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Multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow simulation device

A technology of gas-liquid two-phase flow and coalbed methane well, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., and can solve problems such as interlayer interference

Inactive Publication Date: 2015-03-25
贵州省煤层气页岩气工程技术研究中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Due to the differences in reservoir pressure, coal rank, gas content and other parameters between the coal seams of multi-layer co-production CBM wells, interlayer interference often occurs in the gas-liquid two-phase flow stage

Method used

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  • Multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow simulation device

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Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings, but not as any limitation to the present invention.

[0023] Embodiment of the present invention: a coalbed methane wellbore gas-liquid two-phase flow simulation device for multi-coal seam co-production, as attached figure 1 As shown, it includes a recovery system 1, the recovery system 1 is connected to the top of the wellbore simulation device 2, the reservoir simulation system 3 is connected to the guide hole 6 in the wellbore simulation device 2, and the adjustment system 4 is connected to the outside and bottom of the wellbore simulation device 2 for Control the inclination of the wellbore simulation device 2, and the data acquisition system 5 is connected to the connection between the recovery system 1, the wellbore simulation device 2 and the reservoir simulation system 3, wherein the wellbore simulation system 2 can provide a gas-liquid two-phase flow we...

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Abstract

The invention discloses a multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow simulation device. The simulation device comprises a recovery system connected to the top of a shaft simulation device. A reservoir simulation system is connected with a guide hole in the shaft simulation device, an adjusting system is connected to the outer side and the bottom of the shaft simulation device and used for controlling inclination of the shaft simulation device, and a data acquisition system is connected to joints between the recovery system, the shaft simulation device and the reservoir simulation system. The simulation device can simulate the physical process that under the conditions of a certain shaft length, a hole drift angle and the like, multiple seams are sequentially desorbed under the original reservoir condition after water is drained and pressure is reduced and output is generated through an annulus of a coal seam gas shaft and an oil pipe., the displacement and the casing pressure are adjusted, flow pressure and gas output data are recorded and analyzed, the characteristics of multi-seam joint exploitation coal seam gas shaft gas-liquid two-phase flow are qualitatively recognized, an optimized discharge and recovery working system is acquired, and a guidance suggestion is provided for formulation of the on-site coal seam gas well discharge and recovery working system.

Description

technical field [0001] The invention relates to a gas-liquid two-phase flow simulation device for coalbed methane wellbore in multi-coal seam co-production, and belongs to the technical field of coalbed methane drainage. Background technique [0002] Due to the common characteristics of low pressure, low permeability and low gas saturation in my country's coalbed methane reservoirs, the development of coalbed methane wells generally has low single well production and poor economic benefits. If only the method of pumping formation water in the coal seam is used to reduce the pressure of the coal seam to release the methane gas adsorbed in the coal seam without taking any measures to increase production, not only will the single well production of coal bed methane be low, but also the production of coal bed methane development wells will be low. will lose its mining value. [0003] In order to increase the output of single well of coalbed methane and obtain considerable econo...

Claims

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Application Information

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IPC IPC(8): E21B43/14E21B47/00
CPCE21B43/006E21B43/14E21B47/00
Inventor 易同生叶姜赵霞金军周效志赵凌云白利娜罗开艳陈捷高为曾家瑶
Owner 贵州省煤层气页岩气工程技术研究中心
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