CN102434149A - Mean hole diameter measuring method - Google Patents
Mean hole diameter measuring method Download PDFInfo
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- CN102434149A CN102434149A CN2011103954395A CN201110395439A CN102434149A CN 102434149 A CN102434149 A CN 102434149A CN 2011103954395 A CN2011103954395 A CN 2011103954395A CN 201110395439 A CN201110395439 A CN 201110395439A CN 102434149 A CN102434149 A CN 102434149A
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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 the drilling engineering technical field, be specifically related to a kind of measuring method of MDIA.
Background technology
The oil and gas well drilling engineering need be grasped well hole diameter situation in advance when work such as well cementation, cementing plug, processing accident and complex situations, evaluation hole quality.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 the pit shaft to measure, but because down-hole complicacy or other reasons can't be delivered to safety work in the pit shaft with logger; Often maybe can not log well; Disappearance hole diameter data causes harmful effect to constructions such as above-mentioned well cementation, mainly show can not appropriate design cement the well, the cementing plug cement slurry volume; Can not specific aim formulate processing accident and complex measures, the serious construction that causes is failed.
Summary of the invention
The technical problem that the present invention will solve is because complicated condition causes measuring inconvenient problem when measuring hole diameter in the 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 may further comprise the steps:
(1) when being drilled into the upper end of waiting the section of well logging under the drilling tool, in drilling fluid, inject identification liquid, measure identification liquid from beginning to be injected into the time T a that returns to well head;
When (2) continuing to be drilled into the lower end of waiting the section of well logging down, in drilling fluid, inject identification liquid once more, measure identification liquid from being injected into the time T b that returns to well head;
(3) pass through formula: D=2 [(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5, calculating and treat well logging section MDIA, in the formula: D is for treating well logging section average diameter, and Qa is the discharge capacity of drilling fluid, and Hb-Ha is the degree of depth of waiting the section of well logging.
Wherein, above-mentioned described drilling tool is a circulation pipe pillar drilling tool.As creep into tubing strings capable of circulation such as drilling tool tubing string, cementing plug drilling tool tubing string, well cementation sleeve pipe tubing string, accident complex process drilling tool tubing string.
Further, in order to reduce the error of twice measurement, said step (1) is identical with the discharge capacity of drilling fluid in the step (2).
In order further to reduce error, said step (1) is identical with the injection rate of identification liquid in the step (2).
During drilling well is produced, all be (the serious leakage drilling fluid liquid level not when well head, gas drilling except) that is full of drilling fluid in most cases in the pit shaft, circulation of drilling fluid is used.So, before each pump is annotated identification liquid, must be full of drilling fluid and ability normal circulation in the pit shaft.
After pit shaft forms, inject a certain amount of identification liquid (generally much smaller than hole volume, about 10 sides just satisfy with interior) at any 2, continue circulation with drilling fluid, return out well head up to identification liquid, Measuring Time is poor, just can calculate MDIA.
In the time of many, often all be lowered to the sleeve pipe of certain well depth in the drilling engineering, its hole diameter rule, known on top.Only need to measure once, deduct top fixed well section, can calculate MDIA in bore hole (promptly treating the well logging section).
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 the hole volume size, and hole volume is big more, and the identification liquid use amount also strengthens thereupon; Purpose is to be convenient to observe and detect, and general 152.4mm～311.2mm pit shaft use amount is 5～10 sides.During embodiment of the present invention, annotated the identification liquid continued and injected drilling fluid, be recycled to well head up to identification liquid and be detected.Identification liquid can be prepared with drilling fluid materials, but differentiation is convenient in physicochemical properties individual events or multinomial obviously different with drilling fluid such as its density, viscosity, shear force, color, suspension, 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 does not contain loss circulation material (being the inertia suspension), and for realizing distinguishing, identification liquid can be mixed with: density 1.50 g/cm
3, funnel viscosity 100 seconds, shear force 20 Pascals, color black contains 3% loss circulation material.Like this, when identification liquid returns well head, be easy to just can judge through examine (having or not loss circulation material), measurement (density, funnel viscosity, shear force) etc. with observing whether identification liquid returns well head.
The material of adjustment density is a heavy weight additive, like blanc fixe, agstone etc.; The material of adjustment viscosity, shear force is a thinner, like sulfonation tannin, HTX etc.; Suspension can be used the solid sealing agent, like drill-feeding plugging agent, bridging plug sealing agent etc.
Compared with prior art, the present invention has following beneficial effect:
1, applied widely.All can accomplish normal pit shaft and complicated pit shaft.
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 cementation sleeve pipe tubing string, accident complex process drilling tool tubing string.Need not be lowered to special tubing string.
3, measure simply.Only need measure discharge capacity, time during measurement.
4, the hole diameter data of measuring satisfy general drilling engineering needs.The hole diameter data that calculate according to the present invention are MDIA data, have comprised the displacement efficiency factor, can instruct operations such as well cementation, cementing plug.
5, efficient is high.The present invention directly adopts the tubing string in the pit shaft to get final product operation, need not be lowered to measuring apparatus, and efficient is high.
6, identification liquid is easy to preparation, can or sneak into a certain proportion of inert material through adjustment drilling fluid viscosity, shear force, density.
Description of drawings
Fig. 1 is for being drilled into the structural representation of waiting the section of well logging upper end down;
Fig. 2 is drilled into the structural representation of waiting the section of well logging lower end down.
Wherein, Reference numeral is respectively: 1 drilling tool, 2 casing sections, 3 are treated the well logging section.
The specific embodiment
To combine the accompanying drawing and the specific embodiment that the present invention is done further description below.
Embodiment
As depicted in figs. 1 and 2, measure the MDIA of waiting the section of well logging.One jar of identification liquid of preparation is increased to drip with drilling fluid viscosity shear force earlier.Treat well logging section upper end with being drilled under the drilling tool, promptly a certain amount of identification liquid injects according to discharge capacity Qa in well depth Ha place, observes the 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 that returns out.Treat well logging section lower end with being drilled under the drilling tool again, promptly a certain amount of identification liquid injects according to discharge capacity Qb in well depth Hb place, and record identification liquid is from being injected into the time T b that returns 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 identification liquid by the B point to △ T running time that A is ordered
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
Identification liquid by the B point to △ T=T2-T1=Tb-Vb/Qa-Ta+Va/Qa circulation timei that A is ordered
2, the hole volume Vab between calculating AB point
Drilling tool between the annular space volume V ring between the Vab=AB point+AB point effluxes volume V
Wherein, V is a known quantity.
V ring=△ T * Qa
Obtain Vab=△ T * Qa+V
3, the MDIA D between calculating AB point
According to Vab=(Hb-Ha) * ∏/4 * D
2=△ T * Qa+V
D=2 [(△ T * Qa+V)/∏/(Hb-Ha)]
0.5
Be D=2 [(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5
Claims (4)
1. the measuring method of MDIA, it is characterized in that: it may further comprise the steps:
(1) when being drilled into the upper end of waiting the section of well logging under the drilling tool, in drilling fluid, inject identification liquid, measure identification liquid from beginning to be injected into the time T a that returns to well head;
When (2) continuing to be drilled into the lower end of waiting the section of well logging down, in drilling fluid, inject identification liquid once more, measure identification liquid from being injected into the time T b that returns to well head;
(3) pass through formula: D=2 [(Tb-Ta) * Qa/ ∏/(Hb-Ha)]
0.5, calculating and treat well logging section MDIA, in the formula: D is for treating well logging section average diameter, and Qa is the discharge capacity of drilling fluid, and Hb-Ha is the degree of depth of waiting the section of well logging.
2. the measuring method of MDIA according to claim 1, it is characterized in that: said drilling tool is a circulation pipe pillar drilling tool.
3. the measuring method of MDIA according to claim 1 is characterized in that: said step (1) is identical with the discharge capacity of drilling fluid in the step (2).
4. the measuring method of MDIA according to claim 3 is characterized in that: said step (1) is identical with the injection rate of identification liquid in the 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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| Publication Number | Publication Date |
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| CN102434149A true CN102434149A (en) | 2012-05-02 |
| CN102434149B CN102434149B (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110395439.5A Active CN102434149B (en) | 2011-12-03 | 2011-12-03 | Mean hole diameter measuring method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061752A (en) * | 2013-01-25 | 2013-04-24 | 曾庆义 | Method and apparatus for measuring drill hole diameter by 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 equipment for testing radius of steam cavity of steam injection 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 equipment for testing radius of steam cavity of steam injection well |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061752A (en) * | 2013-01-25 | 2013-04-24 | 曾庆义 | Method and apparatus for measuring drill hole diameter by pouch |
| CN103061752B (en) * | 2013-01-25 | 2018-06-15 | 曾庆义 | A kind of method and device that bore diameter is measured using pouch |
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| Publication number | Publication date |
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| CN102434149B (en) | 2014-03-05 |
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