Fast desorption meter for gas content of goal seam

A technology of gas content and desorption, applied in the field of coalbed methane exploration, can solve the problems of long test time, difficult to test quickly, and no measurement, and achieve the effect of improving test efficiency

Active Publication Date: 2009-10-14
PETROCHINA CO LTD
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Problems solved by technology

The disadvantage is that the test time of the natural desorption method is long, and it takes several months to complete a test cycle of a coal core sample. Often, the result of the gas content has not been measured for a long time after the drilling of the coalbed methane exploration well
The test results are difficult to play a guiding role in the later stage of coalbed methane drilling
Existing gas content measurement equipment is difficult to achieve rapid testing, and it is difficult to adapt to the rapidly developing coalbed methane industry. At the same time, the measurement system of these equipment uses a single volume tube for measurement, and the measurement capability is insufficient

Method used

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  • Fast desorption meter for gas content of goal seam
  • Fast desorption meter for gas content of goal seam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: see figure 1 . The coal seam gas content rapid desorption instrument of the present invention is composed of three parts: a computer acquisition and processing system, a rapid desorption system and a measurement system.

[0022] The computer acquisition and processing system includes computer processing software and data acquisition input and output.

[0023] There are four fast desorption systems, which are respectively connected to the graduated cylinder 16 of the measuring system through the exhaust pipe 4. Each fast desorption system has a coal core sample sealed tank 5 and a broken sample platform. Sealing tank 5 internal diameters are 150 millimeters, and height is 50 millimeters. The structure of sealing tank 5 is to be made of tank body 19, stirring block 6, sealing cover 3; A sealing cover 3 is arranged on the top of the tank body 19, and a sealing ring 18 is arranged between the tank body 19 and the sealing cover 3. A stirring block 6 is arr...

Embodiment 2

[0029] Embodiment 2: see attached figure 2 . The biggest difference of the fast desorption mechanism of the gas content analyzer is that there are two cylindrical stirring blocks 6 made of iron in the sealed tank 5 . In the past, we used different mechanisms such as iron block plus iron ring, discus, etc., and there were problems such as insufficient crushing and long crushing time when crushing coal samples. After two stirring blocks 6 are used to pulverize the coal sample, the two stirring blocks 6 vibrate together when the motor 10 vibrates, so that the sealed tank 5 can achieve the same crushing effect at a relatively low vibration frequency. The motor with low power is used to reduce the weight of the motor, and at the same time, the weight of the fixed base is removed, which greatly reduces the weight of the fast desorption mechanism of the whole gas content analyzer. It used to be more than 170 kilograms, but now the overall weight does not exceed 30 kilograms, which...

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Abstract

Coal seam gas content rapid desorber is used to test coal cores to quickly and accurately determine coal seam gas content. Including computer processing, rapid desorption and measurement system. Features: The rapid desorption system includes a sample sealing tank and a sample breaking platform. There is a sealing cover on the upper part of the sealing jar, and a stirring block is arranged in the sealing jar. The airtight tank is connected with an intake pipe and an exhaust pipe, and the exhaust pipe is connected with the measuring system. The airtight jar is fixed on the platform. The rapid desorption system includes a measuring cylinder and a water bottle, the top of the measuring cylinder is connected to an exhaust pipe, and the bottom of the measuring cylinder is connected to the water bottle through an air pipe. The effect is to test the coal core samples after pulverization, collect coalbed gas content data, quickly evaluate the coalbed methane resource potential and exploration prospect in this area, and study the gas-bearing characteristics, gas content distribution law and gas storage capacity of coal reservoirs in different regions.

Description

technical field [0001] The invention relates to the technical field of coal bed gas exploration, in particular to a special device for testing the gas content of coal beds. The experimental device can be used to quickly and accurately measure the gas content of coal seams in coal seam gas exploration wells. Background technique [0002] Coalbed methane is a self-generated and self-storage unconventional natural gas resource stored in coal seams. An important parameter to evaluate its enrichment degree is the gas content. To effectively evaluate whether coalbed methane in a certain area has commercial prospects, accurate gas content evaluation data must be established, and these gas content data are used for gas reservoir simulation and production prediction. Therefore, it is necessary to understand the gas content of coal seam and the desorption characteristics of coal seam, and the gas content testing equipment is the only tool to provide such data. Therefore, coalbed gas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N7/14G01N1/28
Inventor 刘洪林王红岩李景明赵庆波宁宁李贵中李五忠杨泳刘萍王勃陈振红
Owner PETROCHINA CO LTD
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