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Device for sampling deep well gas-liquid fluid in ultra-low permeability stratum

A liquid sampling and sampling device technology, which is applied in wellbore/well components, earth-moving drilling, etc., can solve the problems of long sampling time interval, slow pressure recovery, low sample efficiency, etc., to improve efficiency, slow down and reduce Speed, the effect of reducing the sample size

Active Publication Date: 2019-04-23
INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a method for sampling gas-liquid fluids in deep wells in ultra-low permeability formations. Long time, low efficiency of samples, etc.

Method used

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  • Device for sampling deep well gas-liquid fluid in ultra-low permeability stratum
  • Device for sampling deep well gas-liquid fluid in ultra-low permeability stratum
  • Device for sampling deep well gas-liquid fluid in ultra-low permeability stratum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] according to figure 1 , figure 2 , image 3 , Figure 4 It can be seen that a gas-liquid fluid sampling device for deep wells in ultra-low permeability formations is composed of a liquid sampling / sampling ground control system 10, a liquid sampling / sampling underground system 20, a gas sampling / sampling ground control system 30, a gas sampling / The underground sampling system 40, the packer 50, and the high-pressure driving gas source 60 are jointly composed. Liquid sampling / sampling ground control system 10 comprises a first liquid sampling controller 11, a second liquid sampling controller 12, a first liquid sampling controller 13, and a second liquid sampling controller 14; liquid sampling / sampling The underground system 20 includes a liquid driving pipeline 21, a reducing pipeline 22, a first liquid sampling pipeline 23, a second liquid sampling pipeline 24, a tee 25, a one-way valve 26, and a liquid filter 27; The sampling / sampling surface control system 30 in...

Embodiment 2

[0051] A method for sampling liquid in a deep well of a low-permeability and ultra-low-permeability formation, the steps of which are:

[0052] (1) Process and manufacture deep well gas-liquid fluid sampling devices suitable for low-permeability and ultra-low-permeability formations according to the design.

[0053] (2) According to the depth of the sampling formation, configure the liquid driving pipeline 21, variable diameter pipeline 22, first liquid sampling pipeline 23, second liquid sampling pipeline 24 and gas sampling pipeline 41 of corresponding length, and configure A high-voltage drive source 60 of corresponding volume.

[0054] (3) The liquid sampling / sampling ground control system 10 of the sampling device, the gas sampling / sampling ground control system 30, and the high-voltage driving source 60 are connected and placed in the ground sampling control room; check whether the pipeline is unobstructed.

[0055] (4) The liquid sampling / sampling underground system 20...

Embodiment 3

[0065] A deep well gas sampling method for low-permeability and ultra-low-permeability formations, the steps of which are:

[0066] (1) Gas sampling and injection volume control in low-permeability and ultra-low-permeability formations: open the valve 312 of the gas sampling controller 31, drive the gas source 60 at high pressure to pressurize the gas inlet / sampling pipeline 41, and control the gas sampling The back pressure valve 314 of the device 31 controls the sampling pressure. When the gas inlet / sampling pipeline 41 is filled with nitrogen, the valve 312 of the gas sampling controller 31 is closed; the valve 322 of the gas sampling controller 32 is opened, and the nitrogen gas is discharged, and the underground gas sample Slowly enter the gas inlet / sampling pipeline 41 , and finally enter the gas sampling container 323 . After the gas sampling is completed, the gas sampling control valve 322 is closed. The gas filter 42 only allows gas to enter, and can filter large par...

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Abstract

The invention discloses a device and a method for sampling a deep well gas-liquid fluid in ultra-low permeability stratum. The invention utilizes design for ground valve block, reducing combined design for underground sampling pipe and design for lyophilic / hydrophobic phase coating in reducing pipe to realize gas-liquid fluid sampling and accurate control on sampling process. Due to the design forground valve block, fluid, especially sampling rate and sampling volume of fluid, can be controlled, and the problems of rapid pressure drop, sample distortion, and the like, caused by the sampling process can be reduced. Due to the reducing combined design for underground sampling pipe and the design for lyophilic / hydrophobic phase coating in reducing pipe, the effective ratio of sample is increased. The device disclosed by the invention is convenient in operation; the operation method is simple and practicable; the sampling volume and the influence on stratum are greatly reduced; the deviceis suitable for deep well sampling and monitoring in low-permeability and ultra-low permeability stratums; the problems of greatly reducing stratum pressure, sample distortion, slow pressure recovery, long sampling time interval and low sampling efficiency possibly caused after the sampling of fluids in deep wells in low-permeability and ultra-low permeability stratums can be solved.

Description

technical field [0001] The invention belongs to the field of liquid and gas sampling in deep ultra-low permeability formations, and more particularly relates to a sampling device for stratified gas-liquid fluid in deep wells of ultra-low permeability formations. The present invention is applicable to gas-liquid two-phase fluid sampling in underground engineering of low-permeability and ultra-low-permeability formations, and also applicable to gas-liquid fluid sampling in underground engineering of deep formations, such as carbon dioxide geological storage in low-permeability and ultra-low-permeability formations in the Ordos Basin Gas-liquid fluid sampling and environmental monitoring required for the utilization and exploitation of resources such as coal, oil, natural gas, coal bed methane and shale gas. Background technique [0002] With the increasing impact on deep formation research and human deep underground activities, such as: oil and gas exploitation, geothermal exp...

Claims

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Application Information

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IPC IPC(8): E21B49/08
CPCE21B49/084
Inventor 魏宁李小春刘胜男胡元武
Owner INST OF ROCK AND SOIL MECHANICS - CHINESE ACAD OF SCI
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