CN102062742B - Sand-filling type clamp fastener for nuclear magnetic resonance imaging - Google Patents

Sand-filling type clamp fastener for nuclear magnetic resonance imaging Download PDF

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Publication number
CN102062742B
CN102062742B CN201010587872A CN201010587872A CN102062742B CN 102062742 B CN102062742 B CN 102062742B CN 201010587872 A CN201010587872 A CN 201010587872A CN 201010587872 A CN201010587872 A CN 201010587872A CN 102062742 B CN102062742 B CN 102062742B
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China
Prior art keywords
sand
circulating fluid
magnetic resonance
type clamp
filling type
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CN201010587872A
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Chinese (zh)
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CN102062742A (en
Inventor
宋永臣
赵越超
张建华
朱宁军
刘瑜
杨明军
蒋兰兰
王同雷
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大连理工大学
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Abstract

The invention relates to a sand-filling type clamp fastener for nuclear magnetic resonance imaging, which belongs to the technical field of scientific research apparatuses for petroleum. The sand-filling type clamp fastener is vertically inserted into a micro-imaging probe of a nuclear magnetic resonance imager, the design pressure is 0-15Mpa, and the design temperature is 0-70 DEG C. The sand-filling type clamp fastener can be used for carrying out indoor experiment research on the seepage and transport properties of a multi-phase multi-component fluid in an analog core. Besides a seal ring, all components of the sand-filling type clamp fastener are made from a polyamide-imide material which does not have magnetism, meets the high-temperature high-pressure requirements and has no effect on nuclear magnetic signals. The sand-filling type clamp fastener has the advantages of compact design structure, multiple times of filling, repeatability of use, convenience of operation in an experiment process, simplicity and applicability.

Description

A kind of Magnetic resonance imaging is with back-up sand formula clamper

Technical field

The present invention relates to a kind of Magnetic resonance imaging with back-up sand formula clamper, belong to oil scientific research Instrument technology field.

Background technology

[0002] nmr imaging technique have fast, can't harm, the characteristics that show directly perceived; Can be to nuclear-spin density, relaxation time (vertically reaching laterally), fluid-flow rate, self-diffusion coefficient; And, be one of the most favourable instrument of research porous medium skeleton structure and fluid flow inside thereof based on the selective imaging in chemical shift or relaxation time.Since the eighties in last century, the MRI technology was introduced in the visual test experience of drive physical analogue; Nmr imaging technique has been widely used in the displacement test researchs such as water drive, polymer flooding, chemical flooding; But less relatively to displacement test research under the high-temperature and high-pressure conditions, this mainly is to receive core holding unit to limit.Traditional core holding unit mainly contains back-up sand formula (being commonly called as fill out sand tube) and encircles two types of pressure types, and in order to guarantee the high temperature and pressure experiment condition, material is generally stainless steel or metal alloy.And the special-purpose core holding unit of NMR has on the basis of identical function with traditional clamper except guaranteeing; Material therefor must be a high temperature high voltage resistant; And to the glitch-free nonmagnetic substance of nuclear magnetic signal, in addition, it is inner that design size wants to guarantee to insert the nuclear-magnetism probe.In order to satisfy the widespread use requirement of nuclear magnetic resonance technique in the oil research field; Famous Temco core analysis instrument company began as far back as 1980 mid-nineties 90s; Just for it special-purpose ring pressure type core holding unit is provided; But, be applicable to that particularly the product of the narrow and small cavity of the little imaging probe of High-Field nuclear magnetic resonance spectrometer does not also appear in the newspapers to back-up sand formula clamper.

Summary of the invention

In order to solve the problem that exists in the above-mentioned Magnetic resonance imaging research; The present invention provides a kind of Magnetic resonance imaging with back-up sand formula clamper; Its purpose is conveniently to utilize nmr imaging technique that the multi-phase multi-component fluid is carried out the three-dimensional visualization PHYSICAL MODELING OF IN, and test pattern is carried out multinomial seepage parameters and the fluid transport characteristics such as percolation flow velocity, diffusion and Temperature Distribution such as saturation degree that the factor of porosity of porous medium, permeability and fluid are obtained in quantitative test.

The technical scheme that the present invention adopts is: a kind of Magnetic resonance imaging is with back-up sand formula clamper, and it mainly comprises circulating fluid outlet, end cap, O type rubber seal, end socket, interior pipe, overcoat, filter screen, pressure pad and circulating fluid imported equipments and parts.The high pressure resistant cavity body structure of pipe and two end socket formation hollows in said; Wherein fill different-grain diameter and compacting and simulate the porous medium of the beaded glass of rock core, silica sand or clay; Constitute loop temperature-control sap cavity body between two end caps and an overcoat and the interior pipe, its circulation fluid import diversion trench adopts fluid to cut sth. askew and gets into the skewed slot of loop temperature-control sap cavity body; Said circulating fluid outlet, thermopair interface and circulating fluid import are separately positioned on two end caps, and loop temperature-control liquid gets into loop temperature-control sap cavity body from the circulating fluid import on the bottom end cover, and the circulating fluid outlet from upper end cover is discharged; Said end cap, end socket, interior pipe and overcoat all adopt no magnetic nonmetallic materials polyamide-imides to make.

Above-mentioned back-up sand formula clamper is arranged in the NMR imaging device, injects working fluid to back-up sand formula clamper, and to control its pressure and temperature be the setting value that requires, and with NMR imaging device test pattern is carried out quantitative test again.

The invention has the beneficial effects as follows: vertically insert back-up sand formula clamper in little imaging probe of NMR imaging instrument; Design pressure is 0 ~ 15Mpa; Design temperature is 0~70 ℃, can carry out the in-house laboratory investigation of multi-phase multi-component fluid seepage flow and transport property in the simulation rock core; Simulation core device adopts polyamide-imides and titanium metal material, does not only have magnetic but also satisfy the HTHP requirement easily, and project organization is compact, can repeatedly fill, and reuses, and experimentation is convenient and simple for operation to be suitable for.

Description of drawings

Fig. 1 is the structural drawing of a kind of Magnetic resonance imaging with back-up sand formula clamper.

Fig. 2 is the A-A sectional structure chart among Fig. 1.

Fig. 3 is the B-B sectional structure chart among Fig. 2.

Among the figure: 1, thermopair interface, 2, circulating fluid outlet, 3, end cap, 4, O type rubber seal, 5, end socket, 6, interior pipe, 7, overcoat, 8, porous medium, 9, filter screen, 10, pressure pad, 11, the circulating fluid import.

Embodiment

Fig. 1,2,3 shows a kind of Magnetic resonance imaging with back-up sand formula clamper.6 and two end sockets 5 of pipe were combined into hollow structure in this back-up sand clamper adopted one, wherein can fill the porous mediums 8 such as beaded glass, silica sand or clay of different-grain diameter, and rock core is simulated in compacting; Constitute loop temperature-control sap cavity body between two end caps 3 and overcoat 7 and the interior pipe 6; Adopt an import 11 of constant temperature fluid bath connection circulating fluid and circulating fluid outlet 2 that circulating fluid is provided to the temperature controlled fluid chamber; Constant temperature fluid import guide groove is designed to skewed slot, cuts sth. askew into fluid cavity, improves heat-transmission efficient, so that fluid cavity inner fluid uniformity of temperature profile prevents to form straight line fluid local channel.Last low head connects pipeline respectively and forms the turnover fluid passage, and external pressure unit and differential pressure transmitter, and can insert thermopair acquisition stream temperature through the thermopair interface.

Utilize the experimental procedure of the simulation core device that above-mentioned Magnetic resonance imaging detects following:

The first step is accomplished the preparation of simulation rock core.Select porous mediums such as appropriate particle size beaded glass, silica sand or clay according to the experiment needs for use, open upper end end socket and end cap, inwardly manage and be packed into selected porous medium in 6, porous media structure was stable when compacting flowed into the assurance fluid, installed upper cover and end cap; The silica sand of filling between two end sockets and the endosome is as the simulation rock core.

Second step is with the simulation core device experimental system of packing into.Constitute the temperature controlled fluid chamber between two end caps 3 and the overcoat 7, adopts one to provide the constant temperature fluid bath of circulating fluid to connect circulating fluid import 11 to the temperature controlled fluid chamber to export 2 with circulating fluid; Two end sockets insert pipeline respectively provides the fluid Vomitory; Then the simulation core device of accomplishing is fixed in the Magnetic resonance imaging magnet probe.

In the 3rd step, carry out the experiment of displacement or seepage flow.In the simulation rock core, inject working fluid, pressure can be by injection pump or counterbalance valve control; Open the constant temperature fluid bath, control simulation core temperature is stable to setting value; Temperature, pressure and differential pressure adopt thermopair, pressure unit and differential pressure transmitter to come to gather in real time respectively; Utilize NMR imaging device to experimentation carry out synchronously, the three-dimensional visualization detection by quantitative.

Claims (1)

1. a Magnetic resonance imaging is with back-up sand formula clamper; It mainly comprises circulating fluid outlet (2), end cap (3), O type rubber seal (4), end socket (5), interior pipe (6), overcoat (7), filter screen (9), pressure pad (10) and circulating fluid import (11) parts; It is characterized in that: pipe (6) and two end sockets (5) constitute the high pressure resistant cavity body structure of hollow in said; Wherein fill different-grain diameter and compacting and simulate the porous medium of the beaded glass of rock core, silica sand or clay (8); Constitute loop temperature-control sap cavity body between two end caps (3) and an overcoat (7) and the interior pipe (6), its circulation fluid import diversion trench adopts skewed slot, and fluid is cut sth. askew and got into loop temperature-control sap cavity body; Said circulating fluid outlet (2) and thermopair interface (1) are arranged on the upper end cover of one of two end caps (3); Circulating fluid import (11) is arranged on the bottom end cover of one of two end caps (3); Loop temperature-control liquid gets into loop temperature-control sap cavity body from the circulating fluid import (11) on the bottom end cover, and the circulating fluid outlet (2) from upper end cover is discharged; Said end cap (3), end socket (5), interior pipe (6) and overcoat (7) all adopt no magnetic nonmetallic materials polyamide-imides to make.
CN201010587872A 2010-12-15 2010-12-15 Sand-filling type clamp fastener for nuclear magnetic resonance imaging CN102062742B (en)

Priority Applications (1)

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CN102062742B true CN102062742B (en) 2012-09-05

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CN102901987A (en) * 2011-07-29 2013-01-30 中国海洋石油总公司 Core barrel for nuclear magnetic resonance imager
CN102507626A (en) * 2011-10-10 2012-06-20 北京大学 Rock core holder compatible with nuclear magnetic resonance
CN102495090A (en) * 2011-11-24 2012-06-13 大连理工大学 Device and method for low-temperature high-pressure nuclear magnetic resonance imaging of natural gas hydrate
CN102680372B (en) * 2012-04-26 2014-09-03 中国石油天然气股份有限公司 Pressurizing constant temperature control device and core test system
CN102704911B (en) * 2012-06-01 2016-08-03 中国石油大学(北京) A kind of multilateral well experimental model, system and back-up sand method
CN102818830B (en) * 2012-08-18 2014-06-11 中国石油化工股份有限公司 High temperature and high pressure core induced polarization potential measurement holder
US9482631B2 (en) * 2013-05-14 2016-11-01 Chevron U.S.A. Inc. Formation core sample holder assembly and testing method for nuclear magnetic resonance measurements
US10048336B2 (en) * 2013-09-05 2018-08-14 Saudi Arabian Oil Company Tri-axial NMR test instrument
CN104914122A (en) * 2014-03-11 2015-09-16 中国石油化工集团公司 Nuclear magnetic resonance core measurement apparatus capable of simulating reservoir conditions
CN103969166A (en) * 2014-05-15 2014-08-06 大连理工大学 Sand filling type clamp for industrial X-Ray CT (computed tomography) imaging
CN104390902B (en) * 2014-11-20 2017-01-25 大连理工大学 Method for analyzing pore distribution of sediment by virtue of saturation change of gas hydrate
CN104406999B (en) * 2014-11-27 2017-05-10 大连理工大学 In-situ calibration simulating measurement device and method for oil deposit seepage magnetic resonance imaging
US9851315B2 (en) 2014-12-11 2017-12-26 Chevron U.S.A. Inc. Methods for quantitative characterization of asphaltenes in solutions using two-dimensional low-field NMR measurement
US10634746B2 (en) 2016-03-29 2020-04-28 Chevron U.S.A. Inc. NMR measured pore fluid phase behavior measurements
CN106370579A (en) * 2016-08-30 2017-02-01 海安华达石油仪器有限公司 Gas permeability determinator
CN111380789A (en) * 2018-12-29 2020-07-07 中国石油大学(北京) Device and method for measuring permeability of combustible ice

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