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Underground combustion convection heating method

A convective heating and burner technology, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of large heat loss, high cost, low utilization rate, etc., and achieve the effect of reducing heat loss

Active Publication Date: 2019-09-17
赵金岷
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide an underground open combustion convection heating system with high heating efficiency and safety in order to solve the problems of large heat loss, low utilization rate and high cost in the process of exploiting oil shale and heavy oil fluids using fluid convection heating technology. heating method

Method used

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Examples

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Effect test

Embodiment 1

[0028] Example 1 Underground Open Combustion Convection Heating Method

[0029] Underground open combustion convection heating method, which includes:

[0030] 1) Inject high-pressure air into the casing of the heater well;

[0031] 2) The gas and the combustion-supporting gas are respectively sent into the well casing through the pipeline, at the mining area, mixed and burned in the burner;

[0032] 3) The heat generated by the combustion of the burner heats the high-pressure air injected into the well casing, and mixes with the exhaust gas and air generated by the combustion to form a mixed heating medium;

[0033] 4) The kerogen in the heavy oil or oil shale deposit is pyrolyzed to form oil and gas, and the mixed heating medium is discharged from the oil production well;

[0034] In the step 1), the flame retardant fluid is injected through the pipeline under the burner;

[0035] The flame retardant fluid is CO 2 gas, steam or water.

Embodiment 2

[0036] Embodiment 2 Underground open combustion convection heating device

[0037] Underground open combustion convection heating device, including: well casing air injection pipe 102, combustion-supporting gas delivery pipe 101, gas delivery pipe 3, ignition device 4, burner 103;

[0038] The combustion-supporting gas delivery pipe 101 and the gas delivery pipe 3 are connected to the burner 103, and the burner 103 is arranged in the well casing 201, at the mining area;

[0039] The underground open combustion convection heating device further includes: a temperature monitoring device 5 , an air pressure monitoring device 7 , a flow monitoring device 8 , and a central controller 6 .

Embodiment 3

[0040] Embodiment 3 Underground open combustion convection heating device

[0041] Underground open combustion convection heating device, including: well casing air injection pipe 102, combustion-supporting gas delivery pipe 101, gas delivery pipe 3, ignition device 4, burner 103;

[0042] The combustion-supporting gas delivery pipe 101 and the gas delivery pipe 3 are connected to the burner 103, and the burner 103 is arranged in the well casing 201, at the mining area;

[0043] The underground open combustion convection heating device also includes: a temperature monitoring device 5, an air pressure monitoring device 7, a flow monitoring device 8, and a central controller 6;

[0044] The underground open combustion convection heating device further includes: a flame retardant fluid delivery pipe 9, the outlet of which is located at or below the burner 103;

[0045] The upper section of the flame retardant fluid delivery pipe 9 communicates with the combustion-supporting gas ...

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Abstract

The invention discloses an underground combustion convection heating method. The method comprises the steps that (1) a shaft sleeve is filled with high pressure air; (2) fuel gas and combustion-supporting gas are conveyed to the position close to the lower outlet of the shaft sleeve through pipelines respectively and are in combustion in a combustor after mixed; (3) heat produced by combustion of the combustor heats the air, and at the same time, waste gas produced by combustion is mixed with the air; flame retardant fluid is filled in the lower part of the combustor by a pipeline in the step (1); the flame retardant fluid is CO2 gas, vapor or water. The combustor is arranged under the shaft, open combustion is performed, the high pressure air isolates the flame, a hybrid heating medium is produced, a heat source is in direct contact with a heated material, the heat exchange process is omitted, and heat loss is reduced; the flame retardant fluid and the high pressure air can be converted, and one more safety shield is provided during an accident.

Description

technical field [0001] The invention belongs to the field of petroleum and oil shale exploitation, and in particular relates to an underground open combustion convection heating method and an underground open combustion convection heating device. Background technique [0002] There are widely distributed hydrocarbon reservoirs throughout the world, which represent a key source of energy for the continued development of the world economy for the foreseeable future. These reservoirs often contain viscous hydrocarbon mixtures - known as "tars", "heavy oils" or "extra heavy oils", which typically have viscosities in the range of about 3000 to 1000000 centipoise when measured at about 37.5°C. Many hydrocarbon-bearing geological formations contain such hydrocarbon mixtures that do not allow the hydrocarbon contents to flow rapidly to the wellbore for production because of their high viscosity. In certain hydrocarbon reservoirs, such as oil shale reservoirs, the hydrocarbon compon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/243E21B43/241E21B36/02
Inventor 赵金岷魏国铭
Owner 赵金岷
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