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Rock core sealing storage device, gas sampling device and sampling method

A technology of sealed storage and gas devices, which is applied in the field of oil and gas exploration and development, can solve the problems of oil and gas loss, damage to rock cores, easy loss of rock oil and gas, etc., achieve good protection, ensure sealing performance, and facilitate sample loading and dismantling.

Pending Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These techniques need to destroy the core samples. Therefore, it is necessary to wait until some non-destructive core field work is completed, and the waiting period will inevitably cause a large amount of oil and gas loss.
In addition, the conventional core box is an open system. When the core is put into this type of core box, the oil and gas of the rock are not only easy to lose, but also the core is easily affected by air oxidation and deliquescence, which will destroy the precious core.

Method used

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  • Rock core sealing storage device, gas sampling device and sampling method
  • Rock core sealing storage device, gas sampling device and sampling method
  • Rock core sealing storage device, gas sampling device and sampling method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] see Figure 1-Figure 2 , the present invention provides a core sealing preservation device, comprising: a core cylinder 100 for sealing and preserving the fresh core 107 obtained by drilling, and an adjustment assembly is connected to the axial end of the core cylinder 100, through adjustment In the assembly, the extension length of the adjustment screw 101 in the storage core 100, and the sliding block 103 that is in contact with the end of the adjustment screw 101 and can be in contact with the axial end face of the rock core 107, makes the sliding block 103 contact the end face of the rock core 107, and then makes the The core 107 is fixed along the axis of the core cylinder 100. Inside the core cylinder 100, a plurality of sealing bands are arranged at intervals along its axial direction. The core 107 is axially segmented and sealed.

[0043] By sealing and preserving the drilled fresh core 107 in the core tube 100, the oxidation and deliquescence of the core 107 c...

Embodiment 2

[0047] The core storage tube 100 in the present invention is a detachable structure, specifically comprising two semi-cylindrical shells connected separately, and a semi-cylindrical groove for placing the rock core 107 is opened on the shells. After the two shells are assembled , the two semi-cylindrical grooves are combined to form a hollow cavity for accommodating the rock core 107 . Two ends of the core cylinder 100 respectively include an open end and a sealed end, and an end cap 102 is screwed to the open end.

[0048] see figure 1 In this embodiment, the two semi-cylindrical shells mainly include two symmetrically arranged upper half-cylindrical shells 108 and lower half-cylindrical shells 112 , and the two shells form the overall structure of the core cylinder 100 after being closed. Wherein the upper semi-cylindrical body 108 and the lower semi-cylindrical body 112 are provided with semi-cylindrical grooves along the axial direction, and the two semi-cylindrical groov...

Embodiment 3

[0057] see figure 1 , and combined with figure 2 In this embodiment, the assembly and fixing of the two cylinders is completed through the fixing assembly socketed on the outside of the cylinder radially. The fixed connection of the cylinder body connected by the body is an integral structure. The fixed assembly specifically includes a fixed upper cover 104 and a fixed base 113, and a swing bolt 110 that connects the fixed upper cover 104 and the fixed base 113 into an integral structure. The fixed upper cover 104 includes a concave tapered surface of 90° and can be connected with the storage core. The V-shaped groove surface that is tangent to the outer cylindrical surface of the cylinder 100, the opening end of the inner concave conical surface is a concave cuboid, and the two sides of the short side of the concave cuboid are flat square blocks, and there are two square blocks on the two square blocks. Cylindrical bore.

[0058] The fixed base 113 includes an inner cone ...

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Abstract

The invention discloses a rock core sealing storage device, a gas sampling device and a sampling method, and the rock core sealing storage device comprises a core storage cylinder with a detachable structure and used for sealing and storing a drilled rock core; the adjusting assembly is connected to the end part of the core storage cylinder and is used for fixing the core along the axial direction of the core storage cylinder; a plurality of sealing strips are arranged in the core storage cylinder at intervals in the axial direction and are used for sealing the core in a segmented manner. According to the rock core sealing and storing device, air can be effectively isolated, oxidation and deliquescence of the rock core are avoided, segmented sealing and storing of the rock core are achieved, and oil gas escaping from each section of the rock core can be independently stored in the corresponding layer section. By means of the core storage barrel assembled in a split mode, loading and unloading of a core sample are facilitated, the adjusting assembly installed in the core storage barrel can seal and adjust the axial space of the end face of the core, the core is not subjected to axial extrusion force while being fixed, and the core column sample is protected and loosened, and oil gas in a core column is prevented from escaping in the axial direction.

Description

technical field [0001] The invention relates to the technical field of oil and gas exploration and development, in particular to a sealed and preserved rock core device, a gas sampling device and a sampling method. Background technique [0002] Oil and gas mainly occur in rock pores and fractures. Obtaining cores of target intervals through drilling and fine analysis are the most direct means to determine oil and gas enrichment and high-yield intervals. Homogeneity, especially for shale oil and gas rock samples, so it is necessary to carry out a certain density of oil and gas experimental detection and analysis on the cores of different intervals, so as to further optimize the oil and gas enrichment and high yield development intervals, and judge the oil and gas components according to the characteristics of oil and gas components Elastic drive. [0003] Oil and gas, especially light oil and gas, are easy to lose. Core laboratory analysis often results in distorted test res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22G01N1/10B65D81/24B65D53/00B65D39/08B65D25/10B65D25/00B65D6/02
CPCG01N1/10G01N1/2226B65D7/06B65D25/10B65D25/00B65D53/00B65D39/08B65D81/245G01N2001/1031
Inventor 蒋启贵黄泽光钱门辉陈彦鄂马媛媛刘鹏黎茂稳
Owner CHINA PETROLEUM & CHEM CORP
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