Depleted and shut-down oilfield, super heavy oil, shale oil, extra-heavy oil and oil shale injection supercritical superheated steam hydrogen producing method
A technology of superheated steam and shale oil, applied in the field of hydrogen production from oil, can solve the problems of difficulty in exploitation, waste of resources, and difficulty in utilization, etc.
Active Publication Date: 2019-12-03
邓惠荣
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Problems solved by technology
[0002] At present, a large amount of crude oil, ultra-heavy oil, oil shale, and shale oil trapped in the formation are difficult to exploit and utilize, resulting in a serious waste of resources
[0003] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior art: abandoned and out-of-production oil fields, super heavy oil, shale oil, oil shale, etc. are difficult to exploit, resulting in serious waste of resources
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[0048] (1) Optimizing the work area and selecting suitable oil layers: mainly select oil layers that cannot be exploited, such as viscosity value> 3000mps, density> 0.
[0049] 92g / cm3, gum content> 35%, etc., can be fire flooding, steam huff and puff, air flooding, residual oil layer after mining.
[0050] (2) Reasonable well pattern selection:
[0051] Within a reasonable range, select gas injection wells and gas production wells, and select perforated oil layers below the oil wells as the layers for steam and high-pressure air injection.
[0052] The five-point well pattern is adopted, and the gas production wells and gas injection wells are arranged alternately. The square is composed of 4 adjacent gas production wells. The center is a gas injection well, and the gas injection well is the main well ( figure 1 ) Arrange the well pattern according to the well layout. After selecting the construction well, widen the section of the gas well corresponding to the reaction oil-bearing lay...
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The embodiment of the invention provides a depleted and shut-down oilfield, super heavy oil, shale oil, extra-heavy oil and oil shale injection supercritical superheated steam hydrogen producing method. The depleted and shut-down oilfield, super heavy oil, shale oil, extra-heavy oil and oil shale injection supercritical superheated steam hydrogen producing method comprises the steps of injecting superheated steam to the shaft bottom through a gas injection well; using an air compressor to inject high pressure air or oxygen-rich air to the shaft bottom through the gas injection well, wherein the temperature and pressure of the superheated steam reach a supercritical state of the water so that cracking reaction is carried out on hydrocarbons in petroleum to produce hydrogen, the supercritical state of the water is that the temperature is higher than 374.15 degrees centigrade, and the pressure is higher than 22.13 MPa; by detecting contents of carbon dioxide, hydrogen and oxygen in gas exhausted from the shaft bottom, judging whether the hydrogen is extracted; and if the content of the carbon dioxide rises, the content of the hydrogen rises and the content of the oxygen descends in the exhausted gas, regarding as that the hydrogen is extracted.
Description
Technical field [0001] The invention relates to a method for producing hydrogen from oil, in particular to a method for producing hydrogen by injecting supercritical superheated steam into abandoned and suspended oil fields, ultra-heavy oil, shale oil, extra-heavy oil, and oil shale. Background technique [0002] At present, the large amount of crude oil, ultra-heavy oil, oil shale, and shale oil remaining in the stratum are difficult to exploit and difficult to use, resulting in a serious waste of resources. [0003] In the process of realizing the present invention, the inventor found that at least the following problems exist in the prior art: abandoned and suspended oil fields, ultra-heavy oil, shale oil, oil shale, etc. are difficult to exploit, causing serious waste of resources. Summary of the invention [0004] The embodiment of the present invention provides a method for producing hydrogen by supercritical superheated steam injection in abandoned and suspended oil fields, u...
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IPC IPC(8): E21B43/241E21B43/16
CPCE21B43/241E21B43/168
Inventor 邓惠荣
Owner 邓惠荣