Device and method for improving recovery of thin-bed heavy oil reservoirs based on foam flooding

A heavy oil reservoir, foam flooding technology, applied in the direction of chemical instruments and methods, production fluid, earth drilling and production, etc., can solve the problems of difficult access, thermal oil recovery method can not be applied, low secondary recovery, etc.

Active Publication Date: 2020-05-12
CHANGAN UNIV
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a device for improving the recovery of thin-layer heavy oil reservoirs based on polymer foam flooding in view of the deficiencies in the above-mentioned prior art. Foam pre-mixing allows polymer foaming liquid and carbon dioxide gas to enter the foam generator alternately, which solves the problem that only liquid enters the foam generator and gas is difficult to enter in the existing polymer foam production process. The problems of low primary and secondary recovery and thermal oil recovery in thin-bed heavy oil reservoirs provide a scientific basis for the scientific use of polymer-enhanced carbon dioxide foam to enhance the recovery of thin-bed heavy oil reservoirs and its specific on-site construction. An important theoretical basis, easy to promote the use of

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  • Device and method for improving recovery of thin-bed heavy oil reservoirs based on foam flooding
  • Device and method for improving recovery of thin-bed heavy oil reservoirs based on foam flooding
  • Device and method for improving recovery of thin-bed heavy oil reservoirs based on foam flooding

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Embodiment 1

[0061] Such as figure 1 As shown, the device for enhancing the recovery of thin-layer heavy oil reservoirs based on polymer foam flooding according to the present invention includes a polymer foam generating mechanism for generating polymer foams, and is used to simulate thin-layer heavy oil reservoirs. Sand-packed core simulation mechanism for cores, fluid injection mechanism for polymer foam generation mechanism and saturated fluid in sand-packed core simulation mechanism, production fluid collection for collecting fluid produced in sand-packed tube core simulation mechanism mechanism, and a temperature control mechanism for controlling the temperature of the polymer foam generating mechanism and the temperature of the sand-filled pipe core simulation mechanism; the polymer foam generating mechanism includes a peristaltic pump 11 and a foam generator 12 communicated with the output end of the peristaltic pump 11, so The sand-filling tube core simulation mechanism includes a ...

Embodiment 2

[0096] Such as image 3 As shown, the device for enhancing the recovery of thin-layer heavy oil reservoirs based on polymer foam flooding and jelly foam flooding in the present invention is different from Embodiment 1 in that it also includes a foam generator 12. The third pipeline 28 and the fifth intermediate container 23 that is installed on the third pipeline 28 for adorning jelly foaming liquid, the liquid inlet end of the fifth intermediate container 23 is provided with the third plunger pump 22, the fifth intermediate container 23 The liquid outlet of the liquid outlet is communicated with the input end of the foam generator 12, and the liquid outlet end of the fifth intermediate container 23 is equipped with a glue outlet valve 24, and one end of the fourth pipeline 29 is connected with the second pipeline 21 located at the input end of the peristaltic pump 11. The pipeline section is connected, and the other end of the fourth pipeline 29 communicates with the pipeline...

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Abstract

The invention discloses a device for improving the recovery rate of thin-bed heavy oil reservoirs based on polymer foam flooding. The invention also discloses a device for improving the recovery rate of thin-layer heavy oil reservoirs based on the combination of polymer foam flooding and jelly foam flooding. The invention also discloses a method for improving the recovery rate of the thin layer heavy oil reservoir based on polymer foam flooding. The invention discloses a method for improving the recovery rate of thin-bed heavy oil reservoirs based on the combination of polymer foam flooding and jelly foam flooding. The invention solves the problem that the foaming liquid easily enters the foam generator while the gas is difficult to enter during foam production, and at the same time solves the problem of low primary and secondary recovery of thin-layer heavy oil reservoirs and the inapplicability of thermal oil recovery through the cold oil recovery method It provides an important theoretical basis for the scientific use of foam flooding to enhance the recovery of thin-layer heavy oil reservoirs and its specific on-site construction.

Description

technical field [0001] The invention belongs to the technical field of improving the recovery of thin-layer heavy oil reservoirs, and in particular relates to a device and method for improving the recovery of thin-layer heavy oil reservoirs based on foam flooding. Background technique [0002] Heavy oil resources are widely distributed all over the world. Due to the high viscosity of crude oil in heavy oil reservoirs, it is necessary to use effective viscosity reduction technology for production. At present, the commonly used production technologies mainly include steam huff and puff, steam-assisted gravity flooding , steam flooding, fire oil layer method and other thermal oil recovery technologies. However, for thin heavy oil reservoirs (the effective thickness of the oil layer is less than 5m), the heat loss is very serious because the thickness of the oil layer is too thin, so the above-mentioned conventional thermal oil recovery methods are greatly limited, and it is imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/22E21B43/16C09K8/594
CPCC09K8/594E21B43/164E21B43/166
Inventor 周伟李荣西董明哲陈胜男
Owner CHANGAN UNIV
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