An online monitoring device and method for laser and supercritical water combined in-situ exploitation of shale oil

Abstract

The application discloses an online monitoring device and method for in-situ exploitation of shale oil by combining laser and supercritical water, which comprises a laser generating device, a gas generating device, a supercritical water generating device, a heating device and an online monitoring device, etc. The laser generating device generates a high-energy laser beam, the gas generating device generates active gas, the heating device makes the oil shale layer be heated and warmed underground, the online monitoring device on-line monitors the in-situ exploitation of shale oil, real-time observes the scene picture of the operation site, and the supercritical water injection device makes the generated supercritical water be injected into the oil shale layer and enter the pore throat. The high-energy laser beam acts on the active gas, the gas is activated, explosive thermochemical reaction occurs, the oil shale is broken and chemically modified, and finally the shale is rapidly broken. The method can avoid the environmental pollution caused by the shale oil in the ground refining process, has high economic benefits, can effectively reduce the production cost, improve the work efficiency and greatly improve the oil production rate.

Description

Technical Field

[0001] This invention belongs to the field of shale oil extraction technology, and relates to a shale oil extraction device and method, specifically to an online monitoring device and method for in-situ extraction of shale oil using a combination of laser and supercritical water. Background Technology

[0002] Shale oil refers to petroleum resources contained in source rock formations with ultra-low porosity and permeability, such as organic-rich shale and carbonate rocks with well-developed foliation and lamination. This includes petroleum in the pores and fractures of mudstone and shale, as well as petroleum resources in the dense carbonate rocks or clastic interlayers within mudstone and shale formations.

[0003] The United States extracts marine shale oil, which is highly mature, enabling in-situ underground extraction. This eliminates the need for ore extraction and transportation, as well as surface processing. The shale oil layer is heated and cracked in situ underground, and the crude oil is then transported to the surface through pipelines. China's continental shale oil, on the other hand, is primarily of medium to low maturity and cannot be directly extracted using existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide an online monitoring device and method for in-situ extraction of shale oil using a combination of laser and supercritical water technologies, which fully leverages the advantages of both laser and supercritical water technologies to achieve efficient and economical in-situ online monitoring and extraction of shale oil.

[0005] The technical solution adopted by the device of the present invention is as follows:

[0006] An online monitoring device for in-situ shale oil extraction using a combination of laser and supercritical water, characterized in that it comprises a shell and an inner part disposed within the shell.

[0007] Laser generator: used to output a high-energy laser beam;

[0008] Gas generating device: used to output reactive gas;

[0009] Supercritical water generator: Used to generate supercritical water and inject it into oil shale formations;

[0010] Set on the outer wall of the shell

[0011] Heating device: to heat the oil shale layer underground;

[0012] Online monitoring device: Monitors the real-time condition of the rock-breaking area.

[0013] In the aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, the laser generating device includes an energy optical fiber, as well as laser deflectors and laser heads disposed at both ends of the energy optical fiber.

[0014] In the aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, the gas generating device includes a gas channel for conveying active gas and a gas nozzle disposed at one end of the gas channel.

[0015] In the aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, the supercritical water generating device mainly consists of a supercritical water generator and a supercritical water nozzle installed at the front end of the supercritical water generator.

[0016] In the aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, the heating device is primarily an electric heating tool.

[0017] The aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water includes a lighting lamp, a pressure sensor, a temperature sensor, a gas sensor, and a miniature camera mounted on the outer casing.

[0018] In the aforementioned online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, the laser is a femtosecond laser, picosecond laser, or nanolaser, and its energy output is controllable.

[0019] An online monitoring method for in-situ extraction of shale oil using a combination of laser and supercritical water, characterized by:

[0020] Supercritical water is injected into the oil shale layer, enters the pore throat, further expands the pore throat, and dissolves the mineral components in the oil shale layer;

[0021] Electric heating tools heat the oil shale layer underground, modifying the organic matter and creating conditions for the conversion of solid organic matter into liquid petroleum.

[0022] The high-energy laser beam generated by the laser has controllable energy and reaches the laser diverter through the energy fiber. After being focused by the laser head, the high-energy laser beam is output and acts on the active gas, activating the gas and causing an explosive thermochemical reaction. This causes the oil shale to break up and chemically modify, enabling in-situ extraction of shale oil.

[0023] Throughout the entire in-situ shale oil extraction process, lighting provides a light source for miniature cameras, pressure sensors monitor pressure changes in the rock-breaking area, temperature sensors monitor the temperature in the rock-breaking area, and gas sensors monitor gas changes in the rock-breaking area, providing real-time feedback of operational data and online monitoring of the in-situ shale oil extraction status.

[0024] This invention proposes a novel in-situ extraction method for shale oil using a combination of laser and supercritical water. It fully utilizes the advantages of both methods, by using laser to act on active gas to induce an explosive chemical reaction in the rock-breaking area, combined with the injection of supercritical water into the oil shale layer to expand the pore throats of the oil shale, thereby achieving the goal of rapid and large-area fracturing of the shale layer and realizing high-efficiency in-situ extraction of shale oil. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the apparatus according to an embodiment of the present invention.

[0026] Figure 2 This is a cross-sectional view of the device.

[0027] Figure 3 This is the left view of the device.

[0028] Figure 4 This is the right view of the device. Detailed Implementation

[0029] To facilitate understanding and implementation of the present invention by those skilled in the art, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4This invention provides an online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water. The device includes an oil shale layer 1, an electric heating tool 2, a miniature camera 3, a circulator 4, a lighting lamp 5, a temperature sensor 6, a pressure sensor 7, a gas sensor 8, a laser diverter 9, an energy fiber optic cable 10, an active gas 11, a laser head 12, a supercritical water nozzle 13, a supercritical water generator 14, and a gas nozzle 15. The electric heating tool 2 heats the oil shale layer 1 underground, modifying the organic matter and creating conditions for the conversion of solid organic matter into liquid petroleum. Supercritical water, after passing through the supercritical water generator 14, is finally injected into the oil shale layer through the supercritical water nozzle 13. Entering the pore throat, it further expands the pore throat, dissolving the mineral components in the oil shale layer, modifying the shale, and creating favorable conditions for shale oil flow. A high-energy laser beam with controllable energy generated by the laser reaches the laser deflector 9 via the energy fiber 10. After being focused by the laser head 12, the high-energy laser beam acts on the active gas ejected from the gas nozzle 15, activating the gas and causing an explosive thermochemical reaction in the rock-breaking area. This results in the crushing and chemical modification of the oil shale, enabling in-situ extraction of shale oil. Throughout the in-situ shale oil extraction process, the lighting lamp 5 provides a light source for the miniature camera 3, allowing ground personnel to observe real-time images of shale layer crushing and extraction. The pressure sensor 7 monitors pressure changes in the rock-breaking area, the temperature sensor 6 monitors temperature changes in the rock-breaking area, and the gas sensor 8 monitors gas changes in the rock-breaking area. The sensors provide real-time feedback of operational data, allowing ground personnel to adjust various processing parameters promptly based on the feedback data, achieving high-speed rock breaking and efficient in-situ shale oil extraction.

[0031] The laser output energy of this invention is controllable, and the laser output energy can be adjusted in real time according to the monitoring of miniature cameras and sensors, so as to further precisely control the shale oil extraction process.

[0032] The active gas ejected by the gas nozzle 15 of the present invention is a neutral active gas, which does not pollute the atmospheric environment.

[0033] This invention fully utilizes the advantages of both laser and supercritical water methods. Supercritical water is injected into oil shale layer 1 to expand the pore throats of the oil shale, dissolving the mineral components within the rock layer. Combined with an electrically heated tool 2, the oil shale layer 1 is heated and its quality is modified. Laser action on reactive gases triggers an explosive chemical reaction in the rock-breaking area, resulting in physical fracturing and chemical modification of the oil shale layer 1, achieving rapid and large-area fracturing of the shale layer. The high temperature and high pressure environment, along with the reactivity of supercritical water, drives the conversion of organic matter into liquid petroleum, significantly improving the efficiency of in-situ shale oil extraction.

[0034] It should be understood that any parts not described in detail in this specification belong to the prior art.

[0035] It should be understood that the above description of the preferred embodiments is quite detailed, but it should not be considered as a limitation on the scope of protection of this invention. Those skilled in the art can make substitutions and modifications under the guidance of this invention without departing from the scope of the claims of this invention, and these modifications should still be covered by the claims of this invention.

Claims

1. An online monitoring method for in-situ extraction of shale oil using a combination of laser and supercritical water, comprising an online monitoring device for in-situ extraction of shale oil using a combination of laser and supercritical water, characterized in that: The online monitoring device includes a housing and a component disposed within the housing. Laser generating device: used to output a high-energy laser beam; the laser generating device includes an energy fiber, and laser deflectors and laser heads disposed at both ends of the energy fiber; Gas generating device: used to output reactive gas; Supercritical water generator: Used to generate supercritical water and inject it into oil shale formations; Set on the outer wall of the shell Heating device: to heat the oil shale layer underground; the heating device mainly includes electric heating tools; Online monitoring device: Monitors the real-time condition of the rock-breaking area; The online monitoring device includes a light source, a pressure sensor, a temperature sensor, a gas sensor, and a miniature camera mounted on the housing; The online monitoring method includes: Supercritical water is injected into the oil shale layer, enters the pore throat, further expands the pore throat, and dissolves the mineral components in the oil shale layer; Electric heating tools heat the oil shale layer underground, modifying the organic matter and creating conditions for the conversion of solid organic matter into liquid petroleum. The high-energy laser beam generated by the laser has controllable energy and reaches the laser diverter through the energy fiber. After being focused by the laser head, the high-energy laser beam is output and acts on the active gas, activating the gas and causing an explosive thermochemical reaction. This causes the oil shale to break up and chemically modify, enabling in-situ extraction of shale oil. Throughout the entire in-situ shale oil extraction process, lighting provides a light source for miniature cameras, pressure sensors monitor pressure changes in the rock-breaking area, temperature sensors monitor the temperature in the rock-breaking area, and gas sensors monitor gas changes in the rock-breaking area, providing real-time feedback of operational data and online monitoring of the in-situ shale oil extraction status.

2. The online monitoring method for in-situ extraction of shale oil using a combination of laser and supercritical water as described in claim 1, characterized in that: The gas generating device includes a gas channel for conveying active gas and a gas nozzle disposed at one end of the gas channel.

3. The online monitoring method for in-situ extraction of shale oil using a combination of laser and supercritical water as described in claim 1, characterized in that: The supercritical water generating device mainly includes a supercritical water generator and a supercritical water nozzle installed at the front end of the supercritical water generator.

4. The online monitoring method for in-situ extraction of shale oil using a combination of laser and supercritical water as described in claim 1, characterized in that: The laser is a femtosecond laser, picosecond laser, or nanolaser, and its energy output is controllable.

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