CN202108493U - Water jetting multi-cluster subsection fracturing strings of horizontal well - Google Patents

Water jetting multi-cluster subsection fracturing strings of horizontal well Download PDF

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Publication number
CN202108493U
CN202108493U CN2011201692853U CN201120169285U CN202108493U CN 202108493 U CN202108493 U CN 202108493U CN 2011201692853 U CN2011201692853 U CN 2011201692853U CN 201120169285 U CN201120169285 U CN 201120169285U CN 202108493 U CN202108493 U CN 202108493U
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China
Prior art keywords
horizontal well
cluster
fracturing
oil pipe
packer
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CN2011201692853U
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Chinese (zh)
Inventor
任勇
冉新权
朱天寿
赵振峰
李宪文
邵媛
冯长青
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中国石油天然气股份有限公司
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Priority to CN2011201692853U priority Critical patent/CN202108493U/en
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Publication of CN202108493U publication Critical patent/CN202108493U/en

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Abstract

A water jetting multi-cluster subsection fracturing strings of a horizontal well is applied to fracturing construction of oil fields and oil wells. A first water ejector is connected at the lower end of an oil pipe which is connected on the lower portion of a safety joint, and two to five water ejectors are connected at the lower end of the first water ejector through the oil pipe. A k344 packer is connected at the lower end of the water ejector at the lowest position though an oil pipe short section, a uniflow valve is connected at the lower end of the k344 packer, a screen pipe is connected at the lower end of the uniflow valve and a guide pipe plug is connected at the lower end of the screen pipe. The water jetting multi-cluster subsection fracturing strings of the horizontal well has the advantages that one perforation fracturing construction can form multi-cluster cracks, and one string can continuously perform construction for three to four times, thereby improving modified effect of a lower-permeation storage layer.

Description

Many bunches of staged fracturing tubing strings of horizontal well jetting
Technical field
The utility model relates to oilfield pressing crack construction technical field, and particularly low permeability reservoir oilfield horizontal well staged fracturing is transformed tubing string, is suitable for the horizontal well that stratum middle sleeve completion is relatively grown in the crack.
Background technology
At present, the oilfield horizontal well staged fracturing mainly contains open hole packer, bridging plug, two envelope single deck tape-recorder drags and technology such as jetting.Because jetting staged fracturing technology beam hole pressure break is an one, has advantages such as technology is simple, efficiency of construction is high, risk is low, in the oilfield reservoir transformation, obtained using widely.Research shows, for the low permeability oil field horizontal well, introduces " volume pressure break " theory, need carry out many bunches of transformations of horizontal well in segments with further raising correctional effect.And the jetting fracturing string in early stage can only realize that a perforating and fracturing construction produces a crack.Therefore, in order to satisfy the needs of many bunches of fracturing reforms of low permeability oil field horizontal well in segments, many bunches of fracturing strings of novel horizontal well jetting segmentation have been designed.A perforating and fracturing construction of this tubing string can form two or three cracks, realizes all interval pressure breaks through dragging tubing string, thereby has improved efficiency of construction and horizontal well correctional effect.
The utility model content
The purpose of the utility model is: provide a kind of horizontal well jetting many bunches of staged fracturing tubing strings, be connected with two or more ejectors and k344 packer packing at a distance from reservoir, satisfy the technological requirement of many bunches of oilfield horizontal well segmentations, be suitable for the horizontal well of cased hole completion.
The technical scheme that the utility model adopts is: many bunches of staged fracturing tubing strings of horizontal well jetting; Mainly form by oil pipe, safety joint, hydraulic ejector, k344 packer, ball-and-seat, screen casing and a guiding plug; Be connected with safety joint at the oil pipe middle part, the lower end of the oil pipe that connects in the safety joint bottom is connected with hydraulic ejector No. one, and the lower end of a hydraulic ejector connects 2~5 hydraulic ejectors through oil pipe; Lower end at the hydraulic ejector of foot is connected with the k344 packer through tubing nipple; Lower end at the k344 packer connects ball-and-seat, connects screen casing in the lower end of ball-and-seat, connects the guiding plug in the lower end of screen casing.
The use of many bunches of staged fracturing tubing strings of summary horizontal well jetting.At first, logical well-flushing, many bunches of fracturing strings of following horizontal well in segments are to design attitude; Carry out perforation, the fracturing work of first section each bunch.Concrete perforation, fracturing technology are achieved in that
A, hydraulic perforation: in the tubing string lower going-into-well; The nozzle that makes each ejector is over against perforated interval; Inject perforating fluid from oil pipe, through oil pipe, through injector nozzle throttling acceleration; Simultaneously each section carried out perforation, makes seam, operational discharge capacity and well head pressure are confirmed by nozzle quantity, aperture and nozzle and the borehole wall distance of each hydraulic ejector.During perforation, perforating fluid injects from oil pipe, is returned out by oil, cover annular space.
B, jetting pressure break: perforation, press off after the stratum accomplishes, by the discharge capacity of designing requirement, inject load fluid from oil pipe, simultaneously, the oil jacket annular space injects original gelatin each section is carried out pressing crack construction simultaneously, accomplishes first section perforation, pressing crack construction.
After first section operation finished, anti-circulation well cleanup continued upper lifting pipe post to the second and section constructs; Repeat above step, finish up to all the interval transformations of this well.
The beneficial effect of the utility model: many bunches of staged fracturing tubing strings of the utility model horizontal well jetting, a perforating and fracturing construction can form many bunches of cracks, and one-trip string can carry out 3~4 constructions continuously, has improved efficiency of construction and effect of increasing production.The duct and the crack that form have increased the horizontal well drainage area, have improved the development effectiveness of horizontal well.Tubing string has realized that perforating and fracturing is integrated, and is furnished with safety joint, and working security is high, good reliability.
Description of drawings
Fig. 1 is many bunches of staged fracturing tubular column structures of a utility model horizontal well jetting sketch map.
Among the figure: 1-oil pipe 1,2-safety joint, hydraulic ejector of 3-, No. two hydraulic ejectors of 4-, 5-k344 packer, 6-ball-and-seat, 7-screen casing, 8-plug that leads.
The specific embodiment
Embodiment 1: with many bunches of staged fracturing tubing strings of horizontal well jetting that have two ejectors is example, and the utility model is done further explain.
Consult Fig. 1.Many bunches of staged fracturing tubing strings of the utility model horizontal well jetting; Mainly form by oil pipe 1, safety joint 2, hydraulic ejector 3, No. two hydraulic ejectors 4, k344 packer 5, ball-and-seat 6, screen casing 7 and guiding plugs 8; Be connected with safety joint 2 at external upset tubing 1 middle part; The lower end of the external upset tubing 1 that connects in safety joint 2 bottoms is connected with hydraulic ejector 3 No. one; No. one hydraulic ejector 3 connects No. two hydraulic ejectors 4 through external upset tubing 1, is connected with k344 packer 5 in the lower end of No. two hydraulic ejectors 4 through the external upset tubing pipe nipple, connects a ball-and-seat 6 in the lower end of k344 packer 5; Lower end at ball-and-seat 6 connects screen casing 7, connects a guiding plug 8 in the lower end of screen casing 7.
Whether being lowered to needs to measure good each root tubing length in the process, consistent with design attitude with definite injector locations, and both errors should be less than 0.5m, if error is then adjusted tool location through well head increase and decrease adjustment pipe nipple greater than 0.5m; Subsequently, sit fracture well head, start the pressure break unit, big discharge capacity direct flushing carries out hydraulic perforating, and at this moment, two ejectors carry out perforation simultaneously, forms duct separately on the stratum, to guarantee that the stratum is communicated with pit shaft; Then, close sleeve gate rapidly, press off the stratum after, improve discharge capacity rapidly, pressurization in the hole that forms by means of high-speed water jet forms two bunches of cracks, thereby accomplishes the pressing crack construction of this section; After treating that for the first time pressure break finishes, closing well, open flow, treat that pressure descends after, the anti-hole volume of bad well-flushing that follows of control discharge capacity, when returning fluid's body did not have sand grains, well head was unloaded in termination of pumping, upper lifting pipe post to the second section is proceeded perforating and fracturing construction, formation amount bunch crack; At last, repeat preceding step, finish, trip out fracturing string, be lowered to sand washing suction formation testing tubing string up to all the interval transformations of this well.

Claims (1)

1. many bunches of staged fracturing tubing strings of a horizontal well jetting; Mainly form by oil pipe (1), safety joint (2), a hydraulic ejector (3), k344 packer (5), ball-and-seat (6), screen casing (7) and guiding plug (8); Be connected with safety joint (2) at oil pipe (1) middle part; It is characterized in that: the lower end of the oil pipe (1) that connects in safety joint (2) bottom is connected with a hydraulic ejector (3); The lower end of a hydraulic ejector (3) connects 2~5 hydraulic ejectors through oil pipe (1), is connected with k344 packer (5) in the lower end of the hydraulic ejector of foot through tubing nipple, connects ball-and-seat (6) in the lower end of k344 packer (5); Lower end at ball-and-seat (6) connects screen casing (7), connects guiding plug (8) in the lower end of screen casing (7).
CN2011201692853U 2011-05-25 2011-05-25 Water jetting multi-cluster subsection fracturing strings of horizontal well CN202108493U (en)

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Application Number Priority Date Filing Date Title
CN2011201692853U CN202108493U (en) 2011-05-25 2011-05-25 Water jetting multi-cluster subsection fracturing strings of horizontal well

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606124A (en) * 2012-03-16 2012-07-25 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 Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells
CN102641802A (en) * 2012-04-28 2012-08-22 苏州市金翔钛设备有限公司 Portable hydraulic ejector
CN102691495A (en) * 2012-05-18 2012-09-26 中国石油天然气股份有限公司 High-broken-pressure stratum horizontal well sectional-fracturing method for well cementation and completion of casing
CN102877824A (en) * 2012-09-29 2013-01-16 中国石油天然气股份有限公司 Horizontal well staged and multi-cluster fracturing method by hydraulic jetting
CN103470241A (en) * 2013-08-21 2013-12-25 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 Dual-cluster hydraulic jet tubular column and dual-cluster hydraulic jet annulus fracturing method
CN104563997A (en) * 2013-10-29 2015-04-29 中国石油天然气股份有限公司 Water-jet and bridge plug combined process tubing string and work thereof
CN104632167A (en) * 2013-11-08 2015-05-20 中国石油天然气股份有限公司 Hydraulic jet double-seal single-blockage perforation and fracturing integrated process pipe string
CN104632168A (en) * 2013-11-15 2015-05-20 中国石油天然气股份有限公司 Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method
CN105358793A (en) * 2013-07-04 2016-02-24 Ior加拿大有限公司 Improved hydrocarbon recovery process exploiting multiple induced fractures
CN106089158A (en) * 2016-08-29 2016-11-09 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 horizontal well is every adopting tubing string and every mining method
CN109577925A (en) * 2017-09-28 2019-04-05 中国石油天然气股份有限公司 The more cluster fracturing strings of more cluster spray guns, hydraulic jet perforation and technique

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606124A (en) * 2012-03-16 2012-07-25 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 Sectioned multi-cluster synchronous volume fracturing technology for double horizontal wells
CN102606124B (en) * 2012-03-16 2015-07-29 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 The synchronous volume fracturing technology of dual horizontal well segmentation many bunches
CN102641802A (en) * 2012-04-28 2012-08-22 苏州市金翔钛设备有限公司 Portable hydraulic ejector
CN102691495A (en) * 2012-05-18 2012-09-26 中国石油天然气股份有限公司 High-broken-pressure stratum horizontal well sectional-fracturing method for well cementation and completion of casing
CN102877824A (en) * 2012-09-29 2013-01-16 中国石油天然气股份有限公司 Horizontal well staged and multi-cluster fracturing method by hydraulic jetting
CN105358793A (en) * 2013-07-04 2016-02-24 Ior加拿大有限公司 Improved hydrocarbon recovery process exploiting multiple induced fractures
CN103470241A (en) * 2013-08-21 2013-12-25 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 Dual-cluster hydraulic jet tubular column and dual-cluster hydraulic jet annulus fracturing method
CN104563997A (en) * 2013-10-29 2015-04-29 中国石油天然气股份有限公司 Water-jet and bridge plug combined process tubing string and work thereof
CN104632167A (en) * 2013-11-08 2015-05-20 中国石油天然气股份有限公司 Hydraulic jet double-seal single-blockage perforation and fracturing integrated process pipe string
CN104632168A (en) * 2013-11-15 2015-05-20 中国石油天然气股份有限公司 Hydraulic sand blasting perforation large-displacement fracturing technological tubing string and method
CN104632168B (en) * 2013-11-15 2017-10-17 中国石油天然气股份有限公司 A kind of hydraulic jet perforation huge discharge fracturing technology tubing string and method
CN106089158A (en) * 2016-08-29 2016-11-09 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 horizontal well is every adopting tubing string and every mining method
CN106089158B (en) * 2016-08-29 2018-05-22 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 horizontal well is every adopting tubing string and every mining method
CN109577925A (en) * 2017-09-28 2019-04-05 中国石油天然气股份有限公司 The more cluster fracturing strings of more cluster spray guns, hydraulic jet perforation and technique
CN109577925B (en) * 2017-09-28 2020-12-01 中国石油天然气股份有限公司 Multi-cluster spray gun, hydraulic sand-blasting perforation multi-cluster staged fracturing pipe column and process

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