CN104747157A - Foam fracturing fluid sand proportion concentrator for oil gas well and application thereof - Google Patents
Foam fracturing fluid sand proportion concentrator for oil gas well and application thereof Download PDFInfo
- Publication number
- CN104747157A CN104747157A CN201510032911.7A CN201510032911A CN104747157A CN 104747157 A CN104747157 A CN 104747157A CN 201510032911 A CN201510032911 A CN 201510032911A CN 104747157 A CN104747157 A CN 104747157A
- Authority
- CN
- China
- Prior art keywords
- sand
- fracturing fluid
- annular cavity
- gas well
- inspissator
- 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.)
- Pending
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Classifications
-
- 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
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
The invention discloses a foam fracturing fluid sand proportion concentrator for an oil gas well. The foam fracturing fluid sand proportion concentrator for the oil gas well comprises an outer pipe and a rotating inner pipe arranged in the axial direction of the outer pipe, wherein an annular cavity is formed between the outer pipe and the rotating inner pipe, a seal partition is arranged in the annular cavity and divides the inner cavity into a first annular cavity body and a second annular cavity body; a sand-carrying foaming liquid injection pipe and a concentrated liquid discharging pipe are arranged on the part, corresponding to the first annular cavity body, of the outer pipe respectively; liquid inlet seams are formed in the part, corresponding to the first annular cavity body, of the rotating inner pipe in a cut-through mode; a flow control valve and a liquid phase discharging pipe are arranged on the part, corresponding to the second annular inner cavity body, of the outer pipe; liquid outlet seams are formed in the part, corresponding to the second annular inner cavity body, of the rotating pipe in a cut-through mode. The foam fracturing fluid sand proportion concentrator for the oil gas well has the advantages that the sand proportion of sand-carrying foaming liquid is controlled to be higher, and therefore the sand portion of foaming fracturing fluid is improved, the pressure resistance, the wear resistance and the corrosion resistance are achieved, and the foam fracturing fluid sand proportion concentrator for the oil gas well is applicable to oil gas well fracturing construction use.
Description
Technical field
The present invention relates to a kind of Oil/gas Well foam fracturing fluid sand than inspissator and application thereof, belong to the technical field of oil-gas field fracturing transformation.
Background technology
Along with the petroleum gas energy demand and all strive day, increasing unconventional Low permeable oil and gas reservoirs is exploited, and the most effective mode of exploitation of hiding for these unconventionaloil pool carries out fracturing reform exactly, improve oil-production capacity.Foam fracturing technique has relative to conventional fracturing technology that silt carrying capacity is large, filter loss is low, pressure break usefulness is high, return the advantages such as discharge capacity is high, formation damage is little, is a kind of effective means of the unconventional Low permeable oil and gas reservoirs of exploitation.
At present, in most foam fracturing work progress, adopt the technical matters taking sand expanding foam solution and gases at high pressure ground mixed foaming, but take after sand expanding foam solution mixes with gases at high pressure, sand ratio there will be decline, and described sand ratio is: the ratio of fracturing fluid volume when proppant is piled volume and do not contained proppant.
Such as: in a fracturing fluid construction slug, the sand ratio taking sand expanding foam solution is 60%.After this takes the gases at high pressure mixed foaming of sand expanding foam solution and same volume, the foam fracturing fluid that foam quality is 50% can be obtained, but the sand ratio in foam fracturing fluid now only has about 30%; Further take after the long-pending gases at high pressure of sand expanding foam solution and triploid mix when above-mentioned, the foam fracturing fluid that foam quality is about 75% can be obtained, but foam fracturing fluid medium sand ratio is now only about 15%.Obviously, when foam quality is higher, sand is than taking the fall in sand expanding foam solution more obviously, and this phenomenon can cause the foam fracturing fluid being difficult to produce high sand ratio in construction.Therefore, in order to improve the sand ratio of foam fracturing fluid, giving full play to foam fracturing fluid and taking sand advantage, researching and developing a kind of Oil/gas Well foam fracturing fluid sand is very necessary than inspissator.
Summary of the invention
For the deficiency of existing foam fracturing technique, the invention provides a kind of Oil/gas Well foam fracturing fluid sand and compare inspissator.
The present invention also provides a kind of above-mentioned Oil/gas Well foam fracturing fluid sand than the application process of inspissator, the method can raise the sand ratio taking sand expanding foam solution, and then improve the sand ratio of foam fracturing fluid, the present invention has the features such as withstand voltage, wear-resisting, corrosion-resistant, the present invention is simultaneously simple to operate, high safety, usefulness is high.
Technical solution of the present invention is:
A kind of Oil/gas Well foam fracturing fluid sand compares inspissator, the rotating inner tube comprise outer tube, arranging in the axis of described outer tube, annular cavity is formed between described outer tube and rotating inner tube, in described annular cavity, be provided with sealing cut off, described annular cavity be divided into the first annular cavity and the second annular cavity; Outer tube corresponding to described first annular cavity is respectively arranged with and takes sand expanding foam solution ascending pipe and concentrate discharge pipe; On the rotating inner tube corresponding to described first annular cavity, the through feed liquor that is provided with stitches; Outer tube corresponding to described second annular cavity is respectively arranged with liquid phase discharge pipe, flow control valve; On the rotating inner tube corresponding to described second annular cavity, the through fluid that is provided with is stitched.The present invention utilizes the first annular cavity for load fluid flowing, second annular cavity is for liquid phase flowing, by the rotation of load fluid in the rotating band rotating ring sky of rotating inner tube, rotating the centrifugal force that causes to make in load fluid proppant particles away from rotating inner tube, and then forming high sand ratio load fluid near outer tube place, form low sand at close rotating inner tube place and compare load fluid.In the present invention, on the rotating inner tube corresponding to described first annular cavity, the through feed liquor that is provided with stitches, and its effect attracts the liquid phase in load fluid to flow in rotating inner tube, reduces the accounting of liquid phase in load fluid; On the rotating inner tube corresponding to described second annular cavity, the through fluid that is provided with is stitched, and the liquid phase in rotating inner tube is discharged in its effect; Be provided with flow control valve outside described liquid phase discharge pipe, effect is the discharge capacity of regulation and control liquid phase.
Preferred according to the present invention, the motor for rotating inner tube axial-rotation and bearing is provided with at the two ends of described outer tube, one end of described rotating inner tube is connected with described motor with rotating shaft one by flange one, and the other end of described rotating inner tube is connected with described bearing with rotating shaft two by flange two.
Preferred according to the present invention, be provided with in the outer tube side cut off away from sealing and described take sand expanding foam solution ascending pipe, the outer tube opposite side cut off near sealing is being provided with concentrate discharge pipe.
Preferred according to the present invention, described motor is divided into high, medium and low three gears by Frequency Converter Control rotating speed, the wherein corresponding motor speed 2000 ~ 3000r/min of high tap position, the corresponding motor speed 1000 ~ 2000r/min of middle gear, the corresponding motor speed 500 ~ 1000r/min of low-grade location.
Preferred according to the present invention, when motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 0 ~ 3m
3/ min; When motor is middle gear by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 3 ~ 7m
3/ min; When motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 7 ~ 12m
3/ min.
Preferred according to the present invention, the width of described feed liquor seam is 0.1 ~ 0.15mm.The effect herein designed is that feed liquor seam can stop that the proppant that particle diameter is greater than 0.16mm enters in rotating inner tube.
Preferred according to the present invention, the width of described fluid seam is 1 ~ 5mm.The effect herein designed is that the liquid phase in rotating inner tube can be discharged by fluid seam rapidly.
Preferred according to the present invention, the area of the feed liquor seam arranged on the surface of described rotating inner tube and be S
gross sectionwith described rotating inner tube cross-sectional area S
rotating inner tubewith outer tube cross-sectional area S
outer tuberelation as follows:
S
gross section=(1.0 ~ 2.0) × (S
outer tube-S
rotating inner tube).
The advantage herein designed is, adopts the feed liquor of certain accounting to stitch, and the unnecessary liquid phase flowed in inner load fluid can be discharged rapidly when pressure break by described Oil/gas Well fracturing fluid inspissator.
Above-mentioned Oil/gas Well foam fracturing fluid sand, than an application process for inspissator, comprises the steps:
(1) connection device: described sand expanding foam solution ascending pipe of taking is connected with pressure break pump truck, described concentrate discharge pipe is connected with external foam-making apparatus or Highpressure Tee, described liquid phase discharge pipe is connected with the water pot of job site;
(2) pressure testing: pass into high pressure clear water in described inspissator, keeps the highest operation pressure 30-40min, builds the pressure, do not sting do not leak be qualified; The highest operation pressure described herein is on-the-spot according to Specific construction and numerical value that is that determine;
(3) formation is concentrated takes sand expanding foam solution: starter motor, sand expanding foam solution discharge capacity respective value of initially taking according to working design regulates frequency converter gear, pass in described inspissator and take sand expanding foam solution, regulate frequency converter gear and flow control valve discharge capacity according to working design parameter.
Beneficial effect of the present invention:
The present invention is directed to the deficiency of existing foam fracturing technique, utilize the first annular cavity for load fluid flowing, second annular cavity is for liquid phase flowing, by the rotation of load fluid in the rotating band rotating ring sky of rotating inner tube, rotating the centrifugal force that causes to make in load fluid proppant particles away from rotating inner tube, and then forming high sand ratio load fluid near outer tube place, form low sand at close rotating inner tube place and compare load fluid.In the present invention, on the rotating inner tube corresponding to described first annular cavity, the through feed liquor that is provided with stitches, and its effect attracts the liquid phase in load fluid to flow in rotating inner tube, reduces the accounting of liquid phase in load fluid; On the rotating inner tube corresponding to described second annular cavity, the through fluid that is provided with is stitched, and the liquid phase in rotating inner tube is discharged in its effect; Be provided with flow control valve outside described liquid phase discharge pipe, effect is the discharge capacity of regulation and control liquid phase.The present invention can control to raise the sand ratio taking sand expanding foam solution, and then improves the sand ratio of foam fracturing fluid.
The present invention has the features such as withstand voltage, wear-resisting, corrosion-resistant, is applicable to well fracturing construction usage.The present invention is simple to operate, high safety, and usefulness is high.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of Oil/gas Well foam fracturing fluid sand of the present invention than inspissator;
In FIG, 1, motor; 2, frequency converter; 3, rotating shaft one; 4, flange one; 5, one is sealed; 6, sand expanding foam solution ascending pipe is taken; 7, rotating inner tube; 8, outer tube; 9, feed liquor seam; 10, concentrate discharge pipe; 11, sealing cuts off; 12, fluid seam; 13, flow control valve; 14, liquid phase discharge pipe; 15, three are sealed; 16, flange two; 17, rotating shaft two; 18, bearing; 19, the first annular cavity; 20, the second annular cavity.
Detailed description of the invention
Below in conjunction with embodiment and Figure of description, the present invention is described in detail, but is not limited thereto.
As shown in Figure 1.
Embodiment 1,
A kind of Oil/gas Well foam fracturing fluid sand compares inspissator, the rotating inner tube 7 comprise outer tube 8, arranging in the axis of described outer tube 8, annular cavity is formed between described outer tube 8 and rotating inner tube 7, in described annular cavity, be provided with sealing partition 11, described annular cavity be divided into the first annular cavity 19 and the second annular cavity 20; Outer tube 8 corresponding to described first annular cavity 19 is respectively arranged with and takes sand expanding foam solution ascending pipe 6 and concentrate discharge pipe 10; On the rotating inner tube corresponding to described first annular cavity 19, the through feed liquor that is provided with stitches 9; Outer tube 8 corresponding to described second annular cavity 20 is respectively arranged with flow control valve 13, liquid phase discharge pipe 14; On the rotating inner tube 7 corresponding to described second annular cavity 20, the through fluid that is provided with stitches 12.
The motor 1 for rotating inner tube 7 axial-rotation and bearing 18 is provided with at the two ends of described outer tube 8, one end of described rotating inner tube 7 is connected with described motor 1 with rotating shaft 1 by flange 1, and the other end of described rotating inner tube 7 is connected with described bearing 18 with rotating shaft 2 17 by flange 2 16.
Described motor 1 controls rotating speed by frequency converter 2 and is divided into high, medium and low three gears, wherein the corresponding motor speed 2000 ~ 3000r/min of high tap position, the corresponding motor speed 1000 ~ 2000r/min of middle gear, the corresponding motor speed 500 ~ 1000r/min of low-grade location.
When motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 0 ~ 3m
3/ min; When motor is middle gear by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 3 ~ 7m
3/ min; When motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 7 ~ 12m
3/ min.
The width of described feed liquor seam 9 is 0.1 ~ 0.15mm.
The width of described fluid seam 12 is 1 ~ 5mm.
The feed liquor arranged on the surface of described rotating inner tube 7 stitches the area of 9 and is S
gross sectionwith described rotating inner tube 7 cross-sectional area S
rotating inner tubewith outer tube cross-sectional area S
outer tuberelation as follows:
S
gross section=(1.0 ~ 2.0) × (S
outer tube-S
rotating inner tube).
Embodiment 2,
A kind of Oil/gas Well foam fracturing fluid sand compares inspissator as described in Example 1, its difference is, be provided with in outer tube 8 side away from sealing partition 11 and described take sand expanding foam solution ascending pipe 6, the outer tube opposite side near sealing partition 11 is being provided with concentrate discharge pipe 14.
Embodiment 3,
For certain coal bed gas straight well on-the-spot, for the fracturing stratum degree of depth 815 ~ 923m, payzone thickness 8m, payzone average temperature 35 DEG C, payzone mean permeability≤0.1 × 10
-3μm
2this well is new drilling straight-hole, substantially without production capacity, adopts foam fracturing technique, because stratum is frangible, for avoiding the high pressure packing phenomenon that near wellbore formation occurs in fracturing process, adopting fracturing fluid small displacement to construct, adding fracturing fluid inspissator of the present invention in layer of constructing to reduce load fluid discharge capacity, promote sand specific concentration, that is, as described in embodiment 1 or 2, Oil/gas Well foam fracturing fluid sand, than an application process for inspissator, comprises the steps:
(1) connection device: described sand expanding foam solution ascending pipe of taking is connected with pressure break pump truck, described concentrate discharge pipe is connected with external foam-making apparatus or Highpressure Tee, described liquid phase discharge pipe is connected with the water pot of job site;
(2) pressure testing: pass into high pressure clear water in described inspissator, keeps the highest operation pressure 30-40min, builds the pressure, do not sting do not leak be qualified; The highest operation pressure described herein is on-the-spot according to Specific construction and numerical value that is that determine;
(3) formation is concentrated takes sand expanding foam solution: starter motor, sand expanding foam solution discharge capacity respective value of initially taking according to working design regulates frequency converter gear, pass in described inspissator and take sand expanding foam solution, frequency converter gear and flow control valve discharge capacity is regulated: namely according to fracturing fluid inspissator working design parameter in table 1 according to working design parameter, the later stage that frequency converter is injecting prepad fluid 3 slug opens, and gear being adjusted to middle-grade, adjust flux control valve controls liquid phase discharge capacity.
Table 1. fracturing fluid inspissator working design parameter
The advantage adding fracturing fluid inspissator is: took sand expanding foam solution before entering foam maker, can be high discharge capacity, low sand ratio, This prevents proppant and especially takes in sand expanding foam solution in low viscosity in fracturing fluid and produce the phenomenon such as sand fallout, sand card.Foam fracturing fluid sand is close to foam maker than inspissator, can raise to enter and take sand expanding foam solution sand ratio in foam maker, can reduce to enter simultaneously and take sand expanding foam solution liquid content in foam maker, and then reduce the discharge capacity of foam, and improve foam fracturing fluid medium sand ratio.
As in table 1 when taking sand expanding foam solution sand ratio more than 20%, taking sand expanding foam solution discharge capacity is 5m
3/ min, corresponds to the later stage taking sand expanding foam solution 7 in fracturing fluid slug, and now, corresponding frequency converter is middle gear, and it is 2.5m that flow control valve controls liquid phase discharge capacity
3/ min.The discharge capacity of concentrate can be reduced to than inspissator and initially take 1/2 of sand expanding foam solution discharge capacity by sand, simultaneously can by the sand in concentrate than bringing up to initial 2 times of taking sand expanding foam solution medium sand ratio.
This fracturing fluid inspissator safety simple to operate, reduction is taken sand expanding foam solution discharge capacity, is carried the successful of high sand ratio.
Claims (9)
1. an Oil/gas Well foam fracturing fluid sand compares inspissator, it is characterized in that, the rotating inner tube that this inspissator comprises outer tube, arranges in the axis of described outer tube, annular cavity is formed between described outer tube and rotating inner tube, in described annular cavity, be provided with sealing cut off, described annular cavity be divided into the first annular cavity and the second annular cavity; Outer tube corresponding to described first annular cavity is respectively arranged with and takes sand expanding foam solution ascending pipe and concentrate discharge pipe; On the rotating inner tube corresponding to described first annular cavity, the through feed liquor that is provided with stitches; Outer tube corresponding to described second annular cavity is respectively arranged with flow control valve, liquid phase discharge pipe; On the rotating inner tube corresponding to described second annular cavity, the through fluid that is provided with is stitched.
2. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 compares inspissator, it is characterized in that, the motor for rotating inner tube axial-rotation and bearing is provided with at the two ends of described outer tube, one end of described rotating inner tube is connected with described motor with rotating shaft one by flange one, and the other end of described rotating inner tube is connected with described bearing with rotating shaft two by flange two.
3. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 compares inspissator, it is characterized in that, be provided with in the outer tube side cut off away from sealing and described take sand expanding foam solution ascending pipe, the outer tube opposite side cut off near sealing is being provided with concentrate discharge pipe.
4. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 compares inspissator, it is characterized in that, described motor is divided into high, medium and low three gears by Frequency Converter Control rotating speed, the wherein corresponding motor speed 2000 ~ 3000r/min of high tap position, the corresponding motor speed 1000 ~ 2000r/min of middle gear, the corresponding motor speed 500 ~ 1000r/min of low-grade location.
5. a kind of Oil/gas Well foam fracturing fluid sand according to claim 4 is than inspissator, it is characterized in that, when motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 0 ~ 3m
3/ min; When motor is middle gear by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 3 ~ 7m
3/ min; When motor is high tap position by Frequency Converter Control rotating speed, described in take the injection rate of sand expanding foam solution ascending pipe: 7 ~ 12m
3/ min.
6. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 is than inspissator, it is characterized in that, the width of described feed liquor seam is 0.1 ~ 0.15mm.
7. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 is than inspissator, it is characterized in that, the width of described fluid seam is 1 ~ 5mm.
8. a kind of Oil/gas Well foam fracturing fluid sand according to claim 1 is than inspissator, it is characterized in that, the surface of described rotating inner tube arrange feed liquor seam area and be S
gross sectionwith described rotating inner tube cross-sectional area S
rotating inner tubewith outer tube cross-sectional area S
outer tuberelation as follows:
S
gross section=(1.0 ~ 2.0) × (S
outer tube-S
rotating inner tube).
9. the Oil/gas Well application process of foam fracturing fluid sand than inspissator as described in claim 1-8 any one, comprises the steps:
(1) connection device: described sand expanding foam solution ascending pipe of taking is connected with pressure break pump truck, described concentrate discharge pipe is connected with external foam-making apparatus or Highpressure Tee, described liquid phase discharge pipe is connected with the water pot of job site;
(2) pressure testing: pass into high pressure clear water in described inspissator, keeps the highest operation pressure 30-40min, builds the pressure, do not sting do not leak be qualified;
(3) formation is concentrated takes sand expanding foam solution: starter motor, sand expanding foam solution discharge capacity respective value of initially taking according to working design regulates frequency converter gear, pass in described inspissator and take sand expanding foam solution, regulate frequency converter gear and flow control valve discharge capacity according to working design parameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032911.7A CN104747157A (en) | 2015-01-22 | 2015-01-22 | Foam fracturing fluid sand proportion concentrator for oil gas well and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032911.7A CN104747157A (en) | 2015-01-22 | 2015-01-22 | Foam fracturing fluid sand proportion concentrator for oil gas well and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104747157A true CN104747157A (en) | 2015-07-01 |
Family
ID=53587336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510032911.7A Pending CN104747157A (en) | 2015-01-22 | 2015-01-22 | Foam fracturing fluid sand proportion concentrator for oil gas well and application thereof |
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Citations (7)
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2015
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| US3828929A (en) * | 1973-01-22 | 1974-08-13 | W Hickey | Homogenizing method and apparatus |
| US4176064A (en) * | 1977-06-20 | 1979-11-27 | Palmer Engineering Company Ltd. | Mixture concentrator |
| US4354552A (en) * | 1980-09-08 | 1982-10-19 | The Dow Chemical Company | Slurry concentrator |
| US4448709A (en) * | 1980-11-06 | 1984-05-15 | Bullen Ronald S | Proppant concentrator |
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Application publication date: 20150701 |
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