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Fast desorption meter for gas content of goal seam

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

Active Publication Date: 2007-09-12
PETROCHINA CO LTD
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AI Technical Summary

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

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: Refer to Fig. 1. The coal seam gas content rapid desorption instrument of the present invention is composed of three parts: a computer 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 5 is arranged in the ai...

Embodiment 2

[0029] Embodiment 2: refer to accompanying drawing 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...

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Abstract

This invention relates to a coal seam gas content quick desorption instrument design to test coal core, quickly and accurately determine coal seam gas content. The invention include computer processing, quick desorption and measuring system. The feature is; Quick desorption system include sample sealable tank and chip sample platform. Sealable tank top has sealing cover, and inter has whip piece. Sealable tank connect with intake pipe and vent-pipe, vent-pipe connect measuring system. Sealable tank fix on platform. Quick desorption system include measuring cylinder and water bottle, measuring cylinder's top link vent-pipe, measuring cylinder's bottom through gas tube connect with water bottle. The effect: this invention can test shattered coal core sample, pick coal seam air content data, quickly appraise this region's coal-seam gas potential stocks and exploration prospects, research differently region gas content characteristic, gas content distribution and coal reservoir bed.

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 Applications(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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