the non-wetting phase channel are respectively located on both sides of the pore throat channel, the caliber of the wetting phase channel and the caliber of the non-wetting phase channel Both are larger than the smallest caliber of the pore-throat channel. The micro-reservoir model in the present invention provides an experimental model for the study of the imbibition mechanism of real reservoirs by setting wetting phase and non-wetting phase channels with a diameter larger than the pore-throat channel, and also provides an intuitive presentation of imbibition oil recovery development The method of mesopore scale oil-water distribution and migration mode can greatly shorten the research and experiment time, and contribute to the theoretical study of reservoir imbibition mechanism.

Description

technical field [0001] The embodiments of the present invention relate to reservoir development technology, and in particular to a microscopic reservoir model and a method for making and using the same. Background technique [0002] In low-permeability reservoirs, carbonate reservoirs and tight reservoirs, due to the extensive development of micro-nano pore throats and fractures, the injection pressure is too high, the injectability is poor or the injected water channels along the fractures in the conventional water injection development process. It is difficult to achieve effective development due to serious mine field problems. The method of imbibition oil recovery is different from water injection displacement. It can take advantage of the strong capillary force of micro-nano pore throats, replace oil and water with capillary force as the driving force, replace crude oil in tight matrix, and use widely developed natural fractures and Artificial fractures serve as drainag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 于馥玮李俊键姜汉桥李金鸿乔岩成宝洋范桢沈康琦苏航
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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