High-temperature high-pressure clamp for testing rock core by nuclear magnetic resonance

Abstract

The invention provides a high-temperature high-pressure clamp for testing rock core by nuclear magnetic resonance, which is applied to rock core dynamic experiments in a laboratory. The clamp mainly comprises an annulus pressure part, a high-temperature heating part, a displace part and a nuclear magnetic resonance part, wherein a sealing end cover and a lock nut are arranged at two ends of a cavity of the clamp; an annulus pressure oil inlet pipe and an annulus pressure oil drain pipe pass through the sealing end cover and are communicated with the cavity of the clamp; a spiral heat-conducting oil pipe is arranged between an insulating shell and the cavity of the clamp; two cylindrical rock core tops and sealing members are arranged in a fluorine rubber tube; a displacing oil inlet pipe and a displacing oil outlet pipe are fixed at two ends of the cylindrical sealing members; a nuclear magnetic resonance coil frame is arranged in the cavity of the clamp; and a nuclear magnetic resonance coil is arranged in an annular space formed between the outer wall of the nuclear magnetic resonance coil frame and the cavity of the clamp. The clamp has the advantages of simulating temperature and pressure of the rock core in the stratum to ensure that a nuclear magnetic resonance instrument can measure the physical parameters of the rock core under the condition of simulating the stratum.

Description

technical field [0001] The invention relates to the technical field of petroleum exploration and development, and is an instrument for performing core dynamic experiments in a laboratory, in particular to a nuclear magnetic resonance gradient core analyzer for performing nuclear magnetic resonance core dynamic experiments, which is a dedicated high-temperature and high-pressure nuclear magnetic resonance gradient core analyzer. Holder. Background technique [0002] In the dynamic experiment of rock core in the laboratory, the core holder is a tool for sealing and holding the rock core, which assists in the completion of the core physical property test and related experiments. [0003] At present, there are three types of sealing devices for core holders at home and abroad: [0004] The first type is a mechanical seal, which seals the side surface of the cylindrical rock core sample by mechanically compacting the rubber sleeve, such as using a jack or a screw thread to press...

AI Technical Summary

Problems solved by technology

Most of the core experiments are carried out at room temperature, and the working pressure during the experiment is low, so that the final measured parameters can not truly reflect the actual situation of the core under the high temperature and high pressure underground

The working environment of the probe used in the existing nuclear magnetic resonance instrument is generally room temperature and standard atmospheric pressure, which cannot imitate the actual situation of the core under high temperature and high pressure underground

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