A core sample holder assembly for performing a laboratory magnetic resonance measurement of a core sample taken from a hydrocarbon containing formation is provided. The assembly comprises a pressure chamber provided by a hull and one or more flanges are sealingly coupled with the hull. A flexible core sample holder sleeve is arranged within the pressure chamber and is sealingly coupled with at least one of the flanges. An overburden fluid injection port is in fluid communication with an annular space between the hull and the flexible sleeve and is configured to inject overburden fluid into an annular space between the hull and the flexible sleeve. A pressure regulator is configured to maintain the overburden fluid in the annular space at an elevated pressure. A radio-frequency antenna, within the pressure chamber and wrapped around the sample holder sleeve, is configured to receive an electromagnetic-signal from the core sample. In use, the core sample is arranged substantially within the sleeve.

Formation core sample holder assembly and testing method for nuclear magnetic resonance measurements

The invention relates to a rock core holder compatible with nuclear magnetic resonance, which can simulate pressures and temperatures of deep reservoirs, perform oil water displacement of a rock core under simulated formation conditions, and simultaneously perform nuclear magnetic resonance on-line measurement. According to the invention, a radio frequency coil is embedded in the rock core holder, and the signal to noise ratio is greatly increased when the rock core holder is compared with a conventional rock core holder. The rock core holder is made of nonmagnetic nonmetal materials, which avoids the damage of the magnetic field uniformity caused by magnetic materials, and also avoids the generation of eddy current in the holder by a pulse gradient. Compared with a conventional rock core holder, the invention not only greatly increases the signal to noise ratio, but also fully ensures the accuracy of nuclear magnetic resonance measurement results at a high temperature and a high pressure. The holder is applicable to on-line measurement of nuclear magnetic resonance relaxation spectra, diffusion-relaxation two-dimensional spectra, and imaging methods during rock core oil water displacement at a high temperature and a high pressure. In addition, the invention performs real-time tracking compensation of temperatures and pressures of ring-crush fluid, and thus ensures the reliability of rock core simulated formation conditions.

Rock core holder compatible with nuclear magnetic resonance

The invention discloses a device and a method for low-temperature high-pressure nuclear magnetic resonance imaging of a natural gas hydrate, and belongs to the field of basic physical property research of natural gas hydrates and exploitation technologies of hydrates The device provided by the invention comprises end covers, an inner pipe, a vacuum outer pipe, a circulating fluid inlet, a circulating fluid outlet, sealing rings, filter screens and heads The heads and the inner pipe compose an enclosed space The enclosed space is a test area of a nuclear magnetic resonance imaging system The vacuum outer pipe, the inner pipe and the end covers compose a space The space is utilized for realizing reaction temperature control through circulating fluid circulation All the parts of the device provided by the invention are prepared from a non-metallic material of polyamide-imide except the filter screens and the sealing rings The device provided by the invention is vertically put into an imaging probe of a nuclear magnetic resonance imaging instrument, wherein design pressure is in a range of 0 to 40MPa and a design temperature is in a range of -20 to 180 DEG C Through the device and the method, the research on natural gas hydrate generation and decomposition characteristics under multiple deposition conditions is realized The device adopts a small amount of a magnetic material, has high pressure resistance, does not produce any influence on a nuclear magnetic resonance system, has a compact structure and can be used conveniently

Device and method for low-temperature high-pressure nuclear magnetic resonance imaging of natural gas hydrate

An embodiment of the utility model provides a pressurization constant temperature control device and a core test system, wherein the core test system comprises a computed tomography (CT) scanner (1), a core holding unit (2), an injection pump (3) and a pressurization constant temperature control device (4). The pressurization constant temperature control device (4) comprises a motor (410), a gear set (420), a first circulating pump (431), a second circulating pump (432), a first temperature transmitter (491), a second temperature transmitter (492), a temperature control device (440), one-way valves(451) -(454) and a ring-pressuring pump (470). Two circulating pumps opposite in operating directions are adopted as a double-power device, and therefore the problem that a drying oven and devices alike can not be used to carry out constant temperature control of a CT scanning core displacement test system in existing technology is resolved.

Pressurization constant temperature control device and core test system

The invention discloses an apparatus for measuring the interface tension and the contact angle under vacuum controlled-temperature conditions, and a method thereof. The apparatus comprises a vacuum controlled-temperature cavity made of quartz glass and having double side observation windows, a vacuum connecting fitting, a syringe pump, a syringe pump control part, a camera with a telecentric lens, and a parallel light source; and the contact angle and the interface tension are obtained through shooting the profile image of a liquid drop and adopting fitting Young-Laplace equation test. The apparatus and the method can be used to analyze the contact angle and the interface tension under different pressures, have extremely wide popularization prices in the fields of oilfields, petrochemical engineering and new material researches, allow the interface tension and the contact angle to be measured by stimulating the practical degree of vacuum and temperature of space especially in a space environment stimulation experiment, and are very effective.

Method for measuring interface tension and contact angle under vacuum controlled-temperature conditions, and apparatus thereof

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

Sand-filling type clamp fastener for nuclear magnetic resonance imaging

The invention relates to an interface tension measuring device and method by a hanging drop or bubble blowing way under high pressure and belongs to the technical field of high-temperature high-pressure interface tension measuring. The device comprises a window pressure chamber device composed of a metal pressure chamber cylinder body and high pressure resistant glasses at two ends, a liquid drop/bubble injection device, a support and locking device and a photo and data processing device, wherein a liquid/gas inlet hole is formed in the side wall of the pressure chamber cylinder body and connected with a gas cylinder or a liquid charging pump through a quick connector, so as to realize the feeding of environmental gas or liquid into the pressure chamber cylinder body; a liquid/gas outlet hole is connected with a three-way connector, one path of the three-way connector is connected with a drain valve, and the other path is connected with a vacuum pump for vacuum-pumping of the pressure chamber; the liquid drop/bubble injection device comprises an injection tube and a pressure sensor; the injection tube is inserted into the cylinder body, and is sealed and connected with the pressure sensor to monitor the injection pressure, and the other end of the injection tube is connected with the liquid charging pump or the gas cylinder through a precision needle valve; the support and locking device comprises a base, a support frame and a locking bolt; the photo and data processing device comprises a CCD camera, a backlight and a data processing computer.

Interface tension measuring device and method by hanging drop or bubble blowing way under high pressure

Belonging to the technical field of chemical engineering and petroleum engineering, the invention relates to a device and a method for determination of an oil gas minimum miscibility pressure through a magnetic resonance imaging technology. The device mainly comprises a magnetic resonance imaging system and a gas injection system. For the magnetic resonance imaging system, a pressure vessel is arranged in a magnetic resonance imaging instrument, a flat bottom test tube is positioned in the high pressure vessel, and the magnetic resonance imaging instrument is electrically connected to a data acquisition and processing system. The method for determining the minimum miscibility pressure of gas and oil firstly makes use of a magnetic resonance imaging technology to determine the signal strength distribution of oil in the flat bottom test tube so as to obtain a signal strength change curve of oil in gas and liquid phases within an imaging visual field under certain temperature along with the variation of pressure. By determining the intersection point of the signal strength curve and a pressure axis, the minimum miscibility pressure of gas and oil can be obtained. The method can determine the minimum miscibility pressure of gas and oil and enhance the understanding on the gas-liquid two-phase equilibrium law of gas and oil, thus being able to provide basic physical property data for underground multiphase multicomponent migration law analysis of light hydrocarbon and CO2 tertiary oil recovery.

Device and method for determination of oil gas minimum miscibility pressure through magnetic resonance imaging technology

A bubbling type system for gathering CO2 by a hydrate process belongs to the technical field of hydrate application, and comprises a bubble column, a gas intake pressurization system, a dual-refrigerating system, a gas gathering system, a separating medium circulation system and a computer data acquisition system. Mixed gas is conveyed in the bubble column after being pressurized by the gas intake pressurization system, the bubble column is filled with a separating medium, and is introduced into the bubble column after being cooled to the set temperature by the dual-refrigerating system, and CO2 hydrates are generated at low temperature. A reducing valve is arranged outside the bubble column, CO2 is enabled to be separated through a depressurization method, the gas flow after CO2 separation is measured by a flowmeter, gas components are analyzed by a gaschromatograph, the working parameters during the separation process, such as temperature, pressure signal and flow signal, are acquired and analyzed in time by the computer data acquisition system. The device is low in cost, has basic significance in mastering the gas separation technology adopting the hydrate process, and has an important value in the aspects of effective CO2 gathering in a power plant and high-purity utilization of hydrogen energy.

Bubbling type system for gathering carbon dioxide (CO2) by hydrate process

The invention relates to an in-porous-medium fluid temperature visualization measuring device, and belongs to the technical field of carbon dioxide sealing and storage. The in-porous-medium fluid temperature visualization measuring device is characterized by comprising a nuclear magnetic resonance system, an injection recovery system, a temperature and pressure control system and a computer data collection system. Carbon dioxide and fluid pass through a constant-temperature constant-pressure pump to enter a porous-medium sample in a rock core sample tube, carbon dioxide gas and fluid which flow out from the rock core sample tube pass through a counterbalance valve to enter the injection recovery system, circulation is carried out on the exterior of the rock core sample tube through a temperature-control fluid constant-temperature tank to conduct temperature control over the rock core sample tube, working parameters such as temperature signals and pressure signals in the measuring process are all collected and analyzed by the computer data collection system in real time, and the temperature visualization measuring is carried out on the whole gas-fluid injection process by a nuclear magnetic resonance imager. The in-porous-medium fluid temperature visualization measuring device has the advantages of being capable of rapidly and economically achieving temperature variation monitoring in the carbon dioxide sealing and storage process, obtaining the heat transfer coefficient in the sealing and storage process and improving the carbon dioxide sealing and storage efficiency.

In-porous-medium fluid temperature visualization measuring device

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Yang Mingjun

Author Tools

Chat about Author