CN1247876C - Method for improving low permeable mineral ieservoir - Google Patents
Method for improving low permeable mineral ieservoir Download PDFInfo
- Publication number
- CN1247876C CN1247876C CN 03122734 CN03122734A CN1247876C CN 1247876 C CN1247876 C CN 1247876C CN 03122734 CN03122734 CN 03122734 CN 03122734 A CN03122734 A CN 03122734A CN 1247876 C CN1247876 C CN 1247876C
- Authority
- CN
- China
- Prior art keywords
- reservoir
- formula
- slot
- horizontal
- width
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The prevent invention relates to a method for improving a low permeable mineral reservoir, which relates to the improvement on the production method of underground fluid energy source and minerals (such as petroleum, natural gas, coal bed gas, geothermal water, etc.). The production method of the prior art can not improve the permeability, and thus, the recovery rate of the minerals is rather low. The present invention provides a method for improving a low permeable mineral reservoir, which is characterized in that a low permeable mineral reservoir is slit horizontally, and a support belt can be left between adjacent slits. The present invention utilizes formulas to calculate the length, the width and the height for performing the horizontal slits and the width of the support belt aiming at the fluid state mineral reservoir under various conditions. Horizontal drilling can be performed in the reservoir by using water-jet-flow in underground mining and ground drilling exploitation. After the designed depth is achieved, the jet flow direction of a drill is changed, and transverse jet flow performs horizontally slitting to the reservoir. The ground stress of the reservoir is released; a rock mass sedimentates and ruptures so that the minerals can flow easily to form a fluid concourse area, and thus, the recovery rate of the minerals are increased greatly.
Description
Technical field
The present invention relates to improvement to underground fluid energy source, mineral (as oil, natural gas, coal bed gas, GEOTHERMAL WATER etc.) exploitation method.
Background technology
At present, domestic and international exploitation method to underground fluidised form mineral in the hyposmosis mineral reservoir mainly contains:
1, boring extraction method (comprising intensive boring, reaming method), its extraction effect depends on the characteristic of mineral reservoir itself fully, the permeability that hole, reaming all can not improve reservoir.In many cases, stress is concentrated the permeability that can reduce reservoir on the contrary around the boring, promptly forms the barrier of fluid stream of mineral to extraction boring, influences the exploitation of mineral.
2, hydrofracturing extraction method (comprising sand fracturing method etc.) during owing to employing water under high pressure fracturing or sand fracturing reservoir, only forms a gap in reservoir, it can not improve the permeability of reservoir preferably; On the contrary, this crack also can reduce its permeability on every side.
Because the permeability of mineral is very poor in the hyposmosis mineral reservoir, how effectively exploitation is a difficult problem in the art, and at present, the exploitation method of prior art can not be improved its permeability, thereby the rate of extraction of mineral is very low.
Summary of the invention
The objective of the invention is to overcome the shortcoming of prior art, a kind of method of transforming hyposmosis mineral reservoir is provided, its permeability is improved, mineral are easy to flow, form the assembling area of fluid, thereby increase substantially the rate of extraction of fluid mineral in the hyposmosis mineral reservoir.
The present invention is achieved through the following technical solutions its purpose:
A kind of method of transforming hyposmosis mineral reservoir is that hyposmosis mineral reservoir is implemented horizontal slot, and this horizontal slot moves towards horizontal along reservoir, along the approximate reservoir bottom surface that is parallel to of reservoir tendency.Leave support belt between the horizontal slot, or do not stay support belt.
Described horizontal slot, its height is calculated by formula: H 〉=M ε, and in the formula: H represents the slot height, and M represents reservoir thickness, and ε represents elastic strain.
Described horizontal slot, the technical data of its width value is: 3M 〉=B 〉=2M, in the formula: B represents the slot width, and M represents reservoir thickness.
Described horizontal slot is calculated by formula: L 〉=10M in the length of reservoir tendency direction, and in the formula: L represents its length, and M represents reservoir thickness.
The position of described horizontal slot in reservoir calculated by formula: V=(1/4-1/5) M apart from the height of reservoir bottom surface, and in the formula: V represents its height, and M represents reservoir thickness.
The support belt that leaves between the described horizontal slot, its width is approximate by formula: b=(0.5-0.6) B γ h/ (3 λ γ h+Rc) determines, in the formula: b is the width of support belt, B represents the slot width, γ is the mean specific gravity of rock stratum, h is the reservoir buried depth, and λ is a coefficient of horizontal pressure, and Rc is a rock uniaxiality strength.
During described horizontal slot pit mining, its operation is to implement along the reservoir middle and lower part in crossheading or tunnel, in the tunnel or the crossheading edge stay and protect lane and airtight extraction ore pillar, its width: c=5A, A are the width of tunnel or crossheading.
When described horizontal slot is exploited at the ground vertical drilling, be in a drilling well, radially to implement along the reservoir middle and lower part.
The implementation method of the method for described transformation hyposmosis mineral reservoir, be to adopt water jet in reservoir, to implement horizontal drilling, after reaching projected depth, transverse jet is implemented hydraulic slotted liner technique to reservoir, by the connection of several adjacent water jet horizontal slots that are positioned at same plane, with the design width of the slot that is up to the standard; To the thick mineral reservoir of spy, should be along the vertical layered execution horizontal slot of reservoir.
The present invention compared with prior art has the following advantages and effect.Owing in reservoir, implement horizontal slot, in the process of cutting seam and in a period of time after finishing slot, the reservoir rock mass produces inhomogeneous move (sedimentation, break) under the geostatic stress effect, thereby unload except stress partly, initial fissure in the reservoir rock mass is opened, improved the permeability of reservoir; The inhomogeneous deformation and the destruction of reservoir rock mass form the regeneration crack simultaneously, have further improved the permeability of reservoir, form around slot and are easy to the assembling area that fluid flows, and have improved the coefficient of mining of mineral, have shortened the exploitation time simultaneously, have improved production efficiency.The present invention is a kind of perfect method of transforming hyposmosis mineral reservoir.
Below will be in conjunction with the accompanying drawings by embodiment, the present invention is further illustrated.
Description of drawings
Fig. 1 be the present invention when pit mining, implement the horizontal profile schematic diagram of horizontal slot;
Fig. 2 be the present invention when pit mining, implement the vertical cut-away schematic view of horizontal slot;
Fig. 3 be the present invention when the ground vertical drilling is exploited, implement the horizontal profile schematic diagram of horizontal slot.
Fig. 4 is a horizontal profile schematic diagram of implementing horizontal slot in the specific embodiment of the present invention;
Fig. 5 is the vertical cut-away schematic view of Fig. 4;
Fig. 6 be the present invention when pit mining, the vertical cut-away schematic view of horizontal slot is implemented in thick reservoir layering;
The specific embodiment
Embodiment 1:
As shown in Figure 1, 2, when pit mining, a kind of method of transforming hyposmosis mineral reservoir, be that hyposmosis mineral reservoir 1 is implemented horizontal slot 4, this horizontal slot moves towards horizontal along reservoir, is parallel to the reservoir bottom surface along the reservoir tendency is approximate, leaves support belt 5 between the horizontal slot.
Described horizontal slot, its height is calculated by formula: H 〉=M ε, and in the formula: H represents the slot height, and M represents reservoir thickness, and ε represents elastic strain.
Described horizontal slot, the technical data of its width value is: 3M 〉=B 〉=2M, in the formula: B represents the slot width, and M represents reservoir thickness.
Described horizontal slot is calculated by formula: L 〉=10M in the length of reservoir tendency direction, and in the formula: L represents its length, and M represents reservoir thickness.
The position of described horizontal slot in reservoir calculated by formula: V=(1/4-1/5) M apart from the height of reservoir bottom surface, and in the formula: V represents its height, and M represents reservoir thickness.
The support belt that leaves between the described horizontal slot, its width is approximate by formula: b=(0.5-0.6) B γ h/ (3 λ γ h+Rc) determines, in the formula: b is the width of support belt, B represents the slot width, γ is the mean specific gravity of rock stratum, h is the reservoir buried depth, and λ is a coefficient of horizontal pressure, and Rc is a rock uniaxiality strength.
Its operation is to implement along the reservoir middle and lower part in crossheading 6 or tunnel, in the tunnel or the crossheading edge stay and protect lane and airtight extraction ore pillar, its width C=5A, A are the width of tunnel or crossheading.
Embodiment 2:
As shown in Figure 3, when the ground vertical drilling is exploited, a kind of method of transforming infiltration mineral reservoir, be in a drilling well 7, in same horizontal plane, radially reservoir 1 is implemented horizontal drilling 2, after reaching projected depth, change the jet direction of drill bit, when drill bit returned from inside to outside, transverse jet was implemented horizontal slot 3 to reservoir; Repeat above-mentioned steps, reservoir radially forms radial many horizontal slots, and leaves support belt 5 between the adjacent slot, and the reservoir geostatic stress obtains discharging, rock mass produces sedimentation and breaks thereby make.The calculating of technical datas such as the height H of horizontal slot 3, width B, length L together
Embodiment 3:
Shown in Fig. 4,5, when pit mining, a kind of method of transforming hyposmosis mineral reservoir, be to use the water jet rig, at first in reservoir 1, implement horizontal drilling 2, after reaching projected depth, change the jet direction of drill bit, when drill bit returned from inside to outside, transverse jet was implemented horizontal slot 3 to reservoir; Repeat above-mentioned steps, form the horizontal slot of many connections, to reach the width of design level slot.Stay then and establish support belt 5, implement next horizontal slot again, so the construction of horizontal slot is finished in circulation.The reservoir geostatic stress obtains discharging, rock mass produces sedimentation and breaks thereby make.The slag of cutting and waste water are discharged by the construction hole together, carry out the extraction of fluid mineral after construction is finished.
Described horizontal slot, its height is calculated by formula: H 〉=M ε, and in the formula: H represents the slot height, and M represents reservoir thickness, and ε represents elastic strain.500 meters of present embodiment ore bed buried depths, reservoir thickness M are 10 meters, and the slot height H is 0.03 meter as calculated.
Described horizontal slot, the technical data of its width value is: 3M 〉=B 〉=2M, in the formula: B represents the slot width, and M represents reservoir thickness.The slot width B is got 20-30 rice.
Described horizontal slot is calculated by formula: L 〉=10M in the length of reservoir tendency direction, and in the formula: L represents its length, and M represents reservoir thickness.Horizontal slot is in length 〉=100 of reservoir tendency direction meter.
The position of described horizontal slot in reservoir calculated by formula: V=(1/4-1/5) M apart from the height of reservoir bottom surface, and in the formula: V represents its height, and M represents reservoir thickness.The flat slot of fetching water is a 2-2.5 rice apart from the height V of reservoir bottom surface.
The support belt that leaves between the described horizontal slot, its width is approximate by formula: b=(0.5-0.6) B γ h/ (3 λ γ h+Rc) determines, in the formula: b is the width of support belt, B represents the slot width, γ is the mean specific gravity of rock stratum, h is the reservoir buried depth, and λ is a coefficient of horizontal pressure, and Rc is a rock uniaxiality strength.Support belt width b is a 1-3 rice as calculated.
Its operation is to implement along the reservoir middle and lower part in crossheading 6 or tunnel, in the tunnel or the crossheading edge stay and protect lane and airtight extraction ore pillar, its width C=5A, A are the width of tunnel or crossheading.The width A of general crossheading is 2 meters, and the ore pillar width C is 10 meters.
Embodiment 4:
As shown in Figure 6, reservoir 1 is special when thick, should be along the vertical layered execution horizontal slot 4 of reservoir.Every layer job practices is the same.
Claims (4)
1, a kind of method of transforming hyposmosis mineral reservoir, be to implement horizontal slot along reservoir, it is characterized in that: in the ground drilling mode is exploited, low permeability reservoir is implemented horizontal slot, in underground mining methods and ground drilling exploitation method, its horizontal slot is calculated by formula: V=(1/4～1/5) M apart from the height of reservoir bottom surface, and in the formula: V represents its height, and M represents reservoir thickness; The height of horizontal slot is calculated by formula: H 〉=M ε, and in the formula: H represents the slot height, and M represents reservoir thickness, and ε represents elastic strain; The width value of horizontal slot is: 3M 〉=B 〉=2M, and in the formula: B represents the slot width, and M represents reservoir thickness; Horizontal slot is calculated by formula: L 〉=10M in the length of reservoir tendency direction, and in the formula: L represents its length, and M represents reservoir thickness.
2, according to the method for the described transformation hyposmosis of claim 1 mineral reservoir, it is characterized in that: the support belt between the described horizontal slot, its width is approximate by formula: b=(0.5～0.6) B γ h/ (3 λ γ h+Rc) determines, in the formula: b is the width of support belt, B represents the slot width, and γ is the mean specific gravity of rock stratum, and h is the reservoir buried depth, λ is a coefficient of horizontal pressure, and Rc is a rock uniaxiality strength.
3, according to the method for the described transformation hyposmosis of claim 1 mineral reservoir, it is characterized in that: describedly in the ground drilling mode is exploited low permeability reservoir being implemented horizontal slot, is by radially reservoir being implemented horizontal slot in the same horizontal plane in the drilling well.
4, according to the method for the described transformation hyposmosis of claim 1 mineral reservoir, it is characterized in that: described execution horizontal slot, be to adopt water jet in reservoir, to implement horizontal drilling, after reaching projected depth, transverse jet is implemented hydraulic slotted liner technique to reservoir, by the connection of several adjacent water jet horizontal slots that are positioned at same plane, with the design width of the slot that is up to the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03122734 CN1247876C (en) | 2003-04-18 | 2003-04-18 | Method for improving low permeable mineral ieservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03122734 CN1247876C (en) | 2003-04-18 | 2003-04-18 | Method for improving low permeable mineral ieservoir |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1443926A CN1443926A (en) | 2003-09-24 |
| CN1247876C true CN1247876C (en) | 2006-03-29 |
Family
ID=27815028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03122734 Expired - Fee Related CN1247876C (en) | 2003-04-18 | 2003-04-18 | Method for improving low permeable mineral ieservoir |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1247876C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101737029B (en) * | 2009-11-25 | 2012-12-19 | 北京科技大学 | Crude oil extraction method capable of effectively utilizing ultra-low permeability reservoir bed |
-
2003
- 2003-04-18 CN CN 03122734 patent/CN1247876C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1443926A (en) | 2003-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101832149B (en) | Method for extracting coal seam gas by underground heat injection | |
| CN106285477B (en) | Underground coal mine adopt gas pumping top plate face upward wear layer orientation hole construction method | |
| US8287050B2 (en) | Method of increasing reservoir permeability | |
| CN102337919B (en) | A four-period-five-purpose hole-drilling high-efficiency gas extracting process | |
| CN111520119A (en) | Method for efficiently extracting coal bed gas by staged fracturing of large-spacing thin coal seam group multi-bottom horizontal well | |
| CN107120137B (en) | A kind of coal roadway tunneling is along seat earth Deephole pre-splitting blasting pumping method | |
| CN102392678A (en) | Gas drainage method combining surface and underground fracturing and permeability improvement | |
| CN102392677A (en) | Permeability improvement technology for coal bed gas reservoir cap by using three-dimensional fracture network modification | |
| RU2612061C1 (en) | Recovery method of shale carbonate oil field | |
| AU2003249021A1 (en) | Wellbore plug system and method | |
| CN111827878B (en) | Method for quickly and accurately probing hidden water inrush channel of coal seam floor | |
| CN110318674A (en) | A kind of method of back fracturing protrusion-dispelling | |
| CN104895531A (en) | Single thick coal seam ground mining well extraction process | |
| CN2913612Y (en) | Well bore enclosed type coal bed air extraction well | |
| CN109162643B (en) | Drilling completion method for continuous shale reservoir | |
| CN110306965A (en) | A kind of method for increasing for coal bed gas low yield wellblock | |
| CN109162713B (en) | Coal-water dual-resource mine mining method without changing overlying strata hydrogeological conditions | |
| RU2612060C1 (en) | Method of development of carbonate shaly oil deposits | |
| CN107620581A (en) | The construction method of the dual-purpose mine shaft inspection hole of one well | |
| Xiumin et al. | Research and application of gas-lift reverse circulation drilling technology to geothermal well construction in Dalian Jiaoliu Island | |
| CN109322618B (en) | Method for completing drilling of heterogeneous shale gas well reservoir section | |
| CN1190585C (en) | Down-the-hole hammer percussion static-pressure cased-drilling method for unconsolided and broken formation | |
| CN107100666A (en) | Quick-fried crowded extinction and dust-removing method under a kind of Coal Seam Prone To Outburst coal roadway tunneling | |
| CN105756591A (en) | Coal bed gas well completion method | |
| CN116988733A (en) | Mining-while-mining and filling coal mining method based on roof horizontal well side drilling holes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |