CN106246150A - Oil field fracturing transformation method - Google Patents
Oil field fracturing transformation method Download PDFInfo
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- CN106246150A CN106246150A CN201610828725.9A CN201610828725A CN106246150A CN 106246150 A CN106246150 A CN 106246150A CN 201610828725 A CN201610828725 A CN 201610828725A CN 106246150 A CN106246150 A CN 106246150A
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- 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
-
- 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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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Abstract
The invention provides an oil field fracturing transformation method. The method comprises the steps of selecting oil displacement active water according to reservoir wettability, calculating the fracture spacing of an effective displacement pressure system and the minimum fracture spacing for avoiding stress interference by using simulation software, and obtaining the optimal fracture spacing by combining optimization; and performing conventional fracturing modification of a first section of the horizontal well with a proppant and large-scale oil displacement active water fracturing modification of a second section without the proppant, alternately performing two fracturing processes on subsequent well sections, and closing the well after fracturing is finished, and performing open flow production after the fracture is closed. According to the invention, the subdivision cutting fracturing modification and the fracturing fracture joint displacement are combined, the traditional long-distance displacement between wells is converted into short-distance displacement between the same layer of the same well, the establishment of a displacement pressure system is facilitated, and the recovery ratio can be greatly improved; the use amount of the propping agent and the gel of the fracturing fluid is greatly reduced, so that the cost of fracturing modification is greatly reduced, and an important method is provided for the development of low permeability, compact reserve volume, high quality and benefit.
Description
Technical field
The invention belongs to technical field of petroleum extraction, relate 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 of China and has taken over field, uses for reference North America shale
Gas " horizontal well+volume fracturing transformation " technology, China the most successfully realizes Song-liao basin, Ordos Basin, Bohai gulf basin etc.
The effective exploitation of fine and close oilfield, establishes the size of capacity of 2,000,000 tons.But it is fast that the exploitation of this type of reservoir is faced with production decline
The bottleneck difficult problems such as (3 annual productions are successively decreased and reached 85%), recovery ratio low (natural energy recovery percent of reserves 5%-8%), development cost height.
The technical measures used currently for the exploitation of hypotonic compact reservoir mainly have three kinds: (1) uses horizontal well in segments
Pressure break combines the problem that waterflooding extraction pattern solves low permeability and ultra-low permeability reservoirs pressurize, the displacement of reservoir oil substantially.Such as " extra-low permeability oil
Hide frac water horizontal well development response evaluation " (once saved from damage, Cheng Linsong, Li Chunlan etc., petroleum journal, 2010.31 (5): 791-
796), analyze staged fracturing of horizontal well to combine straight well water filling and realize the development mode of ultra-low permeability reservoir.Hypotonic compact reservoir
Due to well pattern, the problem of well spacing excessive (generally more than 100m), effective displacement pressure system is difficult to effectively set up, and conventional waterflooding is opened
Send out weak effect, and development cost is high.(2) it is to use pressure break energization, utilizes imbibition displacement to improve the methods such as recovery ratio, such as publication number
Patent application for CN 105134158A discloses by horizontal well volume fracturing transformation formation complex fracture network, by excellent
Change the fracturing fluid system of displacement of reservoir oil permutation function, then play the advantage of the fracturing fluid contact area huge with stratum, utilize imbibition
Displacement realizes improving the technical scheme of reservoir recovery ratio, but the successful needs of this technology are set up at the base that can form complex fracture
On plinth, for the reservoir that development degree of micro cracks in oil is relatively low, fracturing fluid returns after entering reservoir that discharge capacity is big, flowback rate fast and reservoir base
Plinth area is little, and the effect that this technology is played just is had a greatly reduced quality.(3) note CO is used2Handle up raising recovery ratio, such as " compact oil reservoir
Staged fracturing horizontal well carbon dioxide injection is handled up physical modeling " (Yang Zhengming, Liu Xuewei, Zhang Zhonghong etc., Petroleum finance,
2015,36 (6): 724-729) technical scheme disclosed in a literary composition, research improves recovery ratio by CO_2 stimulation mode
Method, research shows that the method is driven recovery percent of reserves than elasticity and improved 12.5%, but the 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 shows that carbon dioxide occurs extraction phenomenon after contacting with crude oil, after being extracted by the light components in crude oil, allows heavily
Matter component is deposited on plugging hole in reservoir and shouts, and causes Reservoir Seepage ability to reduce, can affect the development effectiveness in later stage.
In sum, for intrinsic fracture aplasia, volume fracturing is difficult to be formed the reservoir of complex fracture, how to improve product
Amount, the recovery ratio that improves, reduction development cost is the bottleneck difficult problem that this area is urgently to be resolved hurrily simultaneously.
Summary of the invention
In order to solve obsolete hypotonic, compact reservoir fracturing reform recovery ratio is low, cost the is high difficulty of current intrinsic fracture
Topic, it is an object of the invention to provide a kind of oil field compression fracture remodeling method, it is possible to by energy storage between fracturing reform and fracturing fracture
Displacing phase combines, and distance displacement between traditional well is changed into short distance displacement between seam, thus realize with well pressure break-water filling-
The integration of displacement-oil recovery, synchronization.
The purpose of the present invention is achieved by the following technical programs:
A kind of oil field compression fracture remodeling method, it comprises the following steps:
Step one, wettability characteristics according to reservoir, select and have raising rock core substrate effective permeability and have simultaneously
Standby washing oil, the displacement of reservoir oil activated water of wettability modification function；
Step 2, according to the physical property of reservoir and mobility feature, use the displacement of reservoir oil activated water in step one, utilize numerical reservoir
Simulation softward CMG and/or Eclipse calculates the fracture interval that can set up effective displacement pressure system；
Step 3, according to the rock mechanics parameters of reservoir and parameters and earth stress, use the displacement of reservoir oil activated water in step one, profit
The minimum crack spacing avoiding stress to disturb is calculated by fracturing optimizing Design Software StimPlan；
Step 4, by step 2 calculate the fracture interval that can set up effective displacement pressure system and step 3 fall into a trap
The minimum crack spacing avoiding stress to disturb calculated combines optimization and obtains optimum fracture interval；
Horizontal well first paragraph is changed by step 5, employing single hop segmentation cutting transform pattern with the conventional pressure break of proppant
Make, form the crack with high flow conductivity；
Displacement of reservoir oil activated water in step 6, employing step one, according to step 2, step 3 and step 4 computational methods, meter
Calculate the optimum fracture interval of horizontal well second segment；Then the single hop segmentation cutting transform pattern identical with first paragraph transformation is used
Horizontal well second segment is not added with the extensive displacement of reservoir oil activated water fracturing reform of proppant, seam in pressure and minimizing is greatly improved
The row of returning of fluid in seam；Then the displacement of reservoir oil activated water in step one is used, according to step 2, step 3 and the calculating side of step 4
Method, calculates the optimum fracture interval of horizontal well follow-up well section；To follow-up well section according to proppant conventional fracturing reform and
It is not added with extensive two kinds of techniques of displacement of reservoir oil activated water fracturing reform of proppant the most alternately, until pressure break terminates, and guarantees
Final transformation section is the conventional fracturing reform with proppant；
Step 7, pressure break carry out closing well process after terminating, and after fracturing fracture closes, control oil nozzle and carry out open flow production.
In above-mentioned oil field compression fracture remodeling method, it is preferable that described proppant can be ceramsite propping agent.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the granularity of described ceramsite propping agent can be 20-70 mesh.
In above-mentioned oil field compression fracture remodeling method, it is preferable that in step 4, in conjunction with the method optimized it is: when being calculated
The fracture interval that can set up effective displacement pressure system less than when avoiding minimum crack spacing that stress disturbs, building
The fracture interval of vertical effective displacement pressure system is as optimum fracture interval；Effective displacement pressure can be set up when calculated
The fracture interval of system is more than when avoiding minimum crack spacing that stress disturb, with the minimum crack spacing work avoiding stress to disturb
For optimum fracture interval.
In above-mentioned oil field compression fracture remodeling method, in step one, reservoir wettability mainly includes that water is wet, mix moistening and oil
Wet, if reservoir is that water is wet, main by adding surfactant reduction oil water interfacial tension in reservoir, reduction flow resistance,
Being beneficial to note the foundation adopting pressure system, preferred displacement of reservoir oil activated water is alkyl sulfonic acid salt form surfactant, if reservoir is mixed
Close moistening or oil is wet, then need to add the surfactant that can change rock wettability, it is achieved wettability reversal, improve imbibition and put
Changing efficiency, preferred displacement of reservoir oil activated water is Radix Betae 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 described displacement of reservoir oil activated water can be surfactant and/or nanometer
The solution of granule.
In above-mentioned oil field compression fracture remodeling method, surfactant can be conventional surfactant, it is preferable that described 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 described nano-particle can include that carbon nano-particle and/or silicon are received
Rice grain, described nano particle diameter can be 5-80nm.
In above-mentioned oil field compression fracture remodeling method, it is preferable that the time that described closing well processes is with the conventional pressure break with proppant
The proppant of transformation section does not reflux as standard.
In above-mentioned oil field compression fracture remodeling method, it is preferable that described in can include frozen glue with the conventional fracturing reform of proppant
Sand fracturing transformation, displacement of reservoir oil activated water combine 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 described single hop segmentation cutting transform pattern uses
For the completion tool of well cementing casing pipe sliding sleeve class, can include pressure balance sliding sleeve combine band underseal coiled tubing completion tool or
Based Intelligent Control pitching sliding sleeve completion tool.
In above-mentioned oil field compression fracture remodeling method, the completion tool used is completion tool commonly used in the art.
In above-mentioned oil field compression fracture remodeling method, described single hop segmentation cutting transform pattern is in the multistage transformation of horizontal well every grade
Only transform the transform pattern of a crack.
In above-mentioned oil field compression fracture remodeling method, it is preferable that be not added with the extensive displacement of reservoir oil activity hydraulic pressure of proppant described in carrying out
When splitting transformation, the requirement that seam interior pressure is greatly improved is to stitch interior pressure to reach 1.1-1.3 times of original formation pressure.
In above-mentioned oil field compression fracture remodeling method, it is preferable that be not added with the extensive displacement of reservoir oil activity hydraulic pressure of proppant described in carrying out
When splitting transformation, the instrument of the row of returning reducing the interior fluid of seam uses switchable sliding sleeve instrument, after fracturing reform terminates, by switchable
Sliding sleeve is closed, or transformation section is injected diverting agent closure crack；Preferably, described diverting agent is that oil-soluble resin class is blocked up temporarily
Agent.
In above-mentioned oil field compression fracture remodeling method, it is preferable that be not added with the extensive displacement of reservoir oil activity hydraulic pressure of proppant described in carrying out
When splitting transformation, in the case of cannot using switchable sliding sleeve instrument or diverting agent closure, reduce the side of the row of returning of the interior fluid of seam
Method processes the time for increasing closing well in step 7, it is ensured that extensive displacement of reservoir oil activated water injects the crack closure in stage.
In above-mentioned oil field compression fracture remodeling method, when carrying out fracturing reform, it is desirable to horizontal well first paragraph and final stage change
Make and all carry out transforming with the fracturing of proppant, in order to give full play to the effect of displacement between crack.
In above-mentioned oil field compression fracture remodeling method, optimum fracture interval is seepage field interference and the stress field considering 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 distance displacement be changed into short distance displacement between seam, it is achieved with well pressure break-water filling-integration of displacement-oil recovery, synchronization
Change.Hypotonic, compact reservoir fracturing reform effect and recovery ratio can be improved.
The oil field compression fracture remodeling method that the present invention provides has the advantage that
(1) between using segmentation cutting fracturing reform to stitch with fracturing fracture, displacing phase is combined, and distance between traditional well is driven
Short distance displacement (＜ 40m) between the seam of the same well and layer, the beneficially foundation of displacement pressure system it is changed into for (＞ 100m), it is possible to
Recovery ratio is greatly improved；
(2) use the conventional fracturing reform with proppant and be not added with the extensive displacement of reservoir oil activated water fracturing reform phase of proppant
In conjunction with remodeling method, considerably reduce the consumption of proppant；Use a large amount of displacement of reservoir oil activated water to replace gelled fracturing fluid, use
Set up displacement pressure system between stitching with well and replace flooding pattern, development cost all can be greatly reduced, have matter for hypotonic, compact reservoir
The exploitation of amount, effective percentage provides a kind of important method.
Accompanying drawing explanation
Fig. 1 is to optimize displacement of reservoir oil activated 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 is to be capable of the certain distance of displacement between seam in embodiment to optimize schematic diagram；
Fig. 4 is (left figure fracture interval 30m, the right side of stress interference optimization fracture interval schematic diagram in horizontal well crack in embodiment
Figure fracture interval 40m)；
Fig. 5 is that in embodiment, displacement schematic diagram between fracturing fracture seam is cut in horizontal well segmentation.
Detailed description of the invention
In order to the technical characteristic of the present invention, purpose and beneficial effect are more clearly understood from, the existing skill to the present invention
Art scheme carries out described further below, but it is not intended that to the present invention can the restriction of practical range.Institute in following embodiment
The experiment reagent used and experimental technique if no special instructions, are this area conventional reagent and conventional method.
Embodiment
Present embodiments providing a kind of oil field compression fracture remodeling method, with certain well, (this well reservoir is that intrinsic fracture is obsolete
Hypotonic, compact reservoir) as a example by stitch between displacement fracturing reform, it comprises the following steps:
Step one, by core wettability test being shown the reservoir of this well, for mixing wetting characteristics, passes through experiment test
Preferably can effectively reduce interfacial tension and reduce fluid neuron network resistance, can realize again the betaine type amphoteric table of wettability modification
Face activating agent, simultaneously in order to improve oil displacement efficiency addition inorganic salt NaCl (addition suitably adjusts) according to practical situation, as
Displacement of reservoir oil activated water.As it is shown in figure 1, after adding displacement of reservoir oil activated water, fluid displacement distance is significantly increased.
Fig. 2 gives the displacement efficiency of dissimilar surfactant and nano-particle, wherein cation surface activating
Agent be quaternary ammonium surfactant, anion surfactant be alkyl sulfonic acid salt surfactant, amphoteric surfactant
For Radix Betae alkaline surfactant, nanometer microemulsion be silicon nano material or carbon nanomaterial, salt be KCl or NaCl.
Step 2, this well are fine and close oil-gas reservoir, and the permeability of reservoir is 0.2mD and mobility is 0.1mD/mPa s, start
Barometric gradient 0.1MPa/m, uses the displacement of reservoir oil activated water in step one, utilizes CMG reservoir numerical simulation computed in software to go out and effectively drive
Fracture interval for pressure system；As it is shown on figure 3, effective displacement pressure system can be set up for permeability 0.2mD reservoir
Fracture interval is 30m.
Step 3, 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 that fluid injection scale step one optimizes
Water 1200m3, gelled fracturing fluid 600m3, add sand 50m3, operational discharge capacity 6m3/ min, utilizes fracturing optimizing Design Software
StimPlan calculates the minimum crack spacing avoiding stress to disturb；In the present embodiment, calculating avoid the minimum that stress disturbs
Fracture interval is 35m.
Step 4, as shown in Figure 4, it is contemplated that the fracture interval setting up effective displacement pressure system is 30m, less than avoid should
The minimum crack spacing 35m of power interference, therefore, the fracture interval that combining step two and step 3 obtain, optimization obtains optimum and splits
Kerf spacing is 30m, simultaneously displacement of reservoir oil activated water stage fracturing fluid scale 1100m3, operational discharge capacity 5m3/min。
Step 5, employing single hop segmentation cutting transform pattern, the completion tool used is that pressure balance sliding sleeve combines band
The coiled tubing completion tool of underseal, adds the normal of ceramic proppant (size specification is 20-40 mesh) to horizontal well first paragraph
Rule fracturing reform (construction parameter: the displacement of reservoir oil activated water 1100m in step one3, gelled fracturing fluid 600m3, add sand 50m3, construction row
Amount 5-6m3/ min), form the crack with high flow conductivity, in the present embodiment, fracture condudtiviy reaches 30D cm.
Displacement of reservoir oil activated water in step 6, employing step one, according to step 2, step 3 and step 4 computational methods, meter
Calculating horizontal well second segment optimum fracture interval, in the present embodiment, the optimum fracture interval of calculating is 30m；Then single hop is used
Segmentation cutting transform pattern is not added with the extensive displacement of reservoir oil activated water fracturing reform of proppant to horizontal well second segment, and single hop drives
Oil activated water reservoir quantity is 1100m3, in seam is greatly improved, pressure reaches 1.16 times of original formation pressure, and pressure to stitching interior pressure
The displacement of reservoir oil activated water not row of returning or the row of returning less in seam is required 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 activated water fracturing reform of proppant and sequentially hand over
For carrying out, until pressure break terminates, and guarantee that finally the section of transformation is the conventional fracturing reform with proppant, in order to give full play between seam
The effect of displacement.
Step 7, pressure break carry out the closing well of a period of time and process after terminating, use switchable sliding sleeve to carry out displacement of reservoir oil activated water
Transformation section closure well, injects oil-soluble resin class diverting agent, and its closed-in time is main according to adding ceramic proppant fracturing reform section
Ceramic proppant does not reflux as standard, treats that gelled fracturing fluid starts the row of returning after breaking gel, and the time that sets, as 4h, requires producing simultaneously
Stage oil nozzle controls at about 2mm, uses pressurize to produce, it is to avoid the stress sensitive on stratum is injured and causes by big producing pressure differential
In-place oil degassing affects later stage production, and production process is as shown in Figure 5.Fig. 5 is to drive between horizontal well segmentation cutting fracturing fracture seam
For schematic diagram, wherein, in figure, black is ceramic proppant fracturing fracture, and white is displacement of reservoir oil activated water fracturing fracture.
A kind of hypotonic, the compact reservoir using this embodiment to provide closely cuts displacement between pressure-break and improves the skill of recovery ratio
Art method, after ensureing pressure in the case of initil output myopia, owing to the foundation of displacement frac system can improve recovery ratio
6%-8%, simultaneously because being greatly reduced of proppant and fracturing fluid gel consumption so that fracturing reform cost is greatly reduced, for
Reserves hypotonic, fine and close have quality, profitable exploitation to provide a kind of important method.
In sum, the oil field compression fracture remodeling method that the present invention provides, use segmentation cutting fracturing reform and fracturing fracture
Between seam, displacing phase combines, and distance displacement between traditional well is changed into short distance displacement between the seam of the same well and layer, is conducive to driving
Foundation for pressure system, it is possible to recovery ratio is greatly improved；Simultaneously because being greatly reduced of proppant and fracturing fluid gel consumption,
Fracturing reform cost is greatly reduced, has quality, profitable exploitation to provide a kind of important method for reserves hypotonic, fine and close.
Claims (10)
1. an oil field compression fracture remodeling method, it comprises the following steps:
Step one, wettability characteristics according to reservoir, select and have raising rock core substrate effective permeability and be provided simultaneously with washing
Oil, the displacement of reservoir oil activated water of wettability modification function；
Step 2, according to the physical property of reservoir and mobility feature, use the displacement of reservoir oil activated water in step one, utilize reservoir numerical simulation
Software CMG and/or Eclipse calculates the fracture interval that can set up effective displacement pressure system；
Step 3, according to the rock mechanics parameters of reservoir and parameters and earth stress, use the displacement of reservoir oil activated water in step one, utilize water
Defeat and split optimizing Design Software StimPlan and calculate the minimum crack spacing avoiding stress to disturb；
Step 4, by step 2 calculate the fracture interval that can set up effective displacement pressure system and step 3 in calculate
The minimum crack spacing avoiding stress to disturb combines optimization and obtains optimum fracture interval；
Step 5, use single hop segmentation cutting transform pattern to horizontal well first paragraph with the conventional fracturing reform of proppant,
Form the crack with high flow conductivity；
Displacement of reservoir oil activated water in step 6, employing step one, according to step 2, step 3 and step 4 computational methods, calculates
The optimum fracture interval of horizontal well second segment；Then use the single hop segmentation cutting transform pattern identical with first paragraph transformation to water
Horizontal well second segment carries out being not added with the extensive displacement of reservoir oil activated water fracturing reform of proppant, seam interior pressure is greatly improved and reduces in seam
The row of returning of fluid；Then the displacement of reservoir oil activated water in step one is used, according to step 2, step 3 and the computational methods of step 4,
Calculate the optimum fracture interval of horizontal well follow-up well section；To follow-up well section according to the conventional fracturing reform of proppant be not added with
Extensive two kinds of techniques of displacement of reservoir oil activated water fracturing reform of proppant the most alternately, until pressure break terminates, and guarantee final
Transformation section is the conventional fracturing reform with proppant；
Step 7, pressure break carry out closing well process after terminating, and after fracturing fracture closes, control oil nozzle and carry out open flow production.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: described proppant is ceramsite propping agent；
Preferably, the granularity of described ceramsite propping agent is 20-70 mesh.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that in step 4, in conjunction with the side optimized
Method is: when the calculated fracture interval of effective displacement pressure system of can setting up is less than the minimum crack avoiding stress to disturb
During spacing, so that the fracture interval of effective displacement pressure system can be set up as optimum fracture interval；When calculated can
When setting up the fracture interval of effective displacement pressure system more than the minimum crack spacing avoiding stress to disturb, to avoid stress to disturb
Minimum crack spacing as optimum fracture interval.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: described displacement of reservoir oil activated water is surface activity
Agent and/or the solution of nano-particle；
Preferably, described surfactant includes betaine type amphoteric surfactant and/or alkyl sulfonic acid salt form surfactant；Excellent
Selection of land, described nano-particle includes that carbon nano-particle and/or nano silicon particles, described nano particle diameter are 5-80nm.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: the time that described closing well processes props up to add
The proppant of the conventional fracturing reform section of support agent does not reflux as standard.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that described in:, the conventional pressure break with proppant changes
Make and include that frozen glue sand fracturing transformation, displacement of reservoir oil activated water combine frozen glue sand fracturing transformation or linear cementing conjunction frozen glue sand fracturing
Transformation.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: described single hop segmentation cutting transform pattern
The completion tool that completion tool is well cementing casing pipe sliding sleeve class used, combines the coiled tubing of band underseal including pressure balance sliding sleeve
Completion tool or Based Intelligent Control pitching sliding sleeve completion tool.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: it is not added with the big rule of proppant described in carrying out
During mould displacement of reservoir oil activated water fracturing reform, the requirement that seam interior pressure is greatly improved is the 1.1-that the interior pressure of seam reaches original formation pressure
1.3 again.
Oil field compression fracture remodeling method the most according to claim 1, it is characterised in that: it is not added with the big rule of proppant described in carrying out
During mould displacement of reservoir oil activated water fracturing reform, the instrument of the row of returning reducing the interior fluid of seam uses switchable sliding sleeve instrument；At fracturing reform
After end, switchable sliding sleeve is closed, or transformation section is injected diverting agent closure crack；Preferably, described diverting agent is oil
Soluble resin class diverting agent.
Oil field compression fracture remodeling method the most according to claim 9, it is characterised in that: it is not added with the big of proppant described in carrying out
During scale displacement of reservoir oil activated water fracturing reform, in the case of cannot using switchable sliding sleeve instrument or diverting agent closure, reduce seam
The method of the row of returning of interior fluid is to increase the time that in step 7, closing well processes, it is ensured that extensive displacement of reservoir oil activated water injects the stage
Crack closure.
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