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Device and method for manufacturing non-diagenetic hydrate siltstone core

A technology for making devices and hydrates, which is applied in the preparation of test samples, etc., and can solve problems such as refractory hydrate cores

Active Publication Date: 2019-11-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The problem to be solved by the present invention is to provide a device and method for making a rock skeleton and generating hydrate inside the rock by using the particle self-sedimentation method to solve the problem that the existing rock core making technology is difficult to correctly make a hydrate core that conforms to the real formation conditions To obtain a hydrate rock sample preparation method that is closer to the physical and mechanical properties of the actual formation, and provide experimental support for the drilling and development of natural gas hydrate resources

Method used

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  • Device and method for manufacturing non-diagenetic hydrate siltstone core

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Embodiment Construction

[0018] The method aims at making a hydrate-containing siltstone core with a diameter of 25 mm and a height of 50 mm for quartz sand with a small size range and a particle size larger than 250 mesh and smaller than 1500 mesh. The method is now described in detail.

[0019] Step 1: Assemble the detachable particle sedimentation device and add materials to it. The specific steps are:

[0020] (1) Fill the sealing silicone strip 3 into the cylindrical groove spliced ​​by the two semicircular grooved cylinders as shown in the figure and the lower semicircular and semi-annular groove, and align the lower ring part of the sealing silicone strip 3 and the downward fixing base 2 The semi-circular and semi-annular grooves are spliced ​​on the fixed base 2.

[0021] (2) Utilize the bolt to pass through the horizontal fixing hole on the semicircle grooved cylinder 1, then fasten with nuts, so that the two semicircle grooved cylinders 1 are fastened, and utilize the bolt to pass through t...

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Abstract

The invention discloses a device and a method for manufacturing a non-diagenetic hydrate siltstone core. An experimental device constructs a core skeleton by utilizing a method of self-precipitation of silt particles, by a freezing mode, pore water is condensed into ice as a cement object to improve the strength of a core, after cutting is performed, the ice is converted into a hydrate at low temperature and high pressure environment, and a weakly cemented core containing the hydrate is finally formed. After the hydrate in the core is decomposed, the hydrate has the characteristics of recoverywithout cementation, low strength and no rock formation, and can better simulate a marine hydrate layer.

Description

technical field [0001] The invention relates to the technical field of new energy development, and relates to an experimental device and method for generating hydrate inside a rock core after making an unbonded ultrafine silt skeleton by using the sedimentation of solid particles in liquid. Background technique [0002] At present, people are paying more and more attention to the exploitation of hydrates, and understanding the decomposition status of hydrates to guide the exploitation of hydrates has become the focus of attention. The natural gas hydrate (combustible ice) in the Shenhu sea area of ​​the Pearl River Estuary in China was ignited for trial mining on May 10, 2017. After 31 days of trial mining, the total gas production reached 210,000 cubic meters, with an average daily output of 6,800 cubic meters. However, it still has not reached the standard for commercial exploitation, so it is very important to actively carry out research on hydrate reservoirs. [0003] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 张卫东王飞赵寿强王富华时贤吕俊杰许昊苒
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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