CN109424349B - Method and device for acquiring fiber sand-carrying steering effect - Google Patents
Method and device for acquiring fiber sand-carrying steering effect Download PDFInfo
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- CN109424349B CN109424349B CN201710740278.6A CN201710740278A CN109424349B CN 109424349 B CN109424349 B CN 109424349B CN 201710740278 A CN201710740278 A CN 201710740278A CN 109424349 B CN109424349 B CN 109424349B
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- 239000000835 fiber Substances 0.000 title claims abstract description 78
- 230000000694 effects Effects 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 107
- 238000010276 construction Methods 0.000 claims abstract description 81
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 claims abstract description 14
- 230000005484 gravity Effects 0.000 claims abstract description 14
- 238000005213 imbibition Methods 0.000 claims description 37
- 239000011148 porous material Substances 0.000 claims description 24
- 239000004576 sand Substances 0.000 claims description 20
- 238000010586 diagram Methods 0.000 description 9
- 239000012530 fluid Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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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
- E21B43/267—Methods for stimulating production by forming crevices or fractures reinforcing fractures by propping
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Abstract
The invention provides a method and a device for acquiring a sand-carrying steering effect of fiber, wherein the method comprises the following steps: at a first moment, acquiring a first ground construction pressure before steering; at a second moment, acquiring the steered second ground construction pressure; acquiring the ratio of the number of unblocked liquid suction holes to the number of pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; the preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of a steering agent; and determining the sand-carrying steering effect of the fiber according to the ratio. The method and the device for acquiring the fiber sand-carrying steering effect improve the accuracy of the fiber sand-carrying steering effect.
Description
Technical Field
The invention relates to the technical field of oil reservoir reservoirs, in particular to a method and a device for acquiring a fiber sand-carrying steering effect.
Background
Aiming at the conditions of ultra-deep, ultra-high temperature and ultra-high pressure reservoirs in a Kyoto region, a fiber sand-carrying steering is generally adopted to realize a graded steering process at present. The fiber sand-carrying turning process is characterized in that fibers and propping agents with certain concentration are added into fracturing fluid, and in the pumping process, the fibers and the propping agents with certain concentration form temporary blocking when reaching the position of a fracture seam, so that subsequent fluid is prevented from entering a stratum, namely, the continuous liquid feeding of an eyelet is prevented by blocking the fracture communicated with the perforation eyelet, and the temporary blocking of the perforation eyelet is indirectly formed.
In the prior art, when a fiber sand-carrying steering effect is obtained, the fiber sand-carrying steering effect is usually determined according to parameters such as ground construction pressure change, crack extension pressure change before and after steering, and instantaneous pump-stopping pressure change in the steering process, so that the accuracy of the fiber sand-carrying steering effect is low.
Disclosure of Invention
The invention provides a method and a device for acquiring a fiber sand-carrying steering effect, which are used for improving the accuracy of the fiber sand-carrying steering effect.
The invention provides a method for acquiring a sand-carrying steering effect of fiber, which comprises the following steps:
at a first moment, acquiring a first ground construction pressure before steering;
at a second moment, acquiring the steered second ground construction pressure;
acquiring the ratio of the number of unblocked liquid suction holes to the number of pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; the preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of a steering agent;
and determining the sand-carrying steering effect of the fiber according to the ratio.
In an embodiment of the present invention, the obtaining a ratio of the number of non-blocked liquid suction holes to the number of pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure, and a preset parameter includes:
according to
Obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes;
wherein,
ΔP＝P2-P1；N2indicates the number of said non-occluded pipetting holes, N1Indicating the number of said pre-plugging pipetting holes, P1Representing the first ground construction pressure, P2Indicating the second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown as c, the construction displacement of the steering stage is shown as Q, and the specific gravity of the steering agent is shown as rho.
In an embodiment of the present invention, the determining the fiber sand-carrying steering effect according to the ratio includes:
obtaining the ratio of the number of the blocked liquid sucking holes according to the ratio;
and determining the sand-carrying steering effect of the fiber according to the ratio of the number of the blocked liquid suction holes.
In an embodiment of the present invention, the obtaining the ratio of the number of the blocked imbibition pores according to the ratio includes:
according to
And acquiring the ratio of the number of the blocked imbibition pores.
In an embodiment of the invention, when the pre-plugging imbibition pore is not subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition pore is any value within 0.55 to 0.66; when the preset imbibition hole is subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition hole is any value within 0.95-0.99.
The embodiment of the invention also provides a device for acquiring the sand-carrying steering effect of the fiber, which comprises:
the acquisition unit is used for acquiring first ground construction pressure before steering at a first moment;
the acquisition unit is further used for acquiring the steered second ground construction pressure at a second moment;
the processing unit is used for acquiring the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; the preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of a steering agent;
and the determining unit is used for determining the sand-carrying steering effect of the fiber according to the ratio.
In an embodiment of the invention, the processing unit is specifically configured to
Obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes;
wherein,
ΔP＝P2-P1；N2indicates the number of said non-occluded pipetting holes, N1Indicating the number of said pre-plugging pipetting holes, P1Representing the first ground construction pressure, P2Indicating the second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown as c, the construction displacement of the steering stage is shown as Q, and the specific gravity of the steering agent is shown as rho.
In an embodiment of the present invention, the determining unit is specifically configured to obtain a ratio of the number of the blocked liquid suction holes according to the ratio; and determining the sand-carrying steering effect of the fiber according to the ratio of the number of the blocked liquid suction holes.
In an embodiment of the invention, said determining is performed by a computerUnit, particularly for use in accordance with
And acquiring the ratio of the number of the blocked imbibition pores.
In an embodiment of the invention, when the pre-plugging imbibition pore is not subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition pore is any value within 0.55 to 0.66; when the preset imbibition hole is subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition hole is any value within 0.95-0.99.
According to the method and the device for obtaining the sand-carrying fiber steering effect, the first ground construction pressure before steering is obtained at the first moment; at a second moment, acquiring the steered second ground construction pressure; obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; and then determining the sand-carrying steering effect of the fiber according to the ratio. Therefore, the method and the device for obtaining the fiber sand-carrying steering effect provided by the embodiment of the invention can obtain the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes through the first ground construction pressure, the second ground construction pressure and the preset parameters, and determine the fiber sand-carrying steering effect according to the ratio, so that the accuracy of the fiber sand-carrying steering effect is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for obtaining a fiber sand-carrying steering effect according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fluid-imbibing hole that has not been fractured by sanding according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a sand fractured fluid imbibition hole according to an embodiment of the invention;
FIG. 4 is a schematic view of a steering design provided by an embodiment of the present invention;
FIG. 5 is a schematic illustration of a construction at a turn stage according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for obtaining a fiber sand-carrying steering effect according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The technical means of the present application will be described in detail below with specific examples. It should be noted that the following specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 1 is a schematic flow diagram of a method for obtaining a fiber sand-carrying steering effect according to an embodiment of the present invention, where the method for obtaining the fiber sand-carrying steering effect may be executed by a device for obtaining the fiber sand-carrying steering effect, and the device for obtaining the fiber sand-carrying steering effect may be independently arranged or may be integrated in a processor. Referring to fig. 1, the method for obtaining the sand-carrying fiber steering effect may include:
s101, at a first moment, acquiring a first ground construction pressure before steering.
And S102, acquiring the steered second ground construction pressure at a second moment.
S103, obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters.
The preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of the steering agent.
And S104, determining the sand-carrying steering effect of the fibers according to the ratio.
According to the method for obtaining the sand-carrying fiber steering effect, the first ground construction pressure before steering is obtained at the first moment; at a second moment, acquiring the steered second ground construction pressure; obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; and then determining the sand-carrying steering effect of the fiber according to the ratio. Therefore, according to the method for obtaining the fiber sand-carrying steering effect, provided by the embodiment of the invention, the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes is obtained through the first ground construction pressure, the second ground construction pressure and the preset parameters, and the fiber sand-carrying steering effect is determined according to the ratio, so that the accuracy of the fiber sand-carrying steering effect is improved.
Based on the embodiment corresponding to fig. 1, further based on the embodiment corresponding to fig. 1, in step S103, obtaining a ratio of the number of the non-blocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and a preset parameter, may include:
according to
And obtaining the ratio of the number of the unblocked imbibition pores to the number of the pre-blocked imbibition pores.
Wherein,
ΔP＝P2-P1；N2indicates the number of unblocked pipette holes, N1Indicating the number of pre-plugging orifices, P1Indicates the first ground construction pressure, P2Indicating second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown, Q is construction displacement in a steering stage, and rho is the specific gravity of the steering agent.
Then how to obtain
Is there? In the embodiments of the present invention, the detailed derivation will be made
The establishing process of (1):
at a first moment in time P1+Phyd-Pft-Ppf1-Ptort＝Pc+Pnet(formula 1)
At a second time instant: p2+Phyd-Pft-Ppf2-Ptort＝Pc+Pnet(formula 2)
Wherein: phydRepresents hydrostatic column pressure; pftRepresenting the friction resistance of the pipe column; ppf1Indicating fluid imbibition orifice friction at a first time; ptortIndicating crack bending friction resistance; pcRepresenting the fracture closure pressure corresponding to the 1 st stage main fracture; pnetRepresents the net pressure in the 1 st stage fracture; ppf2Indicating second moment of fluid suction perforation rubbingAnd (4) blocking.
Fluid-absorbing eyelet friction resistance PperfThe calculation formula of (a) is as follows:
optionally, in the embodiment of the present invention, if the pre-plugging liquid suction hole is not subjected to sand fracturing before the fiber sand-carrying steering is performed, the flow coefficient of the shape of the pre-plugging liquid suction hole is any value within a range from 0.55 to 0.66; when the preset imbibition hole is subjected to sand fracturing, the flow coefficient of the shape of the pre-blocking imbibition hole is any value within 0.95-0.99. For example, referring to fig. 2, fig. 2 is a schematic structural diagram of a fluid suction hole that has not undergone sand fracturing according to an embodiment of the present invention, in the embodiment of the present invention, when a pre-plugging fluid suction hole has not undergone sand fracturing, an initial value of a flow coefficient of a shape of the pre-plugging fluid suction hole is usually 0.61; referring to fig. 3, fig. 3 is a schematic structural diagram of a liquid suction hole subjected to sand fracturing according to an embodiment of the present invention, and in a deep area, when a preset liquid suction hole is subjected to sand fracturing (sand fracturing 50t-60t), a flow coefficient of a shape of the pre-plugging liquid suction hole is 0.98.
From equation 1 and equation 2, we can obtain:
P2-P1＝Ppf2-Ppf1Δ P (equation 4)
Order to
The following formula is obtained:
order to
The following formula is obtained:
the number N of the unblocked liquid suction holes2And the number N of the pre-plugging liquid suction holes1The ratio of (A) to (B):
Obtaining the number N of the unblocked imbibition holes2And the number N of the pre-plugging liquid suction holes1And then determining the sand-carrying steering effect of the fiber according to the ratio. In the embodiment of the invention, two possible implementation manners are available for determining the fiber sand-carrying steering effect according to the ratio:
in a first possible implementation, the fiber sand-carrying steering effect may be determined directly from the ratio, which is inversely proportional to the fiber sand-carrying steering effect.
Illustratively, the number N of aspirating holes if not blocked2And the number N of the pre-plugging liquid suction holes1If the ratio of (1) to (2) is 23%, the sand-carrying steering effect of the fiber is 77%, and if the liquid suction holes are not blocked, the number N of the liquid suction holes is2And the number N of the pre-plugging liquid suction holes1The ratio of (a) to (b) is 40%, the sand-carrying turning effect of the fiber is 60%.
In a second possible implementation manner, the ratio of the number of the blocked imbibition pores can be obtained according to the ratio; and determining the fiber sand-carrying steering effect according to the ratio of the number of the blocked liquid suction holes, wherein the ratio is in direct proportion to the fiber sand-carrying steering effect.
Optionally, in the embodiment of the present invention, obtaining the ratio of the number of the blocked imbibition pores according to the ratio may include:
according to
And acquiring the ratio of the number of the blocked imbibition pores.
Exemplary, if not, the number of pipette holesMesh N2And the number N of the pre-plugging liquid suction holes1The ratio of (1) is 23%, the ratio of the number of the blocked liquid suction holes to the number of the unblocked liquid suction holes can be obtained according to the ratio and is 77%, the fiber sand-carrying steering effect is 77%, and if the number of the unblocked liquid suction holes is N2And the number N of the pre-plugging liquid suction holes1The ratio of the number of the blocked liquid suction holes is 40%, the ratio of the number of the blocked liquid suction holes is 60%, and the fiber sand carrying steering effect is 66%.
Therefore, according to the method for obtaining the fiber sand-carrying steering effect, the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes is obtained through the first ground construction pressure, the second ground construction pressure and the preset parameters, the ratio of the number of the blocked liquid suction holes is obtained according to the ratio, then the fiber sand-carrying steering effect is determined according to the ratio, and more importantly, the specific value of the fiber sand-carrying steering effect can be determined, so that the accuracy of the fiber sand-carrying steering effect is improved. Meanwhile, reference can also be provided for obtaining the subsequent fiber sand-carrying steering effect, for example, please refer to the following table 1:
TABLE 1 combination of fiber sand-carrying steering construction parameters
As can be seen from Table 1, the fiber concentration is generally in the range of 11-18kg/m 3; the value range of the proppant concentration is 240-; the volume of the fiber slug ranges from 1.5m to 9.5m 3; the value range of the speed of the diverting agent entering the stratum is 1.5-3m 3/min. For the steering construction with 2 blocks of gram depth, the fiber concentration can be 12kg/m 3; the proppant concentration may take the value of 300kg/m 3; the volume of the fiber slug can take the value of 9m 3; the velocity of the diverting agent into the formation may take on the order of 2m 3/min.
Referring now to fig. 4, fig. 4 shows the present inventionThe schematic diagram of a steering design provided by the embodiment can be seen in combination with fig. 4: before steering, the steering agent enters a reservoir, the region 1 and the region 2 are cracked firstly, and the liquid inlet quantity of the stratum is q1>q 2; in diversion, the stratum liquid inlet profile of the diverting agent is consistent with the diversion liquid inlet profile, and the diverting amount entering the stratum is q1>q 2; after diversion, most of the diverting agent enters the area 1, the liquid suction holes of the area 1 are temporarily blocked, the stratum liquid inlet section is changed, and q2 exists in the subsequent construction process>q 1. Based on the steering design shown in fig. 4, please refer to fig. 5, and fig. 5 is a construction diagram of a steering stage according to an embodiment of the present invention; as can be seen from fig. 5, in the diversion agent laying stage, the ground construction pressure is gradually increased from 65.6MPa to 72MPa, Δ P is 6.4MPa, the construction displacement Q in the diversion stage is 1.5m3/min, the liquid specific gravity ρ of the diversion agent is 1.3, the diameter dp of the pre-plugging liquid suction hole is 8.6mm, the flow coefficient c of the pre-plugging liquid suction hole is 0.98, and the number N of the pre-plugging liquid suction holes is 0.6 mm1By adopting the method for obtaining the fiber sand-carrying steering effect provided by the embodiment of the invention, the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes is 7%, the ratio of the number of the blocked liquid suction holes is 93%, the fiber sand-carrying steering effect is 93%, and the accuracy of the fiber sand-carrying steering effect is improved.
Fig. 6 is a schematic structural diagram of an apparatus 60 for obtaining a fiber sand-carrying steering effect according to an embodiment of the present invention, and it should be understood that the embodiment of the present invention is only illustrated in fig. 6, but the present invention is not limited thereto. Referring to fig. 6, the apparatus 60 for obtaining the fiber sand-carrying steering effect includes:
the obtaining unit 601 is configured to obtain, at a first time, a first ground construction pressure before steering.
The obtaining unit 601 is further configured to obtain the steered second ground construction pressure at a second time.
The processing unit 602 is configured to obtain a ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and a preset parameter; the preset parameters comprise the diameter of the pre-plugging liquid-absorbing hole, the shape flow coefficient of the pre-plugging liquid-absorbing hole, the construction displacement in the steering stage and the specific gravity of the steering agent.
And the determining unit 603 is used for determining the sand-carrying steering effect of the fibers according to the ratio.
Optionally, the processing unit 602 is specifically configured to
And obtaining the ratio of the number of the unblocked imbibition pores to the number of the pre-blocked imbibition pores.
Wherein,
ΔP＝P2-P1；N2indicates the number of unblocked pipette holes, N1Indicating the number of pre-plugging orifices, P1Indicates the first ground construction pressure, P2Indicating second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown, Q is construction displacement in a steering stage, and rho is the specific gravity of the steering agent.
Optionally, the determining unit 603 is specifically configured to obtain a ratio of the number of the blocked imbibition pores according to the ratio; and determining the sand-carrying steering effect of the fiber according to the ratio of the number of the blocked liquid suction holes.
Optionally, the determining unit 603 is specifically configured to determine according to
And acquiring the ratio of the number of the blocked imbibition pores.
Optionally, when the pre-plugging imbibition pore is not subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition pore is any value within 0.55 to 0.66; when the preset imbibition hole is subjected to sand fracturing, the flow coefficient of the shape of the pre-blocking imbibition hole is any value within 0.95-0.99.
The device 60 for acquiring a fiber sand-carrying steering effect according to the embodiment of the present invention can implement the technical solution shown in the embodiment of the method for acquiring a fiber sand-carrying steering effect, and the implementation principle and the beneficial effects thereof are similar, and are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for obtaining a fiber sand-carrying steering effect is characterized by comprising the following steps:
at a first moment, acquiring a first ground construction pressure before steering;
at a second moment, acquiring the steered second ground construction pressure;
acquiring the ratio of the number of unblocked liquid suction holes to the number of pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; the preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of a steering agent;
determining the sand-carrying steering effect of the fiber according to the ratio;
wherein, according to first ground construction pressure, second ground construction pressure and preset parameter acquire not stifled imbibition punchhole figure and block up the specific value of imbibition punchhole number in advance, include:
according to
Obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes, wherein,
，
，
；N2indicates the number of said non-occluded pipetting holes, N1Indicating the number of said pre-plugging pipetting holes, P1Representing the first ground construction pressure, P2Indicating the second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown as c, the construction displacement of the steering stage is shown as Q, and the specific gravity of the steering agent is shown as rho.
2. The method of claim 1, wherein determining the fiber sand-carrying steering effect as a function of the ratio comprises:
obtaining the ratio of the number of the blocked liquid sucking holes according to the ratio;
and determining the sand-carrying steering effect of the fiber according to the ratio of the number of the blocked liquid suction holes.
3. The method of claim 2, wherein said obtaining a ratio of the number of said blocked pipette holes from said ratio comprises:
according to
And acquiring the ratio of the number of the blocked imbibition pores.
4. The method according to any one of claims 1 to 3,
when the pre-plugging imbibition pore is not subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition pore is any value within 0.55-0.66; when the pre-plugging liquid suction hole is subjected to sand fracturing, the shape flow coefficient of the pre-plugging liquid suction hole is any value within 0.95-0.99.
5. The utility model provides a fibre takes sand to turn to acquisition device of effect which characterized in that includes:
the acquisition unit is used for acquiring first ground construction pressure before steering at a first moment;
the acquisition unit is further used for acquiring the steered second ground construction pressure at a second moment;
the processing unit is used for acquiring the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes according to the first ground construction pressure, the second ground construction pressure and preset parameters; the preset parameters comprise the diameter of the pre-plugging liquid suction hole, the shape flow coefficient of the pre-plugging liquid suction hole, the construction displacement in the steering stage and the specific gravity of a steering agent;
the determining unit is used for determining the sand-carrying steering effect of the fiber according to the ratio;
wherein the processing unit is specifically configured to:
according to
Obtaining the ratio of the number of the unblocked liquid suction holes to the number of the pre-blocked liquid suction holes, wherein,
，
，
；N2indicates the number of said non-occluded pipetting holes, N1Indicating the number of said pre-plugging pipetting holes, P1Representing the first ground construction pressure, P2Indicating the second ground construction pressure, dpThe diameter of the pre-plugging liquid suction hole is shown, the flow coefficient of the shape of the pre-plugging liquid suction hole is shown as c, the construction displacement of the steering stage is shown as Q, and the specific gravity of the steering agent is shown as rho.
6. The apparatus of claim 5,
the determining unit is specifically used for acquiring the ratio of the number of the blocked liquid sucking holes according to the ratio; and determining the sand-carrying steering effect of the fiber according to the ratio of the number of the blocked liquid suction holes.
7. The apparatus of claim 6,
the determination unit is specifically used for determining
And acquiring the ratio of the number of the blocked imbibition pores.
8. The apparatus according to any one of claims 5 to 7,
when the pre-plugging imbibition pore is not subjected to sand fracturing, the shape flow coefficient of the pre-plugging imbibition pore is any value within 0.55-0.66; when the pre-plugging liquid suction hole is subjected to sand fracturing, the shape flow coefficient of the pre-plugging liquid suction hole is any value within 0.95-0.99.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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