CN106014371A - Hydraulic plug removal acidizing technology - Google Patents
Hydraulic plug removal acidizing technology Download PDFInfo
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- CN106014371A CN106014371A CN201610363055.8A CN201610363055A CN106014371A CN 106014371 A CN106014371 A CN 106014371A CN 201610363055 A CN201610363055 A CN 201610363055A CN 106014371 A CN106014371 A CN 106014371A
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- waterpower
- acidizing
- pressure
- breakdown acidizing
- plug removal
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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
Abstract
The invention provides a hydraulic plug removal acidizing technology. The technology includes the following steps that firstly, a wellhead is detached; secondly, an original well pipe column is lifted out; thirdly, a hydraulic plug removal acidizing pipe column is put down; fourthly, magnetic positioning is conducted; fifthly, high-pressure hydraulic plug removal acidification is conducted; sixthly, a ground pressure test is conducted, wherein the ground pressure test is exerted at 55 Mpa for 10 min, and the test is passed if no puncture or leakage exists; seventhly, a first layer is subjected to hydraulic plug removal acidification; eighthly, steel balls are thrown to hit a sliding sleeve; ninthly, a second layer is subjected to hydraulic plug removal acidification; tenthly, the steel balls are thrown to hit the sliding sleeve; eleventhly, a third layer is subjected to hydraulic plug removal acidification; twelfthly, a well is closed, a reaction is conducted for 12 hours, and then liquid is reversely drained; thirteenthly, the plug removal acidizing pipe column is lifted up; fourteenthly, puncturing washing and measuring are conducted; and fifteenthly, a completion pipe string is put down, wherein a layered water distribution tool and an anti-corrosion oil pipe are put down, and sealing grease is painted; and the wellhead is mounted, and the technology is ended. By the adoption of the technology, a physical method is fully used for increasing the effective penetrating distance of acid liquid in a stratum, the stratum seeping performance is improved within a relatively large range, and therefore the purposes of yield increase and injection increase are achieved.
Description
Technical field:
The present invention relates to oilfield oil well block releasing technique field, belong to a kind of waterpower Breakdown acidizing technique.
Background technology:
During oil extraction, stratum, oil-water well near wellbore zone has been contaminated clogging, and water injection pressure is high,
Some water filling layers do not reach injection allocation requirement, affect water injection rate and crude output, the block that in-place permeability is low in real work
Conventional acidulation de-plugging does not has effect, implements fracture acidizing de-plugging process complexity cost high, stratum is easily generated Organic Material Blocking.
Summary of the invention:
Not enough in order to overcome present in background technology, the present invention provides a kind of waterpower Breakdown acidizing technique, and this application is filled
Divide Applied Physics method to improve acid solution effective penetration range in the earth formation, in a big way, improve stratum permeability energy, from
And reach consumption reduction volume increase, the purpose of augmented injection.
The technical solution adopted for the present invention to solve the technical problems is: this waterpower Breakdown acidizing technique includes following step
Rapid:
(1), well head is torn open: tear well head open, fill well head controller, without overflow；
(2), former well casing post is played；
(3), lower waterpower Breakdown acidizing tubing string: lower plug, packer 5 grades, band sand blower of sliding sleeve, sanding machine, hydraulic anchor, peace
Full joint, external upset tubing；
(4), magnetic orientation: coordinating test team to survey magnetic orientation, tool depth is qualified；
(5), high-pressure hydraulic Breakdown acidizing prepares: extemporaneous preparation acid solution, standby 3, acid solution tank car, water-tank lorry 4, connection height
Press pump car, is acidified pump truck, makees waterpower Breakdown acidizing and prepares；
(6), ground pressure testing: ground pressure testing 55Mpa, 10min do not sting that not leak pressure testing qualified:
(7), waterpower Breakdown acidizing 1 layer: with the clear water 30～80m containing anti-agent of splashing3, improve pump pressure and splash pressure row
Amount dynamically, adds huge discharge after confirming to press off crack and makes crack extend forward, utilize ground high pressure pumping-in equipment will contain expansion-resisting agent clear
Water, to substantially exceed the discharge capacity injection pit shaft of formation absorption ability, has suppressed high pressure, when bottom pressure exceedes near perforation oil reservoir
Near the borehole wall after the tensile strength of stratum minimum principal stress and rock, form crack in the earth formation and extend forward.Take and replaced pressure
Splitting operation, former fracturing fluid carries proppant, not only complex procedures but also pollute stratum, energy consumption high cost is high.With 1 after water filling
Acidifying pump truck acid filling liquid 18～28m3, acid solution flows to shaft bottom to the dilution decomposition of contamination and plugging thing, discharges outside well.For squeezing liquid clear water
4.0m3, it is that the acid solution in oil pipe is clamp-oned stratum for squeezing clear water, prevents acid solution to tube corrosion.Complete 1 layer of waterpower Breakdown acidizing
Construction；Containing anti-agent of splashing in clear water, the mass concentration of anti-agent of splashing is 1%；Anti-agent reservoir reconstruction of splashing relies on Electrostatic Absorption suppression
Small bits of clay migration and hydration swelling, to clay swell, good inhibitory action of disperseing and migrate.
(8), pitching is skidded and is overlapped: is put into by steel ball in oil pipe, skids with pump truck and overlap, block 1 layer；
(9), waterpower Breakdown acidizing 2 layers: with the clear water 30～80m containing 1% anti-agent of splashing3, carry out waterpower de-plugging and improve pump
Pressure injection meaning observed pressure discharge capacity is dynamic, adds huge discharge and make crack extend forward after confirming to press off crack, with acidifying pump truck after de-plugging
Acid filling liquid 18～28m3, for squeezing liquid clear water 4.0m3, complete 2 layers of waterpower Breakdown acidizing construction；
(10), pitching is skidded and is overlapped: is put into by steel ball in oil pipe, skids with pump truck and overlap, block 2 layers；
(11), waterpower Breakdown acidizing 3 layers: with the clear water 30～80m containing 1% anti-agent of splashing3, carry out waterpower de-plugging and improve pump
Pressure injection meaning observed pressure discharge capacity is dynamic, adds huge discharge and make crack extend forward after confirming to press off crack, with acidifying pump truck after de-plugging
Acid filling liquid 18～28m3, for squeezing liquid clear water 4.0m3, complete 3 layers of waterpower Breakdown acidizing construction；Closing well reaction 12h；
(12) discharge opeing, is returned: returning discharge opeing, after discharge opeing, well head is without overflow；
(13), Breakdown acidizing tubing string is played: trip out external upset tubing, safety joint, hydraulic anchor, band sand blower of sliding sleeve, repacking
Sanding machine, packer 5 grades and plug；
(14), thorn is washed and is measured: thorn is washed and measured oil pipe, assembles completion tubular column；
(15), lower completion tubular column: lower box cupling, antisepsis oil pipe, painting stop-leak compound；Seat well head, ending.
Acid solution in such scheme is made up of following reagent, each component by weight ratio: acid solution amount 18m3, wherein hydrochloric acid
7300 parts, Fluohydric acid. 820 parts, demulsifier 230 parts, 650 parts of surfactant, corrosion inhibiter 2300 parts, ferrous stability 230
Part, expansion-resisting agent 1400 parts and 5070 parts of water.Expansion-resisting agent is potassium chloride or ammonium chloride.
The waterpower Breakdown acidizing technique having the beneficial effect that the application of the present invention, is clear with containing expansion-resisting agent
Water and high concentration Compound-acid are working solution, utilize ground high pressure pumping-in equipment will contain expansion-resisting agent clear water, to substantially exceed stratum suction
The discharge capacity of receipts ability injects pit shaft, has suppressed high pressure, when bottom pressure exceedes minimum master in stratum near the borehole wall near perforation oil reservoir
After the tensile strength of stress and rock, form crack in the earth formation and extend forward.Then, the high concentration Compound-acid that will prepare
Injecting in crack, acid solution flows to shaft bottom to the dilution decomposition of contamination and plugging thing, discharges outside well.Define in the earth formation and there is a fixed length
Degree, the high water conservancy diversion crack of width.Improve seepage flow mode and the seepage flow condition of fluid near stratum, expand seepage area, subtract
Little filtrational resistance also relieves the pollution near the borehole wall, thus reaches volume increase, the purpose of augmented injection.
Accompanying drawing illustrates:
Fig. 1 is ground floor Fracturing Monitoring curve chart in embodiment 1.
Fig. 2 is second layer Fracturing Monitoring curve chart in embodiment 1.
Fig. 3 is third layer Fracturing Monitoring curve chart in embodiment 1.
Fig. 4 is ground floor Fracturing Monitoring curve chart in embodiment 2.
Fig. 5 is second layer Fracturing Monitoring curve chart in embodiment 2.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated:
Embodiment 1,
(1), tear well head open, fill well head controller, without overflow.(2), play former well casing post, trip out Φ 62mm antisepsis oil pipe 116
Root, Y341-114YF*0.4/0.6 packer 2 grades, bridge-type * 1m eccentric injection mandrel 2,50.8/47*0.3 ball seat 1, check:
Trip out former well tubing wax serious.(3), measure oil pipe and assemble waterpower Breakdown acidizing tubing string.(4), lower waterpower Breakdown acidizing tubing string
Lower Φ 62mm plug 1, Y344-114 packer 5 grades, band sand blower of sliding sleeve 2, reequip sanding machine 1, Φ 114mm hydraulic anchor
1, Φ 110mm safety joint 1, Φ 62mm external upset tubing 114, complete degree of depth 1101.05m.(5), magnetic orientation, coordinate
Test team surveys magnetic orientation, and tool depth is qualified.(5), high-pressure hydraulic Breakdown acidizing prepare, extemporaneous preparation acid solution 44m3, standby acid solution
3, tank car, water-tank lorry 4, anti-agent mass concentration of splashing is 1% clear water 102m3, connect high pressure pump truck, be acidified pump truck, make waterpower solution
Stifled acidifying prepares.(6), ground pressure testing, ground pressure testing 55Mpa, 10min do not sting that not leak pressure testing qualified.(6), waterpower Breakdown acidizing 1
Layer: with preventing that agent mass concentration of splashing is 1% clear water 30m3, carry out waterpower de-plugging pump pressure and dropped to 18Mpa by 25Mpa, discharge capacity by
1.5m3/ min rises to 2.0m3/ min, 20min, termination of pumping pressure 11Mpa when sharing, with 1 acidifying pump truck acid filling liquid 18m3, replace
Squeeze liquid 4.0m3, pump pressure 12.1Mpa does not drops, discharge capacity 0.5m3/ min, is acidified used time 40min, completes 1 layer of waterpower Breakdown acidizing construction.
1 lamination splits monitoring curve as shown in Figure 1.(7), pitching skid set, Φ 38mm steel ball is put in oil pipe, skids set with pump truck,
Block 1 layer.(8), waterpower Breakdown acidizing 2 layers, be 1% clear water 30m by anti-agent mass concentration of splashing3, carry out waterpower de-plugging pump pressure by
25.63Mpa drops to 22Mpa, and discharge capacity is by 1.2m3/ min rises to 1.6m3/ min, 25min, termination of pumping pressure 14Mpa when sharing,
With 1 acidifying pump truck acid filling liquid 18m3, for squeezing liquid 4.0m3, pump pressure 14Mpa does not drops, discharge capacity 0.5m3/ min, is acidified used time 40min,
Complete 2 layers of waterpower Breakdown acidizing construction.2 laminations split monitoring curve as shown in Figure 2..(9), pitching skids set by Φ 43mm steel ball
In input oil pipe, skid with pump truck and overlap.Block 2 layers.(10), waterpower Breakdown acidizing 3 layers, be 1% clear by anti-agent mass concentration of splashing
Water 30m3, carrying out waterpower de-plugging pump pressure and dropped to 24Mpa by 29Mpa, discharge capacity is by 1.2m3/ min rises to 1.6m3/ min, shares
Time 25min；Termination of pumping pressure 13Mpa, with 1 acidifying pump truck acid filling liquid 8.0m3, for squeezing liquid 4.0m3, pump pressure 13Mpa does not drops, discharge capacity
0.5m3/ min, is acidified used time 25min, completes 3 layers of position waterpower Breakdown acidizing construction.3 laminations split monitoring curve as shown in Figure 3.Close
Well reaction 12h.(11), return discharge opeing, return discharge opeing 8m3, well head is without overflow.(12), play Breakdown acidizing tubing string, trip out Φ 62mm additional
Heat-bodied oil pipe 114, Φ 110mm safety joint 1, Φ 114mm hydraulic anchor 1, band sand blower of sliding sleeve 2, reequip sanding machine 1
Part, Y344-114 packer 5 grades, Φ 62mm plug 1.(13), stinging to wash and measure, thorn is washed and is measured oil pipe.(9), completion tubular is assembled
Post.(this down-hole commingled water injection tubing string), lower Φ 62mm box cupling 1, Φ 62mm antisepsis oil pipe 116, complete degree of depth 1098.40m.
Lower completion tubular column base well head finishes up.The technique effect that this well is reached after using this technique is shown in Table 1.
Embodiment 2,
(1), tear well head open, fill well head controller, without overflow.(2), former well casing post is played: trip out Φ 62mm antisepsis oil pipe 117
Root, Y341-114XM packer 2 grades, 665-2 eccentric injection mandrel 2, Φ 62mm extremely blocks up 1, checks: trip out former well oil pipe complete
Good.(3), measure oil pipe and assemble waterpower Breakdown acidizing tubing string.(4), lower waterpower Breakdown acidizing tubing string, lower Φ 62mm plug 1,
Y344-114 packer 3 grades, band sand blower of sliding sleeve 1, reequip sanding machine 1, Φ 114mm hydraulic anchor 1, Φ 110mm safety
Joint 1, Φ 62mm external upset tubing 113, complete degree of depth 1085.38m.(4), magnetic orientation, coordinate test team survey magnetic orientation,
Tool depth is qualified.(5), high-pressure hydraulic Breakdown acidizing prepare, extemporaneous preparation acid solution 46m3, standby 3, acid solution tank car, water-tank lorry 4
Platform, is 1% clear water 170m containing anti-agent mass concentration of splashing3, connect high pressure pump truck, be acidified pump truck, make waterpower Breakdown acidizing and prepare.
(6), ground pressure testing, ground pressure testing 55Mpa, 10min do not sting that not leak pressure testing qualified.(7), waterpower Breakdown acidizing F21 layer, with containing anti-
Agent mass concentration of splashing is 1% clear water 80m3, carrying out waterpower de-plugging, pump pressure is dropped to 29.0Mpa by 37.0Mpa, and discharge capacity is by 2.0m3/
Min rises to 2.4m3/ min, 50min, termination of pumping pressure 17.3Mpa, acid filling liquid 18.0m when sharing3, for squeezing liquid 4.0m3, pump pressure
29.0Mpa, does not drops, discharge capacity 2.0m3/ min, is acidified used time 12min, completes the construction of F21 layer waterpower Breakdown acidizing.F21 lamination splits
Monitoring curve is as shown in Figure 4.(8), pitching skidding is overlapped, by Φ 38mm steel ball input oil pipe, with pump truck skidding set, closure F21
Layer.(9), waterpower Breakdown acidizing F171 layer, with being 1% clear water 80m containing anti-agent mass concentration of splashing3, carry out waterpower de-plugging pump pressure by
33.0Mpa drops to 28.0Mpa, and discharge capacity is by 2.0m3/ min rises to 2.4m3/ min, 50min when sharing, termination of pumping pressure
16.0Mpa, acid filling liquid 28.0m3, for squeezing liquid 4.0m3, pump pressure 28.0Mpa does not drops, discharge capacity 2.0m3/ min, is acidified used time 28min,
Complete the construction of F171 layer waterpower Breakdown acidizing.F171 lamination splits monitoring curve as shown in Figure 5.Closing well reaction 12h.(10), the row of returning
Liquid, returns discharge opeing 3.6m3, well head is without overflow.(11), play Breakdown acidizing tubing string, trip out Φ 62mm external upset tubing 113, Φ
110mm safety joint 1, Φ 114mm hydraulic anchor 1, band sand blower of sliding sleeve 1, reequip sanding machine 1, Y344-114 insulates
Device 3 grades, Φ 62mm plug 1.(12), stinging to wash and measure, thorn is washed and is measured oil pipe, assembles completion tubular column.(13), lower completion tubular column,
Lower Φ 50.8*47 ball and seat 1, bridge type eccentric injection mandrel 2 overlaps, Y341-114-X-JH packer 2 grades, Φ 62mm antisepsis oil pipe
117, Φ 62mm tubing nipple 5.0m, complete degree of depth 1096.38m.(14), oil pipe Φ 59mm internal gauge of going into the well pass through, be coated with
Stop-leak compound.(15), seat well head, tear well head controller open.(15), seat well head survey magnetic orientation, coordinate test team survey magnetic orientation, work of going into the well
The tool degree of depth is qualified.19.3Mpa just suppressed by release pump truck, and voltage stabilizing 15min pressure does not drops, and it is qualified to discharge, ending.This well uses this
The technique effect reached after technique is shown in Table 1.
Acid solution in such scheme is made up of following reagent: hydrochloric acid 7300Kg, Fluohydric acid. 820Kg, demulsifier 230Kg, table
Face activating agent 650Kg, corrosion inhibiter 2300Kg, ferrous stability 230Kg, expansion-resisting agent 1400Kg and water 5070Kg.Expansion-resisting agent is
Potassium chloride or ammonium chloride.
Well waterpower Breakdown acidizing statistical effect table table 1
The application can reach following purpose: 1, abundant Applied Physics method improve acid solution in bottom effectively penetrate away from
From, in a big way, improve stratum permeability energy.2, Breakdown acidizing can be layered, very oil reservoir data be determined de-plugging and acidifying
Liquid measure.3, compared with conventional acidulation de-plugging, plug removal radius is big, forms the passage of a plurality of Thief zone ability, has contamination and plugging thing
Stronger decomposition and dilution capacity.4, replace pressure break, reduce formation contaminant, volume increase consumption reduction.
The application scope of application: 1, be applicable to the straight well inclined shaft within well depth 2500 meters；2, old well regulating multi-zone production rate injection allocation, real
Taping the latent power of existing oil reservoir remaining oil；3, it is applicable to peripheral hyposmosis, low abundance, the oil-extracting well water injection well of low yield block；4, poly-drive
The blocking of oil-water well near wellbore zone.
Layering Breakdown acidizing technique refers to the reservoir bigger for interlayer span, in the case of fixed tubular column, utilizes well
The mode of lower machine tool layering is implemented the most successively to construct respectively.
Also other well is implemented this technique, the results are shown in Table 2:
Well waterpower Breakdown acidizing statistical effect table table 2
Claims (2)
1. waterpower Breakdown acidizing technique, comprises the following steps:
(1), well head is torn open: tear well head open, fill well head controller, without overflow；
(2), former well casing post is played；
(3), lower waterpower Breakdown acidizing tubing string: lower plug, packer 5 grades, band sand blower of sliding sleeve, repacking sanding machine, hydraulic anchor, peace
Full joint, external upset tubing；
(4), magnetic orientation: coordinating test team to survey magnetic orientation, tool depth is qualified；
(5), high-pressure hydraulic Breakdown acidizing prepares: extemporaneous preparation acid solution, standby 3, acid solution tank car, water-tank lorry 4, connection high-pressure pump
Car, is acidified pump truck, makees waterpower Breakdown acidizing and prepares；
(6), ground pressure testing: ground pressure testing 55Mpa, 10min do not sting that not leak pressure testing qualified:
(7), waterpower Breakdown acidizing 1 layer: with the clear water 30～80m containing 1% anti-agent of splashing3, carry out waterpower de-plugging and improve pump pressure attention
Observed pressure discharge capacity is dynamic, adds huge discharge and make crack extend forward after confirming to press off crack, with acidifying pump truck acid filling liquid after de-plugging
18～28m3, for squeezing liquid clear water 4.0m3, complete 1 layer of waterpower Breakdown acidizing construction；(note: expansion-resisting agent is potassium chloride or ammonium chloride)；
(8), pitching is skidded and is overlapped: is put into by steel ball in oil pipe, skids with pump truck and overlap, block 1 layer；
(9), waterpower Breakdown acidizing 2 layers: with the clear water 30～80m containing 1% anti-agent of splashing3, carry out waterpower de-plugging and improve pump pressure attention
Observed pressure discharge capacity is dynamic, adds huge discharge and make crack extend forward after confirming to press off crack, with acidifying pump truck acid filling liquid after de-plugging
18～28m3, for squeezing liquid clear water 4.0m3, complete 2 layers of waterpower Breakdown acidizing construction；
(10), pitching is skidded and is overlapped: is put into by steel ball in oil pipe, skids with pump truck and overlap, block 2 layers；
(11), waterpower Breakdown acidizing 3 layers: with the clear water 30～80m containing 1% anti-agent of splashing3, improve pump pressure and splash pressure row
Amount dynamically, adds huge discharge after confirming to press off crack and makes crack extend forward, with acidifying pump truck acid filling liquid 18～28m after de-plugging3, replace
Squeeze liquid clear water 4.0m3, complete 3 layers of waterpower Breakdown acidizing construction；Closing well reaction 12h.
(12) discharge opeing, is returned: returning discharge opeing, after discharge opeing, well head is without overflow；
(13), Breakdown acidizing tubing string is played: trip out external upset tubing, safety joint, hydraulic anchor, band sand blower of sliding sleeve, repacking sandblasting
Device, packer 5 grades and plug；
(14), thorn is washed and is measured: thorn is washed and measured oil pipe, assembles completion tubular column；
(15), lower completion tubular column: lower box cupling, antisepsis oil pipe, painting stop-leak compound；Seat well head, ending.
Waterpower Breakdown acidizing technique the most according to claim 1, acid solution is made up of following reagent, and each component is joined by weight
Ratio: acid solution amount 18m3, wherein hydrochloric acid 7300 parts, Fluohydric acid. 820 parts, demulsifier 230 parts, 650 parts of surfactant, corrosion inhibiter
2300 parts, ferrous stability 230 parts, expansion-resisting agent be potassium chloride or ammonium chloride 1400 parts and 5070 parts of clear water.
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| CN201610363055.8A CN106014371B (en) | 2016-05-27 | 2016-05-27 | A kind of waterpower Breakdown acidizing technique |
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| CN106014371B CN106014371B (en) | 2018-10-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113494271A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Shaft blockage removing method and device for high-pressure gas well |
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| CN101126314A (en) * | 2007-09-12 | 2008-02-20 | 中国石油大学(华东) | Foam plug flow diverting acidification technique |
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| CN113494271A (en) * | 2020-03-18 | 2021-10-12 | 中国石油天然气股份有限公司 | Shaft blockage removing method and device for high-pressure gas well |
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| CN106014371B (en) | 2018-10-02 |
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