CN106321051A - Method for optimizing multi-section fractured horizontal well network crack parameter - Google Patents
Method for optimizing multi-section fractured horizontal well network crack parameter Download PDFInfo
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Abstract
The invention discloses a method for optimizing the multi-section fractured horizontal well network crack parameter. The method comprises the steps that a reservoir characteristic parameter of a target block is obtained; based on the reservoir characteristic parameter, a model of network cracks, including main cracks and secondary cracks, of a multi-section fractured horizontal well of the target block is established; the network crack parameter of the network crack model is designed; and based on the orthogonal test method, the network crack parameter is optimized and determined. According to the method, the optimal network crack parameter setting of the multi-section fractured horizontal well including the main cracks and the secondary cracks can be obtained at a time, and an optimized result can effectively guide fracturing operation, greatly increase the modification volume, and remarkably improve the construction effect.
Description
Technical field
The present invention relates to technical field of petroleum extraction, specifically, relate to a kind of for optimizing multistage pressure break level
The method of well pattern network fracture parameters.
Background technology
Along with large-scale developing and utilizing of fine and close oil-gas reservoir and shale oil gas reservoir, volume fracturing technology is progressively pushed away
Wide application.Fine and close oil-gas reservoir and shale oil gas reservoir belong to unconventional gas resource, have reservoir lithology complicated,
The haircut of substrate poor permeability, laminated structure of shale layer such as educates at the feature, general without natural production capacity, the network fracture of formation after pressure break
System is the seepage channel that it is main.The purpose of volume fracturing i.e. formed longitudinally upper fracture height run through whole effectively
Reservoir thickness, the most a plurality of main seam and a crisscross fracture network system being interconnected of seam.Research shows,
Permeability is the least, then in network fracture, a seam system is the biggest to the contribution of yield, when permeability≤1 × 10-4MD,
Fracture network reaches about 80% to the contribution of the production capacity limit.
Owing to network fracture comprises multiple cracking system, as long in bar number, the seam of main seam, flow conductivity and the bar of a seam
Number, seam long with flow conductivity etc. parameter, be designed with very with traditional split waveguide carried out only for main seam
Big difference, the optimization design how it being carried out science, annoying numerous scientific workers always.Current is excellent
Change method has been used up the optimum ideals in conventional single crack, by arranging the length of artificial major fracture in reservoir
And the variation tendency of yield after flow conductivity, simulation pressure respectively, obtain according to the flex point of trend curve and most preferably stitch length
And optimal flow conductivity.Compared with on-site actual situations, there is many limitation in the method: do not account for splitting more
Seam system；Simple hypothesis support seam from pit shaft to fracture tip is high constant；Fracture condudtiviy is a steady state value；
Ignore Proppant Slugs formula conventional in network fracture pressure break and add the impact of sand isotype.Therefore, application routine side
After method simulation shale gas well pressure, Yield changes does not has any directive significance.
Therefore, needing a kind of new network fracture parameter optimization method of proposition badly, design result can be follow-up pressure break
After construction parameter design and final pressure, yield and assessment of economic benefit provide solid foundation.
Summary of the invention
For solving problem above, the invention provides a kind of for optimizing multistage frac water horizontal well network fracture parameter
Method.
According to one embodiment of present invention, it is provided that one is used for optimizing multistage frac water horizontal well network fracture ginseng
The method of number, including:
Obtain the reservoir characteristic parameter of target block；
Set up target block based on described reservoir characteristic parameter and include main seam and the multistage frac water horizontal well of a seam
Network fracture model；
Design the network fracture parameter of described network fracture model；
Based on orthogonal design method optimization and determine described network fracture parameter.
According to one embodiment of present invention, described network fracture parameter includes main seam parameter, a seam parameter and props up
Cracking seam height coefficient, wherein, described main seam parameter includes between main seam seam length, main seam flow conductivity, main seam seam
Away from main seam exhaustion run, described seam parameter includes that seam seam is long, a seam flow conductivity, a seam kerf spacing and
Prop up seam exhaustion run.
According to one embodiment of present invention, based on described in described main seam parameter designing seam parameter.
According to one embodiment of present invention, farther include based on described in described main seam parameter designing seam parameter
Based on the step that described main described seam seam of the long design of seam seam is long, this step includes:
The experience flaw size obtained based on pressure break, arranges n level main seam seam long；
Based on the main seam induced stress sphere of action upper limit, n level is set and props up seam seam length.
According to one embodiment of present invention, farther include based on described in described main seam parameter designing seam parameter
Step based on described seam flow conductivity of described main seam flow conductivity design, this step includes:
Sand is added based on proppant short-term flow conductivity test result, actual pressing crack construction average sand liquor ratio and slug formula
Infusion program, designs n level main seam initial stage of construction diversion ability；
Determine that the main seam of n level loses based on proppant long-term flow conductivity test result and on-the-spot fractured well exhaustion run
The effect cycle, and then determine n level main seam long-term flow conductivity；
The n of correspondence is determined based on described n level main seam initial stage of construction diversion ability and described n level main seam exhaustion run
Level props up seam initial stage of construction diversion ability and n level props up seam long-term flow conductivity.
According to one embodiment of present invention, farther include based on described in described main seam parameter designing seam parameter
Step based on described seam kerf spacing of described main seam kerf spacing design, this step includes:
Based on main seam induced stress and described seam seam long design n level main seam kerf spacing；
N level is set based on described main seam kerf spacing and intrinsic fracture random distribution and props up seam kerf spacing.
According to one embodiment of present invention, arrange described supporting crack height coefficient to farther include:
The middle part of the Effective Reservoirs thickness of fracture tip is set to reference point 0, and the reservoir at pit shaft has respectively
Position at the bottom of the top of effect thickness connects straight line, and position at the bottom of top is set to reference point 1, to form triangle crack
Altitude profile；
Seam end up and down two centered by described reference point 0 are set up based on described reference point 0 and described reference point 1
The trapezoidal fracture support altitude profile pushing up 2 lines in the end of reservoir effective thickness at point and pit shaft, and described
N horizontal support fracture height is set between described reference point 0 and described reference point 1 on fracture support altitude profile
Coefficient.
According to one embodiment of present invention, when using described slug formula to add sand pump note program, flow conductivity sets
Putting employing stagewise to lay, wherein, the described main seam initial stage of construction diversion ability without proppant support section presses nothing
Limit is arranged greatly, and described main seam exhaustion run to extend.
According to one embodiment of present invention, determine that described n level main seam long-term flow conductivity farther includes:
The exhaustion run combining on-the-spot fractured well according to proppant long-term flow conductivity test result determines water conservancy diversion energy
Power lapse rate in time, exists according to corresponding lapse rate from the described initial flow conductivity of n level with flow conductivity
Just it is decremented to 0 the latter stage of described n level main seam exhaustion run to determine the main seam of described n level long-term water conservancy diversion energy
Power.
According to one embodiment of present invention, based on orthogonal design method optimization and determine described network fracture parameter
Farther include:
Based between described n level main seam seam length, described n level main seam flow conductivity, described n level main seam seam
Away from, described n level main seam exhaustion run, described n level prop up that seam seam is long, described n level props up seam flow conductivity,
Described n level props up seam exhaustion run and described n horizontal support fracture height coefficient sets up orthogonal scheme design table；
The network that fractured well Production development prediction is optimum to determine yield is carried out based on described orthogonal scheme design table
Fracture parameters.
Beneficial effects of the present invention:
The present invention can disposably obtain the optimal network crack ginseng of the multistage frac water horizontal well including main seam and a seam
Number arrange, optimum results can effectively instruct pressing crack construction, be significantly greatly increased transformation volume, be obviously improved construction effect,
Thus obtain the economic benefit of maximum.
Other features and advantages of the present invention will illustrate in the following description, and, partly from description
In become apparent, or by implement the present invention and understand.The purpose of the present invention and other advantages can be passed through
Structure specifically noted in description, claims and accompanying drawing realizes and obtains.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing required in description of the prior art does and simply introduces:
Fig. 1 is method flow diagram according to an embodiment of the invention；
Fig. 2 is that slug formula according to an embodiment of the invention adds sand network fracture schematic diagram；
Fig. 3 is fracture support altitude profile schematic diagram according to an embodiment of the invention；And
Fig. 4 is well hydraulic fracture operating curve figure according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the present invention are described in detail, whereby to the present invention how below with reference to drawings and Examples
Application technology means solve technical problem, and the process that realizes reaching technique effect can fully understand and real according to this
Execute.As long as it should be noted that do not constitute conflict, in each embodiment in the present invention and each embodiment
Each feature can be combined with each other, and the technical scheme formed is all within protection scope of the present invention.
It is illustrated in figure 1 method flow diagram according to an embodiment of the invention, comes this below with reference to Fig. 1
Invention is described in detail.
First, in step s 110, the reservoir physical parameter of target block is obtained.In this step, comprehensively
The data such as all of well logging of target block, core test and production test obtains and includes matrix permeability, natural splits
Parameter attribute and the distribution characteristicss in reservoir thereof such as seam, effective thickness and geology dessert.
It follows that in the step s 120, set up target block based on reservoir characteristic parameter and include main seam and a seam
Network fracture model.The network fracture model set up in this step includes main seam system and a seam system.Right
The method of integration is all taked in simulation in main seam system and a seam system.Concrete setting takes equivalent conductivity
Method, the high permeable strip being equivalent in reservoir in crack, after seam length is set to desired value, stitches fracture support
Wide amplification more than at least 10 times, correspondingly, the permeability in crack is scaled, makes their product i.e.
The flow conductivity in crack keeps constant.
Above-mentioned is in order to the iteration needed for reducing the singularity of calculating and simulation is asked by the purpose that fracture width amplifies
The solution time.Such as, during concrete operations, can based on experience survey data, arrange a width of 0.01m of foundation slot, 0.05m,
0.1m, 0.2m, 0.5m and 1m, the yield with simulation is basicly stable for according to determining the suitably wide times magnification of seam
Number, if the multiple that the yield shakiness rule explanation that seam width calculates after amplifying is amplified is improper.
It follows that in step s 130, the network fracture parameter of planned network fractured model.Wherein, network
Fracture parameters includes main seam parameter, seam parameter and supporting crack height coefficient.Main seam parameter include main seam seam long,
Main seam flow conductivity, main seam kerf spacing and main seam exhaustion run, a seam parameter includes that a seam stitches long, a seam water conservancy diversion
Ability, a seam kerf spacing and a seam exhaustion run.Wherein, a seam parameter is arranged based on main seam parameter, concrete
Setting includes the following aspects.
Long based on main seam seam long design seam seam.During design, the experience flaw size obtained based on current pressure break,
It is long that n level main seam seam is set in the experience size range that main seam seam is long.N level therein represents n difference
The main seam seam long value of value, n is positive integer.Such as, 4 levels main seam seam long may be configured as 50m, 150m, 250m,
350m.Main seam herein stitches length and props up the partly length stitching a length of crack.
Based on the main seam induced stress sphere of action upper limit, it is correspondingly arranged n level and props up seam seam length.Such as, major fracture
The sphere of action upper limit of induced stress is 35m, is difficult to formation and turns to seam (being equal to a seam), now after exceeding
As crack still extends, also will revert to the orientation of major fracture, therefore corresponding 4 levels main seam seam is long, 4 levels prop up seam
Seam length can be correspondingly arranged as 5m, 15m, 25m, 35m.
Based on main seam flow conductivity design seam flow conductivity.Main seam flow conductivity and a seam flow conductivity all include
Short-term and long-term flow conductivity two kinds.During n level main seam initial stage of construction diversion capabilities setting, short according to indoor proppant
Phase flow conductivity test result, adds sand pump note program in conjunction with the average sand liquor ratio of actual pressing crack construction and slug formula,
Choosing comprehensively determines.When n level main seam long-term flow conductivity is arranged, test according to proppant long-term flow conductivity
As a result, the exhaustion run in conjunction with on-the-spot major part fractured well determines, is entered by flow conductivity lapse rate in time
Row characterizes.
Such as, main seam pressure break exhaustion run was 3 years, then flow conductivity from initial value according to successively decreasing accordingly
Rate, was just decremented to 03 year latter stage.During concrete operations, 4 level main seam initial stage of construction diversion ability can set respectively
It is set to 20 μm2·cm、30μm2·cm、40μm2·cm、50μm2Cm 4 value；Water conservancy diversion degradation factor presses pressure break
Exhaustion run is respectively 2 years, 3 years, 4 years, 4 values settings in 5 years.
N level props up the setting of seam flow conductivity, due to a seam seam is wide and enter to stitch sand liquor ratio main seam flow conductivity will
Reduce more than 5-10 times, enter even without proppant.Parameter with reference to main seam is arranged, a seam initial stage of construction diversion energy
Power value is main seam initial stage of construction diversion ability 1/m, and m is positive integer.Such as, when m value is 10, a seam initial stage
Flow conductivity value is the 1/10 of main seam initial stage of construction diversion ability.Meanwhile, the inefficacy of a seam can faster, such as, and 4
Level is propped up seam exhaustion run and be may be configured as 0.5 year, 1 year, 1.5 years, 4 values such as 2 years, water conservancy diversion decline exponent
Recalculate by this exhaustion run.
When the flow conductivity using slug formula to add sand model is arranged, stagewise to be taked is laid.In other words,
Proppant support section is had to carry out as stated above, without the main seam incipient crack flow conductivity of proppant support section
Arrange by infinity.The convergence calculated in view of simulation, such as, main seam incipient crack flow conductivity can base
500 μm tentatively it are set in empirical data2·cm.Pressure break exhaustion run to extend, can be taken as respectively 4 years, 6
Year, 8 years, 10 years 4 values.If Fig. 2 is that slug formula adds sand network fracture schematic diagram, wherein different gray scale generations
Table difference fracture condudtiviy, needs segmentation to be handled differently.
Based on main seam kerf spacing design seam kerf spacing.During design, set based on main seam induced stress and a seam seam length
Meter n level main seam kerf spacing, the random distribution nature being then based on main seam kerf spacing and intrinsic fracture arranges n water
Flat seam kerf spacing.
Concrete, it is contemplated that main seam induced stress and a mentality of designing that seam seam is long, the most main seam kerf spacing
Arrange, it is contemplated that take aforementioned n long value of seam seam.When n takes 4, a more than main seam kerf spacing correspondence seam
4 values that seam is long, i.e. 5m, 15m, 25m, 35m.The determination propping up seam kerf spacing is more complicated, because it is main
The parameters such as the distribution density of intrinsic fracture to be depended on, and intrinsic fracture to be random distribution in the majority, the most main seam
Net pressure is also difficult to reach the critical pressure that intrinsic fracture opens.Therefore, the value of intrinsic fracture spacing presses 4
Main seam length value is distributed the random function being multiplied by between value [0,1].
Arrange supporting crack height coefficient to include the middle part of the Effective Reservoirs thickness of fracture tip is set to reference
Point 0, position at the bottom of the top of the reservoir effective thickness at pit shaft connects straight line respectively, and is set to position at the bottom of top
Reference point 1, to form triangle fracture height section.
Based on reference point 0 and reference point 1 set up seam end centered by reference point 0 up and down 2 store up at pit shaft
The trapezoidal fracture support altitude profile of top 2 lines in the end of layer effective thickness, and at fracture support altitude profile
N horizontal support fracture height coefficient is set between upper reference point 0 and reference point 1.
Concrete, it is contemplated that the settling character of proppant, the bearing height of general only well bore fractures can equivalence
For reservoir effective thickness, and on remote well crack, supporting crack height can gradually successively decrease, to fracture tip position
Support is highly minimum.With the middle part of the Effective Reservoirs thickness of fracture tip as reference point, extreme situation is at seam end,
The height in crack is 0, for simplicity, it will be assumed that supporting crack altitude profile now is from 0 above-mentioned point
Position, position at the bottom of the top of the reservoir effective thickness at pit shaft connects straight line respectively, and this triangle is splitting of support
Seam altitude profile.By that analogy, when the fracture height of seam end is the 0.1 of reservoir effective thickness, 0.5,1 times,
Be seam end centered by 0 o'clock up and down 2 with pit shaft at reservoir effective thickness push up 2 lines in the end ladder
Shape distribution is fracture support altitude profile, the as shown in Figure 3 middle shallower part of gray scale.High in above-mentioned fracture support
Reservoir outside degree section does not has supporting crack, and flow conductivity is 0 always.Including 0 seam height of seam end, also take 4
Individual value, can get 4 horizontal support fracture height coefficients by above method: 0,0.1,0.5,1.
Finally, in step S140, based on orthogonal design method optimization and determine network fracture parameter.Comprehensively
The main seam parameter that more than designs, seam parameter and supporting crack height coefficient, use orthogonal design method, can one
The result that secondary property synchronism output optimizes.Concrete, selection all of the above or subnetwork fracture parameters, and respectively
The number of levels of network fracture parameter, sets up orthogonal scheme design table.It is one as shown in table 1 and uses above main seam
Seam length, main seam flow conductivity, main seam kerf spacing, main seam exhaustion run, a seam seam be long, stitch flow conductivity,
Seam exhaustion run and 8 factors of fracture height coefficient, each factor take the orthogonal scheme design table of 4 levels.
Certainly, 8 parameters during network fracture parameter is not limited to table 1, the number of levels of each factor are also not necessarily limited to 4 levels.
Table 1 network fracture parameter optimization orthogonal scheme design table
Carry out fractured well Production development prediction based on this orthogonal scheme design table, determine the network fracture that yield is optimum
Parameter area, to instruct pressing crack construction further.
Below by way of a specific embodiment, the experiment effect of the present invention is illustrated.The present invention is a certain
Horizontal well volume fracturing rebuilding construction is applied, this well vertical depth 2146m, depth measurement 3646m, horizontal segment length
1008m.Using method provided by the present invention, it is as follows that optimization obtains optimal network fracture parameters: main seam half is long
250～300m, flow conductivity steady in a long-term 1～3 μm2Cm, bunch spacing 20～25m, a seam half length 10～15m,
Flow conductivity 0.1～0.5 μm steady in a long-term2Cm, and long-term flow conductivity keeps stable, with this understanding as far as possible
This well long term stable production 6～7 × 10 anticipated4m3/ d, within 19 months, tired gas production is 3420～3990 × 104m3.With this
For according to parameters such as Optimizing construction scale, bunch perforating modes, cloth slit die formulas, successfully solving page through field conduct
The technical barriers such as rock gas reservoir fracturing fracture complexity is the highest, transform finite volume, production decline is fast.Typical case
Construction curve is as shown in Figure 4.
Continued 1 network fracture parameter optimization orthogonal scheme design table
| 14 | 350 | 15 | 20 | 4 | 3 | 5 | 25 | 0 |
| 15 | 350 | 25 | 50 | 3 | 0 | 2 | 15 | 1 |
| 16 | 350 | 35 | 40 | 2 | 1 | 3 | 5 | 0.5 |
| 17 | 50 | 5 | 50 | 2 | 3 | 3 | 25 | 0.1 |
| 18 | 50 | 15 | 40 | 3 | 2 | 2 | 35 | 0 |
| 19 | 50 | 25 | 30 | 4 | 1 | 5 | 5 | 1 |
| 20 | 50 | 35 | 20 | 5 | 0 | 4 | 15 | 0.5 |
| 21 | 150 | 5 | 50 | 3 | 2 | 5 | 5 | 0.5 |
| 22 | 150 | 15 | 40 | 2 | 3 | 4 | 15 | 1 |
| 23 | 150 | 25 | 30 | 5 | 0 | 3 | 25 | 0 |
| 24 | 150 | 35 | 20 | 4 | 1 | 2 | 35 | 0.1 |
| 25 | 250 | 5 | 40 | 4 | 0 | 3 | 35 | 1 |
| 26 | 250 | 15 | 50 | 5 | 1 | 2 | 25 | 0.5 |
| 27 | 250 | 25 | 20 | 2 | 2 | 5 | 15 | 0.1 |
| 28 | 250 | 35 | 30 | 3 | 3 | 4 | 5 | 0 |
| 29 | 350 | 5 | 40 | 5 | 1 | 5 | 15 | 0 |
| 30 | 350 | 15 | 50 | 4 | 0 | 4 | 5 | 0.1 |
| 31 | 350 | 25 | 20 | 3 | 3 | 3 | 35 | 0.5 |
| 32 | 350 | 35 | 30 | 2 | 2 | 2 | 25 | 1 |
15 sections of 36 bunches of pressure breaks are completed altogether, the total liquid measure in accumulative injection stratum according to the construction curve of Fig. 4
21522m3, accumulative add sand 966m3, after pressure, open-flow capacity reaches 16.74 × 104m3/ d, by June, 2014
Stable yields 19 months continuously, tired gas production reaches 3690.2 × 104m3, achieve significant economic benefit.Thus
Understanding, the estimated output of the employing present invention of this well is consistent with actual production.
The present invention has evaded the technical risk of employing single results of fracture simulation shale gas well fracturing effect, and optimum results can
Effectively instruct pressing crack construction, be significantly greatly increased transformation volume, be obviously improved construction effect, thus obtain maximum warp
Ji benefit.
While it is disclosed that embodiment as above, but described content is only to facilitate understand the present invention
And the embodiment used, it is not limited to the present invention.Technology people in any the technical field of the invention
Member, on the premise of without departing from spirit and scope disclosed in this invention, can be in the formal and details implemented
On make any amendment and change, but the scope of patent protection of the present invention, still must be with appending claims institute
Define in the range of standard.
Claims (10)
1. for the method optimizing multistage frac water horizontal well network fracture parameter, including:
Obtain the reservoir characteristic parameter of target block；
Set up target block based on described reservoir characteristic parameter and include main seam and the multistage frac water horizontal well of a seam
Network fracture model；
Design the network fracture parameter of described network fracture model；
Based on orthogonal design method optimization and determine described network fracture parameter.
Method the most according to claim 1, it is characterised in that described network fracture parameter includes main seam
Parameter, seam parameter and supporting crack height coefficient, wherein, described main seam parameter includes main seam seam length, main seam
Flow conductivity, main seam kerf spacing and main seam exhaustion run, described seam parameter includes a seam seam length, a seam water conservancy diversion
Ability, a seam kerf spacing and a seam exhaustion run.
Method the most according to claim 2, it is characterised in that based on described in described main seam parameter designing
Prop up seam parameter.
Method the most according to claim 3, it is characterised in that based on described in described main seam parameter designing
Propping up seam parameter to farther include based on the long step designing described seam seam length of described main seam seam, this step includes:
The experience flaw size obtained based on pressure break, arranges n level main seam seam long；
Based on the main seam induced stress sphere of action upper limit, n level is set and props up seam seam length.
5. according to the method described in claim 3 or 4, it is characterised in that based on described main seam parameter designing
Described seam parameter farther includes step based on described seam flow conductivity of described main seam flow conductivity design,
This step includes:
Sand is added based on proppant short-term flow conductivity test result, actual pressing crack construction average sand liquor ratio and slug formula
Infusion program, designs n level main seam initial stage of construction diversion ability；
Determine that the main seam of n level loses based on proppant long-term flow conductivity test result and on-the-spot fractured well exhaustion run
The effect cycle, and then determine n level main seam long-term flow conductivity；
The n of correspondence is determined based on described n level main seam initial stage of construction diversion ability and described n level main seam exhaustion run
Level props up seam initial stage of construction diversion ability and n level props up seam long-term flow conductivity.
6. according to the method according to any one of claim 3-5, it is characterised in that based on described main seam parameter
Described seam parameter of design farther includes step based on described seam kerf spacing of described main seam kerf spacing design,
This step includes:
Based on main seam induced stress and described seam seam long design n level main seam kerf spacing；
N level is set based on described main seam kerf spacing and intrinsic fracture random distribution and props up seam kerf spacing.
7. according to the method according to any one of claim 3-6, it is characterised in that arrange described supporting crack
Height coefficient farther includes:
The middle part of the Effective Reservoirs thickness of fracture tip is set to reference point 0, and the reservoir at pit shaft has respectively
Position at the bottom of the top of effect thickness connects straight line, and position at the bottom of top is set to reference point 1, to form triangle crack
Altitude profile；
Seam end up and down two centered by described reference point 0 are set up based on described reference point 0 and described reference point 1
The trapezoidal fracture support altitude profile pushing up 2 lines in the end of reservoir effective thickness at point and pit shaft, and described
N horizontal support fracture height is set between described reference point 0 and described reference point 1 on fracture support altitude profile
Coefficient.
Method the most according to claim 5, it is characterised in that add sand pump note when using described slug formula
During program, flow conductivity arranges employing stagewise and lays, wherein, without the described master of proppant support section
Seam initial stage of construction diversion ability is arranged by infinity, and described main seam exhaustion run to extend.
Method the most according to claim 5, it is characterised in that determine that the described main seam of n level is led for a long time
Stream ability farther includes:
The exhaustion run combining on-the-spot fractured well according to proppant long-term flow conductivity test result determines water conservancy diversion energy
Power lapse rate in time, exists according to corresponding lapse rate from the described initial flow conductivity of n level with flow conductivity
Just it is decremented to 0 the latter stage of described n level main seam exhaustion run to determine the main seam of described n level long-term water conservancy diversion energy
Power.
Method the most according to claim 7, it is characterised in that based on orthogonal design method optimization the most really
Fixed described network fracture parameter farther includes:
Based between described n level main seam seam length, described n level main seam flow conductivity, described n level main seam seam
Away from, described n level main seam exhaustion run, described n level prop up that seam seam is long, described n level props up seam flow conductivity,
Described n level props up seam exhaustion run and described n horizontal support fracture height coefficient sets up orthogonal scheme design table；
The network that fractured well Production development prediction is optimum to determine yield is carried out based on described orthogonal scheme design table
Fracture parameters.
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| CN111814318B (en) * | 2020-06-22 | 2021-06-01 | 中国石油大学(华东) | Staged fracturing fracture parameter design method for tight reservoir horizontal well |
| CN112965114A (en) * | 2021-02-07 | 2021-06-15 | 中国石油大学(华东) | Method for evaluating desserts of offshore deep natural gas reservoir |
| CN112965114B (en) * | 2021-02-07 | 2023-04-07 | 中国石油大学(华东) | Dessert evaluation method for offshore deep natural gas reservoir |
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| CN114239308B (en) * | 2021-12-24 | 2022-08-12 | 西南石油大学 | Multi-scale high-density fracturing parameter optimization method |
| CN114676631A (en) * | 2022-03-25 | 2022-06-28 | 西南石油大学 | Shale gas reservoir fracturing horizontal well fracturing transformation parameter recommendation method |
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