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A fire-flooding mining method of edge water invasion heavy oil reservoir with formation dip angle

A mining method and a technology of formation dip angle, which are applied in the fields of production of fluids, earthwork drilling, wellbore/well components, etc., can solve problems such as failure of fire flooding projects, low temperature oxidation, and no fire flooding development method proposed.

Active Publication Date: 2022-06-03
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For heavy oil reservoirs invaded by edge water, due to the energy supplement of edge water, the pressure at the downdip part is higher than the pressure at the updip part. , there is a problem that the gas injection pressure is high and the fire line is difficult to expand to the lower part of the structure. When the combustion front advances slowly and is lower than the lower limit of the high-temperature combustion speed, it will turn into low-temperature oxidation or even fire extinguishing, resulting in the failure of the entire fire flooding project
[0003] At present, no effective fire flooding development method has been proposed for heavy oil reservoirs invaded by edge water with formation dip

Method used

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  • A fire-flooding mining method of edge water invasion heavy oil reservoir with formation dip angle
  • A fire-flooding mining method of edge water invasion heavy oil reservoir with formation dip angle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Fire flooding development: inject air into the gas injection well, i.e. a discharge gas injection well, using electric ignition, the ignition temperature is 400 ° C

[0042] Production well daily production liquid control: focus on the first two rows of production wells where the combustion front does not reach the liquid production volume control. when

[0043] Combustion front monitoring: focus on monitoring the first two rows of production wells where the combustion front has not reached. When the combustion front is at a

[0045] Fire flooding has been in production for 18 years, the stage recovery degree is 28.5%, and the recovery factor is 54.5%, which is 25.3% higher than the huff and puff.

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Abstract

The invention discloses a fire flooding mining method for edge water intrusion heavy oil reservoirs with stratum dip angle. In the present invention, the gas injection wells are arranged in the low part of the structure, the production wells are arranged in the updip direction, and the fire line is swept up from the low part in the updip direction, and the driving force provided by the fire drive and the power supplied by the edge water energy are used to overcome the effect of gravity to realize the production in the updip direction The oil production well is used to solve the problem of poor adaptability of the conventional fire flooding method of "moving wind and connecting fire" from the structural high part of the edge water intruded reservoir, improve the single well production of this type of reservoir, extend the development life, and further increase the recovery rate.

Description

A fire-flooding method for edge water invading heavy oil reservoir with formation dip technical field The present invention relates to oil exploitation technical field, be specifically related to a kind of edge water with formation dip invading heavy oil reservoir Fire drive mining method. Background technique [0002] For the heavy oil reservoir with formation dip, the conventional fire flooding method is to deploy a row of gas injection wells at the structural high position, Several rows of production wells are deployed below the gas injection wells, and the live line spreads from the gas injection wells to the production wells. When the live line reaches the first row of production wells, the The gas injection wells at the high position are closed, the first row of production wells are converted into gas injection wells, and the live line continues to spread to the next row of production wells. When the second row is producing, the gas injection wells in the previou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/30E21B43/243E21B43/16E21B43/32
CPCE21B43/30E21B43/243E21B43/168E21B43/32
Inventor 武毅高飞海东明刘畅葛明曦冯天李群宋杨宫宇宁李巍李迎环韩煦刘茜刘冰鑫
Owner PETROCHINA CO LTD
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