CN109209339A - Method and device for determining probe lateral force of coupling detection device for operation under pressure - Google Patents
Method and device for determining probe lateral force of coupling detection device for operation under pressure Download PDFInfo
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- CN109209339A CN109209339A CN201811175435.4A CN201811175435A CN109209339A CN 109209339 A CN109209339 A CN 109209339A CN 201811175435 A CN201811175435 A CN 201811175435A CN 109209339 A CN109209339 A CN 109209339A
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- tubing string
- oil pipe
- oil
- force
- probe
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/09—Locating or determining the position of objects in boreholes or wells, e.g. the position of an extending arm; Identifying the free or blocked portions of pipes
Abstract
The invention discloses a method and a device for determining the lateral pressure of a probe of a coupling detection device in operation under pressure, which comprises the following steps: 1) the method comprises the following steps of (1) determining structural parameters of an oil-gas well pipe column operated under pressure, formation pressure of the oil-gas well and other parameters; 2) according to the correlation theories of the stability of the pressure lever, the pendulum force and the like, deducing and establishing an oil pipe lateral force calculation mathematical model under different working conditions. And analyzing and determining the contact force of the probe and the oil pipe, and determining mechanical parameters and boundary conditions. 3) And calculating and analyzing the lateral force of the probe of the coupling detection device according to the established mathematical model of the uplifting deviation and the lateral force of the pressed pipe column, and analyzing and determining the optimal contact force of the probe and the oil pipe. According to the invention, through calculation and analysis of the lateral force of the probe of the coupling detection device in the pressurized operation, the optimal contact force between the probe and the oil pipe is determined, the abrasion of the probe and the oil pipe is effectively controlled, the service life is prolonged, and meanwhile, the detection accuracy of the coupling detection device is favorably improved.
Description
Technical field
The invention belongs to oil field operation technical fields, and in particular to one kind is for Operating Pressure collar detecting device probe side
To the determination method and device of power.
Background technique
Operating Pressure refers to using special workover rig, in the case where oil, gas and water well wellheadpressure, has implemented down tube
Column, pit shaft are repaired and the underground work technology of well stimulation.Oil jacket annulus pressure, blanking plug control oil are controlled by preventer group
Then pipe internal pressure overcomes upper top power in well by applying external force to tubing string, to complete with pressure lower tubular column.
The oil of nearly all well, gas and water layer from exploration, develop into the maintenance process in later period all by different degrees of wound
Evil.Reservoir damage how is avoided or reduced, the oil-water well service life is improved and production capacity is always the direction that development technique personnel make great efforts.
The appearance of Operating Pressure technology provides possibility for the reservoir protection of realization truly.
For oil well, the more traditional underground work of Operating Pressure is invaded without outside fluid, and oil-gas Layer is just without outer
Carry out solid phase, the injury of liquid phase will not generate new interlayer contradiction, and formation pressure system not will receive destruction, not need to build again
Vertical balance is conducive to stable and high yields after oil well is repaired.Relative to traditional water well operation, in the case where not open flow not draining overflow
Operating Pressure does not need release for individual well, while solving the problems, such as sewage discharge, reduces water filling cost；Entire note is adopted
It for net, is benefited well to periphery, water-injection station injection work does not influence, and entire note is kept to adopt network formation pressure system not by broken
It is bad, it does not need to build pressure balance again, is conducive to improve water filling actual effect.
Current technology and equipment with pressure is external highly developed, assist type and self contained facility and its supporting tool sequence
Complete, equipment realizes all-hydraulic lifting.With each oil field to the great attention of oil layer protection and Operating Pressure technology gradually
Perfect, this technology is developed rapidly at home after 2000.
Tubing coupling detecting devices judges tubing coupling position during oil pipe removes, and prevents the sealing rubber of preventer
Glue part is collided with, and causing Operating Pressure, there are security risks.The accurately detecting of tubing coupling detecting devices, not only can to avoid rise
Rubber core of lubricator and tubing coupling are collided with during lower tubing coupling, are improved the service life of preventer packing unit, are mentioned
High operating efficiency with pressure.However, for probe contacts to tubing string, contact force is excessive easily to cause probe and oil pipe in box cupling detecting devices
The abrasion of column；Contact force is too small, and the vibration in oil pipe tripping operation may be that probe deviates tubing string, leads to the accuracy of detection
It reduces.
Summary of the invention
Goal of the invention: the present invention determines probe by calculating analysis to Operating Pressure collar detecting device probe lateral force
With the optimum contact power of oil pipe, the effectively abrasion of control probe and oil pipe, improve service life, while being conducive to collar detecting device
Detection accuracy improve.
Summary of the invention: the present invention provides a kind of determination method for Operating Pressure collar detecting device probe lateral force,
The following steps are included:
Step 100: clear Operating Pressure oil/gas well tubular column structure parameter and operation oil/gas well strata pressure parameter；The oil
Gas well tubular column structure parameter include: tubing length, distance at well head, oil pipe outer diameter, pipe aperture, Poisson's ratio, oil pipe line density,
Elasticity modulus, thermal expansion coefficient, geothermal gradient, fluid density in oil pipe；It is laminated with obtaining oil/gas well by consulting record
Force parameter, i.e. borehole pressure；
Step 200: probe Analysis of Side Force
When tubing string deviates well head center, lateral force R=tg φ Q；
Wherein, tg Φ=δ/L, δ are jack up unit and well head off-centring distance both hook deviations, L be jack up unit and
Oil pipe end distance；Q oil pipe axial load, Q=pg+pf+pd+p'g-psd, PgFor weight of the tubing string in well in liquid, PfFor pipe
When column removes and the frictional resistance of the borehole wall, PdFor dynamic loading, p'gThe weight of junk and certain downhole tools when for fishing
Deblocking and release pulling force, PsdFor upper top power；
When tubing string compressive deformation, lateral force R is acquired by following formula
Wherein, p is oil pipe axial load, P=p'g-pg-pf-pd+psd；K passes throughIt obtains, wherein, E is elasticity
Modulus；H is contact point to equilbrium position distance.
Preferably, further include the steps that tubing string force analysis:
The axial load that tubing string is born is maximum are as follows: p=afqsL+p'g-psd；
Wherein, a is the resistance coefficient for considering frictional force and dynamic loading formula, and a=1.2 to 1.6 takes a=1 when removing not deep；
F=1-r1/r2；
F is buoyancy coefficient；
γ1For the density of liquid in well, units/kg/m3；
γsFor the density of tubing string material, units/kg/m3；
qsFor the aerial weight of unit length tubing string, unit N/m；
L is length of the tubing string on ground, unit m.
Invention further provides a kind of determining device for Operating Pressure collar detecting device probe lateral force, packets
It includes with lower module:
Parameter input module: for inputting Operating Pressure oil/gas well tubular column structure parameter and operation oil/gas well strata pressure ginseng
Number；
The oil/gas well tubular column structure parameter includes: tubing length, distance, oil pipe outer diameter, pipe aperture, Poisson at well head
Than, fluid density in oil pipe line density, elasticity modulus, thermal expansion coefficient, geothermal gradient, oil pipe；It is obtained by consulting record
Take oil/gas well strata pressure parameter, i.e. borehole pressure；
Probe Analysis of Side Force module:
When tubing string deviates well head center, lateral force R=tg φ Q；
Wherein, tg Φ=δ/L, δ are jack up unit and well head off-centring distance both hook deviations, L be jack up unit and
Oil pipe end distance；Q oil pipe axial load, Q=pg+pf+pd+p'g-psd, PgFor weight of the tubing string in well in liquid, PfFor pipe
When column removes and the frictional resistance of the borehole wall, PdFor dynamic loading, p'gThe weight of junk and certain downhole tools when for fishing
Deblocking and release pulling force, PsdFor upper top power；
When tubing string compressive deformation, lateral force R is acquired by following formula
Wherein, p is oil pipe axial load, P=p'g-pg-pf-pd+psd；K passes throughIt obtains, wherein, E is elasticity
Modulus；H is contact point to equilbrium position distance.
Preferably, further include tubing string force analysis module:
The axial load that tubing string is born is maximum are as follows: p=afqsL+p'g-psd；
Wherein, a is the resistance coefficient for considering frictional force and dynamic loading formula, and a=1.2 to 1.6 takes a=1 when removing not deep；
F=1-r1/r2；
F is buoyancy coefficient；
γ1For the density of liquid in well, units/kg/m3；
γsFor the density of tubing string material, units/kg/m3；
qsFor the aerial weight of unit length tubing string, unit N/m；
L is length of the tubing string on ground, unit m.
The present invention has the effect that according to offset and pipe compression lateral force mathematical model is above proposed, and can quickly analyze really
Determine collar detecting device probe lateral force, and other relevant design parameters of preferred detection device accordingly, provides base for device design
Plinth foundation.In addition, abrasion of the present invention conducive to control probe and oil pipe, improves detection device probe service life, is conducive to simultaneously
Improve the detection accuracy of collar detecting device.
Detailed description of the invention
Fig. 1 is that oil pipe above proposes drift condition force analysis explanatory diagram.
Fig. 2 is tubing string compression situation force analysis explanatory diagram.
Specific embodiment
Have choosing below technical solution of the present invention to be further described embodiment.
The method of the present invention the following steps are included:
1) parameters such as clear Operating Pressure oil/gas well tubular column structure parameter and operation oil/gas well strata pressure；
2) according to correlation theories such as pressure bar stabilization and pendulum forces, derivation establishes oil pipe lateral force under different operating conditions and calculates mathematics
Model.Analysis determines the contact force of probe and oil pipe, specifies mechanics parameter and boundary condition.
3) offset and the calculating analysis collar detecting device spy of tubing string compression lateral force mathematical model are above proposed according to what is established
Head lateral force, analyzes the optimum contact power for determining probe and oil pipe.
Embodiment:
1. the force analysis of tubing string
What tubing string was primarily subjected to is axial load.It specifically includes that weight P of the tubing string in well in liquidg, tubing string rise
When lower and the frictional resistance P of the borehole wallfWith dynamic loading Pd, fishing when junk weight and certain downhole tools deblocking and release
Put pulling force p'g, upper top power PsdDeng.Therefore the axial load of tubing string are as follows:
P=pg±pf±pd±pg±psd (1)
The frictional resistance P when upper lifting pipe postfWith dynamic loading PdTake "+", PsdTake "-", when decentralization takes PfWith dynamic loading PdIt takes
“-”、PsdTake "+".The frictional resistance P of tubing string and the borehole wallfWith the liquid in hole deviation and azimuthal size and variation, well temperature, well
Gap size between performance, tubing string and the borehole wall is related.Generally take:
pf=(0.2+0.3) pg, psd=pWell pressure×ATubing string section (2)
When upper lifting pipe post, due to frictional resistance PfWith dynamic loading Pd"+" is all taken, so this when, tubing string was born
Axial load is maximum, are as follows:
P=pg+pf+pd+p'g-psd=(1.2-1.6) pg+p'g-psd=apg+p'g=afqsL+p'g-psd (3)
In formula: a-consideration frictional force and dynamic loading formula resistance coefficient, a=1.2~1.6, desirable a when removing less deep
=1；
F=1-r1/r2 (4)
F-buoyancy coefficient；
γ1The density of liquid, kg/m in-well3；
γsThe density of-tubing string material, kg/m3；
qsThe aerial weight of-unit length tubing string, N/m；
Length of the L-tubing string on ground, m.
Formula (3) shows a certain specification oil pipe with the increase of depth of setting L, and the axial load of tubing string is bigger, operating conditions
Different with the task of burden, the axial load of tubing string is also just different.
2. the calculating for lateral force of popping one's head in
There are two types of situations in well head position generation positional shift for oil pipe:
1) tubing string deviates well head center
When Operating Pressure, it is as shown in Figure 1 to simplify stress condition for jack up unit itself and well head center deviation.
A. the calculating of lateral force
AB sections of moments of flexure are
M=Fsin φ (m-x) (5)
The differential equation of rich curve is
EIy "=M=Fsin φ (m-x) (6)
It integrates
In fixing end B, corner and amount of deflection are 0, i.e.,
As x=0,
y'B=θ=0 (9)
yB=0 (10)
Boundary condition (9), (10) formula are brought into (7), (8) formula obtains
θ=0 C=EI
D=EIyB=0
Gained integral constant C and D are taken back into (7), (8) formula again, equations of rotating angle is obtained and deflection curve equation is respectively
Above two formula is brought into the abscissa x=m of section A, and the corner and amount of deflection for obtaining section B are respectively
θAIt is positive, indicates counterclockwise when the corner of section B.yABeing positive indicates that the amount of deflection of B point is upward.
According to static balance condition ∑ Fy=0, ∑ Fx=0
Fsin φ+R=0 (14)
Fcos φ-Q=0 (15)
Simultaneous:
Q oil pipe axial load in formula, the Q=p under such operating conditiong+pf+pd+p'g-psd
B. application example
Oil pipe fundamental performance parameter are as follows: tubing length l=1000m, distance m=2m, oil pipe outer diameter D at well head=
0.073m, borehole pressure 5MPa, pipe aperture d=0.062m, Poisson's ratio μ=0.3, oil pipeline density p=9.67kg/m, elasticity
Modulus E=2.1 × 105MPa, thermalexpansioncoefficientα=1.25 × 10-51/ DEG C, gravity acceleration g=9.8m/s2, geothermal gradient T
=0.03 DEG C/m, fluid density ρ in oil pipe0=1 × 103kg/m3。
Oil pipe section inertia is calculated away from I=π (D4-d4)/64；It calculates
I=6.683 × 10-7m4
Oil pipe fundamental performance parameter is substituted into formula (3) and calculates oil pipe axial load
Q=(0.937 × 105N~1.316 × 105N)
Oil pipe fundamental performance parameter is substituted into formula (15) to obtain
It is related with jack up unit initial angle to calculate lateral force parameter, according to on-site actual situations tg Φ=δ/L, δ is
Rising device and well head off-centring distance, both hook deviation, L are jack up unit and oil pipe end distance, tg Φ range (0-0.01)
Substitution is computed to obtain support force
R=(0~1316) N
2) tubing string compressive deformation
When Operating Pressure declines tubing string, oil pipe compressive deformation itself is reduced to pressure bar stabilization stress condition such as Fig. 2 institute
Show.
A. the calculating of lateral force
Compression oil pipe deflection curve equation is established in segmentation
M(x2)=p (δ-y2) (17)
Deflection curve equation under the micro-bend balance of compression rod is
It enablesIt can turn to
y”2+k2y2=k2δ (19)
Its general solution is
y2=Asinkx2+Bcoskx2+δ (20)
y'2=Akcoskx2-Bksinkx2 (21)
BC sections of Bending Moment Equations are
M(x1)=p (δ-y1)-R(h-x1) (22)
It enablesIt can turn to
Its general solution is
It brings boundary condition into and determines constant A, B, C, D, work as x1When=0, there is y1=y1'=0 solves
So having
Work as x1=x2When=h.Kh=θ is enabled, then
Work as x2When=h, y2=0, then
+ δ=0 θ+Bcos θ Asin (32)
Boundary condition is substituted into obtain
Work as x1=x2When=h, y1'=y2′
Work as x2When=l, y2=δ, then A sin kl+Bcoskl+ δ=δ (35)
Kl=φ is enabled, then
φ=0 sin φ+Bcos A (36)
It arranges
Abbreviation obtains
P oil pipe axial load in formula, under such operating condition
P=p'g-pg-pf-pd+psd
It willKh=θ is substituted into
B. application example
Oil pipe fundamental performance parameter are as follows: tubing length l=1000m, distance m=2m, h=1.5m at well head, oil pipe outer diameter D
=0.073m, borehole pressure 5MPa, pipe aperture d=0.062m, Poisson's ratio μ=0.3, oil pipeline density p=9.67kg/m, bullet
Property modulus E=2.1 × 105MPa, thermalexpansioncoefficientα=1.25 × 10-51/ DEG C, gravity acceleration g=9.8m/s2, geothermal gradient
T=0.03 DEG C/m, fluid density ρ in oil pipe0=1 × 103kg/m3。
Oil pipe section inertia is calculated away from I=π (D4-d4)/64 calculate to obtain I=6.683 × 10-7m4
Calculate (0-1.055 × 10 oil pipe axial load p=5N maximum plant p=1.055 × 10) are taken5N brings performance parameter into
Formula (39)
R=-0.16 × 105δ
Negative sign indicates lateral force direction and top offset direction on the contrary, top offset displacement range δ=(0~0.05) generation
Enter, numerical value be computed lateral force is
R=(0~800) N.
The above embodiments are only used to illustrate the present invention, and the simultaneously limitation of non-present invention, the common skill in relation to technical field
Art personnel can make variation and deformation, therefore all equivalent skills without departing from the spirit and scope of the present invention
Art scheme also belongs to scope of the invention.
Claims (4)
1. a kind of determination method for Operating Pressure collar detecting device probe lateral force, comprising the following steps:
Step 100: clear Operating Pressure oil/gas well tubular column structure parameter and operation oil/gas well strata pressure parameter；The oil/gas well
Tubular column structure parameter includes: tubing length, distance, oil pipe outer diameter, pipe aperture, Poisson's ratio, oil pipe line density, elasticity at well head
Modulus, thermal expansion coefficient, geothermal gradient, fluid density in oil pipe；Oil/gas well strata pressure ginseng is obtained by consulting record
Number, i.e. borehole pressure；
Step 200: probe Analysis of Side Force
When tubing string deviates well head center, lateral force R=tg φ Q；
Wherein, tg Φ=δ/L, δ are that both hook deviation, L are jack up unit and oil pipe for jack up unit and well head off-centring distance
Threshold value；Q oil pipe axial load, Q=pg+pf+pd+p'g-psd, PgFor weight of the tubing string in well in liquid, PfIt is risen for tubing string
When lower and the frictional resistance of the borehole wall, PdFor dynamic loading, p'gThe weight of junk and the deblocking of certain downhole tools when for fishing
With release pulling force, PsdFor upper top power；
When tubing string compressive deformation, lateral force R is acquired by following formula
Wherein, p is oil pipe axial load, P=p'g-pg-pf-pd+psd；K passes throughIt obtains, wherein, E is elasticity modulus；h
For contact point to equilbrium position distance.
2. the determination method according to claim 1 for Operating Pressure collar detecting device probe lateral force, feature
It is, further includes the steps that tubing string force analysis:
The axial load that tubing string is born is maximum are as follows: p=afqsL+p'g-psd；
Wherein, a is the resistance coefficient for considering frictional force and dynamic loading formula, and a=1.2 to 1.6 takes a=1 when removing not deep；
F=1-r1/r2；
F is buoyancy coefficient；
γ1For the density of liquid in well, units/kg/m3；
γsFor the density of tubing string material, units/kg/m3；
qsFor the aerial weight of unit length tubing string, unit N/m；
L is length of the tubing string on ground, unit m.
3. a kind of determining device for Operating Pressure collar detecting device probe lateral force, which is characterized in that described device packet
It includes with lower module:
Parameter input module: for inputting Operating Pressure oil/gas well tubular column structure parameter and operation oil/gas well strata pressure parameter；
The oil/gas well tubular column structure parameter include: tubing length, distance at well head, oil pipe outer diameter, pipe aperture, Poisson's ratio,
Oil pipe line density, elasticity modulus, thermal expansion coefficient, geothermal gradient, fluid density in oil pipe；Oil is obtained by consulting record
Gas well strata pressure parameter, i.e. borehole pressure；
Probe Analysis of Side Force module:
When tubing string deviates well head center, lateral force R=tg φ Q；
Wherein, tg Φ=δ/L, δ are that both hook deviation, L are jack up unit and oil pipe for jack up unit and well head off-centring distance
Threshold value；Q oil pipe axial load, Q=pg+pf+pd+p'g-psd, PgFor weight of the tubing string in well in liquid, PfIt is risen for tubing string
When lower and the frictional resistance of the borehole wall, PdFor dynamic loading, p'gThe weight of junk and the deblocking of certain downhole tools when for fishing
With release pulling force, PsdFor upper top power；
When tubing string compressive deformation, lateral force R is acquired by following formula
Wherein, p is oil pipe axial load, P=p'g-pg-pf-pd+psd；K passes throughIt obtains, wherein, E is elasticity modulus；h
For contact point to equilbrium position distance.
4. the determining device according to claim 3 for Operating Pressure collar detecting device probe lateral force, feature
It is, further includes tubing string force analysis module:
The axial load that tubing string is born is maximum are as follows: p=afqsL+p'g-psd；
Wherein, a is the resistance coefficient for considering frictional force and dynamic loading formula, and a=1.2 to 1.6 takes a=1 when removing not deep；
F=1-r1/r2；
F is buoyancy coefficient；
γ1For the density of liquid in well, units/kg/m3；
γsFor the density of tubing string material, units/kg/m3；
qsFor the aerial weight of unit length tubing string, unit N/m；
L is length of the tubing string on ground, unit m.
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