CN106593408A - Method and device for acquiring flow velocity of oil well - Google Patents
Method and device for acquiring flow velocity of oil well Download PDFInfo
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- CN106593408A CN106593408A CN201611154960.9A CN201611154960A CN106593408A CN 106593408 A CN106593408 A CN 106593408A CN 201611154960 A CN201611154960 A CN 201611154960A CN 106593408 A CN106593408 A CN 106593408A
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- 239000003129 oil well Substances 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 70
- 239000012530 fluid Substances 0.000 claims abstract description 210
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical group C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 claims description 33
- 230000005484 gravity Effects 0.000 claims description 8
- 230000002285 radioactive effect Effects 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000011156 evaluation Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 13
- 238000005259 measurement Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 3
- 238000005381 potential energy Methods 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- E21B47/00—Survey of boreholes or wells
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention provides a method and a device for acquiring the flow velocity of an oil well. The method comprises the following steps: acquiring a pressure differential of a fluid and a density of the fluid in a well section of the oil well; wherein the pressure differential is a difference in fluid pressure across the well section; determining a flow rate of the well based on the pressure differential of the fluid and the density of the fluid. According to the technical method, when the flow rate of the oil well cannot be accurately measured due to the problem of the densimeter in the production process, the flow rate of the oil well is accurately calculated through the fluid pressure difference and the fluid density value of the well section of the oil well, and therefore the reliability of oil well evaluation is improved.
Description
Technical field
The present invention relates to Oil/gas Well logging technique, more particularly to a kind of acquisition methods and device of oil well flow velocity.
Background technology
In the production process of oil, the yield of shaft bottom payzone is generally determined with flow.Flow rate log is in assessment production
The dynamic output aspect of well has critical effect, and in flow rate log, its key is the stream for accurately measuring borehole fluid
Speed.
At present the method for the yield of measurement payzone, mainly will enter oil under the flowmeter of different measuring scope and metering system
Guan Zhong, using flowmeter to measure oil pipe in fluid flow velocity, and then determine payzone yield.
But, during oil mining, crude oil direct output from the oil jacket annular space of oil pipe and sleeve pipe is frequently encountered,
And without flowmeter, and then cause flowmeter accurately to measure the yield of payzone.
The content of the invention
The embodiment of the present invention provides a kind of acquisition methods and device of oil well flow velocity, and for solving prior art flowmeter is worked as
When going wrong, it is impossible to accurately obtain the flow of oil well, and then cannot accurately measure the technical problem of oily well yield.
In a first aspect, the present invention provides a kind of acquisition methods of oil well flow velocity, the oil well includes multiple well sections, the side
Method includes：
Obtain the density of the pressure differential of fluid and fluid in the well section of the oil well；Wherein, the pressure differential is the well
The difference of the Fluid pressure at section two ends；
According to the pressure differential and the density of the fluid of the fluid, the flow velocity of the oil well is determined.
It is described according to the fluid with reference to above-mentioned in a first aspect, in the first implementation of first aspect present invention
Pressure differential and the fluid density, determine the flow velocity of the oil well, specifically include：
Obtain length, the coefficient of friction between the tubing string of the well section and the fluid and the well of the well section
The diameter of the tubing string of section；
Pressure differential, the density of the fluid of the well section according to the fluid of the well section, the length of the well section, the well
The diameter of the tubing string of coefficient of friction and the well section between the tubing string and the fluid of section, determines the flow velocity of the oil well.
It is described according to the well section with reference to above-mentioned in a first aspect, in second implementation of first aspect present invention
The pressure differential of fluid, the density of the fluid of the well section, the length of the well section, the tubing string of the well section and the fluid it
Between coefficient of friction and the well section tubing string diameter, determine the flow velocity of the oil well, specifically include：
According to formula：Calculate the flow velocity of the oil well：Wherein, the vmFor the oil well
Flow velocity, the length of well section described in the dz, the dp is the pressure differential of the fluid of the well section, the ρrFor the stream of the well section
The density of body, the fmThe coefficient of friction between tubing string and the fluid for the well section, the D is the tubing string of the well section
Diameter, the g be acceleration of gravity.
With reference to above-mentioned in a first aspect, in the third implementation of first aspect present invention, obtaining the well of the oil well
The pressure differential and density value of fluid, specifically includes in section：
Obtain the pressure differential and the density of fluid of fluid in the oil well each well section；
Then, it is described according to formula：The flow velocity of the oil well is calculated, is specifically included：
According to formula：The pressure differential of the fluid of each well section, each well section
Coefficient of friction between the density of fluid, the length of each well section, the tubing string of each well section and the fluid and
The diameter of the tubing string of each well section, determines the flow velocity of each well section；
According to the flow velocity of each well section, the flow velocity of the oil well is determined.
With reference to above-mentioned in a first aspect, in the 4th kind of implementation of first aspect present invention, methods described also includes：
According to the flow velocity of each well section, the payzone position of the oil well is determined.
It is described according to each with reference to above-mentioned in a first aspect, in the 5th kind of implementation of first aspect present invention
The flow velocity of well section, determines the payzone position of the oil well, specifically includes：
According to the coefficient of friction between the tubing string and fluid of each well section, the diameter of the tubing string of each well section and
The flow velocity of each well section, determines the yield assessment parameter of each well section；
Judge the yield assessment parameter of each well section whether more than predetermined threshold value；
If, it is determined that the well section is the payzone position of the oil well.
It is described according to each with reference to above-mentioned in a first aspect, in the 6th kind of implementation of first aspect present invention
The flow velocity of coefficient of friction, the diameter of the tubing string of each well section and each well section between the tubing string and fluid of well section,
Determine the yield assessment parameter of each well section, specifically include：
According to formulaDetermine the yield assessment parameter F (V of each well sectionm)。
Alternatively, the density of fluid in the well section of the oil well is obtained, is specifically included：
Density of the density value that radioactive density meter in the well section is measured as the fluid of the well section.
Second aspect, the present invention provides a kind of acquisition device of oil well flow velocity, and the oil well includes multiple well sections, the dress
Put including：
Acquisition module, for the pressure differential and the density of fluid of fluid in the well section for obtaining the oil well；Wherein, the pressure
Power difference is the difference of the Fluid pressure at the well section two ends；
Computing module, for according to the density of the pressure differential of the fluid and the fluid, determining the flow velocity of the oil well.
With reference to above-mentioned second aspect, in the first implementation of second aspect present invention, the computing module, specifically
For obtaining length, the coefficient of friction between the tubing string of the well section and the fluid and the well section of the well section
The diameter of tubing string；And the pressure differential according to the fluid of the well section, the density of the fluid of the well section, the length of the well section,
The diameter of the tubing string of coefficient of friction and the well section between the tubing string of the well section and the fluid, determines the oil well
Flow velocity.
With reference to above-mentioned second aspect, in second implementation of second aspect present invention, the computing module, specifically
For according to formula：Calculate the flow velocity of the oil well：
Wherein, the vmFor the flow velocity of the oil well, the length of well section described in the dz, the dp is the stream of the well section
The pressure differential of body, the ρrFor the density of the fluid of the well section, the fmBetween tubing string and the fluid for the well section
Coefficient of friction, the D is the diameter of the tubing string of the well section, and the g is acceleration of gravity.
With reference to above-mentioned second aspect, in the third implementation of second aspect present invention, the acquisition module also has
Body is used to obtain the pressure differential and the density of fluid of fluid in the oil well each well section；
Then, the computing module, is additionally operable to according to formula：The fluid of each well section
Pressure differential, the density of the fluid of each well section, the length of each well section, the tubing string of each well section with it is described
The diameter of the tubing string of coefficient of friction and each well section between fluid, determines the flow velocity of each well section；And according to
The flow velocity of each well section, determines the flow velocity of the oil well.
With reference to above-mentioned second aspect, in the 4th kind of implementation of second aspect present invention, described device also includes sentencing
Disconnected module：
The judge module, for according to the flow velocity of each well section, determining the payzone position of the oil well.
With reference to above-mentioned second aspect, in the 5th kind of implementation of second aspect present invention, the judge module, specifically
For the coefficient of friction between the tubing string and fluid according to each well section, the diameter of the tubing string of each well section and each
The flow velocity of the well section, determines the yield assessment parameter of each well section；And judge that the yield assessment of each well section is joined
Whether number is more than predetermined threshold value；If, it is determined that the well section is the payzone position of the oil well.
With reference to above-mentioned second aspect, in the 6th kind of implementation of second aspect present invention, the judge module, specifically
For according to formulaDetermine the yield assessment parameter F (V of each well sectionm)。
Alternatively, the acquisition module, specifically for the density value of the radioactive density meter measurement in the well section is made
For the density of the fluid of the well section.
The acquisition methods of the oil well flow velocity that the present invention is provided, by obtaining oil well well section in fluid pressure differential and fluid
Density, according to the pressure differential of fluid and the density of fluid the flow velocity of oil well is determined, and then is solved in process of production due to close
Degree meter problem cannot accurately measure the flow velocity of oil well, it is impossible to accurately judge the problem of oily well yield, the technical side of the present embodiment
Method, the fluid pressure differential and fluid density value that can pass through oil well well section accurately calculates the flow velocity of producing well, and then improves oil
The reliability of well assessment.
Description of the drawings
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 existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The schematic flow sheet of the acquisition methods embodiment one of the oil well flow velocity that Fig. 1 is provided for the present invention；
The schematic flow sheet of the acquisition methods embodiment two of the oil well flow velocity that Fig. 2 is provided for the present invention；
Fig. 2 a are the schematic diagram that incompressible perfect fluid flows along streamline；
The schematic flow sheet of the acquisition methods embodiment three of the oil well flow velocity that Fig. 3 is provided for the present invention；
Fig. 3 a are the flow schematic diagram of non-payzone (non-perforation layer) fluid；
Fig. 3 b are the flow schematic diagram of payzone (perforation layer) fluid；
The schematic flow sheet of the acquisition methods example IV of the oil well flow velocity that Fig. 4 is provided for the present invention；
Fig. 4 a are Tarim Basin somewhere KLXX well 3710-3800 rice well log interpretation result maps；
The structural representation of the acquisition device embodiment one of the oil well flow velocity that Fig. 5 is provided for the present invention；
The structural representation of the acquisition device embodiment two of the oil well flow velocity that Fig. 6 is provided for the present invention.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The present invention provides a kind of acquisition methods and device of oil well flow velocity, for solving prior art when asking occurs in flowmeter
During topic, it is impossible to accurately obtain the flow of oil well, and then cannot accurately measure the technical problem of oily well yield.
The method that the present invention is provided, by the fluid pressure differential and fluid density value of oil well the flow velocity of oil well is calculated, and then
Solve in the case that flowmeter cannot measure the flow velocity of oil well, by calculating the flow velocity for accurately obtaining oil well.
Below technical scheme is described in detail with specifically embodiment.These specific enforcements below
Example can be combined with each other, for same or analogous concept or process may be repeated no more in some embodiments.
The schematic flow sheet of the acquisition methods embodiment one of the oil well flow velocity that Fig. 1 is provided for the present invention.The present embodiment is held
Row main body can be the acquisition device of the oil well flow velocity with computing function or the equipment for being integrated with the device, such as：It is mobile
Terminal, panel computer and notebook computer etc., illustrate for convenience, hereinafter referred to as acquisition device.This embodiment is referred to
Acquisition device determines the detailed process of oil well flow velocity according to the pressure differential and density of oily FIH.As shown in figure 1, the present embodiment
Method include：
The pressure differential and the density of fluid of fluid in S101, the well section of the acquisition oil well；Wherein, the pressure differential is institute
State the difference of the Fluid pressure at well section two ends.
It should be noted that the oil well of the present embodiment includes multiple well sections, in the production process of oil well, measurement oil is needed
The density of FIH, forms the density data of the oil well, measures the pressure value of fluid in each well section, forms the pressure of the oil well
Power data, it is also desirable to measure the other well completion datas for preserving the oil well, such as keeping a grip in each well section in oil well
The data such as length, the diameter of the tubing string.
Specifically, it is research object that the present embodiment can select a well section of oil well, is obtained from the PRESSURE DATA of oil well
The pressure value of the two ends fluid (i.e. crude oil) of the well section is obtained, the pressure value at the well section two ends is made the difference, obtain the well section fluid
Pressure differential.Meanwhile, the density value of fluid in the well section is obtained from density data.
Optionally, the present embodiment is also an option that multiple well sections of oil well are research object, according to said method from
PRESSURE DATA and density data in obtain the pressure differential and density value of above-mentioned each well section respectively.
The density of S102, the pressure differential according to the fluid and the fluid, determines the flow velocity of the oil well.
Specifically, acquisition device according to the method for above-mentioned S101 obtain oil well well section in fluid pressure differential and fluid it is close
Degree, determines the flow velocity of fluid in the well section, by the flow velocity of fluid in the well section according to the fluid pressure differential and density value of the well section
As the flow velocity of the oil well.For example acquisition device can be close according to conservation of energy principle, the pressure differential of the well section fluid and fluid
Degree calculates the flow velocity of the well section.
Optionally, the present embodiment can be with according to the fluid pressure differential and fluid of the multiple well sections of the method for above-mentioned S101 acquisition
Density, according to the fluid pressure differential and fluid density of each well section, calculates the corresponding flow velocity of each well section, by the stream of each well section
Flow velocity of the mean value of speed as oil well.Alternatively, the mean value of the fluid pressure differential of above-mentioned multiple well sections can also be calculated, will
The mean value of the pressure differential calculates the mean value of the fluid density of above-mentioned multiple well sections, by the density as the pressure differential of oil well
Mean value as oil well density, the pressure differential and density of the oil well obtained according to above-mentioned calculating determine the flow velocity of oil well.Can
Selection of land, can be according to the pressure differential and density value of each well section, to calculate the flow velocity of each well section, according to each well section flow velocity
The weighted average of above-mentioned all well section flow velocitys is sought in situation of change, calculating, using the weighted average as oil well flow velocity.It is optional
Ground, the present embodiment can to determine the flow velocity of oil well according to other methods, the present embodiment to the computing formula of oil well flow velocity not
It is limited, as long as calculated according to the pressure differential and density of oil well well section.
In the present embodiment, pressometer and density measure machine are provided with each well section of oil well, for measuring
The pressure value and density value of fluid in each well section.Alternatively, the present embodiment can adopt quartz crystal pressure meter.The quartz-crystal
Body pressure gauge is made up of shell, monolithic quartz crystal, heat-conducting plate and pressure buffer pipe.Quartz crystal is pressure sensor, crystal
The frequency of resonator is relevant with pressure size, and measuring resonant frequency can just calculate pressure value.Radioactive density meter can be adopted
The flow velocity of measurement fluid, its certainty of measurement of the radioactive density meter is high, can accurately measure the density of fluid.
The acquisition methods of the oil well flow velocity that the present invention is provided, by obtaining oil well well section in fluid pressure differential and fluid
Density, according to the pressure differential of fluid and the density of fluid the flow velocity of oil well is determined, and then is solved in process of production due to close
Degree meter problem cannot accurately measure the flow velocity of oil well, it is impossible to accurately judge the problem of oily well yield, the technical side of the present embodiment
Method, the fluid pressure differential and fluid density value that can pass through oil well well section accurately calculates the flow velocity of producing well, and then improves oil
The reliability of well assessment.
The schematic flow sheet of the acquisition methods embodiment two of the oil well flow velocity that Fig. 2 is provided for the present invention.In above-described embodiment
On the basis of, the present embodiment refers to the flow velocity that acquisition device determines according to the pressure differential of fluid and the density of fluid oil well
Detailed process.I.e. above-mentioned S102 specifically can include：
S201, the length, the coefficient of friction between the tubing string of the well section and the fluid, the Yi Jisuo that obtain the well section
State the diameter of the tubing string of well section.
Specifically, acquisition device obtains well section length, the tubing string of the well section and the stream of oil well according to existing well completion data
Coefficient of friction between body, and the diameter of the tubing string of the well section.
S202, the pressure differential according to the fluid of the well section, the density of the fluid of the well section, the length of the well section,
The diameter of the tubing string of coefficient of friction and the well section between the tubing string of the well section and the fluid, determines the oil well
Flow velocity.
Specifically, acquisition device obtains the fluid pressure differential of the well section according to the method for above-mentioned S101 from PRESSURE DATA,
The fluid density of the well section is obtained from density data, and according to the method for above-mentioned S201, obtains the length of the tubing string of the well section,
And the coefficient of friction between the tubing string and fluid of the well section.Pressure differential and density value, the well then according to the well section fluid
Length, the coefficient of friction between the diameter of the tubing string of the well section, and the tubing string and fluid of the well section of section, determines the well section
Flow velocity, using the flow velocity of the well section as oil well flow velocity.
Optionally, pressure differential, the density of the fluid of the well section, the well of the acquisition device according to the fluid of the well section
The diameter of the tubing string of the length, the coefficient of friction between the tubing string of the well section and the fluid and the well section of section, it is determined that
The flow velocity of the oil well, can be specifically
According to formula：Calculate the flow velocity of the oil well.
Wherein, the vmFor the flow velocity of the oil well, the length of well section described in the dz, the dp is the stream of the well section
The pressure differential of body, the ρrFor the density of the fluid of the well section, the fmBetween tubing string and the fluid for the well section
Coefficient of friction, the D is the diameter of the tubing string of the well section, and the g is acceleration of gravity.
The specific derivation process of the computing formula of above-mentioned oil well flow velocity described briefly below：
Steady flow, preferable incompressible fluid under gravity field action is along streamline or the Bernoulli Jacob side of fluid field of no rotation
Formula is：
Formula (1) illustrated under above-mentioned qualifications, the pressure energy of any pointPotential energy gz, kinetic energySum is constant C
As shown in Figure 2 a, for two sections along streamline, under steady flow, gravity field action, incompressible ideal
Fluid can be write as along the bernoulli's equation of streamline
But for real fluid, due to toughness power, just there is flow resistance, in order to overcome this flow resistance, need to disappear
Consume a part of mechanical energy.In three mechanical energy of above formula, potential energy one is only determined by the position z in section 1,21And z2, when position is fixed
When, its potential energy will not change.Kinetic energy one is constrained by the condition of continuity, as long as flow area of section A1、A2Constant, kinetic energy is not
Can change.As shown in Figure 3 a, the fluid pressure value that fluid Jing sections 1 are flowed at section 2, therefore section 1 is more than the stream at section 2
Body pressure value, i.e. p1<p2, therefore in real fluid
It is above-mentioned to be designated as：
Average speed and kinetic energy correction factor are introduced at section, above formula arranges and is：
H in formulafRepresent drag losses of the fluid by suffered by section 1 flow to section 2, that is, real fluid flow losses
Mechanical energy.The mechanical energy of this partial loss, is changed into heat energy, increased the interior energy of fluid.
Z in above formula1、z2For section A1And A2Two depth points；p1、p2For section A1And A2Corresponding pressure；ρ1、ρ2To cut
Face A1And A2Corresponding density；v1、v2For section A1And A2Corresponding fluid average speed；G is acceleration of gravity；hfFor unit matter
Amount fluid is by the average loss of energy between 1/2 two sections；α1、α2For kinetic energy correction factor.
In production logging, it is believed that fluid density is constant between upper and lower bellows, and for steady flow, Bernoulli Jacob is met
Restrictive condition.The section A at upper and lower bellows1And A2When equal, v is understood by the condition of continuity1、v2It is equal, ρ1、ρ2It is also equal,
α1=α2=1, i.e.,：
v1=v2=vm (5)
ρ1=ρ2=ρm (6)
V in formulamIt is the average speed along streamline；ρmIt is the averag density along streamline.
Wherein, frictional head loss formula is
Bring (5) formula (6) formula and (7) formula into (4) formula to arrange
The radioactive density meter used in actual well measurement is measuring the density of fluid, and radioactive density meter is measured
More accurately, generally using its measured value as actual value ρr, i.e.,
ρm=ρr (9)
Formula (8) is arranged can be obtained
Wherein, v1=v2=vm, therefore, obtain the flow velocity of oil well
The method of the present embodiment, can select one section of well section for research object, the pressure differential, density value according to the well section with
And other well-log informations, and with reference to conservation of energy principle through deriving the computing formula for obtaining oil well flow velocity.That is the present embodiment
Method, during the measurement of oil well, it is possible to use the PRESSURE DATA and density data of oil well, according to above-mentioned oil well flow velocity
Computing formula can obtain the flow velocity of oil well, and then solve when flowmeter goes wrong, it is impossible to accurately obtain oil well
Flow, and then cannot accurately measure the problem of oily well yield.
The acquisition methods of the oil well flow velocity that the present invention is provided, by the pressure differential of the fluid of oil well well section, the stream of the well section
The tubing string of coefficient of friction and the well section between the density of body, the length of the well section, the tubing string of the well section and fluid it is straight
Footpath, determines the flow velocity of oil well, and then realizes in the evaluation process of oil well, when the flowmeter in shaft bottom occurs problem, it is impossible to accurate
Really during the flow velocity of measurement oil well, the fluid pressure differential of oil well well section, fluid density can be passed through, diameter is kept a grip on, and the well section
In keep a grip on coefficient of friction with fluid, accurately calculate the flow velocity of producing well, and then improve the reliability of oil well assessment.
The schematic flow sheet of the acquisition methods embodiment three of the oil well flow velocity that Fig. 3 is provided for the present invention.In above-described embodiment
On the basis of, the present embodiment refers to acquisition device and determines oil well according to the fluid pressure differential and fluid density of per section of oil well
The detailed process of flow velocity.As shown in figure 3, the method for the present embodiment can include：
S301, the pressure differential and the density of fluid that obtain fluid in described each well section of oil well.
Specifically, when needing to calculate the flow velocity of oil well each well section, then above-mentioned S101 obtains fluid in the well section of oil well
Pressure differential and density value, can be specifically that acquisition device obtains respectively each well section correspondence from PRESSURE DATA, density data
Fluid pressure differential, fluid density.For example, it is assumed that the oil well includes 5 well sections, then acquisition device needs to be obtained from PRESSURE DATA
Take the pressure value at 5 each well section two ends of well section, and then obtain the pressure differential of the fluid of each well section, from density data each
The density value of well section.
S302, according to formula：The pressure differential of the fluid of each well section, described in each
Friction system between the density of the fluid of well section, the length of each well section, the tubing string of each well section and the fluid
The diameter of the tubing string of number and each well section, determines the flow velocity of each well section.
Specifically, acquisition device obtains the pressure differential and each well section of the fluid of each well section according to the method for above-mentioned S301
Fluid density value, and the length of each well section, the diameter of the tubing string of each well section are obtained from other well completion datas, and
Coefficient of friction between the tubing string and fluid of each well section.Then, the above-mentioned data of each well section for obtaining are substituted into into formulaCalculate the flow velocity of each well section.
S303, according to the flow velocity of each well section, determine the flow velocity of the oil well.
Specifically, acquisition device is calculated after the flow velocity of each well section according to the method for above-mentioned S302, according to each well section
Flow velocity determine the flow velocity of whole oil well.For example, can using the mean value of the flow velocity of all well sections as oil well flow velocity, it is optional
Ground, can also using the weighted average of the flow velocity of each well section as oil well flow velocity, alternatively, can be with according to different well sections
Position relationship between production pay determines the flow velocity of oil well, and the present embodiment determines oil well to the flow velocity according to each well section
The concrete grammar of flow velocity is not limited.The method of the present embodiment, by calculating the flow velocity of each well section whole oil well is determined
Flow velocity, and then improve the accuracy for determining oil well flow velocity.
Further, the method for the present invention, can be according to the flow velocity of each well section, determining the payzone of the oil well
Position.
Specifically, Fig. 3 a are the flow schematic diagram of non-payzone (non-perforation layer) fluid, and Fig. 3 b are payzone (perforation layer) fluid
Flow schematic diagram.As shown in Figure 3 a, in non-payzone, the flowing of fluid is more steady, it can be understood as now fluid is in laminar flow
State, the flow velocity of fluid is more steady.In payzone, crude oil flows out from perforation, has certain disturbing to the fluid in laminar condition
Action is used, and now fluid is converted into turbulent condition by laminar condition, and its flow velocity fluctuates up and down.It follows that the present embodiment can be with
The position of generation is determined with the situation of change of the flow velocity of adjacent well section according to the flow velocity of each well section, for example, at well section A
When the flow velocity of fluid is more than the flow velocity of adjacent well section B and well section C, illustrate that well section A is payzone.Alternatively, the present embodiment according to
The flow velocity of each well section, it is possible to obtain the curve synoptic diagram of the flow velocity of all well sections, determines oil from the curve synoptic diagram of flow velocity
The payzone of well, for example, when the amplitude of the corresponding flow velocity of a certain well section is more than preset value, it is determined that the well section is payzone.I.e. originally
The method of embodiment, not only can determine the flow velocity of oil well according to the flow velocity of each well section, and then judge oily well capacity, may be used also
To judge the payzone of producing well according to the flow velocity of each well section, the reliability of oil well assessment is further increased.
The acquisition methods of the oil well flow velocity of the present invention, by the flow velocity of each well section in calculating oil well the stream of oil well is determined
Speed, and then improve the accuracy for calculating oil well flow velocity.Further, the present embodiment can be sentenced with the flow velocity according to each well section
The payzone position of oil-break well, and then provide reliable foundation for follow-up oil mining and evaluation work.
The schematic flow sheet of the acquisition methods example IV of the oil well flow velocity that Fig. 4 is provided for the present invention.In above-described embodiment
On the basis of, the acquisition device that the present embodiment is related to determines the concrete mistake of the payzone position of oil well according to the flow velocity of each well section
Journey.As shown in figure 4, above-mentioned S303 has can include：
S401, according to coefficient of friction between the tubing string and fluid of each well section, the tubing string of each well section
The flow velocity of diameter and each well section, determines the yield assessment parameter of each well section.
Specifically, acquisition device obtains the tubing string and stream of each well section according to the method for above-mentioned S203 from well completion data
The diameter of the tubing string of coefficient of friction, each well section between body, and the stream of each well section is obtained according to the method for above-mentioned S302
Speed.Then, according to the coefficient of friction between the tubing string and fluid of each well section, the diameter of the tubing string of each well section, and each
The flow velocity of well section, calculates the yield assessment parameter of each well section.
Optionally, acquisition device is according to the coefficient of friction between the tubing string and fluid of each well section, each described well
The diameter of the tubing string of section and the flow velocity of each well section, determine the yield assessment parameter of each well section, can be specifically：
According to formulaDetermine the yield assessment parameter F (V of each well sectionm).I.e. the present embodiment will be above-mentioned
Coefficient of friction f between the tubing string and fluid of each well section for obtainingm, each well section tubing string diameter D, and each well section
Flow velocity vmSubstitute into above-mentioned formula, you can obtain the yield assessment parameter of each well section.
S402, judge the yield assessment parameter of each well section whether more than predetermined threshold value.
If S403, it is determined that the well section is the payzone position of the oil well.
Specifically, acquisition device obtains the yield assessment parameter F (V of each well section according to the method for above-mentioned S402m), will be every
The yield assessment parameter F (V of individual well sectionm) be compared with predetermined threshold value (such as 1), as the F (V of the well sectionm) more than or equal to default
During threshold value, the payzone position that the well section is oil well is determined, as the F (V of the well sectionm) less than predetermined threshold value when, determine that the well section is
The non-payzone of oil well.
Fig. 4 a are Tarim Basin somewhere KLXX well 3710-3800 rice well log interpretation result maps.As shown in fig. 4 a, its
In, first is depth indexing, and second is hole diameter, magnetic orientation, completion gamma and production gamma curve, and the 3rd road is water holding
Rate, the temperature difference, pressure and temperature curve, the 4th road is the density and radiation density curve of calculation of pressure, and the 5th road is F (Vm) bent
Line, the 6th road is gas production, relative gas production and aerogenesis intensity table, and the 7th road is tubular column structure, and the 8th road is explanation conclusion.By
Shown in Fig. 4 a, at the 15th layer, its F (Vm) fluctuate greatly, change is obvious, more than predetermined threshold value (such as 1), you can determine that the 15th layer is
Payzone position.
Alternatively, the method for the present embodiment can be with according to smoothing formula
To above-mentioned F (Vm) curve be smoothed, obtain smooth F (Vm) curve, by smooth F (Vm) curve amplitude with it is pre-
If threshold value is compared, and then can more accurately determine the position of payzone.Y in above formula0For mean value, remaining is adjacent
Value.In the present embodiment, preferred depth-logger is at intervals of 0.025 meter, and interval is little, therefore the density value bounce that pressure gauge is calculated
Greatly, substantial amounts of burr is shown as on curve, so adopting 21 point Linear smoothing formulas in smooth.
The acquisition methods of the oil well flow velocity that the present invention is provided, by obtaining the friction between the tubing string of each well section and fluid
The flow velocity of coefficient, the diameter of the tubing string of each well section and each well section, determines the yield assessment parameter of each well section, then, sentences
Whether the yield assessment parameter of each well section of breaking is more than or equal to predetermined threshold value, and if so, then the well section is the payzone position of oil well.
One of ordinary skill in the art will appreciate that：Realizing all or part of step of above-mentioned each method embodiment can lead to
Cross the related hardware of programmed instruction to complete.Aforesaid program can be stored in a computer read/write memory medium.The journey
Sequence upon execution, performs the step of including above-mentioned each method embodiment；And aforesaid storage medium includes：ROM, RAM, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
The structural representation of the acquisition device embodiment one of the oil well flow velocity that Fig. 5 is provided for the present invention.The oil of the present embodiment
The acquisition device 100 of well stream speed can be with integrated within a processor, or individually processor.As shown in figure 5, the present embodiment
Acquisition device 100 include：
Acquisition module 10, for the pressure differential and the density of fluid of fluid in the well section for obtaining the oil well；Wherein, it is described
Pressure differential is the difference of the Fluid pressure at the well section two ends；
Computing module 20, for according to the density of the pressure differential of the fluid and the fluid, determining the stream of the oil well
Speed.
The device of the present embodiment, can be used for performing the technical scheme of shown embodiment of the method, and it realizes principle and technology
Effect is similar to, and here is omitted.
In a kind of feasible implementation of the present invention, above-mentioned computing module 20, specifically for obtaining the well section
The diameter of the tubing string of coefficient of friction and the well section between length, the tubing string of the well section and the fluid；And according to institute
State the pressure differential of the fluid of well section, the density of the fluid of the well section, the length of the well section, the tubing string of the well section with it is described
The diameter of the tubing string of coefficient of friction and the well section between fluid, determines the flow velocity of the oil well.
Alternatively, above-mentioned computing module 20, specifically for according to formula：Calculate the oil well
Flow velocity：
Wherein, the vmFor the flow velocity of the oil well, the length of well section described in the dz, the dp is the stream of the well section
The pressure differential of body, the ρrFor the density of the fluid of the well section, the fmBetween tubing string and the fluid for the well section
Coefficient of friction, the D is the diameter of the tubing string of the well section, and the g is acceleration of gravity.
Further, above-mentioned acquisition module 10, also particularly useful for the pressure differential for obtaining fluid in described each well section of oil well
With the density of fluid.
Then, above-mentioned computing module 20, is additionally operable to according to formula：The stream of each well section
The pressure differential of body, the density of the fluid of each well section, the length of each well section, the tubing string of each well section and institute
The diameter of coefficient of friction between fluid and the tubing string of each well section is stated, the flow velocity of each well section is determined；And root
According to the flow velocity of well section each described, the flow velocity of the oil well is determined.
The device of the present embodiment, can be used for performing the technical scheme of shown embodiment of the method, and it realizes principle and technology
Effect is similar to, and here is omitted.
The structural representation of the acquisition device embodiment two of the oil well flow velocity that Fig. 6 is provided for the present invention.In above-described embodiment
On the basis of, the acquisition device 100 of the present embodiment also includes judge module 30.
Above-mentioned judge module 30, for according to the flow velocity of each well section, determining the payzone position of the oil well.
Further, above-mentioned judge module 30, specifically for rubbing between the tubing string and fluid according to each well section
The flow velocity of coefficient, the diameter of the tubing string of each well section and each well section is wiped, the yield for determining each well section is commented
Estimate parameter；And judge the yield assessment parameter of each well section whether more than predetermined threshold value；If, it is determined that the well section is
The payzone position of the oil well.
Alternatively, above-mentioned judge module 30, specifically for according to formulaDetermine each well section
Yield assessment parameter F (Vm)。
Alternatively, above-mentioned acquisition module 10, also particularly useful for the density for measuring the radioactive density meter in the well section
It is worth the density of the fluid as the well section.
The device of the present embodiment, can be used for performing the technical scheme of shown embodiment of the method, and it realizes principle and technology
Effect is similar to, and here is omitted.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of acquisition methods of oil well flow velocity, it is characterised in that the oil well includes multiple well sections, methods described includes：
Obtain the density of the pressure differential of fluid and fluid in the well section of the oil well；Wherein, the pressure differential is the well section two
The difference of the Fluid pressure at end；
According to the pressure differential and the density of the fluid of the fluid, the flow velocity of the oil well is determined.
2. method according to claim 1, it is characterised in that the pressure differential according to the fluid and the fluid
Density, determines the flow velocity of the oil well, specifically includes：
Obtain length, the coefficient of friction between the tubing string of the well section and the fluid and the well section of the well section
The diameter of tubing string；
Pressure differential, the density of the fluid of the well section, the length of the well section, the well section according to the fluid of the well section
The diameter of the tubing string of coefficient of friction and the well section between tubing string and the fluid, determines the flow velocity of the oil well.
3. method according to claim 2, it is characterised in that the pressure differential of the fluid according to the well section, described
Coefficient of friction, Yi Jisuo between the density of the fluid of well section, the length of the well section, the tubing string of the well section and the fluid
The diameter of the tubing string of well section is stated, the flow velocity of the oil well is determined, is specifically included：
According to formula：Calculate the flow velocity of the oil well：Wherein, the vmFor the flow velocity of the oil well,
The length of well section described in the dz, the dp is the pressure differential of the fluid of the well section, the ρrFor the fluid of the well section
Density, the fmThe coefficient of friction between tubing string and the fluid for the well section, the D is the straight of the tubing string of the well section
Footpath, the g is acceleration of gravity.
4. method according to claim 3, it is characterised in that obtain in the well section of the oil well pressure differential of fluid and close
Angle value, specifically includes：
Obtain the pressure differential and the density of fluid of fluid in the oil well each well section；
Then, it is described according to formula：The flow velocity of the oil well is calculated, is specifically included：
According to formula：The fluid of the pressure differential of the fluid of each well section, each well section
Density, the coefficient of friction between the length of each well section, the tubing string of each well section and the fluid and each
The diameter of the tubing string of the well section, determines the flow velocity of each well section；
According to the flow velocity of each well section, the flow velocity of the oil well is determined.
5. method according to claim 4, it is characterised in that methods described also includes：
According to the flow velocity of each well section, the payzone position of the oil well is determined.
6. method according to claim 5, it is characterised in that the flow velocity according to each well section, it is determined that described
The payzone position of oil well, specifically includes：
According to the coefficient of friction between the tubing string and fluid of each well section, the diameter of the tubing string of each well section and each
The flow velocity of the well section, determines the yield assessment parameter of each well section；
Judge the yield assessment parameter of each well section whether more than predetermined threshold value；
If, it is determined that the well section is the payzone position of the oil well.
7. method according to claim 6, it is characterised in that between the tubing string and fluid according to each well section
Coefficient of friction, the diameter of the tubing string of each well section and each well section flow velocity, determine the product of each well section
Amount assessment parameter, specifically includes：
According to formulaDetermine the yield assessment parameter F (V of each well sectionm)。
8. the method according to any one of claim 1-7, it is characterised in that obtain the close of fluid in the well section of the oil well
Degree, specifically includes：
Density of the density value that radioactive density meter in the well section is measured as the fluid of the well section.
9. a kind of acquisition device of oil well flow velocity, it is characterised in that the oil well includes multiple well sections, described device includes：
Acquisition module, for the pressure differential and the density of fluid of fluid in the well section for obtaining the oil well；Wherein, the pressure differential
For the difference of the Fluid pressure at the well section two ends；
Computing module, for according to the density of the pressure differential of the fluid and the fluid, determining the flow velocity of the oil well.
10. device according to claim 9, it is characterised in that the computing module, specifically for obtaining the well section
The diameter of the tubing string of coefficient of friction and the well section between length, the tubing string of the well section and the fluid；And according to institute
State the pressure differential of the fluid of well section, the density of the fluid of the well section, the length of the well section, the tubing string of the well section with it is described
The diameter of the tubing string of coefficient of friction and the well section between fluid, determines the flow velocity of the oil well.
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| CN109669051A (en) * | 2019-02-21 | 2019-04-23 | 宋成立 | It is a kind of for detecting the pipeline road of oil well Extraction rate |
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