CN110185439A - A kind of well is interior without coiled tubing down-hole pressure analogy method under gas condition - Google Patents
A kind of well is interior without coiled tubing down-hole pressure analogy method under gas condition Download PDFInfo
- Publication number
- CN110185439A CN110185439A CN201910289895.8A CN201910289895A CN110185439A CN 110185439 A CN110185439 A CN 110185439A CN 201910289895 A CN201910289895 A CN 201910289895A CN 110185439 A CN110185439 A CN 110185439A
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- Prior art keywords
- quiet
- pressure
- oil
- expansion
- well
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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
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention discloses in a kind of well without coiled tubing down-hole pressure analogy method under gas condition, comprising the following steps: S1: calculate pump flow into well mud volume Vin；S2: outflow mud volume V is calculatedout；S3: mud total volume V ' in pit shaft is calculated；S4: full well coefficient of expansion K in pit shaft is calculated；S5: full well turgor pressure P is calculatedExpansion；S6: the liquid column hydrostatic pressure P of oil pipe and casing is calculatedOil is quietAnd PIt covers quiet；S7: compare POil is quietAnd PIt covers quietSize；If POil is quietGreater than PIt covers quiet, then tubing pressure POil=PExpansion, casing pressure PSet=PExpansion‑(POil is quiet‑PIt covers quiet)；If POil is quietLess than PIt covers quiet, then tubing pressure POil=PExpansion‑(POil is quiet‑PIt covers quiet), casing pressure PSet=PExpansion；S8: plus circulation pressure on oil pressure, the above steps are repeated, and the method for the invention is conducive to improve simulation system to the fidelity of continuous oil pipe operation parameter.
Description
Technical field
It is interior without oil continuous under gas condition that the present invention relates to coiled tubing down-hole pressure measuring and calculating fields more particularly to a kind of well
Pipe down-hole pressure analogy method.
Background technique
In order to enhance the proficiency for just participating in oil field operation personnel, simulation training technology real simulation is generallyd use
Practice of construction environment improves the proficiency of operator by the content that fulfils assignment under virtual environment, while having again very
High safety, loss caused by fault when avoiding execute-in-place.
Therefore, simulation system affects the reduction degree of true environment the quality of simulated training, is being related to Parameters variation
When, accurate measuring method is conducive to improve the accuracy of model foundation.
Summary of the invention
To solve the above-mentioned problems, the present invention proposes that a kind of well is interior without coiled tubing down-hole pressure simulation side under gas condition
Method, comprising the following steps:
S1: it calculates pump and flows into well mud volume Vin；
S2: outflow mud volume V is calculatedout；
S3: mud total volume V ' in pit shaft is calculated；
S4: full well coefficient of expansion K in pit shaft is calculated；
S5: full well turgor pressure P is calculatedExpansion；
S6: the liquid column hydrostatic pressure P of oil pipe and casing is calculatedOil is quietAnd PIt covers quiet；
S7: compare POil is quietAnd PIt covers quietSize；If POil is quietGreater than PIt covers quiet, then tubing pressure POil=PExpansion, casing pressure PSet=PExpansion-
(POil is quiet-PIt covers quiet)；If POil is quietLess than PIt covers quiet, then tubing pressure POil=PExpansion-(POil is quiet-PIt covers quiet), casing pressure PSet=PExpansion；
S8: plus circulation pressure on oil pressure, the above steps are repeated.
Further, the outflow mud volume VoutCalculation isWherein S is circulation area,
Δ p is front and back pressure difference, and ρ is Media density, this formula Applicable media is liquid, need to be multiplied by flow resistance coefficient C if gasd；Mud
Starch total volume V '=inflow well mud volume VinFlow out mud volume Vout+ wellbore volume V；Coefficient of expansion K=V '/V-
1；Turgor pressure PExpansion=K*H, H are mine shaft depth.
The beneficial effects of the present invention are: propose that a kind of well is interior without coiled tubing down-hole pressure simulation side under gas condition
Method is conducive to improve simulation system to the fidelity of continuous oil pipe operation parameter.
Detailed description of the invention
Fig. 1 is in well without coiled tubing down-hole pressure measuring method flow chart under gas condition；
Fig. 2 be in well without gas when oil overpressure schematic diagram；
Fig. 3 is borehole pressure variation schematic diagram.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying example, the present invention is described in further detail.
As shown in Figure 1, without coiled tubing down-hole pressure analogy method under gas condition in a kind of well, comprising the following steps:
S1: it calculates pump and flows into well mud volume Vin；
S2: outflow mud volume V is calculatedout；
S3: mud total volume V ' in pit shaft is calculated；
S4: full well coefficient of expansion K in pit shaft is calculated；
S5: full well turgor pressure P is calculatedExpansion；
S6: the liquid column hydrostatic pressure P of oil pipe and casing is calculatedOil is quietAnd PIt covers quiet；
S7: compare POil is quietAnd PIt covers quietSize；If POil is quietGreater than PIt covers quiet, then tubing pressure POil=PExpansion, casing pressure PSet=PExpansion-
(POil is quiet-PIt covers quiet)；If POil is quietLess than PIt covers quiet, then tubing pressure POil=PExpansion-(POil is quiet-PIt covers quiet), casing pressure PSet=PExpansion；
S8: plus circulation pressure on oil pressure, the above steps are repeated.
POil is quiet=ρ g h；Fluid density in ρ-oil pipe；G-- acceleration of gravity；Liquid depth in h-oil pipe；
PIt covers quiet=ρ g h；Fluid density in ρ-casing；G-- acceleration of gravity；Liquid depth in h-casing.
As shown in Fig. 2, tubing pressure is also known as standpipe pressure, i.e., vertical pressure, when in oil/gas well without gas, pressure is by fluid column
It generates, without under mobility status in well, available pump pressure=vertical pressure, bottom pressure=vertical pressure+standpipe static pressure, bottom pressure
=casing pressure+casing static pressure.Still there is fluid stream since borehole pressure is lower than the maximum pressure pumped at closing well turn on pump initial stage
Enter in well, borehole fluid volume is caused to increase.Since steel sleeve has elasticity, casing meeting slight expansion, pressure rises and is pumped into
Volume is directly proportional.In gasless well, influence of the throttle valve to casing pressure is actually and slush pump concurs.
Therefore, the outflow mud volume VoutCalculation isWherein S is circulation area, Δ
P is front and back pressure difference, and ρ is Media density, this formula Applicable media is liquid, need to be multiplied by flow resistance coefficient C if gasd；Mud
Total volume V '=inflow well mud volume VinFlow out mud volume Vout+ wellbore volume V；Coefficient of expansion K=V '/V-1；
Turgor pressure PExpansion=K*H, H are mine shaft depth.
As shown in figure 3, when throttle valve circulation area S is reduced, in order to keep VoutIt is constant, PSetIt can increase, due to there is part stream
Body rests in well, causes well internal volume insufficient, pit shaft expansion, so as to cause borehole pressure raising.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (5)
1. without coiled tubing down-hole pressure analogy method under gas condition in a kind of well, which comprises the following steps:
S1: it calculates pump and flows into well mud volume Vin；
S2: outflow mud volume V is calculatedout；
S3: mud total volume V ' in pit shaft is calculated；
S4: full well coefficient of expansion K in pit shaft is calculated；
S5: full well turgor pressure P is calculatedExpansion；
S6: the liquid column hydrostatic pressure P of oil pipe and casing is calculatedOil is quietAnd PIt covers quiet；
S7: compare POil is quietAnd PIt covers quietSize；If POil is quietGreater than PIt covers quiet, then tubing pressure POil=PExpansion, casing pressure PSet=PExpansion-
(POil is quiet-PIt covers quiet)；If POil is quietLess than PIt covers quiet, then tubing pressure POil=PExpansion-(POil is quiet-PIt covers quiet), casing pressure PSet=PExpansion；
S8: plus circulation pressure on oil pressure, the above steps are repeated.
2. without coiled tubing down-hole pressure analogy method, feature under gas condition in a kind of well according to claim 1
It is, the outflow mud volume VoutCalculation isWherein S is circulation area, and Δ p is front and back
Pressure difference, ρ are Media density, this formula Applicable media is liquid, need to be multiplied by flow resistance coefficient C if gasd。
3. without coiled tubing down-hole pressure analogy method, feature under gas condition in a kind of well according to claim 1
It is, the mud total volume V '=inflow well mud volume VinFlow out mud volume Vout+ wellbore volume V.
4. without coiled tubing down-hole pressure analogy method, feature under gas condition in a kind of well according to claim 1
It is, the coefficient of expansion K=V '/V-1.
5. without coiled tubing down-hole pressure analogy method, feature under gas condition in a kind of well according to claim 1
It is, the turgor pressure PExpansion=K*H, H are mine shaft depth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289895.8A CN110185439A (en) | 2019-04-11 | 2019-04-11 | A kind of well is interior without coiled tubing down-hole pressure analogy method under gas condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289895.8A CN110185439A (en) | 2019-04-11 | 2019-04-11 | A kind of well is interior without coiled tubing down-hole pressure analogy method under gas condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110185439A true CN110185439A (en) | 2019-08-30 |
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| CN201910289895.8A Pending CN110185439A (en) | 2019-04-11 | 2019-04-11 | A kind of well is interior without coiled tubing down-hole pressure analogy method under gas condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764978A (en) * | 2021-01-18 | 2021-05-07 | 北京开拓鸿业高科技有限公司 | Pressure measurement simulation degree determination method and device, storage medium and electronic equipment |
Citations (8)
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| US20030139916A1 (en) * | 2002-01-18 | 2003-07-24 | Jonggeun Choe | Method for simulating subsea mudlift drilling and well control operations |
| CA2512437A1 (en) * | 2005-07-04 | 2007-01-04 | Javed Shah | Method of controlling a well |
| US20080060846A1 (en) * | 2005-10-20 | 2008-03-13 | Gary Belcher | Annulus pressure control drilling systems and methods |
| US20090194330A1 (en) * | 2005-07-01 | 2009-08-06 | Gray Kenneth E | System, program products, and methods for controlling drilling fluid parameters |
| CN201330573Y (en) * | 2008-11-26 | 2009-10-21 | 西部钻探克拉玛依钻井工艺研究院 | Bottom-hole pressure precision control system of under balance drilling |
| CN101702273A (en) * | 2009-11-10 | 2010-05-05 | 成都盛特石油装备模拟技术开发有限公司 | Portable drilling simulation system |
| CN102777123A (en) * | 2012-05-02 | 2012-11-14 | 西南石油大学 | High-expansibility naked eye suspension adhering system and method |
| CN104637363A (en) * | 2015-01-08 | 2015-05-20 | 西南石油大学 | Fracturing and acidizing simulating and training system and simulating method |
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2019
- 2019-04-11 CN CN201910289895.8A patent/CN110185439A/en active Pending
Patent Citations (8)
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|---|---|---|---|---|
| US20030139916A1 (en) * | 2002-01-18 | 2003-07-24 | Jonggeun Choe | Method for simulating subsea mudlift drilling and well control operations |
| US20090194330A1 (en) * | 2005-07-01 | 2009-08-06 | Gray Kenneth E | System, program products, and methods for controlling drilling fluid parameters |
| CA2512437A1 (en) * | 2005-07-04 | 2007-01-04 | Javed Shah | Method of controlling a well |
| US20080060846A1 (en) * | 2005-10-20 | 2008-03-13 | Gary Belcher | Annulus pressure control drilling systems and methods |
| CN201330573Y (en) * | 2008-11-26 | 2009-10-21 | 西部钻探克拉玛依钻井工艺研究院 | Bottom-hole pressure precision control system of under balance drilling |
| CN101702273A (en) * | 2009-11-10 | 2010-05-05 | 成都盛特石油装备模拟技术开发有限公司 | Portable drilling simulation system |
| CN102777123A (en) * | 2012-05-02 | 2012-11-14 | 西南石油大学 | High-expansibility naked eye suspension adhering system and method |
| CN104637363A (en) * | 2015-01-08 | 2015-05-20 | 西南石油大学 | Fracturing and acidizing simulating and training system and simulating method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112764978A (en) * | 2021-01-18 | 2021-05-07 | 北京开拓鸿业高科技有限公司 | Pressure measurement simulation degree determination method and device, storage medium and electronic equipment |
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Application publication date: 20190830 |
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