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Rock sample coring device

A technology of rock samples and coring devices, applied in the direction of sampling devices, etc., can solve the problems of large loss of natural gas, influence of natural gas, and long time to obtain rock samples, etc., and achieve the effects of accurate natural gas content, optimistic application prospects, and convenient and large-scale testing

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

Because shale formations are typically deeper and take longer to obtain rock samples, this escape is more severe, resulting in greater loss of gas and greater volatility in the amount lost
This loss can lead to large errors in estimates of lost natural gas, which in turn can lead to large errors in estimates of gas storage in formations such as shale formations
This will have a greater impact on the further development and research of natural gas

Method used

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing.

[0025] figure 1 The overall structure of the rock sample coring device 10 (hereinafter referred to as the device 10 ) of the present invention is schematically shown. The device 10 includes a housing for housing a rock sample 20 . The containing cylinder includes a cylinder body 11 and a cylinder cover 12 connected with the cylinder body 11 . The first end 111 of the cylinder body 11 is open, the second end 112 is closed, and the cylinder cover 12 is arranged at the first end 111 to surround the rock sample 20 together with the cylinder body 11, providing the rock sample 20 with a space suitable for coring. Sample holding chamber 30 .

[0026] Preferably, the cylinder cover is connected to the cylinder body in a sealed manner, so that the pressure in the containing cylinder can be kept constant, and then the pressure in the containing cylinder can be close to the pressur...

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Abstract

The invention relates to a rock sample coring device. The rock sample coring device comprises a containing barrel for containing a rock sample, and coring equipment which is connected with the containing barrel and can stretch into the containing barrel, wherein the coring equipment can core the rock sample in the sample containing barrel. By using the coring device, the rock sample for more precisely estimating the content of natural gas can be provided.

Description

technical field [0001] The invention relates to the technical field of geological exploration and development, in particular to a rock sample coring device. Background technique [0002] In formations such as shale formations, a large amount of natural gas is usually stored in an adsorbed or free form, which belongs to unconventional gas reservoirs. In shale, the content of natural gas stored in this form is generally greater than 90%, so its content is directly related to the enrichment degree of natural gas and development technology. [0003] In my country, rock samples of shale formations are usually obtained through unsealed methods, and the rock samples are tested to estimate the natural gas content in the formations. During the process of obtaining rock samples, the adsorbed or dissociated natural gas in the rock samples, especially the adsorbed or dissociated natural gas on and near the surface of the rock samples, is easy to escape under the action of pressure drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/08
Inventor 聂海宽胡宗全边瑞康杜伟李朋威苏坤高波彭勇民张英
Owner CHINA PETROLEUM & CHEM CORP
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