CN110159243A - Acid fracturing method for seam network of carbonate rock reservoir - Google Patents
Acid fracturing method for seam network of carbonate rock reservoir Download PDFInfo
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- CN110159243A CN110159243A CN201910444237.1A CN201910444237A CN110159243A CN 110159243 A CN110159243 A CN 110159243A CN 201910444237 A CN201910444237 A CN 201910444237A CN 110159243 A CN110159243 A CN 110159243A
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- 239000002253 acid Substances 0.000 title claims abstract description 157
- 238000000034 method Methods 0.000 title claims abstract description 64
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 40
- 239000011435 rock Substances 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 102
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 50
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 206010017076 Fracture Diseases 0.000 claims description 49
- 239000000243 solution Substances 0.000 claims description 39
- 238000002347 injection Methods 0.000 claims description 18
- 239000007924 injection Substances 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 4
- 239000006004 Quartz sand Substances 0.000 claims description 2
- 208000010392 Bone Fractures Diseases 0.000 claims 2
- 239000002981 blocking agent Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 18
- 239000000654 additive Substances 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 9
- 239000003638 chemical reducing agent Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 230000009466 transformation Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 5
- 239000004927 clay Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 3
- 239000010459 dolomite Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000011973 solid acid Substances 0.000 description 3
- 206010010149 Complicated fracture Diseases 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000012360 testing method Methods 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
Landscapes
- 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)
- Detergent Compositions (AREA)
Abstract
The invention provides a carbonate rock reservoir seam network acid fracturing method. The method comprises the following steps: a. selecting a seam network acid fracturing well section; b. injecting low-viscosity acid liquor and slick water into the well in sequence at low discharge; c. sequentially injecting low-viscosity slick water and acid liquor into the well at a high discharge rate; d. injecting slickwater to carry proppant or temporary plugging agent into the well; e. repeating steps c and d one or more times; f. and injecting displacement fluid into the well at low discharge. The method plays a guiding role in acid fracturing design and construction, reduces construction difficulty and risk, improves construction efficiency, and ensures the effectiveness of acid fracturing construction and the seam net acid fracturing effect.
Description
Technical field
The present invention relates to oil-gas mining fields, and specifically, the present invention relates to a kind of carbonate reservoirs to stitch net acid fracturing side
Method.
Background technique
Carbonate reservoir typically contains intrinsic fracture and corrosion hole, and reservoir heterogeneity is strong, and intrinsic fracture is oil gas
Mainly preserve one of place.Due to the universal lower feature of domestic carbonate reservoir matrix permeability, the master of oil and gas flow
Wanting channel is intrinsic fracture.
Field practice proves that acid fracturing is the important technique measure of carbonate reservoir volume increase.Conventional acidfracturing treatment be with
For the purpose of making slit, full-bodied fracturing fluid and acid solution successively or alternately are injected to stratum, presses off stratum seam, and pass through increase
Acid solution viscosity reduces acid liquid loss and delays acid-rock reaction speed, increases acid-etched fracture length, is improved using closed acidization technique
The flow conductivity of acid-etched fracture, it is relatively easy that conventional acid fracturing reforming technology forms acid-etched fracture form.
Turning to acid fracturing is the acidfracturing treatment technology developed in recent years, it is to add in fracturing fluid or acid solution in the construction process
Enter diverting agent, force man-made fracture forced steering, but turns to ACID FRACTURING TECHNOLOGY and use full-bodied fracturing fluid and acid fluid system, shape more
At longer acid-etched fracture, it is therefore an objective to link up advantageous oil gas reservoir body.
Compound ACID FRACTURING TECHNOLOGY is to use for reference unconventional oil and gas fracture technology, by high viscosity fracturing fluid, acid solution and low-viscosity
Fracturing fluid, acid solution are repeatedly alternately injected, and longer high water conservancy diversion acid-etched fracture is formed.For deep layer ultra deep slit formation carbonate rock
Oil-gas reservoir carries out acidfracturing treatment and faces many difficult points: how the 1. general fine and close or low porosity permeability of matrix improves matrix to contribution to yield
Rate；2. intrinsic fracture is developed, how level two increases intrinsic fracture transformation degree, improves crack and reservoir to stress difference height
The contact area of matrix；3. it is high to bury depth, temperature, cause the speed of acid-rock reaction fast, acid-etched fracture penetration range is limited, cannot
The favorable reservoir body of effective communication pit shaft distant place.
Chinese patent CN103089228 discloses a kind of argillaceous dolomite ground surface crosslinking acid and takes sand acid fracturing method, for mud
Fracture condudtiviy reduces fast feature after matter dolomite acid fracturing, takes sandfilling acid-etched fracture using cross-linked acid, this method uses
Ground surface crosslinking acid, pit shaft frictional resistance is larger, and operation pressure is higher, while cross-linked acid takes the average sand of sand than 11.2%, sanding concentration
Low, acid corrosion fracture is insufficient；Cross-linked acid viscosity is high, reduces leak-off and retardative property is good, but it is indifferent to stitch net transformation.
Chinese patent CN101353958 discloses a kind of oil/gas well and is become sticky acid fracturing method with temperature control, using one kind with temperature
Degree increases the increased acid fluid system of acid solution viscosity, and viscosity increases after acid solution enters high-temperature stratum, and acid-rock reaction speed reduces, but should
Method is applied in conventional acid fracturing reforming technology, equally exists seam net and indifferent feature is transformed.
Chinese patent CN103590803 discloses a kind of solid acid acid frac process method, uses high viscosity pressure break first
Liquid seam reinjects normal-temperature water insoluble solids acid, enters solid acid in man-made fracture, in crack closure process after construction
In, it is increased by formation temperature and gradually releases acid solution with pressure effect, acid etching is carried out to earth formation deep, is injected in this method
Solid acid particles can constantly discharge acid solution corrosion rock stratum, but solid particle is larger to be difficult to enter in intrinsic fracture, simultaneously should
Method is also using conventional acid fracturing method design method, and seam net transformation ability is poor.
Summary of the invention
The purpose of the present invention is to provide a kind of carbonate reservoirs to stitch net acid fracturing method.
In order to achieve the above object, the present invention provides a kind of carbonate reservoirs to stitch net acid fracturing method, wherein the method packet
Include following steps:
A, the step of selection seam net acid fracturing well section；
B, Xiang Jingzhong successively low discharge capacity injection low-viscosity acid solution and the step of slippery water；
C, Xiang Jingzhong successively high discharge capacity injection low-viscosity slippery water and the step of acid solution；
D, the step of slippery water carries proppant or diverting agent is injected into well；
E, one or many step of repeating step c and step d；
F, into well the step of low discharge capacity injection displacement fluid.
The seam net ACID FRACTURING TECHNOLOGY of fracture type carbonate reservoir of the present invention has carried out various researchs.Pass through large-scale object
Mould experimental studies have found that, the hypotonic dense carbonate containing intrinsic fracture is not only able to form people using the slippery water of low-viscosity
Work major fracture, additionally it is possible to activate intrinsic fracture, form complicated fracture network.For seam net transformation ability in existing ACID FRACTURING TECHNOLOGY
Insufficient problem, the present inventor are thought by multiple groups experimental study: having intrinsic fracture carbonate reservoir, in horizontal well stress difference
Under the conditions of higher, complicated fracture network can be formed；The slippery water and acid solution of low-viscosity favorably stitch the formation of net；Change note
The product value (Q μ) for entering discharge capacity and liquid viscosity influences the complexity that seam is netted；Slippery water viscosity is certain, improves injection discharge capacity
Be conducive to the formation and extension of seam net.
Some specific embodiments according to the present invention, wherein when well section well complete for casing cementing, step a includes
Perforation and seam net acid fracturing are carried out to well section；When the well section is barefoot completion, step a includes that seam net acid fracturing is carried out to well section.
Wherein perforation can use any perforating methods of this field routine.
Some specific embodiments according to the present invention, wherein when well section well complete for casing cementing, step a includes
Selection carries out perforation and seam net acid fracturing containing intrinsic fracture well section；When the well section is barefoot completion, step a includes that selection contains
There is intrinsic fracture well section to carry out seam net acid fracturing.
Some specific embodiments according to the present invention, wherein step b includes being initially injected the low of 1-2 hole volume to stick
Acid solution is spent, then injects slippery water into well again, smooth water volume is 1-2 hole volume, and acid solution is squeezed into stratum
Step b injection low-viscosity acid solution is used to dissolving and cleaning nearly well plugging object, establishes the flow channel of pit shaft and reservoir,
Then slippery water is injected into well again, acid solution is squeezed into stratum.
In step c, slippery water is injected using high discharge capacity, effective seam net while cools down to reservoir, and realizes
The purpose that seam net extends.
For carbonate reservoir, especially deeper clefts type carbonate reservoir leak-off is big and temperature is high practical feelings
Condition carries out seam using high discharge capacity, fairly large slippery water and cools down to reservoir, and smooth water consumption scale is according to fracture software
Analog result determines that reservoir temperature is determined according to cracking temperature field analog result after injecting slippery water.
After forming acid-etched fracture network, operation pressure need to be higher than the lowest construction pressure value of acid etching seam net extension.Seam net expands
The lowest construction pressure value of exhibition is determined according to software analog result.Pressure prediction method is well known in the art.
In step d, it is inert fluid that injection slippery water, which carries proppant or diverting agent, slippery water, not with carbonate rock
Reaction carries proppant or diverting agent using slippery water, and the supporting role of proppant and the temporary stifled effect of diverting agent can be improved.
Some specific embodiments according to the present invention, wherein the low discharge capacity is 1.0m3/min-3.0m3/min；The height
Discharge capacity is the highest discharge capacity under the conditions of equipment safety pressure limiting.
Some specific embodiments according to the present invention, wherein the viscosity 10mPas-20mPa of the low-viscosity acid solution
s；The viscosity 3mPas-20mPas of low-viscosity slippery water.
Some specific embodiments according to the present invention, wherein the low-viscosity acid solution is resistance reducing acid.
The resistance reducing acid can be any resistance reducing acid commonly used in the art.
However some specific embodiments according to the present invention, wherein the resistance reducing acid formula is (to be with resistance reducing acid total weight
100%) :+1.0% demulsifier (DJ-10) of+2.0% corrosion inhibiter (DJ-04) of+0.2% friction reducer of 20% hydrochloric acid (DMJ130A)+
+ 1.0% ferrous stability (DJ-07) of 1.0% cleanup additive (DJ-02)+excess water.
The slippery water can be any slippery water commonly used in the art.
However some specific embodiments according to the present invention, wherein the slippery water formula is (to be with slippery water total weight
100%): slippery water formula :+1.0% cleanup additive (DJ-02) of+0.5% clay stabilizer (KCl) of 0.1% friction reducer (HPG)+
1.0% demulsifier (DJ-10)+excess water.
Some specific embodiments according to the present invention, wherein the mass concentration of the low-viscosity acid solution is 15%-20%.
Proppant partial size, proppant concentration and proppant used in amounts are determined according to acidizing simulation software analog result.
Some specific embodiments according to the present invention, wherein the proppant type is haydite or quartz sand, the support
Agent partial size is 40-70 mesh and/or 70-140 mesh.
Some specific embodiments according to the present invention, wherein when the Young's modulus of carbonate reservoir is greater than 60000MPa,
Proppant is carried using slippery water.
Some specific embodiments according to the present invention, wherein proppant is injected in a manner of slug, and slug amount is according to acid fracturing mould
Quasi- software analog result determines.Analogy method and the process that slug amount is determined by analog result are well known in the art.
Some specific embodiments according to the present invention, wherein when the Young's modulus of carbonate reservoir is less than 60000MPa,
Diverting agent is carried using slippery water.
Diverting agent type, diverting agent partial size, diverting agent concentration and diverting agent used in amounts are according to formation temperature and acidizing simulation
Software analog result determines.Analogy method and the process that above-mentioned design parameter is determined by analog result are that this field is ripe
Know.
Some specific embodiments according to the present invention, wherein the diverting agent is soluble-type diverting agent or degradable
Diverting agent.
Some specific embodiments according to the present invention, wherein step e includes one or many being alternately performed step c and step
Rapid d.
That is low-viscosity slippery water and low-viscosity acid solution replaces injection.
Specific alternately injection mode are as follows: [(+the 1 grade of low-viscosity acid solution+of the 1st grade of low-viscosity slippery water) (the 1st grade of slippery water
Carry proppant or diverting agent)]+[(+the 2 grade of low-viscosity acid solution of the 2nd grade of low-viscosity slippery water)+(the 2nd grade of slippery water carries branch
Support agent or diverting agent)] and+┈ ┈ [(the+the N grades of low-viscosity acid solution of N grades of low-viscosity slippery water)+(N grades of slippery water carry support
Agent or diverting agent)]+[the+the N+1 grades of low-viscosity acid solution of N+1 grades of low-viscosity slippery water], N takes 2,3 ....
The amount of slippery water used in step e, the amount of low-viscosity acid solution and whether need repeatedly to be implanted sequentially low-viscosity acid
The process and the required number being performed a plurality of times of liquid and slippery water, can be by those skilled in the art according to complexity
Results of fracture simulation result, reservoir geology condition and the specific acid fracturing method of the professional software (such as: Fracman) of results of fracture simulation function come
It determines.
Some specific embodiments according to the present invention, wherein proppant step e used during repeating step d
Or the amount of diverting agent, 1.2-1.5 times that used amount is last institute's usage amount is repeated every time.
That is, the amount of proppant used in step e or diverting agent, the 2nd grade is 1.2~1.5 times of the 1st grade, the 3rd
Grade is 1.2~1.5 times of the 2nd grade, and so on.
Some specific embodiments according to the present invention, wherein the displacement fluid is slippery water.
Some specific embodiments according to the present invention, wherein displacement fluid dosage is 2-3 times of hole volume.
Low discharge capacity injects displacement fluid, reduces flow velocity of the acid solution in seam net, improves acid etching and stitches net, especially near wellbore acid
The flow conductivity of erosion seam net.
Some specific embodiments according to the present invention, wherein the carbonate reservoir is slit formation carbonate reservoir.
In slit formation carbonate reservoir, the present invention turns to target to stitch acid-etched fracture network maximum in net acid fracturing, leads to
Seam net ACID FRACTURING TECHNOLOGY is crossed, forms the seam net system being interconnected with artificial major fracture, branch's seam and intrinsic fracture, to greatest extent
Volume is transformed in the seam net for improving acid-etched fracture, increases the flow conductivity of acid etching seam net.
The seam net that method of the invention is suitable for straight well, inclined shaft and horizontal well stitches net acid fracturing.
According to the method for the present invention, seam net acid fracturing, the especially deeper clefts type carbon for being mainly used in carbonate reservoir
The seam net acid fracturing of Carbonate Reservoir, can also be applied to the seam net of other lithology such as general carbonate reservoir, dolomite or reservoir
Acid fracturing, therefore the validity of seam net acid fracturing can be effectively improved, improve yield and stable yields period after carbonate reconstruction of oil and gas pools.
Method proposed by the present invention realizes large-scale acid-etched fracture network, improves the effective acid of acid fracturing to greatest extent
Long-term flow conductivity after losing crack transformation volume and pressing, improves the seam net acid fracturing effect and development degree of such reservoir, to the country
Outer deep carbonate reservoirs and the seam net acid fracturing of similar oil-gas reservoir, similar reservoir have preferable reference, to promotion state
The development of interior ACID FRACTURING TECHNOLOGY has positive impetus, is with a wide range of applications.
In conclusion the present invention provides a kind of carbonate reservoirs to stitch net acid fracturing method.Method of the invention has such as
Lower advantage:
1, the present invention is innovatively seam net acid fracturing method, and to realize, volume is transformed in effectively acid-etched fracture in seam net acid fracturing
Maximum turns to target, forms the seam net ACID FRACTURING TECHNOLOGY of carbonate rock hydrocarbon reservoir.Nearly well day is dredged using low discharge capacity low-viscosity acid solution
Right Fracture System uses extensive high discharge capacity slippery water as prepad fluid and activates intrinsic fracture, forms pressure-break net and reduces storage
Layer temperature, high discharge capacity injection low-viscosity acid solution etching pressure-break net form acid-etched fracture and stitch net, use diverting agent and slippery water
With the injection mode that replaces of acid solution, the volume and flow conductivity of acid etching seam net are improved；
2, method of the invention is acid fracturing design and directive function is played in construction, reduces difficulty of construction and risk, raising are applied
Work efficiency rate guarantees the validity and seam net acid fracturing effect of acid fracturing construction；
3, method of the invention, the present invention are practiced by seam net ACID FRACTURING TECHNOLOGY, can effectively solve current slit formation
Carbonate reservoir, especially two to horizontal stress difference it is high under the conditions of, fast, the sour rock of production decline is anti-after the pressure faced in acid fracturing
Many problems such as speed is fast, acid etching flow conductivity successively decreases rapidly, validity period is short are answered, to realize effectively changing to such reservoir
It makes, improves effect and stable production period after pressure；Be conducive to effective transformation to Carbonate Reservoir, especially deeper clefts type carbonate to store up
Layer；
4, the present invention passes through optimization and reasonable fit applications to liquid system, construction injection mode and entire construction technology
Optimization, improve the complexity degree in transformation crack, reach the major fracture of existing remote well, and the major fracture of different location is again mutual
Connected component seam and the slit system being connected to branch seam, realize large-scale acid-etched fracture network system, expand acid etching to greatest extent
The transformation volume in crack, improves the long-term flow conductivity of acid-etched fracture；
5, method of the invention is succinct, and scene is implemented convenient for operation, compared with current conventional acid fracturing measure and technique, nothing
Additional corollary apparatus need to be increased, slippery water cost is lower, and low-viscosity acid solution is at low cost, and entire construction technology cost is less than or approaches
Prevailing technology at present, cost efficiency effect are obvious；
6, the present invention relates to method for carbonate reservoir acid fracturing, especially deeper clefts type carbonate reservoir
The success rate and effective percentage of acid fracturing construction have important practical significance, and theoretical for carbonate reservoir acid fracturing improves and send out
Exhibition also has important theory significance.
Specific embodiment
Below by way of the beneficial effect of the specific embodiment implementation process that the present invention will be described in detail and generation, it is intended to which help is read
Reader more fully understands essence and feature of the invention, does not limit the scope of the present invention.
It should be noted that friction reducer commonly used in the art, corrosion inhibiter, demulsifier, cleanup additive, ferrous stability and
Clay stabilizer is used equally in the application.The viscosity and density of reagent described in following embodiment measure under the same conditions.
Embodiment 1
Acid fracturing conceptual design and field test are carried out using carbonate reservoir proposed by the present invention seam net acid fracturing method, with
For certain a well, hole volume 30.0m3, the complete well of casing cementing, the continuous well section length for having intrinsic fracture is 10m, operation pressure
Predict highest operational discharge capacity 10m under pressure limiting 90MPa3/ min, specific implementation method are as follows: 1. selection has intrinsic fracture well section perforation,
Perforating length 10m.2. smooth water density 1.0g/cm3, slippery water formula :+0.5% clay stabilizer of 0.1% friction reducer (HPG)
(KCl)+1.0% demulsifier (DJ-10) of+1.0% cleanup additive (DJ-02)+excess water, the concentration in formula are mass concentration.It is existing
Prepare slippery water, the viscosity 15mPas of slippery water in field.Resistance reducing acid density 1.1g/cm3, resistance reducing acid formula: 20% hydrochloric acid+
+ 1.0% cleanup additive (DJ- of+1.0% demulsifier (DJ-10) of+2.0% corrosion inhibiter (DJ-04) of 0.2% friction reducer (DMJ-130A)
02)+1.0% ferrous stability (DJ-07)+excess water, the concentration in formula are mass concentration.Extemporaneous preparation resistance reducing acid, drop
Hinder the viscosity 18mPas of acid.3. starting fracturing unit truck group, discharge capacity 2.2m3/ min is initially injected low-viscosity acid solution 50m3, then infuses
Enter slippery water 50m3.4. improving discharge capacity, quickly with 10m3The discharge capacity of/min injects 300m3Slippery water, with 10m3The discharge capacity of/min is infused
Enter 300m3Resistance reducing acid.5. injecting slippery water 50m3, the lysotype diverting agent of mesh containing 40-70 (GPT-120), diverting agent concentration 1.0kg/
m3(every 1m31.0kg diverting agent is added in slippery water).6. alternately injecting, specific injection mode is as follows: with 10m3The discharge capacity of/min
Inject [300m3Slippery water+300m3Resistance reducing acid+(50m3Slippery water, the lysotype diverting agent of mesh containing 40-70, diverting agent concentration
1.2kg/m3)]+[300m3Slippery water+300m3Resistance reducing acid+(50m3Slippery water, the lysotype diverting agent of mesh containing 40-70, diverting agent are dense
Spend 1.5kg/m3)].7. with 10m3The discharge capacity of/min injects 150m3Slippery water+150m3Resistance reducing acid.8. the stage of replacement is with 3.0m3/
The discharge capacity of min injects 90m3Slippery water, pressure drop is surveyed in termination of pumping to be terminated to construct.After stitching the implementation of net ACID FRACTURING TECHNOLOGY, daily oil production is seam net
2.7 times before acid fracturing.
Embodiment 2
By taking certain b well as an example, hole volume 21.7m3, barefoot completion, the well section length for having intrinsic fracture is 21m, construction pressure
Power predicts highest operational discharge capacity 11.5m under pressure limiting 90MPa3/ min, specific implementation method are as follows: 1. selection has continuous intrinsic fracture
Well section perforation, perforating length 15m.2. smooth water density 1.0g/cm3, slippery water formula: 0.08% friction reducer (HPG)+0.5%
+ 1.0% demulsifier (DJ-10) of+1.0% cleanup additive (DJ-02) of clay stabilizer (KCl)+excess water, the concentration in formula are matter
Measure concentration.Extemporaneous preparation slippery water, the viscosity 9mPas of slippery water.Resistance reducing acid density 1.1g/cm3, resistance reducing acid formula: 20%
+ 1.0% cleanup additive of+1.0% demulsifier (DJ-10) of+2.0% corrosion inhibiter (DJ-04) of+0.2% friction reducer of hydrochloric acid (DMJ-130A)
(DJ-02)+1.0% ferrous stability (DJ-07)+excess water, the concentration in formula are mass concentration.Extemporaneous preparation drop resistance
Acid, the viscosity 15mPas of resistance reducing acid.3. starting fracturing unit truck group, discharge capacity 1.5m3/ min is initially injected low-viscosity acid solution 30m3, so
Slippery water 30m is injected afterwards3.4. improving discharge capacity, quickly with 11.5m3The discharge capacity of/min injects 200m3Slippery water, with 11.5m3/min
Discharge capacity inject 150m3Resistance reducing acid.5. injecting slippery water 30m3, the haydite diverting agent of mesh containing 70-140, diverting agent concentration 1.5kg/m3
(every 1m31.5kg diverting agent is added in slippery water).6. alternately injecting, specific injection mode is as follows: with 11.5m3The discharge capacity of/min
Inject [200m3Slippery water+200m3Resistance reducing acid+(30m3Slippery water, the haydite diverting agent of mesh containing 70-140, diverting agent concentration 2.0kg/
m3)]+[250m3Slippery water+150m3Resistance reducing acid+(50m3Slippery water, the diverting agent of mesh containing 70-140, diverting agent concentration 2.4kg/
m3)].7. with 11.5m3The discharge capacity of/min injects 150m3Slippery water+100m3Resistance reducing acid.8. the stage of replacement is with 1.8m3The row of/min
Amount injection 50m3Slippery water, pressure drop is surveyed in termination of pumping to be terminated to construct.It stitches after net ACID FRACTURING TECHNOLOGY implemented, daily output tolerance reaches 55.2 ×
104m3/d。
Embodiment 3
By taking certain c well as an example, hole volume 45.2m3, barefoot completion, the well section length for having intrinsic fracture is 56m, construction pressure
Power predicts highest operational discharge capacity 13.5m under pressure limiting 120MPa3/ min, specific implementation method are as follows: 1. selection has continuous intrinsic fracture
Well section perforation, perforating length 23m.2. smooth water density 1.0g/cm3, slippery water formula: 0.1% friction reducer (HPG)+0.5%
+ 1.0% demulsifier (DJ-10) of+1.0% cleanup additive (DJ-02) of clay stabilizer (KCl)+excess water, the concentration in formula are matter
Measure concentration.Extemporaneous preparation slippery water, the viscosity 15mPas of slippery water.Resistance reducing acid density 1.1g/cm3, resistance reducing acid formula: 20%
+ 1.0% cleanup additive of+1.0% demulsifier (DJ-10) of+2.0% corrosion inhibiter (DJ-04) of+0.2% friction reducer of hydrochloric acid (DMJ-130A)
(DJ-02)+1.0% ferrous stability (DJ-07)+excess water, the concentration in formula are mass concentration.Extemporaneous preparation drop resistance
Acid, the viscosity 15mPas of resistance reducing acid.3. starting fracturing unit truck group, discharge capacity 1.5m3/ min injects low-viscosity acid solution 60m3, discharge capacity
3.0m3/ min injects slippery water 60m3.4. improving discharge capacity, quickly with 13.5m3The discharge capacity of/min injects 150m3Slippery water, with
13.5m3The discharge capacity of/min injects 150m3Resistance reducing acid.5. injecting slippery water 50m3, the lysotype diverting agent of mesh containing 70-140 (GPT-
120), diverting agent concentration 0.8kg/m3.6. alternately injecting, specific injection mode is as follows: with 13.5m3The discharge capacity of/min is injected
[150m3Slippery water+150m3Resistance reducing acid+(50m3Slippery water, the diverting agent of mesh containing 70-140, diverting agent concentration 1.2kg/m3)]+
[150m3Slippery water+150m3Resistance reducing acid+(50m3Slippery water, the diverting agent of mesh containing 70-140, diverting agent concentration 1.5kg/m3)]+
[150m3Slippery water+150m3Resistance reducing acid+(50m3Slippery water, the diverting agent of mesh containing 70-140, diverting agent concentration 2.0kg/m3)]。⑦
With 11.0m3The discharge capacity of/min injects 150m3Slippery water+150m3Resistance reducing acid.8. the stage of replacement is with 3.0m3The discharge capacity of/min is injected
100m3Slippery water, pressure drop is surveyed in termination of pumping to be terminated to construct.After stitching the implementation of net ACID FRACTURING TECHNOLOGY, day oil-producing 25t/d, daily gas 15.8 ×
104m3/d。
Claims (15)
1. a kind of carbonate reservoir stitches net acid fracturing method, wherein described method includes following steps:
A, the step of selection seam net acid fracturing well section；
B, Xiang Jingzhong successively low discharge capacity injection low-viscosity acid solution and the step of slippery water；
C, Xiang Jingzhong successively high discharge capacity injection low-viscosity slippery water and the step of acid solution；
D, the step of slippery water carries proppant or diverting agent is injected into well；
E, one or many step of repeating step c and step d；
F, into well the step of low discharge capacity injection displacement fluid.
2. according to the method described in claim 1, wherein, when well section well complete for casing cementing, step a includes selection day
Right fracture development well section carries out perforation and seam net acid fracturing；When the well section is barefoot completion, step a includes selection intrinsic fracture
Development well section carries out seam net acid fracturing.
3. according to the method described in claim 1, wherein, step b includes the low-viscosity acid for being initially injected 1-2 hole volume
Then liquid injects slippery water into well again, smooth water volume is 1-2 hole volume, and acid solution is squeezed into stratum.
4. according to the method described in claim 1, wherein, when the Young's modulus of carbonate reservoir is greater than 60000MPa, making
Proppant is carried with slippery water；When the Young's modulus of carbonate reservoir is less than 60000MPa, carried using slippery water temporarily stifled
Agent.
5. according to the method described in claim 1, wherein, the low discharge capacity is 1.0m3/min-3.0m3/min；The high discharge capacity
For the highest discharge capacity under the conditions of equipment safety pressure limiting.
6. according to the method described in claim 1, wherein, the viscosity range 10mPas-20mPas of the low-viscosity acid solution；
The range of viscosities 3mPas-20mPas of low-viscosity slippery water.
7. according to the method described in claim 6, wherein, the low-viscosity acid solution is resistance reducing acid.
8. according to the method described in claim 1, wherein, the mass concentration of the low-viscosity acid solution is 15%-20%.
9. proppant partial size is according to the method described in claim 1, wherein, the proppant type is haydite or quartz sand
40-70 mesh and/or 70-140 mesh.
10. according to the method described in claim 1, wherein, the diverting agent is that soluble-type diverting agent or degradable temporarily block up
Agent.
11. according to the method described in claim 1, wherein, step e includes one or many being alternately performed step c and step d.
12. according to the method described in claim 1, wherein, proppant step e used during repeating step d or temporarily
The amount of blocking agent repeats 1.2-1.5 times that used amount is last institute's usage amount every time.
13. according to the method described in claim 1, wherein, the displacement fluid is slippery water.
14. according to the method described in claim 1, wherein, displacement fluid dosage is 2-3 times of hole volume.
15. according to the method described in claim 1, wherein, the carbonate reservoir is slit formation carbonate reservoir.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439528A (en) * | 2019-09-06 | 2019-11-12 | 陕西延长石油（集团）有限责任公司 | A kind of carbon dioxide acid fracturing method for hypotonic heterogeneous carbonate gas reservoir |
| CN110714747A (en) * | 2019-10-21 | 2020-01-21 | 中国石油化工股份有限公司 | Three-step control method for improving shale transformation volume |
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| CN115126467A (en) * | 2022-07-26 | 2022-09-30 | 西南石油大学 | Three-dimensional acid fracturing method for long-well-section carbonate reservoir |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016148698A1 (en) * | 2015-03-17 | 2016-09-22 | Halliburton Energy Services, Inc. | Metalate-based additives for use in subterranean formations |
| CN106321054A (en) * | 2015-07-03 | 2017-01-11 | 中国石油化工股份有限公司 | Acid fracturing method of carbonate rock reservoir |
| CN108661617A (en) * | 2018-05-18 | 2018-10-16 | 北京石油化工学院 | A kind of fracturing process for increasing high-temperature stratum and manually stitching net complexity |
| CN109296350A (en) * | 2018-10-19 | 2019-02-01 | 中石化石油工程技术服务有限公司 | A kind of overstocked cracking method of the seam dictyosome of carbonate reservoir |
-
2019
- 2019-05-27 CN CN201910444237.1A patent/CN110159243B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016148698A1 (en) * | 2015-03-17 | 2016-09-22 | Halliburton Energy Services, Inc. | Metalate-based additives for use in subterranean formations |
| CN106321054A (en) * | 2015-07-03 | 2017-01-11 | 中国石油化工股份有限公司 | Acid fracturing method of carbonate rock reservoir |
| CN108661617A (en) * | 2018-05-18 | 2018-10-16 | 北京石油化工学院 | A kind of fracturing process for increasing high-temperature stratum and manually stitching net complexity |
| CN109296350A (en) * | 2018-10-19 | 2019-02-01 | 中石化石油工程技术服务有限公司 | A kind of overstocked cracking method of the seam dictyosome of carbonate reservoir |
Non-Patent Citations (1)
| Title |
|---|
| 张以明等: "超高温超深非均质碳酸盐岩储层地质工程一体化体积改造技术", 《石油学报》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439528A (en) * | 2019-09-06 | 2019-11-12 | 陕西延长石油（集团）有限责任公司 | A kind of carbon dioxide acid fracturing method for hypotonic heterogeneous carbonate gas reservoir |
| CN110439528B (en) * | 2019-09-06 | 2021-12-14 | 陕西延长石油（集团）有限责任公司 | Carbon dioxide acid fracturing method for low-permeability heterogeneous carbonate rock gas reservoir |
| CN110714747A (en) * | 2019-10-21 | 2020-01-21 | 中国石油化工股份有限公司 | Three-step control method for improving shale transformation volume |
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| CN113445976B (en) * | 2020-03-25 | 2023-09-26 | 中国石油化工股份有限公司 | Fracturing method and application of high-plasticity stratum |
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