CN112112619A - Shale gas underground rock stratum hydraulic fracturing method and equipment thereof - Google Patents
Shale gas underground rock stratum hydraulic fracturing method and equipment thereof Download PDFInfo
- Publication number
- CN112112619A CN112112619A CN202010972090.6A CN202010972090A CN112112619A CN 112112619 A CN112112619 A CN 112112619A CN 202010972090 A CN202010972090 A CN 202010972090A CN 112112619 A CN112112619 A CN 112112619A
- Authority
- CN
- China
- Prior art keywords
- oil
- stratum
- formation
- hydraulic fracturing
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000011435 rock Substances 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 32
- 239000003129 oil well Substances 0.000 claims abstract description 21
- 238000005553 drilling Methods 0.000 claims abstract description 17
- 230000035699 permeability Effects 0.000 claims abstract description 13
- 238000010276 construction Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 72
- 208000010392 Bone Fractures Diseases 0.000 claims description 31
- 239000012530 fluid Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 229910052787 antimony Inorganic materials 0.000 claims description 5
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- 229930195733 hydrocarbon Natural products 0.000 claims description 5
- 150000002430 hydrocarbons Chemical class 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 150000003839 salts Chemical class 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 4
- 208000003044 Closed Fractures Diseases 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000004215 Carbon black (E152) Substances 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract description 2
- 238000005755 formation reaction Methods 0.000 description 52
- 238000005086 pumping Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 4
- 239000000654 additive Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000013341 scale-up Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a hydraulic fracturing method and equipment for a shale gas underground rock stratum, wherein the method comprises the following steps: s1, carrying out first hydraulic fracturing drilling on the stratum, forming a plurality of oil and gas producing cracks in the stratum, forming the stratum under a first oil producing condition, and starting oil and gas production; s2, establishing an oil well bore pre-monitoring system; s3, monitoring the oil gas yield in the stratum by using an oil shaft pre-monitoring system for pre-monitoring, taking the pressure, the oil gas yield and the temperature of the stratum under the first oil production condition as indexes for pre-monitoring the characteristics of the oil shaft, and if the oil production of the oil shaft is reduced and the oil shaft pressure is reduced, continuing to perform second hydraulic fracturing construction on the stratum to form the stratum under the second oil production condition. The invention effectively solves the problems of low stratum permeability, easy crack closure, high exploitation cost, low efficiency, low oil well yield and the like in the oil extraction process, greatly improves the working efficiency and the yield, reduces the production cost, and has important application prospect and practical significance.
Description
Technical Field
The invention relates to a method for exploiting shale gas from a low-permeability reservoir, in particular to a hydraulic fracturing method for a rock stratum under a shale gas well and equipment thereof.
Background
The shale gas development industry in China develops rapidly, but shale gas is stored in low-permeability and ultra-low-permeability formations, and new cracks need to be created in underground formations or existing cracks need to be expanded so as to establish a flow path for conveying oil and gas to a shaft. However, current shale gas mining is extremely difficult and difficult to scale up for commercial exploitation.
In a gas-producing formation, in order to form new fractures, or to extend and connect existing fractures, it is necessary to inject hydraulic fracturing fluid through the wellbore into the subterranean formation at sufficient velocity and pressure to effect stimulation. The rate of injection of the fracturing fluid into the formation exceeds the filtration rate of the formation, thereby increasing the hydraulic pressure of the sand face. When the pressure exceeds the formation fracture pressure, the formation rock fractures and fissures. After the hydraulic fracturing stage is completed, the proppant may flow downhole within the wellbore and settle out. As hydrocarbons are produced from fractured formations, the pressure in the well decreases. In compressible formations, a decrease in pressure increases the force that promotes fracture closure. After continuous production, the proppant may not be sufficient to counteract the force that promotes fracture closure. Increasing the compressive force may reduce porosity and permeability and result in natural microcracking and fracture closure.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a shale gas underground rock stratum hydraulic fracturing method and equipment thereof. The method can be used for exploiting the shale gas in the low-permeability area, is simple and reasonable, is convenient to operate and use, can solve the problems of low stratum permeability, easy crack closure, high exploitation cost, low efficiency, low oil well yield and the like in the oil exploitation process, greatly improves the working efficiency and yield of exploiting the shale gas, reduces the cost, and has important application prospect and practical significance.
The invention relates to a hydraulic fracturing method for a shale gas underground rock stratum, which comprises the following steps:
s1: carrying out first hydraulic fracturing drilling on the stratum to form a plurality of oil and gas producing cracks in the stratum to form the stratum under a first oil producing condition, and starting oil and gas exploitation;
s2: establishing an oil well shaft pre-monitoring system for monitoring oil production and formation temperature;
s3: the oil-gas yield in the stratum is monitored by using an oil shaft pre-monitoring system for pre-monitoring, the pressure, the oil-gas yield and the temperature of the stratum under the first oil production condition are used as indexes for pre-monitoring the characteristics of the oil shaft, and if the oil production of the oil shaft is reduced and the pressure of the oil shaft is reduced, the second hydraulic fracturing construction is continuously carried out on the stratum to form the stratum under the second oil production condition.
Preferably, the formation is a shale formation.
As a preferred technical scheme, the oil gas is shale gas.
Preferably, in step S1, drilling the formation with a drilling machine, pumping a fluid through a pump body to form an initial fracture, filling a proppant into the initial fracture, maintaining the size of the initial fracture, and allowing the oil and gas to be transferred to a conduit through the fracture and transported to the surface to form the formation under the first oil production condition, and starting oil production.
As a preferable technical solution, the second hydraulic fracturing construction in the step S3 includes the following steps:
the pump is restarted to perform hydraulic fracturing construction, the liquid injected into the well bore is kept under the condition of constant pressure for at least 3 hours, and the partially or completely closed fracture influenced by the hydraulic force can be partially or completely reopened or extended due to the increase of the formation pressure.
As a preferable technical scheme, the liquid for hydraulic fracturing comprises water, boric acid, titanium metal salt, antimony and aluminum oxide.
As a preferred technical scheme, the proportion of water, boric acid, titanium metal salt, antimony and alumina is 92-95: 2-5: 3-6: 1-4: 4 to 7.
The invention also provides a hydraulic fracturing device for the shale gas underground rock stratum, which comprises a fracturing drilling mechanism and an oil well cylinder pre-monitoring system;
the frac drilling mechanism includes a wellbore extending through a surface of the subterranean formation and into the subterranean formation, the wellbore employing a cased hole with a casing disposed within the wellbore; the casing including a wellbore fluid passageway for conducting fluids into and out of fractures in the subterranean formation, the wellhead being connected to and sealed from the wellbore at the surface of the subterranean formation, the wellhead including valves and conduits for conducting and controlling fluids into and out of the wellbore; the well bore fluid channel, the hydraulic fracture and the casing form a closed oil-production gas well in the stratum, and a fracture port is opened or closed by sliding the casing up and down to determine the starting or stopping of oil-gas production; the pipe body of the casing is provided with at least one small hole, water in the pump is injected into the shaft from the well mouth and is led into the stratum through the fluid channel, and the larger water pressure is applied to the stratum through the small hole of the pipe body, so that the crack is further expanded;
the oil well bore pre-monitoring system is used for monitoring the changes of yield, temperature and pressure in an oil well, and when the hydraulic pressure construction needs to be carried out again, the pump is started again, cracks are opened again, and the number of the cracks is increased.
Preferably, the hydraulic fracture is formed by perforating the formation with a hydraulic perforating gun in the casing, and the hydraulic perforating gun is generated by pumping fluid downhole.
As a preferred technical scheme, the matrix permeability of the stratum is less than 0.1 mm.
Has the advantages that:
the method effectively solves the problems of low stratum permeability, easy crack closure, high exploitation cost, low efficiency, low oil well yield and the like in the oil exploitation process, greatly improves the working efficiency and yield of exploiting shale gas, reduces the production cost, and has important application prospect and practical significance.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic illustration of a shale gas downhole formation hydraulic fracturing method in an embodiment of the present disclosure.
Wherein, 1 is a well mouth, 2 is a casing, 3 is a well hole, 4 is a hydraulic fracture, 5a and 5b are small holes of a pipe body, 6 is a casing sliding groove, 7 is a pump, 8 is a surface of a stratum, 9 is the stratum, 10 is a natural fracture, 11 is a shaft fluid channel, 21 is a valve, and 31 is a conduit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention will now be further described with reference to the accompanying drawings.
The shale gas downhole rock stratum hydraulic fracturing method comprises the following steps:
1. carrying out first hydraulic fracturing drilling on the stratum through a drilling machine well, forming a large amount of oil and gas cracks in the stratum, forming the stratum under a first oil production condition, and starting oil and gas exploitation;
2. an oil well shaft pre-monitoring system is established, and oil production and formation temperature can be monitored;
3. and monitoring the oil and gas yield in the stratum by using an oil well shaft pre-monitoring system for pre-monitoring. And if the oil yield of the oil well barrel is reduced and the pressure of the oil well is reduced, continuing performing second hydraulic fracturing construction on the stratum to form the stratum under the secondary oil production condition.
In an embodiment of the invention, the formation is a shale formation.
According to the embodiment of the invention, the oil gas is shale gas.
The drilling machine is used for drilling a stratum, pumping a water body through a pump, forming an initial fracture according to the principle of hydraulic fracturing, filling a propping agent into the fracture, keeping the size of the fracture, transmitting oil gas to a guide pipe through the fracture, transporting the oil gas to the ground, forming the stratum under the first oil production condition, and starting oil production.
The oil and gas cylinder pre-monitoring system detects indexes such as oil well pressure, oil and gas yield, formation temperature and the like. During oil production, the generated fractures are gradually closed by surrounding rock pressure, and the number of the fractures is reduced and the width of the fractures is narrowed along with the reduction of the formation pressure, so that the oil and gas production is reduced.
The pump is started again to perform hydraulic fracturing construction, the liquid injected into the well bore is kept under the condition of constant pressure for at least 3 hours, and the partially or completely closed fracture influenced by the hydraulic force can be partially or completely reopened and even extended due to the increase of the formation pressure. If the hydraulic pressure continues to increase and exceeds the fracture pressure, additional hydraulic fractures are formed, more oil gas is released, and the oil production of the stratum is greatly improved.
The water body for hydraulic fracturing comprises additives such as water, boric acid, titanium metal salt, antimony, alumina and the like, and the additives can reduce friction and viscosity and increase the easy activity and volatility of oil gas.
Specifically, referring to FIG. 1, a wellbore 3 extends through a surface 8 of a subterranean formation and into the subterranean formation 9. The subsurface formations 9 may represent land formations or marine formations. The subterranean zone 9 contains a plurality of formation formations 10 and can be subjected to hydraulic pressure.
The shaft 3 can be a straight cylinder, a bent cylinder or other cylinder; the material of the shaft can be made of any material; the axial length of the shaft is set according to requirements.
The wellbore 3 employs a cased hole, wherein the casing 2 is disposed within the wellbore 3. The casing 3 includes a wellbore fluid passageway 11 for conducting fluids into and out of the fracture 10 of the subterranean formation 9.
The permeability properties in the region of at least one natural fracture 10 of the formation 9 are low permeability or ultra-low permeability, such as a tight sand reservoir, a tight sand gas reservoir, an oil-rich shale reservoir, or a gas-rich shale. The formation has a matrix permeability of less than 0.1 mm. For example, the permeability of a tight sand reservoir may be between 0.1 and 0.001 millimeters; the shale reservoir permeability can reach 0.001 to 0.0001 mm.
The wellhead 1 is connected to a wellbore 3 at a surface 8 of the formation and is sealed from the wellbore 3. The wellhead 1 includes a valve 21 and a conduit 31 for directing and controlling the flow of fluids into and out of the wellbore 3.
The wellbore fluid passage 11, hydraulic fracture 4 and casing 2 form a closed oil and gas production well in the formation 9, and the fracture ports can be opened or closed by sliding the casing 2 up and down. Determining the start or stop of hydrocarbon production.
The casing 2 has body apertures 5a, 5b and hydraulic fractures 4 are formed by perforating the formation 9 with an in-casing hydraulic perforating gun that is produced by pumping fluid downhole.
The perforating gun is deployed downhole, such as by wireline. In this regard, when the port or opening 24 is a perforating gun deployed downhole by a wireline, such as by means of fluid pumping.
The formation is stimulated by hydraulic fracturing to increase the production of hydrocarbons from the formation 9. Water in the pump 7 is injected into the wellbore 3 from the inlet 1, introduced into the formation 9 through the fluid passage 11, and given greater water pressure to the formation 9 through the body apertures 5a, 5b, thereby causing the fracture 4 to further enlarge.
The formation pressure gradually increases as the water is continuously injected into the formation 9, and when the pressure in the formation 9 is greater than the limit bearing capacity of the fracture 4, the fracture 4 will further increase, and then the pumping of water is stopped. With the pump 7 stopping injecting water, the water will flow back to the surface and take away the oil and gas in the stratum 9. A formation is formed in a first producing condition and production of hydrocarbons is initiated.
As the oil gas is pumped away, the pressure in the formation 9 is reduced, the volume of the fractures 4 is gradually reduced and even closed, at the moment, the oil well bore pre-monitoring system 12 monitors the changes of yield, temperature and pressure in the oil well, and if the hydraulic pressure construction needs to be carried out again, the pump 7 is restarted, the operations are repeated again, the fractures 4 are reopened, and the number of the fractures 4 is increased, so that the oil gas yield is improved.
In summary, the shale gas downhole formation hydraulic fracturing method comprises the following steps: carrying out first hydraulic fracturing drilling on a stratum through a drilling machine well, forming a large amount of oil and gas cracks in the stratum, forming the stratum under a first oil production condition, and starting oil and gas exploitation; establishing an oil well shaft pre-monitoring system, and monitoring the oil production and the formation temperature; and thirdly, monitoring the oil gas yield in the stratum by using an oil shaft pre-monitoring system for pre-monitoring.
The advantages mainly lie in: the problems of low stratum permeability, easy crack closure, high exploitation cost, low efficiency, low oil well yield and the like in the oil extraction process are solved, the working efficiency and yield of exploiting shale gas can be greatly improved, and the cost is reduced.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A hydraulic fracturing method for a shale gas underground rock stratum is characterized by comprising the following steps: the method comprises the following steps:
s1: carrying out first hydraulic fracturing drilling on the stratum to form a plurality of oil and gas producing cracks in the stratum to form the stratum under a first oil producing condition, and starting oil and gas exploitation;
s2: establishing an oil well shaft pre-monitoring system for monitoring oil production and formation temperature;
s3: the oil-gas yield in the stratum is monitored by using an oil shaft pre-monitoring system for pre-monitoring, the pressure, the oil-gas yield and the temperature of the stratum under the first oil production condition are used as indexes for pre-monitoring the characteristics of the oil shaft, and if the oil production of the oil shaft is reduced and the pressure of the oil shaft is reduced, the second hydraulic fracturing construction is continuously carried out on the stratum to form the stratum under the second oil production condition.
2. The shale gas downhole formation hydraulic fracturing method of claim 1, wherein: the formation is a shale formation.
3. The shale gas downhole formation hydraulic fracturing method of claim 1, wherein: the hydrocarbon gas is shale gas.
4. The shale gas downhole formation hydraulic fracturing method of claim 1, wherein: in step S1, drilling the formation with a drilling machine, delivering liquid through a pump body to form an initial fracture, filling proppant into the initial fracture, and maintaining the size of the initial fracture, so that the oil and gas are transmitted to a conduit through the fracture and transported to the ground, thereby forming a formation under a first oil production condition, and starting oil production.
5. The shale gas downhole formation hydraulic fracturing method of claim 4, wherein: the second hydraulic fracturing construction in the step S3 comprises the following steps:
the pump is restarted to perform hydraulic fracturing construction, the liquid injected into the well bore is kept under the condition of constant pressure for at least 3 hours, and the partially or completely closed fracture influenced by the hydraulic force can be partially or completely reopened or extended due to the increase of the formation pressure.
6. The shale gas downhole formation hydraulic fracturing method of claim 4, wherein: the liquid for hydraulic fracturing comprises water, boric acid, titanium metal salt, antimony and aluminum oxide.
7. The shale gas downhole formation hydraulic fracturing method of claim 6, wherein: wherein the proportion of water, boric acid, titanium metal salt, antimony and alumina is 92-95: 2-5: 3-6: 1-4: 4 to 7.
8. The utility model provides a shale gas is rock stratum hydraulic fracturing equipment in pit which characterized in that: the device comprises a fracturing drilling mechanism and an oil well barrel pre-monitoring system;
the frac drilling mechanism includes a wellbore extending through a surface of the subterranean formation and into the subterranean formation, the wellbore employing a cased hole with a casing disposed within the wellbore; the casing including a wellbore fluid passageway for conducting fluids into and out of fractures in the subterranean formation, the wellhead being connected to and sealed from the wellbore at the surface of the subterranean formation, the wellhead including valves and conduits for conducting and controlling fluids into and out of the wellbore; the well bore fluid channel, the hydraulic fracture and the casing form a closed oil-production gas well in the stratum, and a fracture port is opened or closed by sliding the casing up and down to determine the starting or stopping of oil-gas production; the pipe body of the casing is provided with at least one small hole, water in the pump is injected into the shaft from the well mouth and is led into the stratum through the fluid channel, and the larger water pressure is applied to the stratum through the small hole of the pipe body, so that the crack is further expanded;
the oil well bore pre-monitoring system is used for monitoring the changes of yield, temperature and pressure in an oil well, and when the hydraulic pressure construction needs to be carried out again, the pump is started again, cracks are opened again, and the number of the cracks is increased.
9. The shale gas downhole formation hydraulic fracturing apparatus of claim 8, wherein: hydraulic fractures are created by perforating a formation with a hydraulic perforating gun in a casing, which is pumped downhole by a fluid to create the hydraulic perforating gun.
10. The shale gas downhole formation hydraulic fracturing apparatus of claim 8, wherein: the formation has a matrix permeability of less than 0.1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972090.6A CN112112619A (en) | 2020-09-16 | 2020-09-16 | Shale gas underground rock stratum hydraulic fracturing method and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010972090.6A CN112112619A (en) | 2020-09-16 | 2020-09-16 | Shale gas underground rock stratum hydraulic fracturing method and equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112112619A true CN112112619A (en) | 2020-12-22 |
Family
ID=73803169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010972090.6A Withdrawn CN112112619A (en) | 2020-09-16 | 2020-09-16 | Shale gas underground rock stratum hydraulic fracturing method and equipment thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112112619A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647917A (en) * | 2020-12-25 | 2021-04-13 | 浙江智卓工业机器人有限公司 | Electric hydraulic fracturing device for shale gas exploitation |
| CN117722132A (en) * | 2023-11-23 | 2024-03-19 | 中能建数字科技集团有限公司 | Method for reforming depleted gas reservoir into compressed air gas reservoir and product |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460703A (en) * | 2006-03-14 | 2009-06-17 | 普拉德研究及开发股份有限公司 | Method and apparatus for hydraulic fracturing and monitoring |
| CN107480383A (en) * | 2017-08-21 | 2017-12-15 | 中国石油大学(北京) | A kind of method by pressure measurement data monitoring water filling dynamic crack |
| US20180313198A1 (en) * | 2015-10-14 | 2018-11-01 | Daniel Orozco | Methods for hydraulic fracturing |
| CN110630243A (en) * | 2018-06-21 | 2019-12-31 | 中国石油化工股份有限公司 | Method for determining fracturing fracture parameters based on fracturing well production data |
| CN111350496A (en) * | 2020-03-19 | 2020-06-30 | 西安石油大学 | System and method for fracture characterization in underground hydraulic fracturing process |
-
2020
- 2020-09-16 CN CN202010972090.6A patent/CN112112619A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460703A (en) * | 2006-03-14 | 2009-06-17 | 普拉德研究及开发股份有限公司 | Method and apparatus for hydraulic fracturing and monitoring |
| US20180313198A1 (en) * | 2015-10-14 | 2018-11-01 | Daniel Orozco | Methods for hydraulic fracturing |
| CN107480383A (en) * | 2017-08-21 | 2017-12-15 | 中国石油大学(北京) | A kind of method by pressure measurement data monitoring water filling dynamic crack |
| CN110630243A (en) * | 2018-06-21 | 2019-12-31 | 中国石油化工股份有限公司 | Method for determining fracturing fracture parameters based on fracturing well production data |
| CN111350496A (en) * | 2020-03-19 | 2020-06-30 | 西安石油大学 | System and method for fracture characterization in underground hydraulic fracturing process |
Non-Patent Citations (3)
| Title |
|---|
| 孙钦瑞: "岩气开采压裂技术分析与思考", 《化工管理》 * |
| 陕亮等: "页岩气储层压裂改造关键技术及发展趋势", 《地质科技情报》 * |
| 雷群等: "油井重复压裂工艺技术研究", 《钻采工艺》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112647917A (en) * | 2020-12-25 | 2021-04-13 | 浙江智卓工业机器人有限公司 | Electric hydraulic fracturing device for shale gas exploitation |
| CN117722132A (en) * | 2023-11-23 | 2024-03-19 | 中能建数字科技集团有限公司 | Method for reforming depleted gas reservoir into compressed air gas reservoir and product |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2268597C (en) | Process for hydraulically fracturing oil and gas wells utilizing coiled tubing | |
| CN107313762B (en) | Shale hydraulic fracturing method | |
| US7237612B2 (en) | Methods of initiating a fracture tip screenout | |
| CN109958411B (en) | Horizontal well cluster perforation staged fracturing method | |
| US10060244B2 (en) | System and method for hydraulic fracturing with nanoparticles | |
| CN109958424B (en) | Method for effectively plugging end part of hydraulic fracture | |
| US7866395B2 (en) | Hydraulic fracture initiation and propagation control in unconsolidated and weakly cemented sediments | |
| US9587474B2 (en) | Completing a well in a reservoir | |
| Love et al. | Selectively placing many fractures in openhole horizontal wells improves production | |
| CA2921464C (en) | Well operations | |
| CN103967470A (en) | Method for fracturing horizontal well through penetrating shale layers | |
| CN112112619A (en) | Shale gas underground rock stratum hydraulic fracturing method and equipment thereof | |
| CN105443100A (en) | Fracturing method for controlling seam height by fixed-face perforation | |
| CN109424347A (en) | A kind of normal pressure deep layer shale gas volume fracturing method | |
| CN114059980B (en) | Shale reservoir fracturing method | |
| CN111927423B (en) | Shale sand fracturing pump-stopping fracturing steering method | |
| Kayumov et al. | Channel Fracturing Enhanced by Unconventional Proppant Increases Effectiveness of Hydraulic Fracturing in Devonian Formations of Russia's Oilfields | |
| Pandey et al. | New fracture-stimulation designs and completion techniques result in better performance of shallow Chittim Ranch wells | |
| WO2020243172A1 (en) | Proppant-free hydraulic fracturing | |
| WO2018190835A1 (en) | Staged propping of fracture networks | |
| Holditch et al. | Successful Stimulation of Deep Wells Using High Proppant Concentrations | |
| Humoodi et al. | Implementation of Hydraulic Fracturing Operation for a Reservoir in KRG | |
| CN106321053B (en) | A kind of well production increment method | |
| US3384176A (en) | Method of fracturing using dense liquid to direct propping agent into the fracture | |
| CN109983200B (en) | Method for detecting position (variable) of crack in well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20201222 |
|
| WW01 | Invention patent application withdrawn after publication |