Device and method for researching rock physical property parameter change under action of acid fluid

A technology with physical parameters and acidity, which is applied in the field of research on the interaction between rock-like porous media materials and foreign fluids, can solve problems such as formation integrity instability, formation pressure rise, induced earthquakes, etc., to solve anti-corrosion and sealing problems, Reduced contact area and excellent anti-corrosion performance

Active Publication Date: 2013-04-17
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
View PDF10 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The influence of the interaction between external fluid and rock on reservoir sandstone, specifically, the change of seepage characteristics may be due to the deterioration of formation injectability caused by the decrease of rock permeability coefficient near the injection well, which has a greater impact on the flow and migration of injected fluid in the formation. The influence is great; the evolution of rock displacement pressure may cause the displacement pressure at the interface between the reservoir and the caprock to be grad

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Device and method for researching rock physical property parameter change under action of acid fluid
  • Device and method for researching rock physical property parameter change under action of acid fluid
  • Device and method for researching rock physical property parameter change under action of acid fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as Figure 1~3 As shown, a device for studying the changes of petrophysical parameters under the action of acidic fluid,

[0044] Including water tank 1, dosing chamber 2, hydrogen sulfide gas cylinder 3, carbon dioxide gas cylinder 4, reactor 5, metering pump (601-604), valve (701-720), pressure sensor (801-804), four-way (901 -903), a vacuum pump 10 , a vacuum gauge 11 , a first filter 12 , a differential pressure gauge 13 , a second filter 14 , a first tail liquid treatment port 15 and a second tail liquid treatment port 16 .

[0045] The regional liquid distribution function with the liquid distribution chamber 2 as the core, the connection form is that the vacuum pump 10 and the vacuum gauge 11 communicate with the first four-way 901 respectively, the first four-way 901 communicates with the second four-way 902 through the first ball valve 701, and the second four-way 902 The first four-way 901 is connected to the water tank 1 through the second ball valve 70...

Embodiment 2

[0058] Such as figure 1 As shown, a method for studying the change of petrophysical parameters under the action of acidic fluid includes the following steps:

[0059] Step 1. Process the tested material into a cylindrical core 5b with a diameter of 50±2mm and a length of 100±2mm. Before the test, perform physical property tests on the core 5b (porosity test, true triaxial test, acoustic emission test) and rock Mineral composition analysis (scanning electron microscope SEM, X-ray diffraction XRD), test the basic physical parameters and mineral composition of the rock before the flow reaction experiment (that is, before the chemical reaction).

[0060] Step 2. The two ends of the core 5b are respectively in contact with the upper porous gasket 5c-1 and the lower porous gasket 5c-2, and are connected to the pipeline of the device through the upper and lower end pads (5a-1, 5a-2). The overall structure is composed of an upper pad 5a-1, an upper porous pad 5c-1, a rock core 5b, a ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a device and a method for researching rock physical property parameter change under the action of an acid fluid. The method comprises the steps of wrapping a cylindrical test sample and a porous gasket by using a sealing material; putting into a reaction kettle; vacuumizing a system; saturating water to the system after being vacuumized; preparing the acid fluid according to demands and sampling and analyzing; keeping a system pipeline at constant temperature; exerting confining pressure and backpressure to the reaction kettle; exerting porous pressure; and measuring permeation coefficients and displacement pressure of the material in real time. The device is excellent in antiseptic property; due to a liquid preparation relay device, the difficulty of preparing a large-capacity acid fluid under high pressure condition is solved, and the contact area of the acid fluid with the device is reduced as much as possible; and a sealing structure of a rock core end part is in a mode that a bandage is adopted to be tightly tied and sealed with a side surface sealing material at a sharp ring of an end part gasket, so that the device is simple and economic, and at the same time, anti-corrosion and sealing are realized.

Description

technical field [0001] The present invention relates to the field of research on the interaction between rock-like porous media materials and external fluids, more specifically to a device for studying changes in rock physical parameters under the action of acidic fluids, and also to a method for studying changes in rock physical parameters under the action of acidic fluids. It is suitable for the interaction between rock-like porous media materials and foreign fluids, such as the influence of long-term chemical reactions between sandstone and injected carbon dioxide and hydrogen sulfide aqueous solutions on the evolution of physical parameters such as sandstone permeability coefficient and displacement pressure. Background technique [0002] With the demand and development of deep development and safety evaluation projects of industrial projects such as enhanced coalbed methane recovery (ECBM), shale gas recovery, enhanced crude oil recovery (EOR), and deep geothermal recove...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N17/00
Inventor 李琦刘学浩李小春方志明王燕魏宁王炳郡
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap