CN107066768A - Ascending Velocity For Oil ＆ Gas computational methods - Google Patents
Ascending Velocity For Oil ＆ Gas computational methods Download PDFInfo
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- 230000001174 ascending effect Effects 0.000 title claims abstract description 20
- 238000000205 computational method Methods 0.000 title claims abstract description 17
- 238000007654 immersion Methods 0.000 claims abstract description 40
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 238000005553 drilling Methods 0.000 claims abstract description 23
- 238000002386 leaching Methods 0.000 claims abstract description 15
- 238000004364 calculation method Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 9
- 241000209094 Oryza Species 0.000 claims description 7
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- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 229930195733 hydrocarbon Natural products 0.000 claims description 6
- 150000002430 hydrocarbons Chemical class 0.000 claims description 6
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- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of Ascending Velocity For Oil ＆ Gas computational methods, comprise the following steps：1) determine to show the time started and terminate the time；2) pumpage is determined；3) hole diameter is determined；4) oil gas leaching liquid-column height is calculated；5) Ascending Velocity For Oil ＆ Gas is calculated.Computational methods of the present invention can avoid theoretical calculation lagged time, actual measurement lagged time, top from seriously caving in the interference of the factors such as well section volume, do not caused to be influenceed by multiple start-stop pump in constructing, drilling tool is eliminated to the row of oil gas immersion liquid post for effect, and provides a kind of situ of drilling well is simple to operate, value is convenient, true and reliable computational methods.
Description
Technical field
The present invention relates to geophysical reconnaissance technical field, and in particular to a kind of Ascending Velocity For Oil ＆ Gas computational methods.
Background technology
In oil drilling, when drilling fluid is static in pit shaft, underground oil and gas constantly enters pit shaft, and continuous along drilling well fluid column
Upper leaching, its upwelling speed is the important evidence for evaluating the geologic features such as reservoir properties, oil and gas richness degree, strata pressure.Traditional is upper
Altering speed calculation method mainly has lagged time method and the class of volumetric method two, and its common ground is first to calculate oil gas immersion liquid capital face extremely
The distance of well head, then according to oil-gas Layer buried depth, calculate oil gas leaching liquid-column height and upwelling speed.Difference is：The former leads to
The lagged time that well head is returned out in oil gas immersion liquid capital face is crossed, the distance of oil gas immersion liquid capital face and well head is calculated；The latter passes through
Oil gas immersion liquid capital face calculates the distance of oil gas immersion liquid capital face and well head to the drilling fluid volume between well head.
Wherein, lagged time method is the method that situ of drilling well is generally used, but its by casing programme, drilling tool structure, repeatedly
The influence of the construction factors such as start-stop pump, is calculated complex.Again because theoretical lagged time and true lagged time are in the presence of certain inclined
Difference, especially in deep-well, its deviation can be significantly increased.Volumetric method is few in oil drilling onsite application, because of well in wellbore construction
It is normality that wall, which caves in, and stratum brill ETAD expected time of arrival and departure is longer, and its degree of caving in is more serious, causes theoretical hole volume and actual pit shaft
Body, which holds, has deviation, and the oil gas leaching liquid-column height calculated according to this, the degree of accuracy does not have the height that lagged time method is calculated.
Above-mentioned two traditional methods, are all to calculate the distance between oil gas immersion liquid capital face and well head first, so as to calculate
Outlet soaks liquid-column height.Oil-gas Layer buried depth mostly in km to several kms, oil gas leaching liquid-column height mostly only tens meters to several
Hundred meters, top surface is soaked to well head from oil gas, the time that drills on stratum increases, and cave-in degree increases, the theoretical pit shaft with reality
Difference in volume is increased.In the oil gas immersion liquid post top side location of this basic calculation, certain deviation is certainly existed.
The content of the invention
Present invention aims to overcome that the deficiency of above-mentioned background technology, and a kind of Ascending Velocity For Oil ＆ Gas computational methods are provided.
Computational methods of the present invention can avoid theoretical calculation lagged time, actual measurement lagged time, top seriously cave in well section volume etc. because
The interference of element, is not caused to be influenceed by multiple start-stop pump in constructing, and eliminates drilling tool to the row of oil gas immersion liquid post for effect, and
Situ of drilling well is simple to operate, value convenient, data are true and reliable.
To achieve the above object, Ascending Velocity For Oil ＆ Gas computational methods provided by the present invention, comprise the following steps：
1) determine to show the time started and terminate the time：According to gas detection logging chromatogram, curve is shown using total hydrocarbon, it is determined that
The display starting point and terminating point of oil gas immersion liquid post, then correspond to the two point determination display time starteds t1With termination time t2；
2) pumpage is determined：The real-time pumpage data recorded according to comprehensive logging instrument, it is determined that being shown out corresponding to total hydrocarbon
Time beginning t1To termination time t2Pumpage Q；
3) hole diameter is determined：According to the real casing programme data bored, oil gas immersion liquid post correspondence hole diameter R is chosen；
4) oil gas leaching liquid-column height is calculated：Well head is returned out out of pit shaft according to oil gas immersion liquid post, its volume is substantially invariable
Principle, the volume V of well head is returned out by calculating oil gas immersion liquid post, reverse to calculate oil gas leaching liquid-column height H in pit shaft；
5) Ascending Velocity For Oil ＆ Gas is calculated：According to oil gas leaching liquid-column height H and drilling fluid quiescent time T in pit shaft, calculate
Ascending Velocity For Oil ＆ Gas P, P=H ÷ T.
Further, the step 4) in, the oil gas immersion liquid post is as follows in the volume V of well head calculation formula：
V=Q × (t2﹣ t1)
Wherein：V is the volume for returning out well head, unit：Cubic meter；t1To return out the well head time started；t2It is whole to return out well head
Only time.
Further, the step 4) in, oil gas leaching liquid-column height H calculation formula is as follows in the pit shaft：
H=V ÷【(R÷2)2×3.14】
Wherein：H is that oil gas soaks liquid-column height, unit：Rice；R is oil gas immersion liquid post correspondence hole diameter, unit：Rice.
Further, the step 5) in, Ascending Velocity For Oil ＆ Gas P calculation formula is as follows：
P=H ÷ T
Wherein：P is that oil gas soaks upwelling speed, unit：M/h；T is drilling fluid quiescent time, unit：Hour.
Compared with prior art, there is following advantage in the present invention：
First, the Ascending Velocity For Oil ＆ Gas computational methods of the present invention, the foothold of calculating by traditional oil gas immersion liquid capital
Face is between well head, changing between the oil-gas Layer buried depth of oil gas immersion liquid capital face to bottom, it is to avoid to oil gas immersion liquid capital face
To the complicated calculations of annular space volume between well head, calculating process is simplified.
Second, the Ascending Velocity For Oil ＆ Gas computational methods of the present invention, the cumbersome operation for the field measurement lagged time that goes to have disappeared, province
The calculating of theoretical lagged time is gone, the multiple segmentation without conventional method under multiple start-stop pump condition is calculated, and improves scene
Well logging operating efficiency.
Third, the Ascending Velocity For Oil ＆ Gas computational methods of the present invention, avoid oil gas immersion liquid capital face to the borehole wall between well head
Cave in and calculating is significantly affected, eliminate drilling tool row in Traditional calculating methods and oil gas immersion liquid post is disturbed for effect, improve
The accuracy rate of calculating.
Brief description of the drawings
Fig. 1 is that total hydrocarbon shows beginning and terminates schematic diagram；
Fig. 2 is that oil gas soaks liquid-column height and hole diameter schematic diagram；
Fig. 3 is that oil gas immersion liquid post is replaced schematic diagram by drilling tool row.
Embodiment
Describe the performance of the present invention in detail with reference to embodiment, but they do not constitute limitation of the invention,
It is only for example.Simultaneously by illustrating that advantages of the present invention will become clearer and be readily appreciated that.
Present embodiment carries out value and calculating according to situ of drilling well workflow, and implementation process comprises the following steps：
1) determine to show the time started and terminate the time：
As shown in figure 1, according to gas detection logging chromatogram, using total gas curve, determining the display starting point of oil gas immersion liquid post
K, display terminating point Z, the time of correspondence K, Z point is display time started t1, display termination time t2；
2) pumpage is determined：
The real-time pumpage data recorded according to comprehensive logging instrument, it is determined that showing the time started to showing end corresponding to total hydrocarbon
The only pumpage Q of time；
3) hole diameter is determined：
According to casing programme data, oil gas immersion liquid post correspondence hole diameter R is chosen；
4) oil gas leaching liquid-column height is calculated：
Well head is returned out out of pit shaft according to oil gas immersion liquid post, the substantially invariable principle of its volume, by calculating oil gas immersion liquid
Post well head volume V,
V=Q × (t2﹣ t1)。
Wherein：
V is the volume for returning out well head, unit：Cubic meter.
t1To return out the well head time started.
t2The time is terminated to return out well head.
Calculate the height H of oil gas immersion liquid post in pit shaft；
H=V ÷【(R÷2)2×3.14】
Wherein：
H is that oil gas soaks liquid-column height, unit：Rice.
R is oil gas immersion liquid post hole diameter, unit：Rice.
5) Ascending Velocity For Oil ＆ Gas is calculated：
According to oil gas leaching liquid-column height H and drilling fluid quiescent time T in pit shaft, Ascending Velocity For Oil ＆ Gas is calculated, its formula
It is as follows：
P=H ÷ T
Above formula develops into：P=0.785 × (t2﹣ t1)×Q÷R2÷T
Wherein：P is that oil gas soaks upwelling speed, unit：M/h；t1For the time started；t2To terminate the time；Q arranges for pump
Amount, unit：Cube m/h；R is oil gas immersion liquid post correspondence hole diameter, unit：Rice；T is drilling fluid quiescent time, unit：It is small
When.
As shown in Fig. 2 before drilling tool tripping in oil gas immersion liquid post, oil gas immersion liquid post i in pit shaft, oil gas leaching liquid-column height H, oil
Gas immersion liquid post correspondence hole diameter R.As shown in figure 3, after drilling tool d tripping in oil gas immersion liquid posts j, by drilling tool, row replaces rear distortion oil gas immersion liquid
Pillar height degree h, compared with Fig. 2, it can be seen that the degree of accuracy calculated using computational methods of the present invention is high.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (4)
1. a kind of Ascending Velocity For Oil ＆ Gas computational methods, it is characterised in that comprise the following steps：
1) determine to show the time started and terminate the time：According to gas detection logging chromatogram, curve is shown using total hydrocarbon, oil gas is determined
The display starting point and terminating point of immersion liquid post, then correspond to the two point determination display time starteds t1With termination time t2；
2) pumpage is determined：The real-time pumpage data recorded according to comprehensive logging instrument, it is determined that when showing beginning corresponding to total hydrocarbon
Between t1To termination time t2Pumpage Q；
3) hole diameter is determined：According to the real casing programme data bored, oil gas immersion liquid post hole diameter R is chosen；
4) oil gas leaching liquid-column height is calculated：According to oil gas immersion liquid post out of pit shaft to returning out well head, the substantially invariable original of its volume
Then, the volume V of well head is returned out by calculating oil gas immersion liquid post, it is reverse to calculate the original height H in pit shaft of oil gas immersion liquid post；
5) Ascending Velocity For Oil ＆ Gas is calculated：According to oil gas leaching liquid-column height H and drilling fluid quiescent time T in pit shaft, oil gas is calculated
Upwelling speed P.
2. Ascending Velocity For Oil ＆ Gas computational methods according to claim 1, it is characterised in that the step 4) in, the oil
The calculation formula for the volume that gas immersion liquid post returns out well head is as follows：
V=Q × (t2﹣ t1)
Wherein：
V is the volume for returning out well head, unit：Cubic meter.
t1To return out the well head time started.
t2The time is terminated to return out well head.
3. Ascending Velocity For Oil ＆ Gas computational methods according to claim 1, it is characterised in that the step 4) in, the well
Oil gas leaching liquid-column height H calculation formula is as follows in cylinder：
H=V ÷【(R÷2)2×3.14】
Wherein：
H is that oil gas soaks liquid-column height, unit：Rice.
R is oil gas immersion liquid post hole diameter, unit：Rice.
4. Ascending Velocity For Oil ＆ Gas computational methods according to claim 1, it is characterised in that the step 5) in, on oil gas
The calculation formula for altering speed P is as follows：
P=H ÷ T
Wherein：P is that oil gas soaks upwelling speed, unit：M/h；T is drilling fluid quiescent time, unit：Hour.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710419918.3A CN107066768A (en) | 2017-06-06 | 2017-06-06 | Ascending Velocity For Oil ＆ Gas computational methods |
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| CN201710419918.3A CN107066768A (en) | 2017-06-06 | 2017-06-06 | Ascending Velocity For Oil ＆ Gas computational methods |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112302621A (en) * | 2020-10-20 | 2021-02-02 | 中国石油集团渤海钻探工程有限公司 | Method for calculating corrected oil gas channeling time in after-effect logging |
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| US20140209384A1 (en) * | 2013-01-31 | 2014-07-31 | Chevron U.S.A. Inc. | Method and system for detecting changes in drilling fluid flow during drilling operations |
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2017
- 2017-06-06 CN CN201710419918.3A patent/CN107066768A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140209384A1 (en) * | 2013-01-31 | 2014-07-31 | Chevron U.S.A. Inc. | Method and system for detecting changes in drilling fluid flow during drilling operations |
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Non-Patent Citations (3)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112302621A (en) * | 2020-10-20 | 2021-02-02 | 中国石油集团渤海钻探工程有限公司 | Method for calculating corrected oil gas channeling time in after-effect logging |
| CN112302621B (en) * | 2020-10-20 | 2022-03-11 | 中国石油集团渤海钻探工程有限公司 | Method for calculating corrected oil gas channeling time in after-effect logging |
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