CN106014371B - A kind of waterpower Breakdown acidizing technique - Google Patents
A kind of waterpower Breakdown acidizing technique Download PDFInfo
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- CN106014371B CN106014371B CN201610363055.8A CN201610363055A CN106014371B CN 106014371 B CN106014371 B CN 106014371B CN 201610363055 A CN201610363055 A CN 201610363055A CN 106014371 B CN106014371 B CN 106014371B
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- 230000015556 catabolic process Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002253 acid Substances 0.000 claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 20
- 230000003260 anti-sepsis Effects 0.000 claims abstract description 6
- 238000012797 qualification Methods 0.000 claims abstract description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 36
- 239000003795 chemical substances by application Substances 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 24
- 238000010276 construction Methods 0.000 claims description 10
- 230000020477 pH reduction Effects 0.000 claims description 9
- 239000004576 sand Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 6
- 238000012790 confirmation Methods 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 235000019270 ammonium chloride Nutrition 0.000 claims description 3
- 239000003153 chemical reaction reagent Substances 0.000 claims description 3
- 239000001103 potassium chloride Substances 0.000 claims description 3
- 235000011164 potassium chloride Nutrition 0.000 claims description 3
- 238000012857 repacking Methods 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 16
- 238000002347 injection Methods 0.000 abstract description 13
- 239000007924 injection Substances 0.000 abstract description 13
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000003190 augmentative effect Effects 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 29
- 238000012544 monitoring process Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 6
- 238000005086 pumping Methods 0.000 description 5
- 238000011109 contamination Methods 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- -1 standby 3 Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
- 239000012224 working solution Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Waterpower Breakdown acidizing technique.Technique includes the following steps：(1), well head is torn open；(2), former well casing column is played；(3), lower waterpower Breakdown acidizing tubing string；(4), magnetic orientation；(5), high-pressure hydraulic Breakdown acidizing；(6), ground pressure testing：Ground pressure testing 55Mpa, 10min, which are not pierced, does not leak pressure testing qualification；(7), 1 layer of waterpower Breakdown acidizing；(8), pitching, which is skidded, covers；(9), 2 layers of waterpower Breakdown acidizing；(10), pitching, which is skidded, covers；(11), 3 layers of waterpower Breakdown acidizing；(12), closing well returns drain after reacting 12 hours；(13), Breakdown acidizing tubing string is played；(14), thorn, which is washed, measures；(15), lower completion tubular column：Lower leaf water-distributing tool, antisepsis oil pipe apply stop-leak compound；Seat well head, ending.The abundant Applied Physics method of this application improves the effective penetration range of acid solution in the earth formation, improves stratum permeability energy in wide range, to achieve the purpose that volume increase, augmented injection.
Description
Technical field：
The present invention relates to oilfield oil well block releasing technique fields, belong to a kind of waterpower Breakdown acidizing technique.
Background technology：
During oil extraction, oil-water well near wellbore zone stratum has been contaminated clogging, and water injection pressure is high,
Injection allocation requirement is not achieved in some water filling layers, influences water injection rate and crude output, in actual operation the low block of in-place permeability
Conventional acidulation de-plugging does not have effect, and implementation fracture acidizing de-plugging process complexity is of high cost, and Organic Material Blocking is also easy to produce to stratum.
Invention content：
Insufficient present in background technology in order to overcome, the present invention provides a kind of waterpower Breakdown acidizing technique, and this application is filled
Divide Applied Physics method to improve the effective penetration range of acid solution in the earth formation, improves stratum permeability energy in wide range, from
And achieve the purpose that consumption reduction volume increase, augmented injection.
The technical solution adopted by the present invention to solve the technical problems is：The waterpower Breakdown acidizing technique includes following step
Suddenly：
(1), well head is torn open：It tears well head open, fills well head controller, no overflow；
(2), former well casing column is played；
(3), lower waterpower Breakdown acidizing tubing string：Lower silk plug, 5 grades of packer, band sand blower of sliding sleeve, sanding machine, hydraulic anchor, peace
Full connector, external upset tubing；
(4), magnetic orientation：Cooperation test team surveys magnetic orientation, and 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 are high
Press pump vehicle is acidified pump truck, makees the preparation of waterpower Breakdown acidizing；
(6), ground pressure testing：Ground pressure testing 55Mpa, 10min, which are not pierced, does not leak pressure testing qualification：
(7), 1 layer of waterpower Breakdown acidizing：With 30~80m of clear water containing expansion-resisting agent3, improve pump pressure and splash pressure
Discharge capacity dynamic, increasing discharge capacity makes crack extend forward after confirmation presses off crack, will contain expansion-resisting agent using ground high pressure pumping-in equipment
Clear water, the discharge capacity to substantially exceed formation absorption ability inject pit shaft, high pressure have been suppressed near perforation oil reservoir, when bottom pressure is super
After crossing the neighbouring stratum minimum principal stress of the borehole wall and the tensile strength of rock, crack is formed in the earth formation and is extended forward.It takes and replaces
Pressure break process, former fracturing fluid carry proppant, not only complex procedures but also pollute stratum, high energy consumption is of high cost.With 1 after water filling
Platform is acidified 18~28m of pump truck acid filling liquid3, acid solution decomposes the dilution of contamination and plugging object and flows to shaft bottom, outside discharge well.For crowded liquid clear water
4.0m3, it is that the acid solution in oil pipe is squeezed into stratum for crowded clear water, prevents acid solution to tube corrosion.Complete 1 layer of waterpower de-plugging acid
Change construction；Contain expansion-resisting agent in clear water, the mass concentration of expansion-resisting agent is 1%；Electrostatic Absorption is relied in expansion-resisting agent reservoir reconstruction
Inhibit small bits of clay migration and hydration swelling, has good inhibiting effect to clay swell, dispersion and migration.
(8), pitching, which is skidded, covers：Steel ball is put into oil pipe, is skidded and is covered with pump truck, blocks 1 layer；
(9), 2 layers of waterpower Breakdown acidizing：With 30~80m of clear water containing 1% expansion-resisting agent3, carry out waterpower de-plugging and improve pump
Pressure injection anticipates observed pressure discharge capacity dynamically, and increasing discharge capacity makes crack extend forward after confirmation presses off crack, with acidification pump truck after de-plugging
18~28m of acid filling liquid3, for liquid clear water 4.0m is squeezed3, complete 2 layers of waterpower Breakdown acidizing construction；
(10), pitching, which is skidded, covers：Steel ball is put into oil pipe, is skidded and is covered with pump truck, blocks 2 layers；
(11), 3 layers of waterpower Breakdown acidizing：With 30~80m of clear water containing 1% expansion-resisting agent3, carry out waterpower de-plugging raising
Pump pressure splashs pressure discharge capacity dynamic, and increasing discharge capacity makes crack extend forward after confirmation presses off crack, and acidizing pump is used after de-plugging
18~28m of vehicle acid filling liquid3, for liquid clear water 4.0m is squeezed3, complete 3 layers of waterpower Breakdown acidizing construction；Closing well reacts 12h；
(12), drain is returned：Drain is returned, well head is without overflow after drain；
(13), Breakdown acidizing tubing string is played：Act external upset tubing, safety joint, hydraulic anchor, band sand blower of sliding sleeve, repacking
Sanding machine, 5 grades of packer and silk plug；
(14), thorn, which is washed, measures：Thorn, which is washed, measures oil pipe, assembles completion tubular column；
(15), lower completion tubular column：Lower box cupling, antisepsis oil pipe apply stop-leak compound；Seat well head, ending.
Acid solution in said program is made of following reagent, and each component is by weight ratio：Acid solution amount 18m3, wherein hydrochloric acid
7300 parts, 820 parts of hydrofluoric acid, 230 parts of demulsifier, 650 parts of surfactant, 2300 parts of corrosion inhibiter, ferrous stability 230
5070 parts of part, 1400 parts of expansion-resisting agent and water.Expansion-resisting agent is potassium chloride or ammonium chloride.
The present invention's has an advantageous effect in that：The waterpower Breakdown acidizing technique of the application, is with containing the clear of expansion-resisting agent
Water and high concentration Compound-acid are working solution, will contain expansion-resisting agent clear water using ground high pressure pumping-in equipment, to substantially exceed stratum suction
The discharge capacity of receipts ability injects pit shaft, and high pressure has been suppressed near perforation oil reservoir, when bottom pressure is more than stratum minimum master near the borehole wall
After the tensile strength of stress and rock, crack is formed in the earth formation and is extended forward.Then, by prepared high concentration Compound-acid
It injects in crack, acid solution decomposes the dilution of contamination and plugging object and flows to shaft bottom, is discharged outside well.It is formd in the earth formation with a fixed length
The high water conservancy diversion crack of degree, width.The seepage flow mode and seepage flow condition for improving fluid near stratum, expand seepage area, subtract
Small filtrational resistance simultaneously relieves the pollution near the borehole wall, to achieve the purpose that volume increase, augmented injection.
Description of the drawings：
Fig. 1 is first layer Fracturing Monitoring curve graph in embodiment 1.
Fig. 2 is second layer Fracturing Monitoring curve graph in embodiment 1.
Fig. 3 is third layer Fracturing Monitoring curve graph in embodiment 1.
Fig. 4 is first layer Fracturing Monitoring curve graph in embodiment 2.
Fig. 5 is second layer Fracturing Monitoring curve graph in embodiment 2.
Specific implementation mode
Below in conjunction with embodiment, the present invention is further illustrated：
Embodiment 1,
(1), it tears well head open, fills well head controller, no overflow.(2), former well casing column is played, acts Φ 62mm antisepsis oil pipes 116
Root, 2 grades of Y341-114YF*0.4/0.6 packers, bridge-type * 1m eccentric injection mandrels 2,50.8/47*0.3 ball seats 1 check：
It is serious to act former well tubing wax.(3), it measures oil pipe and assembles waterpower Breakdown acidizing tubing string.(4), lower waterpower Breakdown acidizing tubing string
Lower Φ 62mm silk plugs 1,5 grades of Y344-114 packers, band sand blower of sliding sleeve 2 reequip sanding machine 1, Φ 114mm hydraulic anchors
1, Φ 110mm safety joints 1, Φ 62mm external upset tubings 114 complete depth 1101.05m.(5), magnetic orientation is matched
It closes test team and surveys magnetic orientation, tool depth is qualified.(5), high-pressure hydraulic Breakdown acidizing prepares, extemporaneous preparation acid solution 44m3, standby acid
Tank truck 3, water-tank lorry 4, expansion-resisting agent mass concentration are 1% clear water 102m3, high pressure pump truck is connected, pump truck is acidified, makees water
Power Breakdown acidizing prepares.(6), ground pressure testing, ground pressure testing 55Mpa, 10min, which are not pierced, does not leak pressure testing qualification.(6), waterpower de-plugging
1 layer of acidification：It is 1% clear water 30m with expansion-resisting agent mass concentration3, carry out waterpower de-plugging pump pressure and 18Mpa dropped to by 25Mpa, arrange
Amount is by 1.5m3/ min rises to 2.0m3/ min, 20min, termination of pumping pressure 11Mpa when sharing, with 1 acidification pump truck acid filling liquid
18m3, for liquid 4.0m is squeezed3, it is pumped 12.1Mpa and does not drop, discharge capacity 0.5m3/ min is acidified used time 40min, completes 1 layer of waterpower de-plugging
Acidizing treatment.It is as shown in Figure 1 that monitoring curve is split in 1 lamination.(7), pitching, which is skidded, covers, and Φ 38mm steel balls is put into oil pipe, with pump
Vehicle, which skids, to be covered, and blocks 1 layer.(8), 2 layers of waterpower Breakdown acidizing are 1% clear water 30m with expansion-resisting agent mass concentration3, carry out waterpower
De-plugging pump pressure drops to 22Mpa by 25.63Mpa, and discharge capacity is by 1.2m3/ min rises to 1.6m3/ min, 25min when sharing, termination of pumping
Pressure 14Mpa, with 1 acidification pump truck acid filling liquid 18m3, for liquid 4.0m is squeezed3, it is pumped 14Mpa and does not drop, discharge capacity 0.5m3/ min, acid
Change used time 40min, completes 2 layers of waterpower Breakdown acidizing construction.It is as shown in Figure 2 that monitoring curve is split in 2 laminations..(9), pitching, which is skidded, covers
Φ 43mm steel balls are put into oil pipe, is skidded and is covered with pump truck.Block 2 layers.(10), 3 layers of waterpower Breakdown acidizing, with expansion-resisting agent matter
Measure a concentration of 1% clear water 30m3, carry out waterpower de-plugging pump pressure and 24Mpa dropped to by 29Mpa, discharge capacity is by 1.2m3/ min rises to
1.6m3/ min, 25min when sharing；Termination of pumping pressure 13Mpa, with 1 acidification pump truck acid filling liquid 8.0m3, for liquid 4.0m is squeezed3, pump pressure
13Mpa does not drop, discharge capacity 0.5m3/ min is acidified used time 25min, completes 3 layers of position waterpower Breakdown acidizing construction.3 layers of Fracturing Monitoring song
Line is as shown in Figure 3.Closing well reacts 12h.(11), drain is returned, drain 8m is returned3, well head is without overflow.(12), Breakdown acidizing tubing string is played,
Act Φ 62mm external upset tubings 114, Φ 110mm safety joints 1, Φ 114mm hydraulic anchors 1, band sand blower of sliding sleeve 2
Part reequips sanding machine 1,5 grades of Y344-114 packers, Φ 62mm silk plugs 1.(13), thorn, which is washed, measures, and thorn, which is washed, measures oil pipe.
(9), completion tubular column is assembled.(the underground commingled water injection tubing string), lower Φ 62mm box cuplings 1, Φ 62mm antisepsis oil pipes 116 are complete
At depth 1098.40m.Lower completion tubular column base well head ending.This well uses the technique effect reached after this technique to be shown in Table 1.
Embodiment 2,
(1), it tears well head open, fills well head controller, no overflow.(2), former well casing column is played：Act Φ 62mm antisepsis oil pipes 117
Root, 2 grades of Y341-114XM packers, 665-2 eccentric injection mandrels 2, Φ 62mm are extremely 1 stifled, check：It is complete to act former well oil pipe
It is good.(3), it measures oil pipe and assembles waterpower Breakdown acidizing tubing string.(4), lower waterpower Breakdown acidizing tubing string, lower Φ 62mm silk plugs 1,
3 grades of Y344-114 packers, band sand blower of sliding sleeve 1 reequip sanding machine 1, Φ 114mm hydraulic anchors 1, Φ 110mm safety
Connector 1, Φ 62mm external upset tubings 113 complete depth 1085.38m.(4), magnetic orientation, cooperation test team survey magnetic orientation,
Tool depth is qualified.(5), high-pressure hydraulic Breakdown acidizing prepares, extemporaneous preparation acid solution 46m3, standby 3, acid solution tank car, water-tank lorry 4
Platform, mass concentration containing expansion-resisting agent are 1% clear water 170m3, high pressure pump truck is connected, pump truck is acidified, makees the preparation of waterpower Breakdown acidizing.
(6), ground pressure testing, ground pressure testing 55Mpa, 10min, which are not pierced, does not leak pressure testing qualification.(7), waterpower Breakdown acidizing F21 layers, with containing
Expansion-resisting agent mass concentration is 1% clear water 80m3, carry out waterpower de-plugging, pump pressure drops to 29.0Mpa by 37.0Mpa, discharge capacity by
2.0m3/ min rises to 2.4m3/ min, 50min, termination of pumping pressure 17.3Mpa, acid filling liquid 18.0m when sharing3, for liquid 4.0m is squeezed3,
It is pumped 29.0Mpa, is not dropped, discharge capacity 2.0m3/ min is acidified used time 12min, completes F21 layers of waterpower Breakdown acidizing construction.F21 layers
Fracturing Monitoring curve is as shown in Figure 4.(8), pitching, which is skidded, covers, and Φ 38mm steel balls are put into oil pipe, is skidded and is covered with pump truck, are blocked
F21 layers.(9), waterpower Breakdown acidizing F171 layers, be 1% clear water 80m with mass concentration containing expansion-resisting agent3, carry out waterpower de-plugging pump
Pressure drops to 28.0Mpa by 33.0Mpa, 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 liquid 4.0m is squeezed3, it is pumped 28.0Mpa and does not drop, discharge capacity 2.0m3/ min is acidified used time 28min,
Complete F171 layers of waterpower Breakdown acidizing construction.It is as shown in Figure 5 that monitoring curve is split in F171 laminations.Closing well reacts 12h.(10), the row of returning
Liquid returns drain 3.6m3, well head is without overflow.(11), Breakdown acidizing tubing string is played, acts Φ 62mm external upset tubings 113, Φ
110mm safety joints 1, Φ 114mm hydraulic anchors 1, band sand blower of sliding sleeve 1 reequip sanding machine 1, Y344-114 envelopes
Every 3 grades of device, Φ 62mm silk plugs 1.(12), thorn, which is washed, measures, and thorn, which is washed, measures oil pipe, assembles completion tubular column.(13), lower completion tubular
Column, lower Φ 50.8*47 balls and seat 1,2 sets of bridge type eccentric injection mandrel, 2 grades of Y341-114-X-JH packers, Φ 62mm anti-corrosions
117, oil pipe, Φ 62mm tubing nipple 5.0m complete depth 1096.38m.(14), oil pipe Φ 59mm inside callipers of going into the well is logical
It crosses, applies stop-leak compound.(15), seat well head, tear well head controller open.(15), seat well head surveys magnetic orientation, and cooperation test team surveys magnetic orientation,
Tool depth of going into the well is qualified.Release just suppresses 19.3Mpa with pump truck, and voltage stabilizing 15min pressure does not drop, and release is qualified, ending.This well
It is shown in Table 1 using the technique effect reached after this technique.
Acid solution in said program is made of following reagent：Hydrochloric acid 7300Kg, 820 Kg of hydrofluoric acid, 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 effect statistical form table 1
The application can reach following purpose：1, abundant Applied Physics method improve acid solution in bottom effectively penetrate away from
From the improvement stratum permeability energy in wide range.2, it can be layered Breakdown acidizing, de-plugging and acidification very are determined to oil reservoir data
Liquid measure.3, compared with conventional acidulation de-plugging, plug removal radius is big, forms the channel of a plurality of Thief zone ability, has to contamination and plugging object
Stronger decomposition and dilution capacity.4, instead of pressure break, formation contaminant, volume increase consumption reduction are reduced.
The application scope of application：1, suitable for the straight well inclined shaft within 2500 meters of well depth；2, old well regulating multi-zone production rate injection allocation, it is real
Existing oil reservoir remaining oil is taped the latent power；3, it is suitable for peripheral hyposmosis, low abundance, the oil-extracting well water injection well of low yield block；4, gather and drive
The blocking of oil-water well near wellbore zone.
Layering Breakdown acidizing technique refers to utilizing well in the case of fixed tubular column for the larger reservoir of interlayer span
The mode of lower machine tool layering is implemented targetedly successively to construct respectively.
This technique also is implemented to other wells, the results are shown in Table 2：
Well waterpower Breakdown acidizing effect statistical form table 2
Claims (1)
1. waterpower Breakdown acidizing technique, includes the following steps：
(1), well head is torn open：It tears well head open, fills well head controller, no overflow；
(2), former well casing column is played；
(3), lower waterpower Breakdown acidizing tubing string：Lower silk plug, 5 grades of packer, band sand blower of sliding sleeve, repacking sanding machine, hydraulic anchor, peace
Full connector, external upset tubing；
(4), magnetic orientation：Cooperation test team surveys magnetic orientation, and 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 connect high-pressure pump
Vehicle is acidified pump truck, makees the preparation of waterpower Breakdown acidizing；
(6), ground pressure testing：Ground pressure testing 55Mpa, 10min, which are not pierced, does not leak pressure testing qualification：
(7), 1 layer of waterpower Breakdown acidizing：With 30~80m of clear water containing 1% expansion-resisting agent3, carry out waterpower de-plugging and improve pump pressure attention
Observed pressure discharge capacity dynamic, increasing discharge capacity makes crack extend forward after confirmation presses off crack, with acidification pump truck acid filling liquid after de-plugging
18~28m3, for liquid clear water 4.0m is squeezed3, complete 1 layer of waterpower Breakdown acidizing construction；
(8), pitching, which is skidded, covers：Steel ball is put into oil pipe, is skidded and is covered with pump truck, blocks 1 layer；
(9), 2 layers of waterpower Breakdown acidizing：With 30~80m of clear water containing 1% expansion-resisting agent3, carry out waterpower de-plugging and improve pump pressure attention
Observed pressure discharge capacity dynamic, increasing discharge capacity makes crack extend forward after confirmation presses off crack, with acidification pump truck acid filling liquid after de-plugging
18~28m3, for liquid clear water 4.0m is squeezed3, complete 2 layers of waterpower Breakdown acidizing construction；
(10), pitching, which is skidded, covers：Steel ball is put into oil pipe, is skidded and is covered with pump truck, blocks 2 layers；
(11), 3 layers of waterpower Breakdown acidizing：With 30~80m of clear water containing 1% expansion-resisting agent3, improve pump pressure and splash pressure row
Amount dynamic, increasing discharge capacity makes crack extend forward after confirmation presses off crack, with 18~28m of acidification pump truck acid filling liquid after de-plugging3, replace
Squeeze liquid clear water 4.0m3, complete 3 layers of waterpower Breakdown acidizing construction；Closing well reacts 12h；
(12), drain is returned：Drain is returned, well head is without overflow after drain；
(13), Breakdown acidizing tubing string is played：Act external upset tubing, safety joint, hydraulic anchor, band sand blower of sliding sleeve, repacking sandblasting
Device, 5 grades of packer and silk plug；
(14), thorn, which is washed, measures：Thorn, which is washed, measures oil pipe, assembles completion tubular column；
(15), lower completion tubular column：Lower box cupling, antisepsis oil pipe apply stop-leak compound；Seat well head, ending；
Acid solution used in said program is made of following reagent, and each component is by weight ratio：Acid solution amount 18m3, wherein hydrochloric acid
7300 parts, 820 parts of hydrofluoric acid, 230 parts of demulsifier, 650 parts of surfactant, 2300 parts of corrosion inhibiter, ferrous stability 230
Part, expansion-resisting agent are 1400 parts of potassium chloride or ammonium chloride 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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| CN101126314A (en) * | 2007-09-12 | 2008-02-20 | 中国石油大学(华东) | Foam plug flow diverting acidification technique |
| CN103075139A (en) * | 2011-10-26 | 2013-05-01 | 中国石油天然气股份有限公司 | Immovable pipe column hydraulic jet process for fracture acidizing and pipe column thereof |
| CN102418507A (en) * | 2011-10-27 | 2012-04-18 | 中国石油天然气股份有限公司 | Low-cost deep blockage removing method for water injection well |
| CN102979497A (en) * | 2012-11-20 | 2013-03-20 | 中国石油大学(北京) | Device and method for immovable-string type packer-free sliding-sleeve hydraulic-jet pulsed acid fracturing |
| CN103061684B (en) * | 2013-01-21 | 2015-09-09 | 中国石油集团渤海钻探工程有限公司 | Open-hole horizontal well segmentation many bunches of homogeneous acidification tubing strings and acidization tool thereof |
| CN104653164B (en) * | 2013-11-22 | 2018-07-13 | 中国石油天然气股份有限公司 | Water-control blockage-removing production-increasing method for low-pressure bottom water reservoir oil well |
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2016
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