CN203362143U - Horizontal well one-trip drilling fracture completion string - Google Patents
Horizontal well one-trip drilling fracture completion string Download PDFInfo
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- CN203362143U CN203362143U CN 201320355334 CN201320355334U CN203362143U CN 203362143 U CN203362143 U CN 203362143U CN 201320355334 CN201320355334 CN 201320355334 CN 201320355334 U CN201320355334 U CN 201320355334U CN 203362143 U CN203362143 U CN 203362143U
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Abstract
The utility model relates to the field of oil and gas field exploration and development, in particular to a horizontal well one-trip drilling fracture completion string and process thereof for reservoir reform in oil and gas field exploration and development. The completion string at least comprises an oil pipe (2) connected with the inside of a bushing (1) in a sleeved mode, and is characterized in that the lowermost end of the oil pipe (2) is provided with a water power spray gun (3), the side portion of the water power spray gun (3) is provided with a spray gun hole, the bottom of the water power spray gun (3) is provided with a ball base (5) capable of holding a steel ball (6), and the bushing (1) and the well opening end of the oil pipe (2) are provided with bushing valves (7) and oil pipe valves (8) respectively. The completion string can finish all procedures of a horizontal well in a one-trip drilling mode, well control risks are reduced, times of drill replacement are reduced, a schedule is accelerated, and the speeding-up effect is obvious. Meanwhile, the number of packers and the number of water power spray guns are reduced, abrasion of the oil pipe is reduced, the utilization rate is improved, and development cost of the horizontal well is reduced.
Description
Technical field
The utility model relates to exploration of oil and gas field and development field, and particularly in a kind of exploration of oil and gas field and exploitation, the pressure of the drill of horizontal well of reservoir reconstruction splits completion tubular column.
Background technology
Current domestic horizontal well in segments reforming technology technology has bridging plug packing pressure break, packer packing every modes such as pressure break, the packing of sand plug and liquid gum plug packings, take packer staged fracturing technology as main.Packer packing is the packer drag fracturing at the bottom of fracturing technology comprises again single spraying emitter band, packer staged fracturing at the bottom of the dual jet band, as, the PSK multi-stage water power sprays staged fracturing.Although the pressure break of spraying the PSK multi-stage water power can realize 10 sections left and right of one-trip string construction, greatly saved the number of times made a trip, between but each construction layer is inferior, must carry out the operations such as open flow step-down, backwash, between each construction layer for up to 2-5 hour, be not optimum reservoir High Efficiency Reform means.The main purpose of technology speed-raising is to shorten waiting between the stopping time between each layer, improves the pressing crack construction utilization rate of equipment and installations, reduces and changes the tubing string number of times, shortens waiting between the stopping time between each process links of horizontal well construction.
In addition, the PSK multi-stage water power sprays pressure break can realize 10 sections left and right of one-trip string construction, because of this operating tool string, with packer, can not carry out the annular space sand fracturing, also just can not realize that oil jacket closes the technological requirement of the large discharge capacity of notes (3-12 side/dividing) volume fracturing.
Jetting band lower packet drag fracturing technology has been ripe technology, has solved the technical barrier of staged fracturing of horizontal well; But, along with the horizontal well construction scale is increasing, construction well number is more and more, this technique can not meet horizontal well scale and the batch production requirement of construction fast.There is following problem in this technique:
1, between each construction interval, carry out open flow and reach 2-5 hour, after borehole pressure is discharged, recoil and just on active well head, carry construction tool about half an hour, carry out the construction of next interval, during fracturing unit etc. stop reaching 2-5 hour, 1-3 the intervals of could constructing at most every day, speed of application is slow slowly, becomes one of main restricting factor of low-permeability oil gas reservoir exploitation.
2, during each interval pressure break, after all fracturing sand liquid will spray from spray gun, then enter the construction interval, the life-span of spray gun is limited, at most can only pressure break 2-3 layer 90 sand in many ways.Even adopt PSK multilevel hierarchy construction technology can not meet the demand of horizontal well multistage subsection fracturing technology, when in well, the construction interval reaches 20 sections left and right, the minimum replacing 2-3 that needs plows tubing string, causes the pollution to environment of well control risk and open flow; Pressing crack construction also will wait and stop 2-3 days, is also one of principal element of restriction production technology speed-raising.
3, every saliva horizontal well needs the through wash well to bore for one time, and hydraulic jetting fracturing approximately needs 2-3 to plow brill, and sand washing needs to bore for one time, every mouthful of minimum 4-5 that approximately needs of well plows removing of brill, just can complete construction operation, and huge manpower workload is born by operation team, the pollution of returning fluid's body to environment, the well control risk while making a trip.
4, due to the packer that is connected with several separate stratum fracfturings on construction tool in well and uses, can not carry out large discharge capacity (3-10 side/minute) annular space and inject, can not meet the technological requirement of large-scale volume fracturing.
5, the scope of construction item of " three is low " oil-gas reservoir is increasing, the operational discharge capacity in oil pipe, and sand is than improving year by year.In oil pipe maximum operational discharge capacity can only meet 2.5-3 side/minute construction volume, under this operational discharge capacity, every time operating tool string oil pipe used can only be used just need be scrapped for 2-3 time, has increased the development cost of horizontal well.
The utility model content
The purpose of this utility model is to provide the pressure of the drill of a kind of horizontal well and splits completion tubular column and technique thereof, this technique can have been bored every operation of horizontal well for one time, reduce the well control risk, reduce the number of times of changing drilling tool, can accelerate the speed-raising progress, the speed-raising effect is remarkable, also can save packer and waterpower spray gun simultaneously, reduce the wearing and tearing of oil pipe, increase utilization rate, reduce the horizontal well development cost.
The technical scheme that the utility model solves its technical problem employing is, the pressure of the drill of horizontal well splits completion tubular column, which comprises at least the oil pipe be socketed in sleeve pipe, it is characterized in that: oil pipe is furnished with the waterpower spray gun bottom, waterpower spray gun sidepiece is the spray gun eyelet, bottom is for placing the ball seat of steel ball, and the uphole end of sleeve pipe and oil pipe has respectively sleeve valve and tubing valve.
Described ball seat is the bell mouth shape structure of shrinking gradually, and horn mouth place, below diameter is less than steel ball size.
But described waterpower spray gun is spray gun eyelet place, the closing type waterpower spray gun of sliding sleeve is arranged.
One-trip string can complete horizontal well through wash well, hydraulic jet perforation, pressure break, sanding plug, sand washing process.
The beneficial effects of the utility model comprise following some:
1, the utility model bores every operation that can complete horizontal well one time, and every mouthful of well can be saved to make a trip and bore for 5 times, reduces the well control risk, reduces the number of times of changing drilling tool, can accelerate the progress 3-5 days that raises speed, and the speed-raising effect is remarkable.
2, each construction interval due to pressure break after the shutoff of sand plug enter well fracturing fluid and return out passage, without open flow, can effectively utilize between stopping times such as open flow of 2-5 hour, but every day multiple pressure layer 2-3 section, can significantly improve the utilization rate of fracturing unit, every mouthful of well shortens pressing crack construction time 2-3 days.
3, only participate in hydraulic jet perforation because of the waterpower spray gun, a spray gun can meet the perforation requirement of all sections, every mouthful of well can be saved 4-5 packer and waterpower spray gun, simultaneously because of in well without packer, the construction drilling tool is few, reduce the risk of construction bit freezing, improved the engineering safety of fractured horizontal well construction.
4, the structure of this operating tool string and principle, can meet the technological requirement of large-scale volume fracturing, accelerates the speed of application of volume fracturing, after construction, the large tank of on-the-spot liquid storage is vacant, can be in the sand washing operation, by sand removing process using, returning fluid's body is all reclaimed, for the construction of end opening well; Reach construction liquid, sand recycling, realize the essential requirement of safety and environmental protection.
5, return out without open flow liquid after the pressure, reduced the sewage amount of storage in construction well site, the area that cesspit takies well site, increase the area that wellsite facility is put, meet the demand of large-scale volume fracturing well to well site.
The operational discharge capacity that 6, also can reduce oil pipe to 1.5-2.0 side/minute in, increase the operational discharge capacity in sleeve pipe, meet the total displacement of construction, reduce the wearing and tearing to oil pipe, increase the effective rate of utilization of oil pipe, greatly reduce the cost of horizontal well development.
7, just meet the technological requirement of abrasive perforating because of oil pipe, therefore, can adopt minor diameter tubing, as, internal diameter is 2 " oil pipe, can save a large amount of steel tubings, further reduce the cost of horizontal well development.
8, this operating tool string is similar to the blank tubing construction, therefore, in pressing crack construction process, sand-laden fluid high concentration ground can be injected in oil pipe, just inject fracturing base fluid in sleeve pipe, sand liquid is mixed in oil pipe exit and sleeve pipe injection liquid, avoid when sleeve pipe adds sand, sand sand fallout in horizontal segment forms sand plug; And, in work progress, when finding that operation pressure raises, that can reduce in time oil pipe adds the sand discharge capacity, improve the operational discharge capacity of sleeve pipe, reduce the total sand ratio of construction, can get rid of in time the sand bridge formed in work progress, prevent that in oil reservoir, sand fallout forms sand plug, further improve the level of fracturing technology.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1 is the tubular column structure schematic diagram.
Fig. 2 is the first interval construction schematic diagram;
Fig. 3 is the second interval construction schematic diagram;
In figure: 1, sleeve pipe; 2, oil pipe; 3, waterpower spray gun; 4, spray gun eyelet; 5, ball seat; 6, steel ball; 7, sleeve valve; 8, tubing valve; 9, the first interval; 10, the second interval; 11, sand plug.
The specific embodiment
Embodiment 1
As shown in this tubular column structure schematic diagram of Fig. 1, oil pipe 2 is socketed in sleeve pipe 1, and oil pipe 2 is furnished with waterpower spray gun 3 bottom, and waterpower spray gun 3 sidepieces are the spray gun eyelet, bottom is for placing the ball seat 5 of steel ball 6, and the uphole end of sleeve pipe 1 and oil pipe 2 has respectively sleeve valve 7 and tubing valve 8.
Wherein ball seat 5 is the bell mouth shape structure of shrinking gradually, horn mouth place, below diameter is less than steel ball 6 diameters, while needing abrasive perforating, by steel ball 6, in oil pipe 2, put into ball seat 5, form ball-and-seat, the liquid of abrasive perforating is sprayed from spray gun eyelet 4, reach the technological requirement of abrasive perforating; In the time will carrying out sand fracturing, utilize the pressure in well, steel ball 6 is returned out well from oil pipe 2 bottoms, allow fracturing sand liquid discharge from the horn mouth of oil pipe 2 lower end ball seats 5, oil-gas Layer is carried out to pressure break, reduce the wearing and tearing of sand liquid to spray tip.
But waterpower spray gun 3 is closing type waterpower spray gun, there is sliding sleeve at spray gun eyelet 4 places of waterpower spray gun 3, control the switching of spray gun eyelet 4 by the position of controlling sliding sleeve, and this structure formerly applied for Patents and be widely used, and its structure does not describe in detail at this.
One-trip string can complete horizontal well through wash well, hydraulic jet perforation, pressure break, sanding plug, sand washing process.
The pressure of the drill of this horizontal well splits well-completing process and comprises the steps:
A, oil pipe 2 is lowered into to bottom hole location, sleeve pipe 1 is carried out to the anti-circulation well cleanup of large discharge capacity, and sleeve pipe 1 is carried out to pressure testing, reach through wash well technological standards;
B, on carry oil pipe 2 the first interval 9 positions to horizontal well construction, see Fig. 2;
C, from the oil pipe 2 upper port steel ball 6 of moving in, and steel ball 6 is pumped on ball seat 5, the spray liquid flows in oil pipe 2 only can be sprayed from spray gun eyelet 4, now, the pressure of ground construction pump can reach the jetting operation pressure; Open tubing valve 8, by the first interval 9 in 2 pairs of horizontal wells of oil pipe, carry out single bunch or many bunches of jettings;
D, close the oil reservoir that sleeve valve 7 presses off the first interval 9 after having sprayed, owing to having closed sleeve valve 7, oil pipe 2 continues to spray into by spray gun eyelet 4 fracturing fluid that is not more than 10 cubes, make the oil reservoir internal pressure increase, then oil pipe 2 stops injecting fracturing fluid, utilize the pressure that in oil reservoir, filling liquid forms, from oil pipe 2 open flows, drive steel ball 6 in the open flow process and return outside flowline 2;
E, on carry oil pipe 2 to second intervals 10;
F, pass sleeve valve 7, allow fracturing sand liquid discharge from the horn mouth of oil pipe 2 lower end ball seats 5, and the oil-gas Layer of the first interval 9 is carried out to pressure break;
G, when the displacement fluid of pressing crack construction has been annotated, carry out 11 operations of sanding plug, reach the technological requirement of sand plug 11 shutoff oil-gas Layer, see Fig. 3;
H, the interior unnecessary sand of recoil flowline 2;
I, repeating step c, to step h, to the second interval 10 constructions, have constructed all intervals so repeatedly;
J, after last layer of construction completes, after the emptying borehole pressure, utilize former drilling tool to fill in capable hydraulic sand washing to sand in well.
Wherein the process of step g sanding plug is: when the pressing crack construction displacement fluid has been annotated, carry high sand ratio and reach 50-60%, sand plug liquid measure is oil pipe 2 lower part outlet ends to the 1.5-1.8 of hole volume between the construction interval doubly, and sanding plug liquid must, from the interior injection of oil pipe 2, can not inject from sleeve pipe 1; After with normal operational discharge capacity, sand plug liquid pump being delivered to oil pipe 2 ports of export, reduction operational discharge capacity≤1.0 sides/minute; In the infusion process, strata pressure can raise gradually, termination of pumping when pressure is increased to pit shaft load rated safety pressure, the speed of measuring and calculating pressure drop, and the pressure of repeatedly spraining makes the further compacting in gap formed between the sand of sand plug 11, the flow conductivity of sand plug 11 is descended, strengthen the adhesive power of sand plug 11 and sleeve pipe 1 inwall, the termination of pumping pressure shutoff after making in well to construct is in stratum, pressure drop speed reaches the wellbore pressure test requirement, play the packing effect of separate stratum fracfturing, for N-80,5-
1/
2" sleeve pipe of grade of steel, pressure is up to 50MPa.
The hydraulic sand washing process of step j is: from the steel ball that has high input in oil pipe 2, the diameter of big steel ball is greater than shutoff oil pipe 2 horn mouth steel ball 6 diameter 2-4mm used, and be pumped on the sliding sleeve of waterpower spray gun 3, open sliding sleeve, the spray gun eyelet 4 of waterpower spray gun is blocked, sand cleaning fluid stream enters from sleeve pipe 1 well head, oil pipe horn mouth through bottom enters in oil pipe 2, after sand liquid plug erosion in well is broken, by oil pipe 2, returned out outside well, reach the technological requirement of erosion sand plug.
The utility model bores every operation that can complete horizontal well one time, and every mouthful of well can be saved to make a trip and bore for 5 times, reduces the well control risk, reduces the number of times of changing drilling tool, can accelerate the progress 3-5 days that raises speed, and the speed-raising effect is remarkable.
Each construction interval due to pressure break after the shutoff of sand plug enter well fracturing fluid and return out passage, without open flow, can effectively utilize between stopping times such as open flow of 2-5 hour, but every day multiple pressure layer 2-3 section, can significantly improve the utilization rate of fracturing unit, every mouthful of well shortens pressing crack construction time 2-3 days.
Because the waterpower spray gun is only participated in hydraulic jet perforation, a spray gun can meet the perforation requirement of all sections, every mouthful of well can be saved 4-5 packer and waterpower spray gun, simultaneously because of in well without packer, the construction drilling tool is few, reduce the risk of construction bit freezing, improved the engineering safety of fractured horizontal well construction.
The structure of this operating tool string and principle, can meet the technological requirement of large-scale volume fracturing, accelerates the speed of application of volume fracturing, after construction, the large tank of on-the-spot liquid storage is vacant, can be in the sand washing operation, by sand removing process using, returning fluid's body is all reclaimed, for the construction of end opening well; Reach construction liquid, sand recycling, realize the essential requirement of safety and environmental protection.
Return out without open flow liquid after pressure, reduced the sewage amount of storage in construction well site, the area that cesspit takies well site, increase the area that wellsite facility is put, meet the demand of large-scale volume fracturing well to well site.
The operational discharge capacity that also can reduce oil pipe to 1.5-2.0 side/minute in, increase the operational discharge capacity in sleeve pipe, meet the total displacement of construction, reduce the wearing and tearing to oil pipe, increase the effective rate of utilization of oil pipe, greatly reduce the cost of horizontal well development.
Because oil pipe just meets the technological requirement of abrasive perforating, therefore, can adopt minor diameter tubing, as, internal diameter is 2 " oil pipe, can save a large amount of steel tubings, further reduce the cost of horizontal well development.
This operating tool string is similar to the blank tubing construction, therefore, in pressing crack construction process, sand-laden fluid high concentration ground can be injected in oil pipe, just inject fracturing base fluid in sleeve pipe, sand liquid is mixed in oil pipe exit and sleeve pipe injection liquid, avoid when sleeve pipe adds sand, sand sand fallout in horizontal segment forms sand plug; And, in work progress, when finding that operation pressure raises, that can reduce in time oil pipe adds the sand discharge capacity, improve the operational discharge capacity of sleeve pipe, reduce the total sand ratio of construction, can get rid of in time the sand bridge formed in work progress, prevent that in oil reservoir, sand fallout forms sand plug, further improve the level of fracturing technology.
Claims (3)
1. the pressure of the drill of horizontal well splits completion tubular column, which comprises at least the oil pipe (2) be socketed in sleeve pipe (1), it is characterized in that: oil pipe (2) is furnished with waterpower spray gun (3) bottom, waterpower spray gun (3) sidepiece is the spray gun eyelet, bottom is for placing the ball seat (5) of steel ball (6), and the uphole end of sleeve pipe (1) and oil pipe (2) has respectively sleeve valve (7) and tubing valve (8).
2. the pressure of the drill of horizontal well according to claim 1 splits completion tubular column, it is characterized in that: the bell mouth shape structure of described ball seat (5) for shrinking gradually, horn mouth place, below diameter is less than steel ball (6) diameter.
3. the pressure of the drill of horizontal well according to claim 1 splits completion tubular column, it is characterized in that: described waterpower spray gun (3) for spray gun eyelet (4) but locate the closing type waterpower spray gun of sliding sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320355334 CN203362143U (en) | 2013-06-20 | 2013-06-20 | Horizontal well one-trip drilling fracture completion string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320355334 CN203362143U (en) | 2013-06-20 | 2013-06-20 | Horizontal well one-trip drilling fracture completion string |
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| Publication Number | Publication Date |
|---|---|
| CN203362143U true CN203362143U (en) | 2013-12-25 |
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| CN 201320355334 Expired - Fee Related CN203362143U (en) | 2013-06-20 | 2013-06-20 | Horizontal well one-trip drilling fracture completion string |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306645A (en) * | 2013-06-20 | 2013-09-18 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Once drilling fracturing completion pipe string of horizontal well and drilling fracturing completion technology |
-
2013
- 2013-06-20 CN CN 201320355334 patent/CN203362143U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103306645A (en) * | 2013-06-20 | 2013-09-18 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Once drilling fracturing completion pipe string of horizontal well and drilling fracturing completion technology |
| CN103306645B (en) * | 2013-06-20 | 2015-10-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Horizontal well the pressure of the drill splits completion tubular column and technique thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131225 Termination date: 20170620 |
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| CF01 | Termination of patent right due to non-payment of annual fee |