CN106437666A - Novel technology for igniting specific explosive for explosive fracturing in oil and gas reservoir - Google Patents
Novel technology for igniting specific explosive for explosive fracturing in oil and gas reservoir Download PDFInfo
- Publication number
- CN106437666A CN106437666A CN201611027835.1A CN201611027835A CN106437666A CN 106437666 A CN106437666 A CN 106437666A CN 201611027835 A CN201611027835 A CN 201611027835A CN 106437666 A CN106437666 A CN 106437666A
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- Prior art keywords
- explosive
- oil
- fracturing
- petroleum
- gas reservoir
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- 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.)
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Classifications
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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
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
Abstract
The invention relates to a novel technology for igniting specific explosive for explosive fracturing in an oil and gas reservoir in the technology of yield increase of petroleum natural gas. According to the scheme, the novel technology comprises the following steps: firstly pressing a preset amount of specific explosive for explosive fracturing in the oil and gas reservoir into a main crack formed by hydraulic fracturing; pressing a preset amount of quick set spacer fluid into the main crack; circularly flushing the well section; lifting a tubular column carrying small-bore deep-penetration petroleum perforating bullet to an explosive fracturing target layer section, adjusting the perforating phase to the same perforating phase position as first perforation completion, and igniting the petroleum bullet by pressurizing at the well opening; impacting to ignite the specific explosive for explosive fracturing in the main crack after high-speed metal jet formed after petroleum perforating bullet explosion runs through the quick set spacer fluid (layer). The ignition technology is applicable to ignition of specific explosive for explosive fracturing in the main crack, and the safety of a well shaft and sleeve can be effectively protected since the ignition point is positioned in the main crack of the oil and gas reservoir.
Description
Technical field
The present invention relates to explosive fracturing special dynamite in a kind of oil and gas reservoir in technology for increasing yield of oil and natural gas
Ignite new technique.
Technical background
Exploding in fracture fracturing technique is to squeeze in oil and gas reservoir exploding in fracture pressure break special dynamite (high explosive)
In some hydraulic fractures, subsequently ignite and the special dynamite in crack ignited, in seam special dynamite instant of detonation formed quick-fried
Fried shock wave and a large amount of high temperature and high pressure gas fracture wall rock produce intense impact and destroy and expand extrusion effect, are formed big
Amount self-supporting destroys crackle, thus effectively improving stratum permeability, and then greatly improves oil and gas reservoir recovery ratio, increases oil gas
Yield.Compared to traditional extensive fracturing, exploding in fracture pressure break belongs to anhydrous pressure break reservoir reconstruction truly
Technology, represents the new developing direction of oil-gas reservoir stimulation technology, and its industrial applications will be fine and close to shale gas etc. oily
The green high-efficient exploitation of gas reservoir and Low Permeability Oil/gas resource produces epoch-making impact.
In oil and gas reservoir, the ignition new technique of explosive fracturing special dynamite is the industrialization realizing exploding in fracture fracturing technique
One of guardian technique of application.This technology can reliably ignite the exploding in fracture pressure break special dynamite in hydraulic fracture, and can have
Effect protection oil gas pit shaft and the safety of tubing and casing.
Content of the invention
The purpose of the present invention is：In order to solve the problems, such as the blasting technology of explosive fracturing special dynamite in oil and gas reservoir, this
A kind of new technique for explosive fracturing special dynamite in ignition oil and gas reservoir safe and reliable in hydraulic fracture of bright offer.
In order to achieve the above object, the present invention employs the following technical solutions：A kind of special for explosive fracturing in oil and gas reservoir
With the new technique of explosive initiation, it is characterized in that：First by the special dynamite pressure being used for explosive fracturing in oil and gas reservoir of scheduled volume
Enter in the major fracture being formed by fracturing in advance, and and then in major fracture press-in scheduled volume to coagulate insulating liquid (layer) soon (fast
Solidifying time h is：60min≤h≤90min)；It is pressed in the 60min after coagulating insulating liquid (layer) soon and complete the circulation of this well section is washed
Well, residual special dynamite in the wellbore and soon solidifying insulating liquid are washed out pit shaft；Small-bore deep penetration petroleum perforation will be carried
The tubing string of rifle string above carries to precalculated position, and the same phase position by its perforation phase adjustment to first time perforation completion, and
Set target interval packer, by well head pressurization, deep penetration petroleum perforation charge in small-bore is ignited；Small-bore deep penetration oil
Perforating bullet blast after formed high-velocity wire jet run through soon coagulate insulating liquid (layer) after will be special for the exploding in fracture pressure break in major fracture
Carry out initiation by impact with explosive.
This technology is related to a kind of new technique ignited for explosive fracturing special dynamite in oil and gas reservoir, it is characterized in that：?
After being pressed into the exploding in fracture pressure break special dynamite of scheduled volume in major fracture, the and then solidifying soon insulating liquid (layer) of press-in scheduled volume,
This coagulates insulating liquid (layer) thickness soon is 500～1000mm, thus the high speed having been formed after both having ensured the blast of deep penetration petroleum perforation charge
Metal jet runs through after this coagulates insulating liquid (layer) soon reliably can be ignited the exploding in fracture pressure break special dynamite in hydraulic fracture, and
Can guarantee that and special dynamite is separated with pit shaft, thus being prevented effectively from the destruction to pit shaft for the special dynamite blast.
This technology is related to a kind of new technique ignited for explosive fracturing special dynamite in oil and gas reservoir, it is characterized in that：Will
The tubing string carrying small-bore deep penetration petroleum oil perforation gun string in advance above carries to explosive fracturing target interval, makes small-bore deep penetration stone
Oily perforating bullet is detonated at the identical perforation phase place of first time perforation completion, shape after the blast of small-bore deep penetration petroleum perforation charge
After the high-velocity wire jet becoming runs through and coagulates insulating liquid soon, exploding in fracture pressure break special dynamite in the major fracture of initiation by impact stratum.
This technology is related to a kind of new technique ignited for explosive fracturing special dynamite in oil and gas reservoir, it is characterized in that：Little
Aperture deep penetration petroleum perforation charge blast after formed high-velocity wire jet, should be able to effectively run through perforation casing, perforating fluid, 500
～1000mm coagulates insulating liquid (layer) soon, and can effective initiation by impact exploding in fracture pressure special dynamite.
The present invention has following beneficial effect：Contraction in Site is simple to operate, ignites reliable；Flashpoint is located at stratum (water
Advocate crack) in, can fundamentally solve reliability in stratum (major fracture) for the exploding in fracture pressure break special dynamite and ignite problem,
Thus effective protection pit shaft and tubing and casing safety.
Brief description
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 be the present invention relates to a kind of in oil and gas reservoir explosive fracturing special dynamite ignite new technique needed for
The field operation construction technology schematic diagram wanted.
In figure：1. explosive fracturing formation at target locations, 2. exploding in fracture pressure break special dynamite, 3. coagulate insulating liquid (layer) soon, 4. solid
Well water mud layer, 5. sleeve pipe；6. the tubing string with perforation casing string, 7. small-bore deep penetration petroleum perforation charge, 8. after perforating bullet blast
Form high-velocity wire jet, 9. explosive charge shock wave；H is to coagulate insulating liquid (layer) thickness soon.
Specific embodiment
With reference to the accompanying drawings shown in 1, a kind of new technique ignited for explosive fracturing special dynamite in oil and gas reservoir, first quick-fried
Successively it is pressed into the exploding in fracture pressure break of scheduled volume in order in major fracture (being formed by fracturing) in fried pressure break formation at target locations 1
Special dynamite 2 and soon solidifying insulating liquid (layer) 3；Well-flushing is circulated to this well section, by residual exploding in fracture pressure break in the wellbore
Special dynamite 2 and soon solidifying insulating liquid 3 wash out pit shaft；Tubing string 6 with perforation casing string is above carried to explosive fracturing target interval,
And the identical perforation phase position by perforation phase adjustment to first time perforation completion, set the packing of explosive fracturing target interval
Small-bore deep penetrating charge 7 is ignited by device by well head pressurization；Formed after small-bore deep penetration petroleum perforation charge 7 blast
After high-velocity wire jet 8 runs through perforation casing, sleeve pipe 5 first and coagulates insulating liquid (layer) 3 soon, by the layer in formation at target locations major fracture
Interior explosive fracturing special dynamite 2 carries out initiation by impact；Exploding in fracture pressure break special dynamite 2 is detonated tailing edge crack depths propagation of explosion,
And form explosion wave 9, finally realize the ignition to exploding in fracture pressure break special dynamite.
Claims (4)
1. a kind of ignition new technique for explosive fracturing special dynamite in oil and gas reservoir, is characterized in that：Hydraulic fracture is pressed
Enter the exploding in fracture pressure break special dynamite 2 of scheduled volume and coagulate insulating liquid (layer) 3 soon, the pipe of upper belt perforating gun string after the completion of well-flushing
Post, to explosive fracturing target interval, ignites small-bore deep penetration petroleum perforation charge 7, and the exploding in fracture pressure break in the major fracture of stratum is special
It is detonated under the percussion forming high-velocity wire jet 8 after deep penetration petroleum perforation charge 7 blast with explosive 2.
2. the ignition new technique for explosive fracturing special dynamite in oil and gas reservoir according to claim 1, is characterized in that：
After the exploding in fracture pressure break special dynamite 2 of press-in scheduled volume, the and then solidifying soon insulating liquid (layer) 3 of press-in scheduled volume, it is thick
Degree H is 500～1000mm, and this forms solid sealing coat after coagulating insulating liquid (layer) 3 solidification soon, has both ensured deep penetration petroleum perforation charge
The high-velocity wire jet being formed after blast runs through can be special by the exploding in fracture pressure break in hydraulic fracture after this coagulates insulating liquid (layer) 3 soon
Ignited with explosive 2 is reliable, can guarantee that again and exploding in fracture pressure break special dynamite 2 is separated with pit shaft, thus being prevented effectively from specially
With the destruction to pit shaft for the explosive charge.
3. the ignition new technique for explosive fracturing special dynamite in oil and gas reservoir according to claim 1, is characterized in that：
After the completion of well-flushing, the tubing string 6 of upper belt small-bore deep penetration petroleum oil perforation gun string is to explosive fracturing target interval, and by its perforation
Phase adjustment, to the identical perforation phase position of first time perforation completion, and sets target interval packer, is pressurizeed by well head
Ignite small-bore deep penetration petroleum perforation charge 7, the high-velocity wire jet 8 being formed after small-bore deep penetration petroleum perforation charge 7 blast
Run through the exploding in fracture pressure break special dynamite 2 after coagulating insulating liquid (layer) 3 soon, in the major fracture of initiation by impact stratum.
4. the ignition new technique for explosive fracturing special dynamite in oil and gas reservoir according to claim 1, is characterized in that：
The high-velocity wire jet 8 being formed after small-bore deep penetration petroleum perforation charge 7 blast, should be able to effectively run through perforating gun tubing string 6, perforation
Liquid, 500～1000mm coagulate insulating liquid (layer) 3 soon, and can effective initiation by impact exploding in fracture pressure special dynamite 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027835.1A CN106437666A (en) | 2016-11-18 | 2016-11-18 | Novel technology for igniting specific explosive for explosive fracturing in oil and gas reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611027835.1A CN106437666A (en) | 2016-11-18 | 2016-11-18 | Novel technology for igniting specific explosive for explosive fracturing in oil and gas reservoir |
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| Publication Number | Publication Date |
|---|---|
| CN106437666A true CN106437666A (en) | 2017-02-22 |
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ID=58220862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611027835.1A Pending CN106437666A (en) | 2016-11-18 | 2016-11-18 | Novel technology for igniting specific explosive for explosive fracturing in oil and gas reservoir |
Country Status (1)
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| CN (1) | CN106437666A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252702A (en) * | 2018-02-06 | 2018-07-06 | 西安石油大学 | The oil and gas reservoir volume remodeling method of seam in a kind of seam |
| CN110965979A (en) * | 2019-10-24 | 2020-04-07 | 中国石油大学(华东) | Deep combustion and explosion fracturing method in radial slim hole |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129276A (en) * | 1995-02-14 | 1996-08-21 | 史慧生 | Perforation and fracturing device for oil well |
| CN1324979A (en) * | 1999-12-17 | 2001-12-05 | 中国科学院力学研究所 | Explosion treating method for oil layer in oil field |
| CN2858944Y (en) * | 2005-08-18 | 2007-01-17 | 西安奥星能源技术研究所 | Beaming spot punch |
| US20130056212A1 (en) * | 2011-09-02 | 2013-03-07 | Baker Hughes Incorporated | Perforating stimulating bullet |
| CN105986801A (en) * | 2015-02-09 | 2016-10-05 | 中国石油化工股份有限公司 | Method and device for explosive fracturing of sidetracking well |
-
2016
- 2016-11-18 CN CN201611027835.1A patent/CN106437666A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129276A (en) * | 1995-02-14 | 1996-08-21 | 史慧生 | Perforation and fracturing device for oil well |
| CN1324979A (en) * | 1999-12-17 | 2001-12-05 | 中国科学院力学研究所 | Explosion treating method for oil layer in oil field |
| CN2858944Y (en) * | 2005-08-18 | 2007-01-17 | 西安奥星能源技术研究所 | Beaming spot punch |
| US20130056212A1 (en) * | 2011-09-02 | 2013-03-07 | Baker Hughes Incorporated | Perforating stimulating bullet |
| CN105986801A (en) * | 2015-02-09 | 2016-10-05 | 中国石油化工股份有限公司 | Method and device for explosive fracturing of sidetracking well |
Non-Patent Citations (3)
| Title |
|---|
| 丁雁生等: "低渗透油气田"层内爆炸"增产技术研究", 《石油勘探与开发》 * |
| 李德聪等: "低渗透油田层内爆炸增产技术研究进展", 《中国工程科学》 * |
| 赵国华: "低渗油层层内裂缝深部爆炸工艺设计", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108252702A (en) * | 2018-02-06 | 2018-07-06 | 西安石油大学 | The oil and gas reservoir volume remodeling method of seam in a kind of seam |
| CN110965979A (en) * | 2019-10-24 | 2020-04-07 | 中国石油大学(华东) | Deep combustion and explosion fracturing method in radial slim hole |
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