CN101251003A - Process for fracturing energetic gas - Google Patents
Process for fracturing energetic gas Download PDFInfo
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- CN101251003A CN101251003A CNA2008101039094A CN200810103909A CN101251003A CN 101251003 A CN101251003 A CN 101251003A CN A2008101039094 A CNA2008101039094 A CN A2008101039094A CN 200810103909 A CN200810103909 A CN 200810103909A CN 101251003 A CN101251003 A CN 101251003A
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- fracturing
- proppant
- load fluid
- energetic gas
- gas
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Abstract
The invention provides a method for fracturing high energy gas, comprising the following steps of: a. descending a high energy gas fracturing construction tube to a position which is 40 to 60m from a target layer and pausing the descending of the tube; b. injecting sand-laden fluid laden with proppant into a tubing-casing annular space; c. descending the construction tube to the target layer; d. igniting for fracturing. The method for fracturing the high energy gas of the invention can improve the construction effect for fracturing the high energy gas, and prolong the valid period of a measure.
Description
Technical field
The present invention relates to a kind of fracturing process, particularly relate to a kind of process for fracturing energetic gas.
Background technology
Along with carry out the grown place, the nearly well of oil-water well stops up and is on the rise, and filtrational resistance constantly increases, thereby causes oil well output or water injection well water injection rate constantly to descend, contact the obstruction of near wellbore zone by employing de-plugging measure, and then recover and raising oil well output or water injection well water injection rate.High enegry gas fracturing is exactly one of efficient de-plugging measure of oil-water well.
High enegry gas fracturing is to utilize the high energy Pressure breaking bullet at shaft bottom detonation moment generation high energy gas, obstruction to the crack is removed, opening degree to existing crack improves again, the more important thing is that high energy gas makes the oil reservoir near wellbore zone produce many radially radial cracks that are not subjected to geostatic stress control, greatly reduce the flow resistance of near wellbore zone, improve the flow conductivity of near wellbore zone, reached the purpose of increasing yield and injection.High enegry gas fracturing has many good qualities, and sums up and gets up to mainly contain following four aspects:
(1) form many radially radial cracks that are not subjected to geostatic stress control, the crack of having avoided fracturing to form is controlled by geostatic stress, and work hard in glove with easily in the crack, and its many radial crack of formation, and fracturing can only form a pair of symmetry seam;
(2) chemical plugging removal of it and other, as use more acidifying etc. and compare, it does not have two pollutions to reservoir, is not subjected to the restriction of reservoir water-sensitive, acid-sensitive etc. sensitiveness;
(3) gas of detonation generation enters oil reservoir, has the effect that makes reducing crude oil viscosity and dissolving part obstruction;
(4) construction is simple, short construction period, and cost is low, instant effect.
Though high enegry gas fracturing has formed many radial radial fissures, but do not resemble at present fracturing in the crack that the high enegry gas fracturing that adopts forms that works the filling proppant, therefore under country rock and clossing pressure effect, the very fast again closure in crack causes the measure period of validity very short.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of process for fracturing energetic gas, can improve the high enegry gas fracturing construction effect, prolongs the measure period of validity.
For solving the problems of the technologies described above, the invention provides a kind of process for fracturing energetic gas, comprising: a down to 40～60 meters of distance target zone, suspends lower tubular column with high-energy air fracturing construction tubular pile; B injects the load fluid that carries proppant to the oil jacket annular space; C arrives target zone down with described operating tool string; D ignites pressure break.
Above-mentioned process for fracturing energetic gas, wherein, described load fluid is the quaternary surfactant of the LCFA of 1～2.5% (weight).
Above-mentioned process for fracturing energetic gas, wherein, the granularity of described proppant is 0.9～1.2mm.
Above-mentioned process for fracturing energetic gas, wherein, proppant concentration is 20～30% (weight) in the described load fluid.
Above-mentioned process for fracturing energetic gas, wherein, the speed of injecting load fluid among the described step b is 150～200L/min, is preferably 190L/min.
Above-mentioned process for fracturing energetic gas, wherein, the density of described proppant is 1200Kg/m
3
Process for fracturing energetic gas of the present invention, because the detonation of detonation bullet is to finish in the moment of Millisecond in the time, the high energy gas that produces during detonation promotes the interior liquid of pit shaft and moves upward, thereby make the very big negative pressure of the inner formation of shaft bottom and even bottom pit shaft and target zone, after high energy gas discharges, in the pit shaft liquid descending rapidly again under action of gravity, partially liq enters crack and the stratum that high enegry gas fracturing forms, proppant also enters the crack with load fluid, be filled in the crack, the crack is played a supportive role, prevent closing up of cracks, thereby improved treatment effect greatly, particularly prolonged the measure period of validity.
The specific embodiment
Describe the present invention in detail below in conjunction with embodiment.
Embodiment 1
High-energy air fracturing construction tubular pile during down to 50 meters of distance target zone, is suspended lower tubular column; Connect surface line then, the load fluid that carries proppant that has prepared from oil jacket annular space low speed infusion, wherein load fluid is the quaternary surfactant of the LCFA of 1% (weight), and the proppant weight content is 25% in the load fluid, and proppant density is 1200Kg/m
3, granularity is 0.9～1.2mm, and used proppant is that market is buied, and the speed of injecting load fluid is 150L/min, fills with the oil jacket annular space; Again operating tool string is arrived target zone down, the good construction pipe of seat is gone here and there, and ignites pressure break.
Embodiment 2
High-energy air fracturing construction tubular pile during down to 40 meters of distance target zone, is suspended lower tubular column; Connect surface line then, the load fluid that carries proppant that has prepared from oil jacket annular space low speed infusion, wherein load fluid is the quaternary surfactant of the LCFA of 2% (weight), and the proppant weight content is 20% in the load fluid, and proppant density is 1200Kg/m
3, granularity is 0.9～1.2mm, and used proppant is that market is buied, and the speed of injecting load fluid is 190L/min, fills with the oil jacket annular space; Again operating tool string is arrived target zone down, the good construction pipe of seat is gone here and there, and ignites pressure break.
Embodiment 3
High-energy air fracturing construction tubular pile during down to 60 meters of distance target zone, is suspended lower tubular column; Connect surface line then, the load fluid that carries proppant that has prepared from oil jacket annular space low speed infusion, wherein load fluid is the quaternary surfactant of the LCFA of 2.5% (weight), and the proppant weight content is 30% in the load fluid, and proppant density is 1200Kg/m
3, granularity is 0.9～1.2mm, and used proppant is that market is buied, and the speed of injecting load fluid is 200L/min, fills with the oil jacket annular space; Again operating tool string is arrived target zone down, the good construction pipe of seat is gone here and there, and ignites pressure break.
By the lab simulation development test, enter field trial in June, 2007, the 11 mouthfuls of wells of constructing altogether, construction one-time success rate 100%.8 mouthfuls of oil wells of construction, average individual well day volume increase crude oil 1.6t/d, 3 mouthfuls in construction well, the individual well fluence 12m that on average increases day by day
3, measure is still effective so far, and period of validity has reached 10 months, and be generally 3 months with the high enegry gas fracturing measure period of validity of proppant, at most also be no more than half a year, thereby the present invention is the once breakthrough of high enegry gas fracturing technology, measure effect and measure period of validity obviously improve.
Claims (7)
1, a kind of process for fracturing energetic gas comprises the steps:
A down to 40～60 meters of distance target zone, suspends lower tubular column with high-energy air fracturing construction tubular pile;
B injects the load fluid that carries proppant to the oil jacket annular space;
C arrives target zone down with described operating tool string;
D ignites pressure break.
2, process for fracturing energetic gas as claimed in claim 1 is characterized in that, described load fluid is the quaternary surfactant of the LCFA of 1～2.5% (weight).
3, process for fracturing energetic gas as claimed in claim 1 or 2 is characterized in that, the granularity of described proppant is 0.9～1.2mm.
4, process for fracturing energetic gas as claimed in claim 1 or 2 is characterized in that, proppant concentration is 20～30% (weight) in the described load fluid.
5, process for fracturing energetic gas as claimed in claim 1 or 2 is characterized in that, the speed of injecting load fluid among the described step b is 150～200L/min.
6, process for fracturing energetic gas as claimed in claim 5 is characterized in that, the speed of described injection load fluid is 190L/min.
7, process for fracturing energetic gas as claimed in claim 1 or 2 is characterized in that, the density of described proppant is 1200Kg/m
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101039094A CN101251003A (en) | 2008-04-11 | 2008-04-11 | Process for fracturing energetic gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101039094A CN101251003A (en) | 2008-04-11 | 2008-04-11 | Process for fracturing energetic gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101251003A true CN101251003A (en) | 2008-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101039094A Pending CN101251003A (en) | 2008-04-11 | 2008-04-11 | Process for fracturing energetic gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121005A (en) * | 2014-07-15 | 2014-10-29 | 中北大学 | Equipment for guiding propping agents into underground fractured strata under drive of high-energy air flow |
| CN104975838A (en) * | 2015-07-17 | 2015-10-14 | 中国石油大学(华东) | Method capable of preventing pre-existing cracks against closure by adoption of high-energy gas fracture |
| 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 |
-
2008
- 2008-04-11 CN CNA2008101039094A patent/CN101251003A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104121005A (en) * | 2014-07-15 | 2014-10-29 | 中北大学 | Equipment for guiding propping agents into underground fractured strata under drive of high-energy air flow |
| CN104121005B (en) * | 2014-07-15 | 2016-10-05 | 中北大学 | High energy air stream drives proppant imports the equipment on underground fracture stratum |
| 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 |
| CN104975838A (en) * | 2015-07-17 | 2015-10-14 | 中国石油大学(华东) | Method capable of preventing pre-existing cracks against closure by adoption of high-energy gas fracture |
| CN104975838B (en) * | 2015-07-17 | 2017-11-14 | 中国石油大学(华东) | A kind of method for preventing high enegry gas fracturing existing crack from closing |
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Application publication date: 20080827 |