CN111608633A - Large-scale fracturing process suitable for horizontal well - Google Patents
Large-scale fracturing process suitable for horizontal well Download PDFInfo
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- CN111608633A CN111608633A CN202010618660.1A CN202010618660A CN111608633A CN 111608633 A CN111608633 A CN 111608633A CN 202010618660 A CN202010618660 A CN 202010618660A CN 111608633 A CN111608633 A CN 111608633A
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- stage
- drillable packer
- fracturing
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- 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
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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/122—Multiple string packers
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- 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
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
Abstract
The invention relates to the technical field of oil field oil extraction engineering, and belongs to a large-scale fracturing process suitable for horizontal wells. The invention effectively solves the problems of more clusters, large discharge capacity, large scale and large clamping distance in secondary fracturing construction of the bridge plug fracturing well. Firstly, stringing a pipe column to a designed depth, throwing a soluble ball, setting a first-stage drillable packer, lifting the pipe column to a target layer, activating a second-stage drillable packer, pressing the oil pipe to set the drillable packer, and fracturing a first section; releasing the second stage of drillable packer by lifting and releasing the pipe column, activating the third stage of drillable packer and fracturing the second section; lifting and putting the pipe column after fracturing to complete releasing of the third stage drillable packer, and simultaneously activating the fourth stage drillable packer to fracture the third stage; by analogy, eight stages of fracturing construction can be completed at present. The invention has the advantages of more fracturing construction clusters, large displacement, large scale, large clamping distance, high construction efficiency and the like.
Description
Technical Field
The invention relates to the technical field of oil field oil extraction engineering, and belongs to a large-scale fracturing process suitable for horizontal wells.
Background
The quantity of compact oil resources in Daqing oil fields is 12.7 hundred million tons, wherein the quantity of unused compact oil resources reaches 7.58 hundred million tons, and the potential is huge. The primary fracturing is influenced by the construction technology level, the single-cluster sand adding scale of the initial construction of the compact oil horizontal well is small, longitudinal layer-crossing transformation is not considered, and the transformation volume maximization is not realized; meanwhile, the distance between partial clusters is too large, so that the mobility degree of partial reservoirs is low. Therefore, repeated fracturing is currently required to increase single well productivity. Because most wells in the early stage adopt a bridge plug fracturing mode, two-section or multi-section combined fracturing can be carried out according to reservoir conditions during repeated fracturing, so that the clamping distance is large, the cluster number in a fracturing section is large, fracturing construction needs to be carried out in a large scale at large displacement, the displacement and scale of the conventional process are limited, the requirement on fracturing transformation effect cannot be met, and the capacity of compact oil is influenced.
Disclosure of Invention
The invention aims to realize the advantages of more fracturing construction clusters, large discharge capacity, large scale, large clamping distance, safety, stability and environmental protection, and can reduce the cost and effectively develop the large-scale fracturing process suitable for the horizontal well.
The invention is realized by the following devices: the device consists of a safety joint, a hydraulic anchor, a fourth-stage drillable packer, a third-stage drillable packer, a second-stage drillable packer, a first-stage drillable packer and a dead plug; wherein the top of the dead plug at the bottom end is sequentially connected with a fourth-stage drillable packer, a third-stage drillable packer, a second-stage drillable packer, a first-stage drillable packer, a hydraulic anchor and a safety joint; the large-scale fracturing process suitable for the horizontal well is realized by the following steps:
a. firstly, connecting pipe columns in series and putting the pipe columns into a well;
b. setting a first stage drillable packer by throwing a soluble ball, opening a releasing device while setting the packer, then lifting the pipe column to the upper part of a target layer, and activating a second stage drillable packer;
c. the oil pipe is pressed to set the second stage drillable packer, and then the first section is fractured; releasing the second-stage drillable packer by lifting and lowering the pipe column after fracturing, and activating a third-stage drillable packer;
d. then putting a soluble ball, and fracturing the second section after the soluble ball is seated in the second-stage drillable packer; after fracturing, releasing the third-stage drillable packer by lifting and lowering the pipe column, and activating the fourth-stage drillable packer;
e. then putting a soluble ball, and fracturing a third section after the soluble ball is seated in a third-stage drillable packer; by analogy, eight stages of fracturing construction can be completed at present;
f. after the construction is finished, the soluble ball can be directly put into production after being dissolved, and a drilling plug tool can also be put into production after the fourth-stage drillable packer, the third-stage drillable packer, the second-stage drillable packer and the first-stage drillable packer are all drilled.
Compared with the prior art, the invention has the following advantages:
the invention aims to effectively solve the problems of more clusters, large discharge capacity, large scale and large clamping distance in secondary fracturing construction similar to bridge plug fracturing wells. The fracturing construction method has the advantages of multiple clusters, large discharge capacity, large scale, large clamping distance, safety, stability and environmental protection, reduces cost and realizes effective development.
Drawings
Fig. 1 is a schematic diagram of the field application of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings: the invention is realized by the following devices: the device consists of a safety joint 1, a hydraulic anchor 2, a fourth-stage drillable packer 3, a third-stage drillable packer 4, a second-stage drillable packer 5, a first-stage drillable packer 6 and a dead plug 7; wherein, the dead plug 7 at the bottom end is sequentially connected with a fourth-stage drillable packer 6, a third-stage drillable packer 5, a second-stage drillable packer 4, a first-stage drillable packer 3, a hydraulic anchor 2 and a safety joint 1; the large-scale fracturing process suitable for the horizontal well is realized by the following steps:
a. firstly, connecting pipe columns in series and putting the pipe columns into a well;
b. setting the first stage drillable packer 6 by throwing a soluble ball, opening the releasing device while setting the packer, then lifting the pipe column to the upper part of a target layer, and activating the second stage drillable packer 5;
c. the oil pipe is pressed to set the second stage drillable packer 5, and then the first stage is fractured; after fracturing, releasing the second-stage drillable packer 5 by lifting and releasing the pipe column, and activating the third-stage drillable packer 4;
d. then putting a soluble ball, and fracturing the second section after the ball is seated into the second-stage drillable packer 5; after fracturing, releasing the third-stage drillable packer 4 by lifting and releasing the pipe column, and activating the fourth-stage drillable packer 3;
e. then putting a soluble ball, and fracturing a third section after the soluble ball is seated in the third-stage drillable packer 4;
f. after the construction is finished, the soluble ball can be directly put into production after being dissolved, and a drilling plug tool can also be put into production after the fourth-stage drillable packer 3, the third-stage drillable packer 4, the second-stage drillable packer 5 and the first-stage drillable packer 6 are all drilled.
Claims (1)
1. A large-scale fracturing process suitable for horizontal wells is realized by the following devices: the device consists of a safety joint (1), a hydraulic anchor (2), a fourth-stage drillable packer (3), a third-stage drillable packer (4), a second-stage drillable packer (5), a first-stage drillable packer (6) and a dead plug (7); wherein the dead plug (7) at the bottommost end is sequentially connected with a fourth-stage drillable packer (6), a third-stage drillable packer (5), a second-stage drillable packer (4), a first-stage drillable packer (3), a hydraulic anchor (2) and a safety joint (1); the method is characterized in that: the large-scale fracturing process suitable for the horizontal well is realized by the following steps:
a. firstly, connecting pipe columns in series and putting the pipe columns into a well;
b. setting a first stage drillable packer (6) by throwing a soluble ball, opening a releasing device while setting the packer, then lifting the pipe column to the upper part of a target layer, and simultaneously activating a second stage drillable packer (5);
c. the oil pipe is pressed to set a second stage drillable packer (5), and then the first section is fractured; releasing the second-stage drillable packer (5) by lifting and lowering the tubular column after fracturing, and activating the third-stage drillable packer (4);
d. then putting a soluble ball, and fracturing the second section after the soluble ball is seated into the second-stage drillable packer (5); releasing the third-stage drillable packer (4) by lifting and releasing the pipe column after fracturing, and activating the fourth-stage drillable packer (3);
e. then putting a soluble ball, and fracturing a third section after the soluble ball is seated in a third-stage drillable packer (4); by analogy, eight stages of fracturing construction can be completed at present;
f. after the construction is finished, the soluble ball can be directly put into production after being dissolved, and a drilling plug tool can also be put into production after the fourth-stage drillable packer (3), the third-stage drillable packer (4), the second-stage drillable packer (5) and the first-stage drillable packer (6) are all drilled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618660.1A CN111608633A (en) | 2020-06-30 | 2020-06-30 | Large-scale fracturing process suitable for horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010618660.1A CN111608633A (en) | 2020-06-30 | 2020-06-30 | Large-scale fracturing process suitable for horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111608633A true CN111608633A (en) | 2020-09-01 |
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| CN202010618660.1A Pending CN111608633A (en) | 2020-06-30 | 2020-06-30 | Large-scale fracturing process suitable for horizontal well |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030121663A1 (en) * | 2001-12-31 | 2003-07-03 | Xiaowei Weng | Method and apparatus for placement of multiple fractures in open hole wells |
| CN201412133Y (en) * | 2009-06-02 | 2010-02-24 | 中国石油天然气股份有限公司 | Pipe string for multi-stage drag fracturing of horizontal well |
| CN102022104A (en) * | 2010-11-06 | 2011-04-20 | 大庆油田有限责任公司 | Open-hole packer for open-hole horizontal well and preset connector fracturing well completion method |
| CN201802376U (en) * | 2010-09-07 | 2011-04-20 | 中国石油天然气股份有限公司 | Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string |
| US20110139456A1 (en) * | 2009-07-20 | 2011-06-16 | Conocophillips Company | Controlled Fracture Initiation Stress Packer |
| CN103032060A (en) * | 2012-11-08 | 2013-04-10 | 中国石油天然气股份有限公司 | Continuous oil pipe hydraulic sanding blasting multi-cluster perforation annular sanding staged fracturing process for horizontal well |
| CN203961938U (en) * | 2014-05-23 | 2014-11-26 | 中国石油化工股份有限公司 | Packer staged fracturing technology tube pillar in a kind of horizontal well tube |
| CN104314546A (en) * | 2014-09-23 | 2015-01-28 | 中国石油天然气股份有限公司 | Staged fracturing completion string in horizontal well casing and staged fracturing process |
| CN109723406A (en) * | 2019-03-06 | 2019-05-07 | 武汉市欧赛石油技术开发有限公司 | A kind of method of oilfield horizontal well ball-throwing type sliding sleeve block switch |
| CN110671058A (en) * | 2019-09-10 | 2020-01-10 | 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 | Double-sealing single-clamping process pipe column of old horizontal well and method for realizing large-discharge transformation |
-
2020
- 2020-06-30 CN CN202010618660.1A patent/CN111608633A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030121663A1 (en) * | 2001-12-31 | 2003-07-03 | Xiaowei Weng | Method and apparatus for placement of multiple fractures in open hole wells |
| CN201412133Y (en) * | 2009-06-02 | 2010-02-24 | 中国石油天然气股份有限公司 | Pipe string for multi-stage drag fracturing of horizontal well |
| US20110139456A1 (en) * | 2009-07-20 | 2011-06-16 | Conocophillips Company | Controlled Fracture Initiation Stress Packer |
| CN201802376U (en) * | 2010-09-07 | 2011-04-20 | 中国石油天然气股份有限公司 | Barefoot well completion hydraulic power sand blast immovable pipe column staged fracturing string |
| CN102022104A (en) * | 2010-11-06 | 2011-04-20 | 大庆油田有限责任公司 | Open-hole packer for open-hole horizontal well and preset connector fracturing well completion method |
| CN103032060A (en) * | 2012-11-08 | 2013-04-10 | 中国石油天然气股份有限公司 | Continuous oil pipe hydraulic sanding blasting multi-cluster perforation annular sanding staged fracturing process for horizontal well |
| CN203961938U (en) * | 2014-05-23 | 2014-11-26 | 中国石油化工股份有限公司 | Packer staged fracturing technology tube pillar in a kind of horizontal well tube |
| CN104314546A (en) * | 2014-09-23 | 2015-01-28 | 中国石油天然气股份有限公司 | Staged fracturing completion string in horizontal well casing and staged fracturing process |
| CN109723406A (en) * | 2019-03-06 | 2019-05-07 | 武汉市欧赛石油技术开发有限公司 | A kind of method of oilfield horizontal well ball-throwing type sliding sleeve block switch |
| CN110671058A (en) * | 2019-09-10 | 2020-01-10 | 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 | Double-sealing single-clamping process pipe column of old horizontal well and method for realizing large-discharge transformation |
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Application publication date: 20200901 |