Method for Measuring the Migration Law of Precrosslinked Gel Particles in Microscopic Pore Throats of Rocks
A technology of gel particles and micro-pores, which can be used in measurement devices, suspension and porous material analysis, permeability/surface area analysis, etc. The effect of enhanced oil recovery
Active Publication Date: 2020-02-14
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Among them, the underground crosslinking time of the crosslinked gel system is poorly controllable, and the components are prone to separation under complex underground environmental conditions. The probability is reduced, and the application effect of the mine is affected
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[0032] In order to make the above purpose and implementation process of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] The embodiment of the present invention provides a method for visually measuring the migration law of pre-crosslinked gel particles in the microscopic pore throats of rocks. carry out testing.
[0034] First introduce the visual measurement platform, such as figure 1 As shown, the visual measurement platform includes: sampling pumping and flow monitoring equipment 1, variable diameter adapter 2, rock microscopic pore throat model 3, microscopic holder 4, real-time pressure measurement and acquisition system, visual image acquisition and analysis system And effluent collector 10.
[0035] Injection pumping and flow monitoring equipment 1 contains and transports the pre-crosslinked gel particle solution, which c...
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Abstract
The invention provides a measurement method for the migration rule of pre-crosslinked gel particles in a rock microscopic pore throat. The method includes: preparing a pre-crosslinked gel particle solution; building a visual measurement platform, and installing a rock microscopic pore throat model; utilizing a visual image acquisition and analysis system and a real-time pressure measurement and acquisition system respectively for real-time and visual capture and measurement of the morphologic change and pressure change of pre-crosslinked gel particles when passing the rock microscopic pore throat model; analyzing the changes to acquire microscopic seepage parameters of the pre-crosslinked gel particles when passing the rock microscopic pore throat model, and performing autoregression of amathematical model corresponding to the morphologic change and pressure change of the particles; and analyzing the migration rule of the pre-crosslinked gel particles in the rock microscopic pore throat, thus realizing integrated measurement of deformation, blockage, breakage and other morphologic change characteristics and real-time pressure change situation involved when the pre-crosslinked gelparticles pass through the rock microscopic pore throat.
Description
technical field [0001] The disclosure belongs to the technical field of oilfield exploitation, and relates to a method for visually measuring the migration law of pre-crosslinked gel particles in microscopic pore throats of rocks. Background technique [0002] Most of my country's oilfields belong to continental deposits with complex geological structures and significant differences in reservoir permeability. In order to enhance oil recovery, most domestic oil fields injected water into the oil layer through water injection wells in the early stage, and then enhanced oil recovery through water flooding. Due to the serious heterogeneity of the reservoir, the heterogeneity of the reservoir plane and vertical direction makes the flow resistance of the fluid in the horizontal direction and the vertical direction in the reservoir and the flow in the horizontal direction and the vertical direction have great differences. At the same time, due to the viscosity difference between w...
Claims
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IPC IPC(8): G01N15/08
CPCG01N15/08
Inventor 巩亮李勇铜祝仰文白章侯健曹绪龙郭兰磊姜祖明
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)