CN104153752A - Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well - Google Patents
Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well Download PDFInfo
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- CN104153752A CN104153752A CN201410423387.1A CN201410423387A CN104153752A CN 104153752 A CN104153752 A CN 104153752A CN 201410423387 A CN201410423387 A CN 201410423387A CN 104153752 A CN104153752 A CN 104153752A
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Abstract
The invention belongs to the field of oil and gas field exploration and development and particularly relates to a hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for a horizontal well. The technology comprises the following steps that (1) drilling tools are put down into the well, and steel balls are thrown into the well; (2) hydraulic jetting is performed, and pre-compression is performed; (3) the drilling tools are lifted to a lower-segment construction position, and the steel balls are kicked out; (4) fracturing construction is performed; (5) sand filling is performed; (6) after the first-segment construction is completed, the steel balls are thrown into the well for performing second-segment sandblasting perforating and pre-compression procedures, and the steps are repeated until the fracturing construction of the whole well is completed. Different from a conventional packer stratified fracturing technology for a horizontal well, according to the hydraulic jetting tubing sand filling stratified multi-stage fracturing technology, the simple tools comprising oil tubing, a safety release, a spray gun and a check valve from top to bottom are put down into the well, so that mechanical stratified fracturing is transformed into tubing sand filling stratified fracturing, and the problems that the height of a sand plug cannot be well controlled, and the construction cost of continuous tubing operation is high are avoided. In this way, a tubing sandblasting perforating sand filling annulus fracturing technology becomes the multi-stage fracturing technology which is low in cost and risk and high in efficiency.
Description
Technical field
The invention belongs to exploration of oil and gas field and development field, be specifically related to a kind of horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology.
Background technology
Conventional levels well separate stratum fracfturing at present, hydraulic jetting fracturing tubular column structure, from top to bottom for oil pipe, safety are given up, spray gun, packer, ball-and-seat, eye pipe, guiding plug, need to be lowered to packer, in work progress, owing to being subject to the impact in its application life, conventionally after 2 ~ 3 sections of pressure breaks, need to change drilling tool, and the down hole problems such as bit freezing occur often.
Back-up sand separate stratum fracfturing, can improve drilling tool application life, avoid the generation of lock of tool drilling, by investigation, recent year horizontal well back-up sand technique, what mainly adopt is not open flow replacement back-up sand of horizontal well, and support continuous oil pipe operation, major defect is the bad control of sand plug height, usually needs to repair sand face or supplementary back-up sand, if sand-pack height is inadequate, owing to not carrying out open flow operation, probably occur that stratum fluid takes the phenomenon of sand body out of, thereby cause back-up sand failure, and continuous oil pipe operation construction cost is relatively high.
Summary of the invention
The object of the invention is to solve the bad control of current back-up sand separate stratum fracfturing technique sand plug height, and the relatively high problem of continuous oil pipe operation construction cost.
For this reason, the invention provides a kind of horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology, comprise the following steps:
1) lower drilling tool: safety is given up by being connected with in turn from top to bottom, the oil pipe threading of spray gun, ball-and-seat, the precalculated position by construction pipe down to design, dress well head, and catch ball device at well head dress;
2) jetting operation: drop into steel ball after circulation pit shaft is normal, first paragraph is carried out to hydraulic perforation;
3) pressing crack construction: after hydraulic perforation completes, carry out precompressed and split, press off behind stratum, adjust drilling tool to second segment perforation position, dress well head, the steel ball that recoils out, carries out fracturing work to first paragraph target zone;
4) back-up sand operation: closing well after pressure break completes, control open flow, after open flow finishes, by pump truck, the dense water carrier of height is pumped into in well, to carry out back-up sand operation qualified to back-up sand pressure testing;
5) after first paragraph has been constructed, drop into steel ball and carry out second segment abrasive perforating and precompressed program, circulate repeatedly, until complete the pressing crack construction of whole mouthful of well.
High dense water carrier described in step 4), sand concentration is 450 ~ 700kg/m
3, sand amount is 2 ~ 3m
3.
The infusion discharge capacity of high dense water carrier described in step 4) is 1.5 ~ 2.5m
3/ min reduces pump truck output discharge capacity to 1m when load fluid goes out spray gun soon
3/ min, and close the high pressure cock being connected on sleeve gate, carry out height and be pressed into.
Qualified being judged as of the pressure testing of back-up sand described in step 4): when casing pressure reaches 35MPa, by control infusion discharge capacity maintainance set, being pressed in 35MPa left and right builds the pressure 3-4 time, termination of pumping immediately when casing pressure surpasses 45MPa, when being less than 1MPa/min, pressure drop proves that back-up sand is qualified, otherwise continue high being pressed into, until pressure drop is qualified.
The operation of back-up sand described in step 4), when when filling out, envelope section is greater than 1.5 times of oil pipe volumes or oil pipe volume is less than 6 m
3, can carry out at twice back-up sand.
Described sand is 20 ~ 40 object quartz sands.
What the present invention was different from conventional horizontal well packer separate stratum fracfturing technique is, this technique is by being lowered to simple instrument, from top to bottom for oil pipe, safety are given up, spray gun, ball-and-seat, thereby realizing the mechanical separate stratum fracfturing of change is oil pipe back-up sand separate stratum fracfturing, avoid the bad control of sand plug height, and the problem that continuous oil pipe operation construction cost is relatively high, makes oil pipe abrasive perforating back-up sand annular fracturing technology become that cost is low, risk is little and the much higher level of efficiency fracturing technique.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is oil pipe back-up sand fracture drill structural representation of the present invention.
Description of reference numerals: 1, sleeve pipe; 2, oil pipe; 3, safety is given up; 4, spray gun; 5, ball-and-seat.
The specific embodiment
For the construction reliability of the well separate stratum fracfturing of improving the standard, reduce construction risk, reduce operating cost, shorten construction period, the invention provides a kind of horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology, comprise the following steps:
1) lower drilling tool: safety gives up 3 by being connected with in turn from top to bottom, oil pipe 2 threadings 1 of spray gun 4, ball-and-seat 5, the precalculated position by construction pipe down to design, dress well head, and catch ball device at well head dress, as shown in Figure 1;
2) jetting operation: drop into steel ball after circulation pit shaft is normal, first paragraph is carried out to hydraulic perforation;
3) pressing crack construction: after hydraulic perforation completes, carry out precompressed and split, press off behind stratum, adjust drilling tool to second segment perforation position, dress well head, the steel ball that recoils out, carries out fracturing work to first paragraph target zone;
4) back-up sand operation: closing well after pressure break completes, control open flow, after open flow finishes, by 2 2000 type pump trucks, the dense water carrier of height is pumped in well, sand concentration is controlled at 450 ~ 700kg/m
3, use 20 ~ 40 order quartz sands, quartz sand amount is controlled at 2 ~ 3m
3between, infusion discharge capacity 1.5 ~ 2.5m
3/ min reduces pump truck output discharge capacity to 1m when load fluid goes out spray gun 4 soon
3/ min, and close the high pressure cock being connected on sleeve gate, carry out height and be pressed into, when sleeve pipe 1 pressure reaches 35Mpa, by control infusion discharge capacity, keep sleeve pipe 1 pressure to be no more than 45MPa left and right and build the pressure 3 ~ 4 times, termination of pumping immediately when sleeve pipe 1 pressure (or casing pressure) surpasses 45MPa, observe pressure drop, if when pressure drop is less than 1MPa/min, prove that back-up sand is qualified, otherwise continue high being pressed into, until pressure drop is qualified;
Back-up sand operation can be carried out by back-up sand infusion program list, if fill out envelope section, is greater than 1.5 times of oil pipe 2 volumes or oil pipe 2 volumes and is less than 6 m
3, back-up sand at twice;
Back-up sand infusion program list
5) after first paragraph has been constructed, drop into steel ball and carry out second segment abrasive perforating and precompressed program, circulate repeatedly, until complete the pressing crack construction of whole mouthful of well.
Carried out horizontal well jetting back-up sand packing pressure break to the flat 99-5 well of water horizontal well wood of long celebrating oilfield branch the second oil recovery factory in August, 2014, and field test results is good.Test adopts two bunch hydraulic jetting fracturing drilling tools, from top to bottom for oil pipe 2, safety give up 3, spray gun 4, and oil pipe 2, spray gun 4, ball seat, two spray guns 4 all comprise 4 6mm nozzles, and ball seat is ball-and-seat 5 after throwing steel ball, and experimentation is as follows:
(1) first paragraph abrasive perforating, normal sand fracturing
With clear water hydraulic jet perforation first paragraph: 3391.14 m, 3401.13m, add sand 7128kg(4.6m
3), silt concertation 147.4kg/m
3(sand is than 9.1%), discharge capacity 1.2 ~ 2.3m
3/ min, maximum pressure 58.0Mpa, sprays total liquid measure 130.0m
3.After injection, press off smoothly stratum, fracture pressure: oil pipe 2 pressure (or oil pressure) 47.6Mpa, casing pressure 34.3Mpa.
Adjust drilling tool position to second segment pressure break position 3310.24m, 3320.27m, uses active water 12.0m
3, 0.8m
3the anti-circulating flushing of discharge capacity of/min goes out steel ball.
With guanidine glue, first paragraph is carried out to sand fracturing, oil jacket annular space adding ceramic 20.0m
3, operating pressure: oil pressure 32.1MPa, casing pressure 22.3MPa, termination of pumping pressure: oil pressure 14.6MPa, casing pressure 14.7MPa; Work discharge capacity: oil pipe 1.2m
3/ min, sleeve pipe 2.8m
3/ min, silt concertation 307.1kg/m
3(sand is than 18.7%), prepad fluid: oil pipe 18.3m
3, sleeve pipe 35.6m
3; Load fluid: oil pipe 51.8m
3, sleeve pipe 107.2m
3; Displacement fluid: oil pipe 12.6m
3, sleeve pipe 29.3m
3, enter the total liquid measure in ground: oily 82.6m
3, cover 172.1m
3.Closing well 50min after pressing, controls open flow 60min, fluid 20.0m with 10mm oil nozzle
3, gate standard-sized sheet open flow 120min, fluid 90.0m
3.
(2) back-up sand operation
Clear water 7m
3, discharge capacity 0.5 ~ 2m
3/ min, maximum pressure 21Mpa, it is normal that sleeve pipe returns water; Oil pipe injects water carrier, the dense 480kg/ m of STOL
3, inject 2.3m
3quartz sand, discharge capacity 2m
3/ min, closes cover and puts cock, falls discharge capacity to 1.2m
3/ min, oil pipe filling liquid 10.3 m
3, casing pressure rises to 44.6Mpa, and after termination of pumping, decline 8Mpa in pressure 1Min, is just squeezing pressure measurement through 4 sub-high pressures and is falling, decline 0.8Mpa in pressure 1Min, back-up sand success.
(3) second segment abrasive perforating, pre-pressure break
Drop into steel ball, use clear water hydraulic jet perforation second segment: 3310.24m, 3320.27m, adds sand 8100kg(5.0m
3), silt concertation 144.1kg/m
3(sand is than 8. 9%), discharge capacity 1.2 ~ 2.4m
3/ min, maximum pressure 57.4Mpa, sprays total liquid measure 120.0m
3.AEI After End of Injection carries out precompressed, presses off smoothly stratum, fracture pressure: oil pressure 54.6MPa, casing pressure 32.5MPa, broken pressure obviously.
In sum, with this fracturing technology, can meet horizontal well separate stratum fracfturing completely, and compare packer and coiled tubing back-up sand separate stratum fracfturing, risk is less, and cost is cheaper.
In the present embodiment, after input steel ball, ball seat plays the effect of ball-and-seat 5, and direct flushing prepad fluid, displacement fluid, high positive pressure squeeze and all use clear water.
More than exemplifying is only to illustrate of the present invention, does not form the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention all belongs to protection scope of the present invention.The construction operation method that the present embodiment does not describe in detail belongs to the known technology of the industry, here not narration one by one.
Claims (6)
1. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology, is characterized in that, comprises the following steps:
1) lower drilling tool: will be connected with from top to bottom that safety is given up (3) in turn, spray gun (4), ball-and-seat (5), oil pipe (2) threading (1), the precalculated position by construction pipe down to design, dress well head, and catch ball device at well head dress;
2) jetting operation: drop into steel ball after circulation pit shaft is normal, first paragraph is carried out to hydraulic perforation;
3) pressing crack construction: after hydraulic perforation completes, carry out precompressed and split, press off behind stratum, adjust drilling tool to second segment perforation position, dress well head, the steel ball that recoils out, carries out fracturing work to first paragraph target zone;
4) back-up sand operation: closing well after pressure break completes, control open flow, after open flow finishes, by pump truck, the dense water carrier of height is pumped into in well, to carry out back-up sand operation qualified to back-up sand pressure testing;
5) after first paragraph has been constructed, drop into steel ball and carry out second segment abrasive perforating and precompressed program, circulate repeatedly, until complete the pressing crack construction of whole mouthful of well.
2. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology according to claim 1, is characterized in that: high dense water carrier described in step 4), sand concentration is 450 ~ 700kg/m
3, sand amount is 2 ~ 3m
3.
3. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology according to claim 1, is characterized in that: the infusion discharge capacity of high dense water carrier described in step 4) is 1.5 ~ 2.5m
3/ min reduces pump truck output discharge capacity to 1m when load fluid goes out spray gun (4) soon
3/ min, and close the high pressure cock being connected on sleeve gate, carry out height and be pressed into.
4. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology according to claim 1, it is characterized in that: qualified being judged as of the pressure testing of back-up sand described in step 4): when casing pressure reaches 35MPa, by control infusion discharge capacity maintainance set, being pressed in 35MPa left and right builds the pressure 3 ~ 4 times, termination of pumping immediately when casing pressure surpasses 45MPa, when being less than 1MPa/min, pressure drop proves that back-up sand is qualified, otherwise continue high being pressed into, until pressure drop is qualified.
5. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology according to claim 1, is characterized in that: the operation of back-up sand described in step 4), is greater than 1.5 times of oil pipe (2) volume or oil pipe (2) volume and is less than 6 m when filling out envelope section
3, can carry out at twice back-up sand.
6. horizontal well jetting oil pipe back-up sand layered multi-stage fracturing technology according to claim 2, is characterized in that: described sand is 20 ~ 40 object quartz sands.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410423387.1A CN104153752A (en) | 2014-08-26 | 2014-08-26 | Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well |
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| CN201410423387.1A CN104153752A (en) | 2014-08-26 | 2014-08-26 | Hydraulic jetting tubing sand filling stratified multi-stage fracturing technology for horizontal well |
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| CN104948145A (en) * | 2015-05-14 | 2015-09-30 | 胜利油田康贝石油工程装备有限公司 | Construction method for filling gravel in horizontal oil well pipe |
| CN106869893A (en) * | 2017-03-16 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string |
| CN108301818A (en) * | 2018-01-31 | 2018-07-20 | 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 | A kind of no tool packing efficient staged fracturing method of horizontal well |
| CN109342100A (en) * | 2018-11-29 | 2019-02-15 | 中石化四机石油机械有限公司 | Frac system pressure testing control method |
| CN111594126A (en) * | 2020-06-08 | 2020-08-28 | 中国石油天然气集团有限公司 | Sand-filling layered fracturing method for coiled tubing |
| CN112049593A (en) * | 2020-10-27 | 2020-12-08 | 中国石油天然气集团有限公司 | Long-rod coiled tubing injection tool and use method thereof |
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| US20140102708A1 (en) * | 2012-03-08 | 2014-04-17 | Petrowell Limited | Selective Fracturing System |
| CN202659221U (en) * | 2012-06-07 | 2013-01-09 | 中国石油化工股份有限公司 | Horizontal well fracturing string |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948145A (en) * | 2015-05-14 | 2015-09-30 | 胜利油田康贝石油工程装备有限公司 | Construction method for filling gravel in horizontal oil well pipe |
| CN104948145B (en) * | 2015-05-14 | 2017-12-19 | 胜利油田康贝石油工程装备有限公司 | A kind of oilfield horizontal well cased hole gravel packing construction method |
| CN106869893A (en) * | 2017-03-16 | 2017-06-20 | 中国石油集团渤海钻探工程有限公司 | Perforation/pressure break/packing integrated apparatus and its multistage fracturing process pipe string |
| CN108301818A (en) * | 2018-01-31 | 2018-07-20 | 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 | A kind of no tool packing efficient staged fracturing method of horizontal well |
| CN109342100A (en) * | 2018-11-29 | 2019-02-15 | 中石化四机石油机械有限公司 | Frac system pressure testing control method |
| CN109342100B (en) * | 2018-11-29 | 2021-08-06 | 中石化四机石油机械有限公司 | Fracturing system pressure test control method |
| CN111594126A (en) * | 2020-06-08 | 2020-08-28 | 中国石油天然气集团有限公司 | Sand-filling layered fracturing method for coiled tubing |
| CN112049593A (en) * | 2020-10-27 | 2020-12-08 | 中国石油天然气集团有限公司 | Long-rod coiled tubing injection tool and use method thereof |
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Application publication date: 20141119 |
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