CN106246150B - A kind of oil field compression fracture remodeling method - Google Patents
A kind of oil field compression fracture remodeling method Download PDFInfo
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- CN106246150B CN106246150B CN201610828725.9A CN201610828725A CN106246150B CN 106246150 B CN106246150 B CN 106246150B CN 201610828725 A CN201610828725 A CN 201610828725A CN 106246150 B CN106246150 B CN 106246150B
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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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
Abstract
The present invention provides a kind of oil field compression fracture remodeling methods.This method selects displacement of reservoir oil active water according to reservoir wettability, the minimum fracture interval for calculating the fracture interval of effective displacement pressure system using simulation softward and stress being avoided to disturb, and obtains optimal fracture interval with reference to optimization；Carry out that horizontal well first segment adds the conventional fracturing reform of proppant and second segment is not added with the extensive displacement of reservoir oil active water fracturing reform of proppant, and to follow-up well section alternately two kinds of fracturing technologies, after pressure break, closing well open flow after crack closure produces.The present invention is combined using displacing phase between subdivision cutting fracturing reform and fracturing fracture seam, and long range displacement between traditional well is changed into short distance displacement between the seam of the same well and layer, beneficial to the foundation of displacement pressure system, can greatly improve recovery ratio；Due to being greatly reduced for proppant and fracturing fluid gel dosage so that fracturing reform cost is greatly reduced, and has quality, profitable exploitation to provide a kind of important method for hypotonic, fine and close reserves.
Description
Technical field
The invention belongs to technical field of petroleum extraction, are related to a kind of oil field compression fracture remodeling method.
Background technology
Hypotonic, compact reservoir has become the most real and most important petroleum resources in China and has taken over field, uses for reference North America shale
Gas " horizontal well+volume fracturing transformation " technology, China successfully realizes Song-liao basin, Ordos Basin, Bohai gulf basin etc.
The effective exploitation of fine and close oilfield establishes 2,000,000 tons of the size of capacity.But it is fast that the exploitation of such reservoir is faced with production decline
The bottlenecks problem such as (3 annual outputs successively decrease up to 85%), recovery ratio low (natural energy recovery percent of reserves 5%-8%), development cost height.
At present, there are mainly three types of the technical measures used for the exploitation of hypotonic compact reservoir：(1) horizontal well in segments is used
Pressure break combination waterflooding extraction pattern solves the problems, such as low permeability and ultra-low permeability reservoirs pressurize, the displacement of reservoir oil substantially.Such as " extra-low permeability oil
Hide pressure break horizontal well development response evaluation " (once saved from damage, Cheng Linsong, Li Chunlan etc., petroleum journal, 2010.31 (5)：791-
796) development mode that ultra-low permeability reservoir is realized in the water filling of horizontal well fracturing combination straight well, is analyzed.Hypotonic compact reservoir
The problem of (generally more than 100m) excessive due to well pattern, well spacing, effective displacement pressure system are difficult to effectively establish, and conventional waterflooding is opened
It is poor to send out effect, and development cost is high.(2) it is using pressure break energization, the methods of improving recovery ratio, such as publication number is replaced using imbibition
It discloses for the patent application of CN 105134158A and transforms to form complex fracture network by horizontal well volume fracturing, by excellent
Change the fracturing fluid system of displacement of reservoir oil permutation function, then play fracturing fluid and the advantage of the huge contact area in stratum, utilize imbibition
The technical solution for improving reservoir recovery ratio is realized in displacement, but the successful needs foundation of the technology can form the base of complex fracture
On plinth, for the relatively low reservoir of development degree of micro cracks in oil, fracturing fluid enter after reservoir return discharge capacity is big, flowback rate soon with reservoir base
Plinth area is small, and the effect which is played just is had a greatly reduced quality.(3) using note CO2It handles up and improves recovery ratio, such as " compact oil reservoir
Staged fracturing horizontal well carbon dioxide injection is handled up physical analogy " (Yang Zhengming, Liu Xuewei, Zhang Zhonghong etc., Petroleum finance,
2015,36 (6)：724-729) the technical solution disclosed in a text is studied and improves recovery ratio by CO_2 stimulation mode
Method, research shows that this method drives recovery percent of reserves than elasticity and improves 12.5%, but this method equally exists defect, in " titanium dioxide
Carbon drives reservoir blocking mechanism experimental analysis " (Zhou Tuo, Liu Xuewei, Yang Zhengming etc., Petroleum finance, 2015,42 (4)) one
Wen Zhong, research show that extraction phenomenon occurs after being contacted with crude oil for carbon dioxide, after the light components extraction in crude oil, allow again
Matter component is deposited on plugging hole in reservoir and shouts, and causes the reduction of Reservoir Seepage ability, can influence the development effectiveness in later stage.
In conclusion for intrinsic fracture agensis, volume fracturing is difficult to be formed the reservoir of complex fracture, how to improve production
Amount improves recovery ratio, while it is this field bottleneck problem urgently to be resolved hurrily to reduce development cost.
The content of the invention
In order to solve hypotonic, compact reservoir fracturing reform recovery ratio is low, the of high cost difficulty of current intrinsic fracture agensis
Topic, it is an object of the invention to provide a kind of oil field compression fracture remodeling methods, can pass through energy storage between fracturing reform and fracturing fracture
Displacing phase combines, and long range displacement between traditional well is changed into short distance displacement between stitching, so as to fulfill same well pressure break-water filling-
The integration of displacement-oil recovery synchronizes.
The purpose of the present invention is achieved by the following technical programs：
A kind of oil field compression fracture remodeling method, comprises the following steps：
Step 1: according to the wettability characteristics of reservoir, select with raising rock core matrix effective permeability and have simultaneously
Standby washing oil, the displacement of reservoir oil active water of wettability modification function；
Step 2: according to the physical property of reservoir and mobility feature, using the displacement of reservoir oil active water in step 1, numerical reservoir is utilized
Simulation softward CMG and/or Eclipse calculate the fracture interval that can establish effective displacement pressure system；
Step 3: according to the rock mechanics parameters and parameters and earth stress of reservoir, using the displacement of reservoir oil active water in step 1, profit
The minimum fracture interval that stress is avoided to disturb is calculated with hydraulic fracturing optimizing Design Software StimPlan；
Step 4: the fracture interval that can establish effective displacement pressure system and step 3 that are calculated in step 2 are fallen into a trap
That calculates avoids the minimum fracture interval that stress disturbs from obtaining optimal fracture interval with reference to optimization；
Step 5: being segmented using single hop, cutting transform pattern carries out horizontal well first segment plus the conventional pressure break of proppant changes
It makes, forms the crack with high flow conductivity；
Step 6: using the displacement of reservoir oil active water in step 1, according to Step 2: step 3 and step 4 computational methods, meter
Calculate the optimal fracture interval of horizontal well second segment；Then using the single hop subdivision cutting transform pattern identical with first segment transformation
To horizontal well second segment be not added with the extensive displacement of reservoir oil active water fracturing reform of proppant, greatly improve pressure and reduction in seam
The row of returning of fluid in seam；Then using the displacement of reservoir oil active water in step 1, according to Step 2: the calculating side of step 3 and step 4
Method calculates the optimal fracture interval of the follow-up well section of horizontal well；To follow-up well section according to add proppant conventional fracturing reform and
It is not added with extensive two kinds of techniques of displacement of reservoir oil active water fracturing reform of proppant alternately sequentially, until pressure break terminates, and ensures
The conventional fracturing reform of final transformation Duan Weijia proppants；
Step 7: carrying out closing well processing after pressure break, after fracturing fracture closure, control oil nozzle carries out open flow production.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the proppant can be ceramsite propping agent.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the granularity of the ceramsite propping agent can be 20-70 mesh.
In above-mentioned oil field compression fracture remodeling method, it is preferable that in step 4, the method with reference to optimization is：When being calculated
The fracture interval that can establish effective displacement pressure system be less than avoid stress disturb minimum fracture interval when, so as to building
The fracture interval of vertical effective displacement pressure system is as optimal fracture interval；When what is be calculated can establish effective displacement pressure
When the fracture interval of system is more than the minimum fracture interval that stress is avoided to disturb, the minimum fracture interval to avoid stress interference is made
For optimal fracture interval.
In above-mentioned oil field compression fracture remodeling method, in step 1, reservoir wettability mainly includes wet water, mixing wetting and oil
It is wet, oil water interfacial tension mainly is reduced by adding in surfactant into reservoir if reservoir is wet for water, reduces flow resistance,
So that note adopts the foundation of pressure system, preferred displacement of reservoir oil active water is alkyl sulfonic acid salt form surfactant, if reservoir is mixed
It closes wetting or oil is wet, then need to add in the surfactant that can change rock wettability, realize wettability reversal, improve imbibition and put
Efficiency is changed, preferred displacement of reservoir oil active water is beet alkaline surfactant.
In above-mentioned oil field compression fracture remodeling method, in step 2, the physical property of reservoir is the effective permeability of reservoir；Reservoir
Mobility be the effective permeability of reservoir and the ratio of fluid viscosity.
In above-mentioned oil field compression fracture remodeling method, in step 3, the rock mechanics parameters of reservoir mainly include Poisson's ratio and
Young's modulus etc.；The parameters and earth stress of reservoir mainly includes minimum horizontal principal stress and horizontal stress difference etc..
In above-mentioned oil field compression fracture remodeling method, it is preferable that the displacement of reservoir oil active water can be surfactant and/or nanometer
The solution of particle.
In above-mentioned oil field compression fracture remodeling method, surfactant can be conventional surfactant, it is preferable that the table
Face activating agent can include betaine type amphoteric surfactant and/or alkyl sulfonic acid salt form surfactant.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the nano particle can include carbon nano-particle and/or silicon is received
Rice grain, the nano particle diameter can be 5-80nm.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the time of closing well processing is to add the conventional pressure break of proppant
The proppant of transformation section does not flow back as standard.
In above-mentioned oil field compression fracture remodeling method, it is preferable that described plus proppant conventional fracturing reform can include frozen glue
Sand fracturing transformation, displacement of reservoir oil active water combination frozen glue sand fracturing transformation or linear cementing conjunction frozen glue sand fracturing transformation.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the completion tool that the single hop subdivision cutting transform pattern uses
For the completion tool of well cementing casing pipe sliding sleeve class, can include pressure balance sliding sleeve junction belt underseal coiled tubing completion tool or
Intelligent control pitching sliding sleeve completion tool.
In above-mentioned oil field compression fracture remodeling method, used completion tool is completion tool commonly used in the art.
In above-mentioned oil field compression fracture remodeling method, the single hop subdivision cutting transform pattern is every grade in the multistage transformation of horizontal well
Only transform the transform pattern of a crack.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the extensive displacement of reservoir oil activity hydraulic pressure of proppant is not added with described in progress
When splitting transformation, 1.1-1.3 times that the requirement of pressure in seam reaches original formation pressure for pressure in seam is greatly improved.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the extensive displacement of reservoir oil activity hydraulic pressure of proppant is not added with described in progress
When splitting transformation, the instrument of the row of returning of fluid in seam is reduced using switchable sliding sleeve instrument, it, will be switchable after fracturing reform
Sliding sleeve closes or to transformation section injection diverting agent closure crack；Preferably, the diverting agent temporarily blocks up for oil-soluble resin class
Agent.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the extensive displacement of reservoir oil activity hydraulic pressure of proppant is not added with described in progress
When splitting transformation, in the case where switchable sliding sleeve instrument or diverting agent closure can not be used, the side of the row of returning of fluid in seam is reduced
Method is closing well processing time in increase step 7, it is ensured that the crack closure of extensive displacement of reservoir oil active water injection stage.
In above-mentioned oil field compression fracture remodeling method, when carrying out fracturing reform, it is desirable that horizontal well first segment and final stage change
It makes and carries out plus the hydraulic fracturing of proppant transformation, to give full play to the effect of displacement between crack.
In above-mentioned oil field compression fracture remodeling method, optimal fracture interval is to consider seepage field interference and the stress field of reservoir
Interference.
The oil field compression fracture remodeling method of the present invention is combined by energy storage displacing phase between fracturing reform and fracturing fracture, by tradition
Well between long range displacement be changed into seam between short distance displacement, realize integration, the synchronization of same well pressure break-water filling-displacement-oil recovery
Change.Hypotonic, compact reservoir fracturing transformation effect and recovery ratio can be improved.
Oil field compression fracture remodeling method provided by the invention has the following advantages：
(1) combined, will be over long distances driven between traditional well using displacing phase between subdivision cutting fracturing reform and fracturing fracture seam
It is changed into short distance displacement (＜ 40m) between the seam of the same well and layer for (＞ 100m), is conducive to the foundation of displacement pressure system, it can
Greatly improve recovery ratio；
(2) the conventional fracturing reform for adding proppant and the extensive displacement of reservoir oil active water fracturing reform phase for being not added with proppant are used
With reference to remodeling method, considerably reduce the dosage of proppant；Gelled fracturing fluid is replaced using a large amount of displacement of reservoir oil active waters, is used
Displacement pressure system is established between being stitched with well instead of flooding pattern, development cost can be greatly reduced, have matter for hypotonic, compact reservoir
Amount, efficient exploitation provide a kind of important method.
Description of the drawings
Fig. 1 is to optimize displacement of reservoir oil active water in embodiment to improve displacement efficiency schematic diagram；
Fig. 2 is different surfaces activating agent washing oil effect block diagram in embodiment；
Fig. 3 be embodiment in can realize seam between displacement it is intersegmental away from optimization schematic diagram；
Fig. 4 is (left figure fracture interval 30m, the right side of horizontal well crack stress interference optimization fracture interval schematic diagram in embodiment
Figure fracture interval 40m)；
Fig. 5 is that displacement schematic diagram between fracturing fracture seam is cut in horizontal well subdivision in embodiment.
Specific embodiment
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but it is not intended that the present invention can practical range restriction.Institute in following embodiments
The experiment reagent and experimental method used is this field conventional reagent and conventional method unless otherwise specified.
Embodiment
A kind of oil field compression fracture remodeling method is present embodiments provided, (the well reservoir is intrinsic fracture agensis using certain well
Hypotonic, compact reservoir) exemplified by carry out stitching a displacement fracturing reform, comprise the following steps：
Step 1: by showing that core wettability test the reservoir of this well for mixing wetting characteristics, passes through experiment test
It is preferred that can effectively reduce interfacial tension reduces fluid neuron network resistance, and it can realize the betaine type amphoteric table of wettability modification
Face activating agent, while inorganic salts NaCl (addition is suitably adjusted according to actual conditions) is added in order to improve oil displacement efficiency, as
Displacement of reservoir oil active water.As shown in Figure 1, after adding in displacement of reservoir oil active water, fluid displacement distance is significantly increased.
Fig. 2 gives the displacement efficiency of different type surfactant and nano particle, wherein cation surface activating
Agent is quaternary ammonium surfactant, anion surfactant is alkyl sulfonic acid salt surfactant, amphoteric surfactant
For beet alkaline surfactant, nanometer micro emulsion be silicon nano material or carbon nanomaterial, salt are KCl or NaCl.
Step 2: this well is fine and close oil-gas reservoir, the permeability of reservoir is 0.2mD and mobility is 0.1mD/mPas, is started
Using the displacement of reservoir oil active water in step 1, effective drive is calculated using CMG reservoir numerical simulation softwares by barometric gradient 0.1MPa/m
For the fracture interval of pressure system；As shown in figure 3, effective displacement pressure system can be established for permeability 0.2mD reservoirs
Fracture interval is 30m.
Step 3: the rock mechanics parameters according to this well reservoir：Young's modulus 30000MPa, Poisson's ratio 0.21；Crustal stress
Parameter：Minimum horizontal principal stress 55MPa, horizontal stress difference 8MPa；Construction parameter：The displacement of reservoir oil activity of fluid injection scale step 1 optimization
Water 1200m3, gelled fracturing fluid 600m3, add sand 50m3, operational discharge capacity 6m3/ min utilizes hydraulic fracturing optimizing Design Software
StimPlan calculates the minimum fracture interval that stress is avoided to disturb；In the present embodiment, calculating avoids the minimum that stress disturbs
Fracture interval is 35m.
Step 4: as shown in Figure 4, it is contemplated that the fracture interval of effective displacement pressure system is established as 30m, less than avoid should
The minimum fracture interval 35m of power interference, therefore, the fracture interval that combining step two and step 3 obtain, optimization obtains optimal split
Seam spacing is 30m, while displacement of reservoir oil active water stage fracturing fluid scale 1100m3, operational discharge capacity 5m3/min。
Step 5: segmenting cutting transform pattern using single hop, used completion tool is pressure balance sliding sleeve junction belt
The coiled tubing completion tool of underseal carries out horizontal well first segment to add the normal of ceramic proppant (size specification is 20-40 mesh)
Advise fracturing reform (construction parameter：Displacement of reservoir oil active water 1100m in step 13, gelled fracturing fluid 600m3, add sand 50m3, construction row
Measure 5-6m3/ min), the crack with high flow conductivity is formed, in the present embodiment, fracture condudtiviy reaches 30Dcm.
Step 6: using the displacement of reservoir oil active water in step 1, according to Step 2: step 3 and step 4 computational methods, meter
The optimal fracture interval of horizontal well second segment is calculated, in the present embodiment, the optimal fracture interval of calculating is 30m；Then single hop is used
Subdivision cutting transform pattern to horizontal well second segment be not added with the extensive displacement of reservoir oil active water fracturing reform of proppant, and single hop drives
Oily active water reservoir quantity is 1100m3, 1.16 times that pressure pressure in stitching in seam reaches original formation pressure are greatly improved, and is pressed
Displacement of reservoir oil active water not row of returning or the row of returning less in requirement seam after splitting；Then to follow-up well section according to adding ceramic proppant (size specification
For 20-40 mesh) conventional fracturing reform and be not added with extensive two kinds of techniques of displacement of reservoir oil active water fracturing reform of proppant and sequentially hand over
For progress, until pressure break terminates, and ensures the conventional fracturing reform of finally transformation Duan Weijia proppants, to give full play between seam
The effect of displacement.
Step 7: carrying out the closing well processing of a period of time after pressure break, displacement of reservoir oil active water is carried out using switchable sliding sleeve
Section closure well is transformed, injects oil-soluble resin class diverting agent, closed-in time main basis plus ceramic proppant fracturing reform section
Ceramic proppant does not flow back as standard, treats that gelled fracturing fluid starts the row of returning, setting time 4h after breaking gel, while requirement is producing
Stage oil nozzle is controlled in 2mm or so, is produced using pressurize, and big producing pressure differential is avoided to injure and cause the stress sensitive on stratum
In-place oil degassing influences later stage production, and production process is as shown in Figure 5.Fig. 5 drives between horizontal well subdivision cutting fracturing fracture seam
For schematic diagram, wherein, black is ceramic proppant fracturing fracture in figure, and white is displacement of reservoir oil active water fracturing fracture.
A kind of hypotonic, compact reservoir provided using this embodiment cuts the skill of displacement raising recovery ratio between pressure-break closely
Art method, after ensureing to press in the case of initil output myopia, since the foundation of displacement frac system can improve recovery ratio
6%-8%, simultaneously because proppant and fracturing fluid gel dosage are greatly reduced so that fracturing reform cost is greatly reduced, and is
Hypotonic, fine and close reserves have quality, profitable exploitation to provide a kind of important method.
In conclusion oil field compression fracture remodeling method provided by the invention, using subdivision cutting fracturing reform and fracturing fracture
Displacing phase combines between seam, and long range displacement between traditional well is changed into short distance displacement between the seam of the same well and layer, is conducive to drive
For the foundation of pressure system, recovery ratio can be greatly improved；Simultaneously because proppant and fracturing fluid gel dosage are greatly reduced,
So that fracturing reform cost is greatly reduced, there are quality, profitable exploitation to provide a kind of important method for hypotonic, fine and close reserves.
Claims (14)
1. a kind of oil field compression fracture remodeling method, comprises the following steps：
Step 1: according to the wettability characteristics of reservoir, select with raising rock core matrix effective permeability and be provided simultaneously with washing
Oil, the displacement of reservoir oil active water of wettability modification function；
Step 2: according to the physical property of reservoir and mobility feature, using the displacement of reservoir oil active water in step 1, reservoir numerical simulation is utilized
Software CMG and/or Eclipse calculate the fracture interval that can establish effective displacement pressure system；
Step 3: according to the rock mechanics parameters and parameters and earth stress of reservoir, using the displacement of reservoir oil active water in step 1, water is utilized
Force split optimizing Design Software StimPlan calculate avoid stress disturb minimum fracture interval；
Step 4: it will calculate in the fracture interval and step 3 that can establish effective displacement pressure system that are calculated in step 2
The minimum fracture interval that stress disturbs is avoided to obtain optimal fracture interval with reference to optimization；
Step 5: segmenting cutting transform pattern using single hop carries out horizontal well first segment the conventional fracturing reform for adding proppant,
Form the crack with high flow conductivity；
Step 6: using the displacement of reservoir oil active water in step 1, according to Step 2: step 3 and step 4 computational methods, calculate
The optimal fracture interval of horizontal well second segment；Then using the single hop subdivision cutting transform pattern identical with first segment transformation to water
Horizontal well second segment be not added with the extensive displacement of reservoir oil active water fracturing reform of proppant, greatly improves pressure in seam and reduces in seam
The row of returning of fluid；Then using the displacement of reservoir oil active water in step 1, according to Step 2: the computational methods of step 3 and step 4,
Calculate the optimal fracture interval of the follow-up well section of horizontal well；Follow-up well section according to the conventional fracturing reform for adding proppant and is not added with
Extensive two kinds of techniques of displacement of reservoir oil active water fracturing reform of proppant sequentially alternately, until pressure break terminates, and ensure final
Transform the conventional fracturing reform of Duan Weijia proppants；
Step 7: carrying out closing well processing after pressure break, after fracturing fracture closure, control oil nozzle carries out open flow production.
2. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The proppant is ceramsite propping agent.
3. oil field compression fracture remodeling method according to claim 2, it is characterised in that：The granularity of the ceramsite propping agent is
20-70 mesh.
4. oil field compression fracture remodeling method according to claim 1, which is characterized in that in step 4, with reference to the side of optimization
Method is：When the fracture interval that can establish effective displacement pressure system being calculated is less than the minimum crack that stress is avoided to disturb
During spacing, so as to establishing the fracture interval of effective displacement pressure system as optimal fracture interval；It can when what is be calculated
When establishing the fracture interval of effective displacement pressure system more than the minimum fracture interval for avoiding stress interference, disturbed to avoid stress
Minimum fracture interval as optimal fracture interval.
5. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The displacement of reservoir oil active water is surface-active
Agent and/or the solution of nano particle.
6. oil field compression fracture remodeling method according to claim 5, it is characterised in that：The surfactant includes glycine betaine
Type surfactant and/or alkyl sulfonic acid salt form surfactant.
7. oil field compression fracture remodeling method according to claim 5, it is characterised in that：The nano particle includes carbon nanometer
Grain and/or nano silicon particles, the nano particle diameter are 5-80nm.
8. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The time of the closing well processing is propped up with adding
The proppant for supportting the conventional fracturing reform section of agent does not flow back as standard.
9. oil field compression fracture remodeling method according to claim 1, it is characterised in that：Described plus proppant conventional pressure break changes
It makes including frozen glue sand fracturing transformation, displacement of reservoir oil active water combination frozen glue sand fracturing transformation or linear cementing conjunction frozen glue sand fracturing
Transformation.
10. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The single hop subdivision cutting transformation mould
The completion tool that formula uses includes the continuous oil of pressure balance sliding sleeve junction belt underseal for the completion tool of well cementing casing pipe sliding sleeve class
Pipe completion tool or intelligent control pitching sliding sleeve completion tool.
11. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The big of proppant is not added with described in progress
During scale displacement of reservoir oil active water fracturing reform, greatly improve the requirement of pressure in seam and reach original formation pressure for pressure in seam
1.1-1.3 again.
12. oil field compression fracture remodeling method according to claim 1, it is characterised in that：The big of proppant is not added with described in progress
During scale displacement of reservoir oil active water fracturing reform, the instrument for reducing the row of returning of fluid in seam uses switchable sliding sleeve instrument；Change in pressure break
After making, switchable sliding sleeve is closed or to transformation section injection diverting agent closure crack.
13. oil field compression fracture remodeling method according to claim 12, it is characterised in that：The diverting agent is oil-soluble resin
Class diverting agent.
14. oil field compression fracture remodeling method according to claim 12, it is characterised in that：The big of proppant is not added with described in progress
During scale displacement of reservoir oil active water fracturing reform, in the case where switchable sliding sleeve instrument or diverting agent closure can not be used, seam is reduced
The time that the method for the row of returning of interior fluid is handled for closing well in increase step 7, it is ensured that extensive displacement of reservoir oil active water injection stage
Crack closure.
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| CN113187456A (en) * | 2021-05-13 | 2021-07-30 | 捷贝通石油技术集团股份有限公司 | Process flow for old well energizing group repeated fracturing |
| CN114439392A (en) * | 2022-01-24 | 2022-05-06 | 延长油田股份有限公司南泥湾采油厂 | Oil displacement type slickwater well-flushing plug-removal construction method |
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