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Process for producing oil

A technology for oil recovery and residual oil, which can be used in chemical instruments and methods, earthwork drilling, drilling composition, etc., and can solve problems such as difficulty in oil recovery

Inactive Publication Date: 2015-08-26
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These deposits offer the opportunity to obtain large quantities of oil, however, the nature of heavy oil or bitumen makes recovery of the oil difficult

Method used

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  • Process for producing oil
  • Process for producing oil
  • Process for producing oil

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Embodiment Construction

[0019] The present invention relates to a method of enhancing oil recovery from subterranean formations containing heavy oil or bitumen. An oil recovery formulation comprising ammonia and low quality steam (particularly steam with a mass gas fraction less than 0.7) can be injected into a formation from which oil can be produced after injecting the oil recovery formulation into the formation. The combination of ammonia and low quality steam in the oil recovery formulation produces ammonium hydroxide in the liquid phase aqueous condensate portion of the low quality steam, so that ammonium hydroxide is present in the oil recovery formulation when the oil recovery formulation is injected into the formation. preparation. Ammonium hydroxide can react with petroleum acids (such as naphthenic acid) in bitumen or heavy oil in the immediate vicinity of injection wells to form oil emulsifying soaps that promote the formation of oil-in-water emulsions with condensed water from steam, Whe...

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Abstract

Heavy oil or bitumen is recovered by injecting an oil recovery formulation comprising ammonia and steam having a vapor quality of from greater than 0 to less than 0.7, or injecting components thereof, into an underground oil-bearing formation comprising oil or bitumen having a total acid number of at least 0.1 and producing oil or bitumen from the formation after injection of the oil recovery formulation, or components thereof, into the formation.

Description

technical field [0001] The present invention relates to a method for producing oil. In particular, the invention relates to a method for producing heavy oil or bitumen with a measurable total acid number. Background technique [0002] Large deposits of heavy oil or bitumen exist in some regions of the world. These deposits offer the opportunity to obtain large quantities of oil, however, the nature of heavy oil or bitumen makes recovery of the oil difficult. Heavy oil and bitumen contain more high molecular weight hydrocarbons such as asphaltenes and resins than light crude oil, which makes heavy oil / bitumen more viscous than light crude oil. Viscous heavy or bituminous crudes are more difficult to mobilize and produce from subterranean formations than low viscosity crudes because viscous crudes do not flow easily. [0003] Heating has been used to enhance oil production from subterranean formations containing heavy oil and bitumen. The heat applied to the heavy oil or b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/17E21B43/12E21B43/20
CPCE21B43/2406C09K8/592
Inventor G·A·奇雷克G·T·沙因S·舒克拉
Owner SHELL INT RES MAATSCHAPPIJ BV
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