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Zero emission steam generation process

A steam generator and steam technology, applied in steam generation method, steam generation, earthwork drilling and other directions, can solve the problems of reducing in-situ reservoir temperature and oil recovery rate, etc.

Inactive Publication Date: 2013-11-20
CLEAN ENERGY SYST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Traditionally, the heating / cooling process takes place in heat exchanger vessels and equipment, which have a common deficiency: all those vessels and equipment used in all industries maintain a separation between the reacting species and the object being heated or cooled
But in thermal oil recovery, free gas in the reservoir can reduce the in situ reservoir temperature, which in turn can reduce oil recovery

Method used

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no. 4 approach

[0085] A fourth embodiment of the present invention, allows the use of heavier fuels such as distillate or heavy fuel oil to produce larger fractions of carbon dioxide as high as 35%. In this embodiment, the mass fraction of carbon dioxide is adjusted as a parameter of the reservoir and oil to maximize recovery.

no. 5 approach

[0086] A fifth embodiment of the present invention allows for the addition of lighter hydrocarbons or other compounds to the steam carbon dioxide stream downstream of the steam separator to act as additional solvent for use in hydrocarbon recovery.

[0087] The sixth embodiment of the present invention allows the partial oxidation of fuels, which together with pyrolysis and hydrothermolysis can produce a synthesis gas composed of water, hydrogen, carbon dioxide, and carbon monoxide. The syngas can be injected into oil formations to enable oil recovery and partial upgrading if the injected gas is at a temperature sufficient to enable subterranean gasification of oil (typically above about 300°C).

[0088] A further benefit of injecting water with traces of oil and impurities into the oxyfuel steam generator is the use of those impurities as fuel during the combustion process. In this case, the impurities are incinerated and additional thermal energy is provided for steam genera...

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Abstract

This invention provides a new process to generate steam directly from untreated water produced simultaneously with thermally recovered crude oil, and to inject the steam and combustion products into a hydrocarbon reservoir to recover hydrocarbons and to sequester a portion of the carbon dioxide produced during the creation of steam. The invention removes the ongoing additional water requirements for thermal oil recovery and the need for surface treating of produced water for re-use, yielding improved process efficiencies, reduced environmental impact, and improved economic value.

Description

technical field [0001] The present invention is in the field of generating steam for thermal oil and bitumen recovery from subterranean hydrocarbon reservoirs. In particular, the invention belongs to the field of using oxy-fuel combustors as steam generators. Background technique [0002] Thermal oil recovery projects include, but are not limited to, steam assisted gravity drainage (SAGD), steam stimulation (CSS), or steam flooding or recovery methods potentially initiated with steam injection (e.g., in-situ combustion), utilizing large amounts of steam Water in the form of water to carry subsurface heat to migrate oil, heavy oil or bitumen. This water is transported back to the surface along with the oil, typically in a ratio of three or more parts water to one part oil. The preceding methods require extensive water treatment and control to keep the water clean before it can be reused as boiler feed water. For example, water treatment may include one or more of gravity s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/24E21B36/00F22B3/00
CPCF22B1/1853Y02E20/34
Inventor G·L·布尼奥I·D·盖茨P·苏德洛R·E·安德森M·E·普罗浦
Owner CLEAN ENERGY SYST
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