CN102434149B - Mean hole diameter measuring method - Google Patents
Mean hole diameter measuring method Download PDFInfo
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- CN102434149B CN102434149B CN201110395439.5A CN201110395439A CN102434149B CN 102434149 B CN102434149 B CN 102434149B CN 201110395439 A CN201110395439 A CN 201110395439A CN 102434149 B CN102434149 B CN 102434149B
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Abstract
The invention discloses a mean hole diameter measuring method, which belongs to the technical field of well drilling engineering, and can solve the technical problem that the measurement is not convenient due to complex condition when measuring the hole diameter in the prior art. The measuring method comprises the following steps: when a drilling rig drills down to the upper end of a well interval to be measured, marking liquid is filled into drilling fluid, the time Ta from the initial filling of the marking liquid to return to the wellhead is measured; when the drilling rig continuously drills down to the lower end of the well interval to be measured, marking liquid is filled into the drilling fluid again, and the time Tb from the initial filling of the marking liquid to returning to the wellhead is measured; and the mean hole diameter of the well interval to be measured is calculated with the following formula: D=2[Tb-Ta]*Qa/II/(Hb-Ha)]0.5. The method is mainly used for measuring the hole diameter in well drilling engineering.
Description
Technical field
The invention belongs to drilling engineering technical field, be specifically related to a kind of measuring method of MDIA.
Background technology
Oil and gas well drilling engineering, when the work such as well cementation, cementing plug, processing accident and complex situations, evaluation hole quality, need to be grasped well hole diameter situation in advance.Caliper logging generally adopts logger to carry out, and needs the regular hour to carry out specially.Its working method is with drilling tool or cable, logger to be sent in pit shaft and measured, but due to down-hole complexity or other reasons, logger cannot be delivered to safety work in pit shaft, often maybe can not log well, disappearance hole diameter data, causes harmful effect to constructions such as above-mentioned well cementation, be mainly manifested in can not appropriate design cement the well, cementing plug cement slurry volume, can not specific aim formulate processing accident and complex measures, serious causing constructed unsuccessfully.
Summary of the invention
The technical problem to be solved in the present invention is because complicated condition causes measuring inconvenient problem while measuring hole diameter in prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme: the measuring method of MDIA, and it comprises the following steps:
(1) while being drilled into the upper end until well logging section under drilling tool, in drilling fluid, inject identification liquid, measure identification liquid from starting to be injected into the time T a returning to well head;
(2) while being drilled into the lower end until well logging section under continuing, again in drilling fluid, inject identification liquid, measure identification liquid from being injected into the time T b returning to well head;
(3) pass through formula: D=2[(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5, calculate and treat a well logging section MDIA, in formula: D is for treating a well logging section average diameter, the discharge capacity that Qa is drilling fluid, Hb-Ha is the degree of depth for the treatment of well logging section.
Wherein, drilling tool described above is circulation pipe pillar drilling tool.As creep into the tubing strings capable of circulation such as drilling tool tubing string, cementing plug drilling tool tubing string, well cementing casing pipe tubing string, accident complex process drilling tool tubing string.
Further, in order to reduce the error of twice measurement, described step (1) is identical with the discharge capacity of drilling fluid in step (2).
In order further to reduce error, described step (1) is identical with the injection rate of identification liquid in step (2).
During drilling well is produced, be all (the severe circulation loss drilling fluid liquid level not when well head, gas drilling except) that is full of drilling fluid in most cases in pit shaft, circulation of drilling fluid is used.So, before each infusion identification liquid, in pit shaft, must be full of drilling fluid and energy normal circulation.
After pit shaft forms, at any two points, inject a certain amount of identification liquid (generally much smaller than hole volume, about 10 sides just meet with interior), with drilling fluid, continue circulation, until identification liquid returns out well head, Measuring Time is poor, just can calculate MDIA.
In the time of many, in drilling engineering, often on top, be all lowered to the sleeve pipe of certain well depth, its hole diameter rule, known.Only need measure once bore hole (treating well logging section), deduct top fixed well section, can calculate MDIA.
In order to measure identification liquid from being injected into the time of returning out, identification liquid must be easy to observe or detect, its use amount can be adjusted according to hole volume size, hole volume is larger, identification liquid use amount also strengthens thereupon, object is to be convenient to observe and detect, and general 152.4mm～311.2mm pit shaft use amount is 5～10 sides.Implement when of the present invention, continue to inject drilling fluid after having noted identification liquid, until identification liquid is recycled to well head, be detected.Identification liquid can be prepared with drilling fluid materials, and the physicochemical properties such as its density, viscosity, shear force, color, suspension can individual event or multinomial obviously different from drilling fluid, is convenient to distinguish, and is easy to observe or detect.Such as, drilling fluid density 1.20g/cm
3, funnel viscosity 50 seconds, shear force 8 Pascals, color black, not containing loss circulation material (being inertia suspension), distinguishes for realizing, and identification liquid can be mixed with: density 1.50 g/cm
3, funnel viscosity 100 seconds, shear force 20 Pascals, color black, containing 3% loss circulation material.Like this, when identification liquid returns well head, by observe (having or not loss circulation material), measurement (density, funnel viscosity, shear force) etc. with eye, be easy to just can judge whether identification liquid returns well head.
The material of adjusting density is heavy weight additive, as blanc fixe, agstone etc.; The material of adjusting viscosity, shear force is thinner, as sulfonation tannin, HTX etc.; Suspension can be used solid sealing agent, as drill-feeding plugging agent, bridging plug sealing agent etc.
Compared with prior art, the present invention has following beneficial effect:
1, applied widely.To normal pit shaft and complicated pit shaft, all can complete.
2, be applicable to multiple tubing string.Comprise tubing strings capable of circulation such as creeping into drilling tool tubing string, cementing plug drilling tool tubing string, well cementing casing pipe tubing string, accident complex process drilling tool tubing string.Do not need to be lowered to special tubing string.
3, measure simply.During measurement, only need to measure discharge capacity, time.
4, the hole diameter data of measuring meet general drilling engineering needs.The hole diameter data that calculate according to the present invention, are MDIA data, have comprised displacement efficiency factor, can instruct the operations such as well cementation, cementing plug.
5, efficiency is high.The present invention directly adopts the tubing string in pit shaft to get final product operation, does not need to be lowered to measuring apparatus, and efficiency is high.
6, identification liquid is easy to preparation, can be by adjusting drilling fluid viscosity, shear force, density or sneaking into a certain proportion of inert material.
Accompanying drawing explanation
Fig. 1 is drilled into the structural representation for the treatment of well logging section upper end under being;
Fig. 2 is drilled into the structural representation for the treatment of well logging section lower end under being.
Wherein, Reference numeral is respectively: 1 drilling tool, 2 casing sections, 3 are treated well logging section.
The specific embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
Embodiment
As depicted in figs. 1 and 2, measure the MDIA for the treatment of well logging section.First prepare a tank identification liquid, drilling fluid viscosity shear force is increased to drip.By being drilled under drilling tool, treat a well logging section upper end, well depth Ha place, injects a certain amount of identification liquid according to discharge capacity Qa, observes drilling fluid outlet, and discovery high viscosity shear force liquid returns out and is identification liquid and returns out, and record identification liquid is from being injected into the time T a returning out.By being drilled under drilling tool, treat well logging section lower end again, well depth Hb place, injects a certain amount of identification liquid according to discharge capacity Qb, and record identification liquid is from being injected into the time T b returning out.For reducing systematic error, twice identification liquid injection rate should be identical, and discharge capacity is also identical, i.e. Qa=Qb.
Calculate:
1, calculate △ T running time that identification liquid is ordered to A by B point
Known: A dot cycle identification liquid cycle time T a=at drilling tool t1+ circulation timei in annular space cycle time T 1.
In drilling tool circulation timei t1=drilling tool internal volume Va/ discharge capacity Qa
B dot cycle identification liquid cycle time T b=at drilling tool t2+ circulation timei in annular space cycle time T 2.
In drilling tool circulation timei t2=drilling tool internal volume Vb/ discharge capacity Qb
Obtain: T1=Ta-Va/Qa
T2=?Tb-Vb/Qa
△ T=T2-T1=Tb-Vb/Qa-Ta+Va/Qa circulation timei that identification liquid is ordered to A by B point
2, calculate the hole volume Vab between AB point
The long-pending V of drilling tool efflux body between the annular space volume V ring+AB point between Vab=AB point
Wherein, V is known quantity.
V ring=△ T * Qa
Obtain Vab=△ T * Qa+V
3, calculate the MDIA D between AB point
According to Vab=(Hb-Ha) * ∏/4 * D
2=△ T * Qa+V
Obtain D=2[(△ T * Qa+V)/∏/(Hb-Ha)]
0.5
Be D=2[(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5.
Claims (1)
1. the measuring method of MDIA, is characterized in that: it comprises the following steps:
(1) while being drilled into the upper end until well logging section under drilling tool, in drilling fluid, inject identification liquid, measure identification liquid from starting to be injected into the time T a returning to well head;
(2) while being drilled into the lower end until well logging section under continuing, again in drilling fluid, inject identification liquid, measure identification liquid from being injected into the time T b returning to well head;
(3) pass through formula: D=2[(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5, calculate and treat a well logging section MDIA, in formula: D is for treating a well logging section average diameter, the discharge capacity that Qa is drilling fluid, Hb-Ha is the degree of depth for the treatment of well logging section; Step (1) is identical with the discharge capacity of drilling fluid in step (2).
2. the measuring method of MDIA according to claim 1, is characterized in that: described drilling tool is circulation pipe pillar drilling tool.
3. the measuring method of MDIA according to claim 3, is characterized in that: described step (1) is identical with the injection rate of identification liquid in step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110395439.5A CN102434149B (en) | 2011-12-03 | 2011-12-03 | Mean hole diameter measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110395439.5A CN102434149B (en) | 2011-12-03 | 2011-12-03 | Mean hole diameter measuring method |
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| CN102434149A CN102434149A (en) | 2012-05-02 |
| CN102434149B true CN102434149B (en) | 2014-03-05 |
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| CN201110395439.5A Active CN102434149B (en) | 2011-12-03 | 2011-12-03 | Mean hole diameter measuring method |
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| CN103061752B (en) * | 2013-01-25 | 2018-06-15 | 曾庆义 | A kind of method and device that bore diameter is measured using pouch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243099A (en) * | 1978-05-24 | 1981-01-06 | Schlumberger Technology Corporation | Selectively-controlled well bore apparatus |
| CN1403685A (en) * | 2002-09-28 | 2003-03-19 | 浙江大学 | Pile hole callipers |
| CN101029566A (en) * | 2007-04-13 | 2007-09-05 | 陈耕 | Reciprocating multi-testing arm well diameter tester |
| CN101403298A (en) * | 2008-11-19 | 2009-04-08 | 陈耕 | Double-driving combination logging probe |
| CN201372793Y (en) * | 2009-02-20 | 2009-12-30 | 西安威盛电子仪器有限公司 | X-Y caliper logging instrument |
| CN102102509A (en) * | 2010-12-27 | 2011-06-22 | 中国石油天然气股份有限公司 | Method and device for testing semi-diameter of steam cavity of steam pouring well |
-
2011
- 2011-12-03 CN CN201110395439.5A patent/CN102434149B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4243099A (en) * | 1978-05-24 | 1981-01-06 | Schlumberger Technology Corporation | Selectively-controlled well bore apparatus |
| CN1403685A (en) * | 2002-09-28 | 2003-03-19 | 浙江大学 | Pile hole callipers |
| CN101029566A (en) * | 2007-04-13 | 2007-09-05 | 陈耕 | Reciprocating multi-testing arm well diameter tester |
| CN101403298A (en) * | 2008-11-19 | 2009-04-08 | 陈耕 | Double-driving combination logging probe |
| CN201372793Y (en) * | 2009-02-20 | 2009-12-30 | 西安威盛电子仪器有限公司 | X-Y caliper logging instrument |
| CN102102509A (en) * | 2010-12-27 | 2011-06-22 | 中国石油天然气股份有限公司 | Method and device for testing semi-diameter of steam cavity of steam pouring well |
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| CN102434149A (en) | 2012-05-02 |
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