CN106339549A - Measuring and calculating method of upwelling speed of oil gas - Google Patents
Measuring and calculating method of upwelling speed of oil gas Download PDFInfo
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Abstract
The invention discloses a measuring and calculating method of the upwelling speed of oil gas. The method is obtained by improving a common late time method serving as a basis, wherein the improvements comprise an improvement on a parameter measuring, calculating and solving method and an improvement on a measuring and calculating formula; according to the method, automatic measurement and calculation are realized by compiling measuring and calculating statements by virtue of Microsoft EXCEL.EXE software. According to the method, the problems that the measurement of parameters is insufficiently accurate, and the design of the formula is insufficiently rigorous existing in the traditional late time method are solved, the accuracy of measurement and calculation of the upwelling speed of the oil gas is improved, and important significance for improving drilling facilities and the safety of persons is realized.
Description
Technical field
The invention belongs to technical field of geophysical exploration is and in particular to a kind of measuring method of Ascending Velocity For Oil ＆ Gas.
Background technology
After opening oil-gas Layer, stop drilling well for some reason, during making a trip or quiescent time, if shaft bottom
Pressure is less than strata pressure, and oil gas entrance pit shaft is simultaneously up.Observe whether hydrocarbon stratum enters pit shaft by the method surveying aftereffect,
So that in time adjustment property of drilling fluid is it is ensured that the safety of drilling well.Specific way is, after static a period of time under get into bottom,
Circulating fluid, by observing the situation of drill-hole returns, if having display that oil gas returns out (such as: have in mud oil bloom or
Gas) or mud density decline, show that oil gas enters pit shaft.By measuring and calculating it is to be understood that the upwelling speed of oil gas.
In drilling well and Downhole Construction, Ascending Velocity For Oil ＆ Gas are the important technology data weighing downhole safety, are true
Determine the important technology foundation of next step arrangement and method for construction measure.Ascending Velocity For Oil ＆ Gas are too high, well kick blowout problem will be led to occur, make
Descend destruction, the destruction to ground environment and the serious threat to wellbore construction safety of petroleum resources in couples.In particular with
The continuous complication expanding year by year with underground situation in oil-gas exploration and development region, is carried with safety to drilling well and underground work technology
Go out higher requirement, the measuring and calculating of Ascending Velocity For Oil ＆ Gas has been also required that more accurate, more convenient.
For the measuring and calculating of Ascending Velocity For Oil ＆ Gas, traditional method includes " lagged time method " and " volumetric method " two methods.
Undoubtedly, both measuring methods are correct in theory.But, the key parameter that both approaches are related to is slow
To the accuracy problem of time, mud pumpage, very big impact is brought on the accuracy of measuring and calculating.
Lagged time method is the method that situ of drilling well has been used up.The main deficiency of this method, one is lagged time
Measurement is comparatively laborious；Two be lagged time survey calculation in be subject to " drilling fluid delivery ratio " impact and drilling tool inner downlink time
Impact, it is difficult to ensure that the accuracy of measuring and calculating；Three is that the measuring and calculating and Ascending Velocity For Oil ＆ Gas measuring and calculating of lagged time enters under different
Under drilling tool number of times and state, data consistency is poor；Four is to be introduced into the display time oil gas not being invaded section in upwelling speed measuring and calculating,
Lack comprehensive；Five is unreasonable with the lagged time measuring and calculating Ascending Velocity For Oil ＆ Gas of drilling cuttings；Six is not account for compound well feelings
Condition；Etc..Meanwhile, the general actual conditions not measuring lagged time of development well drilling well and underground work scene, are also that impact should
The reality that method is calculated.
For volumetric method, scene application is less.The occurrence poor accuracy of mainly mud pumpage, hole capacity is not yet
Easily accurately determine, therefore estimation precision is low.
Ascending Velocity For Oil ＆ Gas measuring method, as well control operation key technology point, directly decides how job site determines
Drilling fluid/density of completion fluids and performance parameter, can provide safeguard for pit shaft safety work.In existing Ascending Velocity For Oil ＆ Gas measuring and calculating side
Under method, because of oil gas well fluids difference, pit shaft and BHA not parity problem, to a certain degree affect well control job safety.
By further investigation, five kinds of Ascending Velocity For Oil ＆ Gas measuring methods of summary and induction, define each measuring and calculating respectively
The corresponding applicable elements of method and measure formula, each have pluses and minuses as follows: Ascending Velocity For Oil ＆ Gas measuring and calculating had been used up in the past
Lagged time method and volumetric method are calculating, but two methods are all fallen termination of pumping by mud pump circulation discharge capacity, midway and gas rises
The impact such as slippage, volumetric method is also affected by Open-Hole Section hole enlargement ratio；Total hydrocarbon Time Method can eliminate the longer shortcoming of Selecting time,
But by hole enlargement ratio, discharge capacity, midway, termination of pumping is affected；Total hydrocarbon Time Method and density hours method have intercommunity, i.e. total hydrocarbon
The rising of display and decline impact drilling fluid density change, two methods not only simple and direct and also can reference pair ratio mutually, total hydrocarbon
Time Method makes up error when drilling fluid density measures, and density hours method makes up the instrumental transmission time difference of total hydrocarbon Time Method；Follow
Ring test method is only affected by oil gas layer depth selection, is not bored displacement volume by under hole enlargement ratio, drilling tool band check-valves, pump is arranged
Amount, midway fall pump impact, can visual in imagely judge whether meet pull out of hole require, but the method exist take the production time long
Shortcoming, in order to overcome the shortcoming of these methods, based on the most frequently used lagged time method, carry out studying and finally draw improvement
Lagged time method.
Content of the invention
In order to overcome the shortcomings of existing oil and gas upwelling speed measuring method presence, improve oil security control ability, this
Invention provides a kind of measuring method of Ascending Velocity For Oil ＆ Gas, and methods described is existing measuring method to be carried out with synthesis improvement and shape
Become.
For realizing above-mentioned target, the present invention employs the following technical solutions:
A kind of measuring method of Ascending Velocity For Oil ＆ Gas, methods described, based on conventional lagged time method, improves and draws.
Including the measuring and calculating improvement of parameter acquiring method and the improvement of measure formula.
Described measuring and calculating parameter acquiring method improvement include the display time determine method improve and oil reservoir position judging method
Improve.
The display time determines that method is improved: one of total hydrocarbon change presence significantly from low value to the mutation of too high value changes
Point (flex point), using this flex point as the display time；
Oil reservoir position judging method improves as follows:
When only single gas-bearing formation: choose this gas-bearing formation well depth and be used for calculating；
When having many gas-bearing formations, judge oil reservoir position by the following method:
(1) there are multiple gas-bearing formations relatively far apart, but a certain top gas-bearing formation is more active, always Ascending Velocity For Oil ＆ Gas are had bright
Development rings, then this should be selected to enliven gas-bearing formation and be used for calculating；
(2) it is multiple peak values to total gas curve, there is the situation of multiple oil-gas Layer, the choosing method of oil-gas Layer is according to oil-gas Layer
The total gas curve in figure total hydrocarbon base value drawn before and after distribution situation and actual oil/gas show to be determined to this shadow with change procedure
Sound oil-gas Layer top circle the most shallow is as hOilValue.
Measure formula improves:
Lagged time method measure formula originally is:
It is improved to:
Wherein: vOn alterAscending Velocity For Oil ＆ Gas, m/h；hOilOil-gas Layer top depth, m；hDrill bitDuring circulating fluid, drill bit is located
Depth, m；tAobviousIt is recycled to the time that oil gas flex point occurs, h from turn on pump；The t termination of pumping time, h；tLateDrill bit place depth
Lagged time, h；tQuietIt is drilled into total quiescent time of this turn on pump, h from termination of pumping；C drilling tool displacement effect correction factor.
Described formula improves content and includes:
Quiescent time improve: consider drilling fluid quiescent time simultaneously add turn on pump circulation after to the time seeing oil/gas show.
The midway termination of pumping time improves: the oil/gas show flex point time should deduct the time t that pump is switched in midway, be only and really open
The oil gas flex point time is seen after pump.
The correction with back-pressure valve for the drilling tool: consider the impact of drilling tool displacement effect, had with oil gas section constant-volume principle:
Wherein h1 is to alter height on the actual oil gas that should ask for, and h2 is the height considering drilling tool displacement effect.
Simultaneously in order to reduce scene using the manual difficulty calculating Ascending Velocity For Oil ＆ Gas and loaded down with trivial details degree, by correlative study,
Above-mentioned classics lagged time method and revised lagged time method can by now widely used Microsoft excel.exe software,
Carry out automatic measurement ＆ calculation by writing measuring and calculating sentence.
A kind of measuring method of Ascending Velocity For Oil ＆ Gas, the method comprising the steps of:
1) manually ask for the well depth of drill bit circulation position and correspond to the lagged time at bit location under discharge capacity；
2) after asking for lagged time, termination of pumping, record the termination of pumping time, carry out short trip 10-15 column；
3) get into last time under and ask at lagged time position, turn on pump circulates, record Running pump time；
4) during well room observation oil/gas show, write down and start display time, time to peak and end time；
5) calculate termination of pumping respectively to show with oil/gas show time t between the turn on pump quiet stopping time, and determine abnormal oil-gas Layer position；
6) fill in detection parameter according to improvement lagged time method related content；
7), after asking for correlation computations parameter, the idealization lagged time method formula calculating instrument of establishment, consideration can be used respectively
After between the quiet stopping time, lagged time method improves formula calculating instrument, midway termination of pumping improves formula calculating instrument and carries in back-pressure valve correction
Alter speed calculating instrument etc. and calculate Ascending Velocity For Oil ＆ Gas.
It is not smart that advantages of the present invention and having the beneficial effect that overcomes the parameter measurement that traditional lagged time method exists
Really, the not rigorous problem of formula design, improves the accuracy of oil and gas upwelling speed measuring and calculating, for raising drilling facilities and people
Member's security is significant.
Specific embodiment
Embodiment
A kind of measuring method of Ascending Velocity For Oil ＆ Gas, methods described, based on conventional lagged time method, improves
Draw.Including the measuring and calculating improvement of parameter acquiring method and the improvement of measure formula.
Described measuring and calculating parameter acquiring method improvement include the display time determine method improve and oil reservoir position judging method
Improve.
The display time determines that method is improved: one of total hydrocarbon change presence significantly from low value to the mutation of too high value changes
Point (flex point), using this flex point as the display time；
Oil reservoir position judging method improves as follows:
When only single gas-bearing formation: choose this gas-bearing formation well depth and be used for calculating；
When having many gas-bearing formations, judge oil reservoir position by the following method:
(1) there are multiple gas-bearing formations relatively far apart, but a certain top gas-bearing formation is more active, always Ascending Velocity For Oil ＆ Gas are had bright
Development rings, then this should be selected to enliven gas-bearing formation and be used for calculating；
(2) it is multiple peak values to total gas curve, there is the situation of multiple oil-gas Layer, the choosing method of oil-gas Layer is according to oil-gas Layer
The total gas curve in figure total hydrocarbon base value drawn before and after distribution situation and actual oil/gas show to be determined to this shadow with change procedure
Sound oil-gas Layer top circle the most shallow is as hOilValue.
Measure formula improves:
Lagged time method measure formula originally is:
It is improved to:
Wherein: vOn alterAscending Velocity For Oil ＆ Gas, m/h；hOilOil-gas Layer top depth, m；hDrill bitDuring circulating fluid, drill bit is located
Depth, m；tAobviousIt is recycled to the time that oil gas flex point occurs, h from turn on pump；The t termination of pumping time, h；tLateDrill bit place depth
Lagged time, h；tQuietIt is drilled into total quiescent time of this turn on pump, h from termination of pumping；C drilling tool displacement effect correction factor.
Described formula improves content and includes:
Quiescent time improve: consider drilling fluid quiescent time simultaneously add turn on pump circulation after to the time seeing oil/gas show.
The midway termination of pumping time improves: the oil/gas show flex point time should deduct the time t that pump is switched in midway, be only and really open
The oil gas flex point time is seen after pump.
The correction with back-pressure valve for the drilling tool: consider the impact of drilling tool displacement effect, had with oil gas section constant-volume principle:
Wherein h1 is to alter height on the actual oil gas that should ask for, and h2 is the height considering drilling tool displacement effect.
Simultaneously in order to reduce scene using the manual difficulty calculating Ascending Velocity For Oil ＆ Gas and loaded down with trivial details degree, by correlative study,
Above-mentioned classics lagged time method and revised lagged time method can by now widely used Microsoft excel.exe software,
Carry out automatic measurement ＆ calculation by writing measuring and calculating sentence.
A kind of measuring method of Ascending Velocity For Oil ＆ Gas, the method comprising the steps of:
1) manually ask for the well depth of drill bit circulation position and correspond to the lagged time at bit location under discharge capacity；
2) after asking for lagged time, termination of pumping, record the termination of pumping time, carry out short trip 10-15 column；
3) get into last time under and ask at lagged time position, turn on pump circulates, record Running pump time；
4) during well room observation oil/gas show, write down and start display time, time to peak and end time；
5) calculate termination of pumping respectively to show with oil/gas show time t between the turn on pump quiet stopping time, and determine abnormal oil-gas Layer position；
6) fill in detection parameter according to improvement lagged time method related content, referring to table 1；
7), after asking for correlation computations parameter, calculated using the oil and gas upwelling speed software for calculation of establishment and speed is altered on oil gas
Degree, referring to table 2.
Table 1 improves lagged time method and calculates Ascending Velocity For Oil ＆ Gas relevant parameter detection record
Table 2 improves lagged time method and calculates Ascending Velocity For Oil ＆ Gas automation computation sheet
, with discharge capacity 50.32 l/s circulating fluid wellbore clearance 3h, oil-gas Layer top depth is 3572m, records taking x well as a example
Lagged time 83min at 3795m circulation position.Determine that the flex point time is oil gas according to oil/gas show process record oil/gas show
The display time is 65min, and quiescent time is 15h.The midway termination of pumping time is 0, and live borehole size is 316.5mm, drilling tool size
177.8mm, takes correction factor c to be 0.6844.With aforementioned improved lagged time method formula and drilling tool band back-pressure valve result of calculation
Correction formula and execl.exe automation computation sheet, calculating Ascending Velocity For Oil ＆ Gas is 25.53m/h.Using this speed as rear
The foundation of continuous operating decision.This well follow-up pull out of hole, well logging, under get into bottom turn on pump circulation used time 54h, in above operation process
Logging equipment does not monitor that total hydrocarbon changes, and the well control problem such as overflow.In sum, using slow after of the present invention correction
To in the case of Time Method formula and drilling tool band back-pressure valve to result of calculation correction, record Ascending Velocity For Oil ＆ Gas 25.53m/h and meet
Field operation needs.
It is last that it is noted that obvious, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to embodiment.For those of ordinary skill in the field, can also do on the basis of the above description
Go out change or the variation of other multi-forms.There is no need to be exhaustive to all of embodiment.And thus drawn
The obvious change stretched out or change among still in protection scope of the present invention.
Claims (9)
1. a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that: methods described based on conventional lagged time method,
Improve and draw, including the measuring and calculating improvement of parameter acquiring method and the improvement of measure formula；Methods described is by Microsoft
Excel.exe software, realizes automatic measurement ＆ calculation by writing measuring and calculating sentence.
2. as claimed in claim 1 a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that: described measuring and calculating parameter ask for
The improvement of method include the display time determine method improve and oil reservoir position judging method improve.
3. as claimed in claim 1 or 2 a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that: the described display time
The method that determines is improved and is, using one present in total hydrocarbon change procedure significantly from low value to the flex point of too high value changes as aobvious
Show the time.
4. as claimed in claim 1 or 2 a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that oil reservoir position judgment
Method is improved as follows:
1) when only single gas-bearing formation, choose this gas-bearing formation well depth and be used for calculating；
2) when having many gas-bearing formations, judge oil reservoir position by the following method:
A, there are multiple gas-bearing formations relatively far apart, but a certain top gas-bearing formation is more active, always Ascending Velocity For Oil ＆ Gas is had bright
Development rings, then this should be selected to enliven gas-bearing formation and be used for calculating；
B, it is multiple peak values to total gas curve, there is the situation of multiple oil-gas Layer, the choosing method of oil-gas Layer is according to oil-gas Layer
The total gas curve in figure total hydrocarbon base value drawn before and after distribution situation and actual oil/gas show to be determined to this shadow with change procedure
Sound oil-gas Layer top circle the most shallow is as hOilValue.
5. as claimed in claim 1 a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that: described formula improves content
Improve and the correction with back-pressure valve for the drilling tool including quiescent time improvement, midway termination of pumping time.
6. a kind of Ascending Velocity For Oil ＆ Gas as described in claim 1 or 5 measuring method it is characterised in that: described quiescent time
Improvement be it is considered to drilling fluid quiescent time simultaneously add turn on pump circulation after to the time seeing oil/gas show.
7. a kind of Ascending Velocity For Oil ＆ Gas as described in claim 1 or 5 measuring method it is characterised in that: the termination of pumping of described midway
Time improvement is that the oil/gas show flex point time should deduct the time t that pump is switched in midway, sees oil gas flex point after being only real turn on pump
Time.
8. a kind of Ascending Velocity For Oil ＆ Gas as described in claim 1 or 5 measuring method it is characterised in that: described drilling tool is taken back
The correction of pressure valve is it is considered to the impact of drilling tool displacement effect, is had with oil gas section constant-volume principle:
Wherein h1 is to alter height on the actual oil gas that should ask for, and h2 is the height considering drilling tool displacement effect.
9. as claimed in claim 1 a kind of measuring method of Ascending Velocity For Oil ＆ Gas it is characterised in that methods described include following
Step:
1) manually ask for the well depth of drill bit circulation position and correspond to the lagged time at bit location under discharge capacity；
2) after asking for lagged time, termination of pumping, record the termination of pumping time, carry out short trip 10-15 column；
3) get into last time under and ask at lagged time position, turn on pump circulates, record Running pump time；
4) during well room observation oil/gas show, write down and start display time, time to peak and end time；
5) calculate termination of pumping respectively to show with oil/gas show time t between the turn on pump quiet stopping time, and determine abnormal oil-gas Layer position；
6) fill in detection parameter according to improvement lagged time method related content；
7), after asking for correlation computations parameter, Ascending Velocity For Oil ＆ Gas are calculated using the calculating instrument relying on excel.exe establishment.
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| CN201610747268.0A CN106339549A (en) | 2016-08-29 | 2016-08-29 | Measuring and calculating method of upwelling speed of oil gas |
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| CN201610747268.0A CN106339549A (en) | 2016-08-29 | 2016-08-29 | Measuring and calculating method of upwelling speed of oil gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107066768A (en) * | 2017-06-06 | 2017-08-18 | 长江大学 | Ascending Velocity For Oil ＆ Gas computational methods |
| CN110485992A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | One kind being drilled well Ascending Velocity For Oil & Gas calculation method |
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| CN101139925A (en) * | 2006-09-08 | 2008-03-12 | 西南石油大学 | Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
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| CN101139925A (en) * | 2006-09-08 | 2008-03-12 | 西南石油大学 | Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
| WO2015112522A1 (en) * | 2014-01-24 | 2015-07-30 | Caterpillar Inc. | Pump system with automated testing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107066768A (en) * | 2017-06-06 | 2017-08-18 | 长江大学 | Ascending Velocity For Oil ＆ Gas computational methods |
| CN110485992A (en) * | 2018-05-14 | 2019-11-22 | 中国石油化工股份有限公司 | One kind being drilled well Ascending Velocity For Oil & Gas calculation method |
| CN110485992B (en) * | 2018-05-14 | 2021-11-26 | 中国石油化工股份有限公司 | Method for calculating oil gas channeling speed for well drilling and completion |
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