CN104111203A - Bauschinger effect evaluation method of sleeve tube used for thickened oil steam huff-and-puff thermal production well - Google Patents
Bauschinger effect evaluation method of sleeve tube used for thickened oil steam huff-and-puff thermal production well Download PDFInfo
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Abstract
The invention discloses a bauschinger effect evaluation method of a sleeve tube used for a thickened oil steam huff-and-puff thermal production well and belongs to the field of petroleum and gas extraction. The method includes following steps: S1: measuring an initial yield strength [sigma]0 and a tensile strength [sigma]t of a to-be-evaluated sleeve tube material; S2: obtaining a sleeve tube sample, carrying out multiple symmetrically pull-push cyclic test to obtain yield strengths [sigma]1, [sigma]2, [sigma]3, etc. of every stretching stages; S3: calculating increments [delta][sigma]1, [delta][sigma]2, [delta][sigma]3, etc. of the yield strengths after every pull-push cyclic tests and defining an average value of the increments of the yield strengths as [delta][sigma]; S4: predicting a total increment [delta][sigma]T of the yield strengths within a service life of the sleeve tube according to a formula [delta][sigma]T=A*B*[delta][sigma]; S5: determining the to-be-evaluated sleeve tube material to be qualified if [delta][sigma] is a positive value and a formula [delta][sigma]T<=[sigma]t-[sigma]0 is true, otherwise determining the to-be-evaluated sleeve tube material to be unqualified, or determining the to-be-evaluated sleeve tube material to be qualified if [delta][sigma] is a negative value and a formula [sigma]0+[delta][sigma]T>=[sigma]c is true, otherwise determining the to-be-evaluated sleeve tube material to be unqualified. By means of measurement and calculation of the average value [delta][sigma] of the increments of the yield strengths, it can be determined that whether the to-be-evaluated sleeve tube material belongs to cyclic softening or cyclic hardening, and further it can be determined that whether the to-be-evaluated sleeve tube material is qualified or not.
Description
Technical field
The present invention relates to oil and gas exploitation field, particularly the Bauschinger effect evaluating method of sleeve pipe for a kind of thickened oil steam-stimulated thermal recovery well.
Background technology
Bauschinger effect is a small amount of plastic yield of the metal material pre-loaded generation of process, after unloading, loads in the same way again, and regulation unrelieved stress increases; Oppositely load the phenomenon that regulation unrelieved stress reduces.Bauschinger effect and the metal material Dislocations suffered change in resistance of moving is relevant.Viscous crude is one of main both at home and abroad hydrocarbon resources type, and domestic to take Xinjiang, the Liaohe River, Shengli Oil Field be main heavy crude producing.The most important technology of thickened oil recovery is exactly steam stimulation operation, constraint due to stratum and cement mantle, compression and tensile load are born respectively in sleeve pipe rising and reduction with temperature in circulation steam treatment process, the yield strength of shell material is along with circulation is drawn-presses variation and continues to change, show as cyclic hardening or softening, the yield strength that is material raises and reduces, and this phenomenon is Bauschinger effect namely.
It is that Bauschinger effect is on active service and is had material impact the safety of sleeve pipe that yield strength under draw-compressive load of this circulation changes.When the Bauschinger effect of shell material shows as cyclic hardening, along with cycle index increases, the yield strength of material likely reaches its tensile strength and causes fracture; When the Bauschinger effect of shell material shows as cyclic softening, along with cycle index increases, the yield strength of material is likely reduced to below a certain critical value, and this critical value is that thermal recovery well is normally produced, resisted terrestrial stress, maintains the stable SMYS of pit shaft.When the yield strength of material is during lower than this critical value, pit shaft, by unstability, causes well damage, even scraps.
Current, it is only to measure respectively the yield strength of shell material under room temperature and high temperature by the evaluation method of sleeve pipe that steam thermal recovery of heavy oil field is adopted to well, and relate to, do not draw-press the circulation evaluation of material yield Strength Changes down, the safety of thermal recovery well is on active service and is formed significant negative effect, therefore, be necessary, for thermal recovery well steam stimulation cycle specificity, to set up the Bauschinger effect evaluation method of shell material, improve the safe reliability of thermal recovery well pit shaft.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides the Bauschinger effect evaluating method of a kind of thickened oil steam-stimulated thermal recovery well with sleeve pipe.Described technical scheme is as follows:
The Bauschinger effect evaluating method of a kind of thickened oil steam-stimulated thermal recovery well with sleeve pipe is provided, and described evaluating method comprises the following steps:
S1, records by the σ of yield strength at the beginning of evaluation and test shell material
0and tensile strength sigma
t;
S2 is got sleeve pipe sample in evaluation and test shell material in step S1, and described sleeve pipe sample repeatedly draw-is pressed to symmetrical cycle test, records the yield strength σ of each draw stage
1, σ
2, σ
3,
S3, calculates each circulation in step S2 and draws-press the increment Delta σ of rear yield strength
1, Δ σ
2, Δ σ
3..., wherein, Δ σ
n=σ
n-σ
n-1(n=1,2,3 ...), the mean value that defines each yield strength increment is Δ σ;
S4, according to yield strength total increment Δ σ in formula (1) prediction sleeve pipe service life
t:
Δσ
T＝A×B×Δσ （1）
In formula, A is the sleeve design life-span, and unit is year; B is the annual steam injection round of the sleeve pipe upper limit, and unit is times/year;
S5, if Δ σ be on the occasion of, and formula (2) sets up, measured sleeve tube material is qualified, otherwise defective,
Δσ
T≤σ
t-σ
0 （2）；
If Δ σ is negative value, and formula (3) establishment, measured sleeve tube material is qualified, otherwise defective,
σ
0+Δσ
T≥σ
c （3），
In formula (3), σ
csMYS for shell material.
Further, described in step S1, by evaluation and test shell material, be pole sample, gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is greater than or equal to 5 times of diameters.
Further, in step S1, obtain the described σ of yield strength at the beginning that is evaluated and tested shell material
0and tensile strength sigma
ttime, the method for employing uniaxial tension, rate of extension is less than or equal to 0.5mm/min.
Further, in step S2, described sleeve pipe sample is carried out drawing-pressing for 5 times symmetrical cycle test, record the yield strength σ of these 5 draw stage
1, σ
2, σ
3, σ
4, σ
5.
Further, in step S2, the sample that draws-press for 5 times symmetrical cycle test to use is same sample.
Further, the sample of sleeve pipe described in step S2 is pole sample, and gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is 3～5 times of described sleeve pipe specimen finish.
Further, while drawing-pressing symmetrical cycle test described in carrying out, rate of extension is less than or equal to 0.25mm/min.
Further, in step S3, the mean value of each yield strength increment be Δ σ on the occasion of time, by evaluation and test shell material, belonged to cyclic hardening; When Δ σ is negative value, by evaluation and test shell material, belonged to cyclic softening.
Further, in step S5 formula (3), the SMYS σ of shell material
cfor design load, according to 85% of casing grade name lower limit of yield, calculate.
Further, in step S2, described sleeve pipe sample is carried out drawing-pressing for 6,8 or 9 times symmetrical cycle test.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By the mean value Δ σ of measurements and calculations yield strength increment, and judge by the positive and negative of this mean value Δ σ that intuitively being evaluated and tested shell material belongs to cyclic softening or cyclic hardening, further judge that whether this measured sleeve tube material is qualified, like this, can put thickened oil steam-stimulated thermal production well sleeve material within controlled range, hold whether safety of thermal recovery well service life inner sleeve material.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below embodiment of the present invention is described further in detail.
Embodiment mono-
The present embodiment provides the Bauschinger effect evaluating method of a kind of thickened oil steam-stimulated thermal recovery well with sleeve pipe, and this evaluating method comprises the following steps:
S1, records by the σ of yield strength at the beginning of evaluation and test shell material
0and tensile strength sigma
t.Preferably, this is evaluated and tested shell material is pole sample, and gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is greater than or equal to 5 times of diameters.Obtain by the σ of yield strength at the beginning of evaluation and test shell material
0and tensile strength sigma
ttime, the method for employing uniaxial tension, rate of extension is less than or equal to 0.5mm/min.Wherein, yield strength is that afterflow is the stress of 0.2% correspondence at the beginning.
S2 is got sleeve pipe sample in evaluation and test shell material in step S1, and sleeve pipe sample repeatedly draw-is pressed to symmetrical cycle test, records the yield strength σ of each draw stage
1, σ
2, σ
3...Preferably, sleeve pipe sample is carried out drawing-pressing for 5 times symmetrical cycle test, record the yield strength σ of these 5 draw stage
1, σ
2, σ
3, σ
4, σ
5.This sleeve pipe sample is pole sample, and gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is 3～5 times of sleeve pipe specimen finish.While drawing-pressing symmetrical cycle test, rate of extension is less than or equal to 0.25mm/min.Carry out drawing-pressing for 5 times symmetrical cycle test, can reach well on the one hand the object of test, the accuracy of warranty test result, on the other hand, test number (TN) is moderate, does not increase experimentation cost.This repeatedly or to draw-press the sample that symmetrical cycle test is used for 5 times be same sample.Draw-press for 5 times the yield strength of symmetrical cycle test to be the stress that afterflow is 0.2% correspondence, draw-presses the critical strain of symmetrical cycle test definite according to well head steam treatment temperature, steam injecting temperature is not during higher than 300 ℃, and critical strain is ± 2.5%; Steam injecting temperature is greater than 300 ℃ and during not higher than 373 ℃, critical strain is ± 3.5%.If draw-press for 5 times after symmetrical cycle test, sample produces necking down, crackle or ruptures, and directly judges that material is defective, and as after drawing-presses symmetrical cycle to test 5 times, sample is normal, proceeds following test and analysis.As other embodiment, to sleeve pipe sample, also can select to carry out drawing-pressing for 6,8 or 9 times symmetrical cycle test.
S3, calculates each circulation in step S2 and draws-press the increment Delta σ of rear yield strength
1, Δ σ
2, Δ σ
3..., wherein, Δ σ
n=σ
n-σ
n-1(n=1,2,3 ...), the mean value that defines each yield strength increment is Δ σ.The mean value of each yield strength increment be Δ σ on the occasion of time, by evaluation and test shell material, belonged to cyclic hardening; When Δ σ is negative value, by evaluation and test shell material, belonged to cyclic softening.
S4, according to yield strength total increment Δ σ in formula (1) prediction sleeve pipe service life
t:
Δσ
T＝A×B×Δσ （1）
In formula, A is the sleeve design life-span, and unit is year; B is the annual steam injection round of the sleeve pipe upper limit, and unit is times/year.
S5, if Δ σ be on the occasion of, and formula (2) sets up, measured sleeve tube material is qualified, otherwise defective,
Δσ
T≤σ
t-σ
0 （2）；
If Δ σ is negative value, and formula (3) establishment, measured sleeve tube material is qualified, otherwise defective,
σ
0+Δσ
T≥σ
c （3），
In formula (3), σ
cfor the SMYS of shell material, the SMYS σ of shell material
cbelong to design load, according to 85% of casing grade name lower limit of yield, calculate.Be σ
c=σ
s* 85%, σ
sfor casing grade name lower limit of yield, by existing industrial standard, can directly be consulted.
Finally, provide test evaluation report, this test evaluation report comprises three parts: (1) client, trust time, sleeve pipe are manufactured information, intended the information such as applied environment design parameter; (2) process of the test is described, and comprises the pictures such as test, sample of different phase, and the information such as data; (3) evaluation conclusion, comprises that whether shell material is qualified, and the summary description of full distance test situation.
Embodiment bis-
The embodiment of the present invention provides the Bauschinger effect evaluating method of a kind of thickened oil steam-stimulated thermal recovery well with sleeve pipe, and it is evaluation object with three kinds of shell materials that this Bauschinger effect evaluating method be take the thermal recovery well in domestic certain oil field, and specifically evaluation procedure and situation are as follows:
Operating mode:
1) 260 meters of left and right of well depth;
2) Wellhead steam injection temperature is 260～300 ℃;
3) 6 years designed lives;
4) annual steam injection 3～4 rounds;
5) casing grade is N80.
Evaluation procedure:
1) three kinds of shell materials are numbered respectively A, B, C, and uniaxial tension sample (is measured yield strength σ at the beginning
0and tensile strength sigma
tsample) gauge length section diameter 6.5mm, the long 40mm of gauge length, end is M16 screw thread, middle rounding off, roughness R0.75 in gauge length section; Draw-press symmetrical cycle test sample gauge length section diameter 6.5mm, the long 25mm of gauge length, end is M16 screw thread, middle rounding off, roughness R0.75 in gauge length section.
2) uniaxial tensile test result
| Material | Yield strength: MPa | Tensile strength: MPa | Qu Qiang is poor: MPa |
| A | 560 | 674 | 114 |
| B | 570 | 635 | 65 |
| C | 623 | 648 | 25 |
3) draw-press symmetrical cycle test findings
4) evaluation of material
Materials A: belong to cyclic hardening, yield strength total increment is 4.04 * 4 * 6=96.96Mpa, lower than the in the wrong strong poor 114MPa of material, judges that material is qualified.
Material B: belong to cyclic softening, calculate according to formula (3), the prediction yield strength of its left side service life material in latter stage is 455.76MPa; According to N80 grade of steel, calculate, material SMYS is 552 * 0.85=469.2MPa, and formula (3) is false, and judges that material is defective.
Material C: rupture in 5 times are drawn-press symmetrical cycle test, illustrate that this material is not suitable for being on active service under circulation Tensile or Compressive Loading, judge defective.
5) evaluation conclusion
(1) materials A, belongs to cyclic hardening, can meet requirement designed life, qualified.
(2) material B, belongs to cyclic softening, cannot meet requirement designed life, defective.
(3) material C, ruptures in 5 circulation tension and compression test, defective.
6) applicable cases
Materials A, the application of going into the well in oil field for 2010, is on active service all right.
Bauschinger effect evaluation method and the process of thermal production well sleeve material:
1) by uniaxial tensile test, obtain the σ of yield strength at the beginning of shell material
0, tensile strength sigma
t, wherein, yield strength is that afterflow is the stress of 0.2% correspondence at the beginning.Tensile sample is pole sample, and gauge length scope inside surface roughness is not higher than R0.8, and gauge length is not less than 5 times of diameters, and rate of extension is not higher than 0.5mm/min.
2) carry out drawing-pressing for 5 times symmetrical cycle test, determine the yield strength σ of 5 draw stage
1, σ
2, σ
3, σ
4, σ
5, sample is pole sample, gauge length scope inside surface roughness is not higher than R0.8, gauge length is 3～5 times of diameter, circulation tension and compression test is same sample with sample, and yield strength is the stress that afterflow is 0.2% correspondence, draws-press speed not higher than 0.25mm/min.If after 5 circulation tension and compression test, sample produces necking down, crackle or ruptures, and directly judges that material is defective, after 5 circulation tension and compression test, sample is normal, proceeds following test and analysis.
3) calculate 5 circulations and draw-press rear σ
1, σ
2, σ
3, σ
4, σ
5increment, Δ σ
1, Δ σ
2, Δ σ
3, Δ σ
4, Δ σ
5.Wherein, Δ σ
n=σ
n-σ
n-1(n=1,2 ... 5).Then, get the mean value Δ σ of 5 yield strength increments.If Δ σ, for just, judges that shell material belongs to cyclic hardening; Otherwise, be cyclic softening.
4) according to yield strength total increment Δ σ in formula (1) prediction sleeve pipe service life
t:
Δσ
T＝A×B×Δσ （1）
Wherein A is thermal recovery well designed life, and unit is year; B is the annual steam injection round of the thermal recovery well upper limit, and unit is times/year.Then according to cyclic hardening and cyclic softening, evaluate respectively.
5) if shell material belongs to cyclic hardening, according to formula (2), evaluate, meet formula (2), material is qualified, otherwise, for defective.
Δσ
T≤σ
t-σ
0 （2）
(the σ on formula (2) right side
t-σ
0) represent the difference between material uniaxial tension tensile strength and yield strength, it is in the wrong poor to be by force called for short.
6) if shell material belongs to cyclic softening, according to formula (3), evaluate, meet formula (3), material is qualified, otherwise, for defective.
σ
0+Δσ
T≥σ
c （3）
Wherein, σ
csMYS for shell material, belongs to design load, generally according to 85% of casing grade name lower limit of yield, calculates, i.e. σ
c=σ
s* 85%, σ
sfor casing grade name lower limit of yield, by existing industrial standard, can directly be consulted.
7) provide test evaluation report, comprise three parts:
(1) client, trust time, sleeve pipe are manufactured information, are intended the information such as applied environment design parameter; (2) process of the test is described, and comprises the pictures such as test, sample of different phase, and the information such as data; (3) evaluation conclusion, comprises that whether shell material is qualified, and the summary description of full distance test situation.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a Bauschinger effect evaluating method for sleeve pipe for thickened oil steam-stimulated thermal recovery well, is characterized in that, described evaluating method comprises the following steps:
S1, records by the σ of yield strength at the beginning of evaluation and test shell material
0and tensile strength sigma
t;
S2 is got sleeve pipe sample in evaluation and test shell material in step S1, and described sleeve pipe sample repeatedly draw-is pressed to symmetrical cycle test, records the yield strength σ of each draw stage
1, σ
2, σ
3,
S3, calculates each circulation in step S2 and draws-press the increment Delta σ of rear yield strength
1, Δ σ
2, Δ σ
3..., wherein, Δ σ
n=σ
n-σ
n-1(n=1,2,3 ...), the mean value that defines each yield strength increment is Δ σ;
S4, according to yield strength total increment Δ σ in formula (1) prediction sleeve pipe service life
t:
Δσ
T＝A×B×Δσ （1）
In formula, A is the sleeve design life-span, and unit is year; B is the annual steam injection round of the sleeve pipe upper limit, and unit is times/year;
S5, if Δ σ be on the occasion of, and formula (2) sets up, measured sleeve tube material is qualified, otherwise defective,
Δσ
T≤σ
t-σ
0 （2）；
If Δ σ is negative value, and formula (3) establishment, measured sleeve tube material is qualified, otherwise defective,
σ
0+Δσ
T≥σ
c （3），
In formula (3), σ
csMYS for shell material.
2. Bauschinger effect evaluating method according to claim 1, is characterized in that, described in step S1, by evaluation and test shell material, is pole sample, and gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is greater than or equal to 5 times of diameters.
3. Bauschinger effect evaluating method according to claim 2, is characterized in that, obtains described by the σ of yield strength at the beginning of evaluation and test shell material in step S1
0and tensile strength sigma
ttime, the method for employing uniaxial tension, rate of extension is less than or equal to 0.5mm/min.
4. Bauschinger effect evaluating method according to claim 1, is characterized in that, in step S2, described sleeve pipe sample is carried out drawing-pressing for 5 times symmetrical cycle test, records the yield strength σ of these 5 draw stage
1, σ
2, σ
3, σ
4, σ
5.
5. Bauschinger effect evaluating method according to claim 4, is characterized in that, in step S2, the sample that draws-press for 5 times symmetrical cycle test to use is same sample.
6. Bauschinger effect evaluating method according to claim 5, is characterized in that, the sample of sleeve pipe described in step S2 is pole sample, and gauge length scope inside surface roughness is less than or equal to R0.8, and gauge length is 3～5 times of described sleeve pipe specimen finish.
7. Bauschinger effect evaluating method according to claim 6, is characterized in that, while drawing-pressing symmetrical cycle test described in carrying out, rate of extension is less than or equal to 0.25mm/min.
8. Bauschinger effect evaluating method according to claim 1, is characterized in that, in step S3, the mean value of each yield strength increment be Δ σ on the occasion of time, by evaluation and test shell material, belonged to cyclic hardening; When Δ σ is negative value, by evaluation and test shell material, belonged to cyclic softening.
9. Bauschinger effect evaluating method according to claim 1, is characterized in that, in step S5 formula (3), and the SMYS σ of shell material
cfor design load, according to 85% of casing grade name lower limit of yield, calculate.
10. Bauschinger effect evaluating method according to claim 1, is characterized in that, in step S2, described sleeve pipe sample is carried out drawing-pressing for 6,8 or 9 times symmetrical cycle test.
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|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726445A (en) * | 2008-10-23 | 2010-06-09 | 宝山钢铁股份有限公司 | Method and test specimen for acquiring material parameters related to metal plate strain rate |
| CN101832893A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Measuring method of yield strength of pipeline steel tubes with high steel grade and large wall thickness |
| RU2011123613A (en) * | 2011-06-09 | 2012-12-20 | Государственное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | METHOD STRENGTHENING METHOD |
| CN102841013A (en) * | 2011-06-23 | 2012-12-26 | 北京隆盛泰科石油管科技有限公司 | Method for measuring yield strength of non-planar structure material |
| CN103352176A (en) * | 2013-06-20 | 2013-10-16 | 中国石油天然气集团公司 | Air-cooling type 80H thermal production well casing based on strain design and production process thereof |
-
2013
- 2013-04-18 CN CN201310134329.2A patent/CN104111203B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726445A (en) * | 2008-10-23 | 2010-06-09 | 宝山钢铁股份有限公司 | Method and test specimen for acquiring material parameters related to metal plate strain rate |
| CN101832893A (en) * | 2009-03-09 | 2010-09-15 | 鞍钢股份有限公司 | Measuring method of yield strength of pipeline steel tubes with high steel grade and large wall thickness |
| RU2011123613A (en) * | 2011-06-09 | 2012-12-20 | Государственное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | METHOD STRENGTHENING METHOD |
| RU2537414C2 (en) * | 2011-06-09 | 2015-01-10 | Государственное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | Method of materials hardening |
| CN102841013A (en) * | 2011-06-23 | 2012-12-26 | 北京隆盛泰科石油管科技有限公司 | Method for measuring yield strength of non-planar structure material |
| CN103352176A (en) * | 2013-06-20 | 2013-10-16 | 中国石油天然气集团公司 | Air-cooling type 80H thermal production well casing based on strain design and production process thereof |
Non-Patent Citations (5)
| Title |
|---|
| FUSAHITO YOSHIDA,TAKESHI UEMORI: "A model of large-strain cyclic plasticity describing the Bauschinger effect and workhardening stagnation", 《INTERNATIONAL JOURNAL OF PLASTICITY》 * |
| P.S.BATE AND D.V.WILSON: "Analysis of the bauschinger effect", 《ACTA METALL》 * |
| 彭延玲等: "拉压循环应变对屈服强度和包申格效应的影响", 《热加工工艺》 * |
| 徐凌云等: "管环拉伸性能评价体系探究", 《物理测试》 * |
| 李恒进: "李恒进", 《万方学位论文》 * |
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