CN107060716B - Oil shale underground in-situ jet splitting construction device and construction process - Google Patents
Oil shale underground in-situ jet splitting construction device and construction process Download PDFInfo
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- CN107060716B CN107060716B CN201710445697.7A CN201710445697A CN107060716B CN 107060716 B CN107060716 B CN 107060716B CN 201710445697 A CN201710445697 A CN 201710445697A CN 107060716 B CN107060716 B CN 107060716B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/2405—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection in association with fracturing or crevice forming processes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
- E21B43/241—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection combined with solution mining of non-hydrocarbon minerals, e.g. solvent pyrolysis of oil shale
Abstract
The invention discloses an oil shale underground in-situ jetting splitting construction device and a construction process, wherein the oil shale underground in-situ jetting splitting construction device is adopted to perform high-pressure water or high-pressure air and high-pressure water rotating high-pressure jet jetting on underground in-situ oil shale, so that the oil shale is changed into small lumps, and favorable conditions are provided for cracking the oil shale. The process technology comprises the following steps: and (3) drilling from the earth surface to a bottom plate of an oil shale target layer by adopting a jet machine, starting jet-grouting splitting at the bottom plate, lifting the machine while jet-grouting splitting the oil shale layer until the jet-grouting splitting is performed on an upper top plate of the oil shale target layer, finishing the single-point jet-grouting splitting, and repeating splitting at a single point according to the splitting condition. And performing rotary spraying splitting of the next point until all the points of the designed point position are subjected to rotary spraying splitting. By adopting the method, the splitting points and the splitting ranges are mutually overlapped, so that the whole oil shale target layer is uniformly split into small blocks or powder, heat energy can permeate into the oil shale target layer, and the purpose of fully heating and splitting the oil shale is achieved.
Description
Technical Field
The invention relates to the field of shale oil exploitation, in particular to an oil shale underground in-situ jet splitting construction device and a construction process.
Background
The amount of shale oil resources in the world is about 4110 hundred million tons at present, which is equivalent to 3 times of the recoverable reserves of crude oil and condensate oil which are proved in the world at present, the amount of shale oil resources in China is about 476 hundred million tons, which is equivalent to 1.5 times of the amount of traditional oil resources, and the shale oil resources which are 27 hundred million tons at present are found out and only account for 5.67 percent of the shale oil resources at the fourth position in the world. Therefore, the shale oil resources in the world and China are rich, and the shale oil is the largest petroleum resource after the crude oil.
The dependence degree of China on imported petroleum in 2011 is 55.2%, and the dependence degree of the imported petroleum in 2020 is expected to reach 60%. At present, the strategic oil reserve days of developed countries such as Germany and France reach more than 90 days, the strategic oil reserve days of America and Japan reach more than 150 days, and the strategic oil reserve days of China only reach 30 days. Therefore, the import dependence on petroleum in China is high, the strategic petroleum reserve days are few, and the development of shale oil is urgent.
The importance of shale oil development is recognized all over the world, and national shale oil development plans are made in a dispute, so that a great amount of manpower, financial resources and material resources are invested in the shale oil development technology. But the technology is slowly developed and is not enough to support shale oil development. At present, shale oil development technology mainly aims at an integral heating mode of underground in-situ oil shale, so that shale oil is cracked and enters a production well, and then shale oil is pumped out. As the underground in-situ shale is integrally heated, the shale oil is difficult to crack, the time for the cracked shale oil to enter a production well is very long, the shale oil cannot be continuously exploited at all, the shale oil is just like water in a water well, the water can be drained within a few days after flowing into a year, and exploitation conditions and the scale for producing the shale oil cannot be formed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides an underground in-situ jet splitting construction device and a construction process for oil shale.
The technical scheme of the invention is as follows: the underground in-situ jetting and splitting construction device for the oil shale comprises a slurry device, a conveying device and a jetting device, wherein the slurry device is connected with the conveying device, and the conveying device is connected with the jetting device; the slurry device comprises a water tank, an additive solution tank, a stirrer and a slurry storage barrel, wherein the water tank and the additive solution tank are respectively connected with the stirrer through pipelines, and the stirrer is connected with the slurry storage barrel through a pipeline; the conveying device comprises a high-pressure grouting pump; the spraying device comprises a spraying machine tool, the spraying machine tool comprises a drilling machine and a drill rod connected with the drilling machine, a slurry channel for conveying split slurry is arranged in the drill rod, and the drill rod is provided with nozzles spirally arranged along the longitudinal direction of the drill rod; the slurry storage barrel is connected with a high-pressure grouting pump through a pipeline, and the high-pressure grouting pump is connected with a slurry channel arranged in the drill rod through a pipeline.
An oil shale underground in-situ jet splitting construction process comprises the following steps:
1) Preparing slurry: the splitting slurry additive and water are mixed in an additive solution tank according to the mass ratio of 1;
2) Carrying out underground in-situ micro-splitting drilling on the oil shale: namely, a jetting machine tool is adopted, drilling is carried out while low-pressure jetting is carried out, and a target layer bottom plate of the shale is drilled from the ground surface;
3) Adopting rotary jetting splitting to perform underground in-situ high-pressure splitting on the oil shale: starting high-pressure rotary jetting splitting at a bottom plate of an oil shale target layer, lifting a jetting tool while carrying out rotary jetting splitting on an oil shale layer until the oil shale layer is jetted to an upper top plate of the oil shale target layer, and finishing single-point rotary jetting splitting;
4) And (3) secondary splitting: repeating the step 2) and the step 3) until the target layer of the oil shale is split into blocks with the required size;
5) And then carrying out the next single-point rotary spraying splitting: repeating the step 2), the step 3) and the step 4);
6) The single-point splitting ranges are overlapped, so that the whole oil shale target layer in the mining area is uniformly split into small blocks or powder, heat energy in subsequent processes can permeate the small blocks or powder, and the purpose of fully heating and cracking the oil shale is achieved.
Preferably, the fracturing slurry additive is an oil shale electrolyte additive.
The invention has the beneficial effects that: the embodiment of the invention provides an underground in-situ jet splitting construction device and a construction process for oil shale, which can enable underground in-situ oil shale to comprehensively form powdery particles, provide conditions for comprehensive heating and splitting of the oil shale, realize underground in-situ fragmenting splitting of the oil shale through the technology of splitting and splitting the underground in-situ oil shale, and enable the underground in-situ oil shale to be fully split to form exploitable shale oil fluid. According to the invention, through underground in-situ crushing splitting of the oil shale, the underground in-situ oil shale comprehensively forms powdery particles, so that an environment is provided for full cracking of the oil shale, the exploitation cost of the oil shale is reduced, and the oil yield of the oil shale is improved.
Drawings
Fig. 1 is a schematic diagram of the oil shale underground in-situ injection splitting device and the process technology.
Fig. 2 is a schematic diagram of the underground in-situ jet splitting device for oil shale.
Detailed Description
An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.
Referring to fig. 1 and 2, an embodiment of the present invention provides an oil shale underground in-situ jet splitting construction device and a construction process, where the oil shale underground in-situ jet splitting construction device includes a slurry device, a conveying device and a jetting device, the slurry device is connected with the conveying device, and the conveying device is connected with the jetting device; the slurry device comprises a water tank 1, an additive solution tank 2, a stirrer 3 and a slurry storage barrel 4, wherein the water tank 1 and the additive solution tank 2 are respectively connected with the stirrer 3 through pipelines, and the stirrer 3 is connected with the slurry storage barrel 4 through a pipeline; the conveying device comprises a high-pressure grouting pump 5; the spraying device comprises a spraying machine tool, the spraying machine tool comprises a drilling machine 6 and a drill rod 7 connected with the drilling machine, a slurry channel for conveying split slurry is arranged in the drill rod 7, and nozzles which are spirally arranged along the longitudinal direction of the drill rod are arranged on the drill rod 7; the slurry storage barrel 4 is connected with a high-pressure grouting pump 5 through a pipeline, and the high-pressure grouting pump 5 is connected with a slurry channel arranged in the drill rod 7 through a pipeline.
The invention relates to an oil shale underground in-situ jet splitting construction process, which comprises the following steps:
1) Preparing slurry: the splitting slurry additive and water are mixed in an additive solution tank according to the mass ratio of 1 to 100 to form mixed slurry, the mixed slurry and the water in the water tank are stirred by a stirrer and flow into a slurry storage barrel for splitting slurry storage, and when a jet machine drills and splits, the splitting slurry is conveyed to a jet channel by a high-pressure grouting pump;
2) Carrying out underground in-situ micro-splitting drilling on the oil shale: namely, a jet machine is adopted, drilling is carried out while low-pressure jet is carried out, and a target layer bottom plate of the oil shale is drilled from the ground surface;
3) Adopting rotary jetting splitting to perform underground in-situ high-pressure splitting on the oil shale: starting high-pressure rotary jetting splitting at a bottom plate of an oil shale target layer, lifting a jetting tool while carrying out rotary jetting splitting on an oil shale layer until the oil shale layer is jetted to an upper top plate of the oil shale target layer, and finishing single-point rotary jetting splitting;
4) And (3) secondary splitting: repeating the step 2) and the step 3) until the target layer of the oil shale is split into blocks with the required size;
5) And then carrying out the next single-point rotary spraying splitting: repeating the step 2), the step 3) and the step 4);
6) The single-point splitting ranges are mutually overlapped, so that the whole oil shale target layer in the mining area is uniformly split into small blocks or powder, the heat energy in the subsequent process can permeate the small blocks or powder, and the purpose of fully heating and cracking the oil shale is achieved.
Further, the fracturing slurry additive is an oil shale electrolyte additive.
In summary, the invention adopts the oil shale underground in-situ injection splitting construction device to perform high-pressure air and high-pressure water rotation high-pressure jet injection on underground in-situ oil shale, so that the oil shale is changed into a small block shape, and favorable conditions are provided for splitting the oil shale. And performing rotary spraying splitting of the next point until all the points of the designed point position are subjected to rotary spraying splitting. The splitting points and the splitting ranges are mutually overlapped, so that the whole oil shale target layer is uniformly split into small blocks or powder, the heat energy is favorably permeated, the purpose of fully heating and splitting the oil shale is achieved, and the underground in-situ splitting of the oil shale is shown in the detailed figure 1.
Therefore, the construction device and the construction process for underground in-situ jet splitting of the oil shale provided by the embodiment of the invention can enable the underground in-situ oil shale to comprehensively form powdery particles, provide conditions for comprehensive heating and splitting of the oil shale, realize underground in-situ fragmenting splitting of the oil shale through the technology of splitting and splitting the underground in-situ oil shale, and enable the underground in-situ oil shale to be fully split to form the recoverable shale oil fluid. According to the invention, through underground in-situ crushing splitting of the oil shale, the underground in-situ oil shale comprehensively forms powdery particles, so that an environment is provided for full cracking of the oil shale, the exploitation cost of the oil shale is reduced, and the oil yield of the oil shale is improved.
The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (2)
1. The underground in-situ jetting and splitting construction process of the oil shale is characterized by comprising the following steps of:
1) Preparing slurry: the splitting slurry additive and water are mixed in an additive solution tank according to the mass ratio of 1 to 100 to form mixed slurry, the mixed slurry and the water in the water tank are stirred by a stirrer and flow into a slurry storage barrel for splitting slurry storage, and when a jet machine drills and splits, the splitting slurry is conveyed to a jet channel by a high-pressure grouting pump;
2) Carrying out underground in-situ micro-splitting drilling on the oil shale: namely, a jet machine is adopted, drilling is carried out while low-pressure jet is carried out, and a target layer bottom plate of the oil shale is drilled from the ground surface;
3) Adopting rotary jetting splitting to perform underground in-situ high-pressure splitting on the oil shale: starting high-pressure rotary jetting splitting at a bottom plate of an oil shale target layer, lifting a jetting tool while carrying out rotary jetting splitting on an oil shale layer until the oil shale layer is jetted to an upper top plate of the oil shale target layer, and finishing single-point rotary jetting splitting;
4) And (3) secondary splitting: repeating the step 2) and the step 3) until the target layer of the oil shale is split into blocks with the required size;
5) And then carrying out the next single-point rotary spraying splitting: repeating the step 2), the step 3) and the step 4);
6) The single-point splitting ranges are mutually overlapped, so that the whole oil shale target layer in the mining area is uniformly split into small blocks or powder, the heat energy in the subsequent process can permeate the small blocks or powder, and the purpose of fully heating and cracking the oil shale is achieved.
2. The underground in-situ jet fracturing construction process of oil shale according to claim 1, wherein the fracturing slurry additive is an oil shale electrolyte additive.
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| CN201710445697.7A CN107060716B (en) | 2017-06-14 | 2017-06-14 | Oil shale underground in-situ jet splitting construction device and construction process |
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| CN114017028B (en) * | 2021-10-25 | 2023-09-15 | 国能神东煤炭集团有限责任公司 | Rock stratum splitting equipment and roof rock stratum splitting method |
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