CN105545302B - A kind of oil/gas well wellhead sampling method - Google Patents
A kind of oil/gas well wellhead sampling method Download PDFInfo
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- CN105545302B CN105545302B CN201610046145.4A CN201610046145A CN105545302B CN 105545302 B CN105545302 B CN 105545302B CN 201610046145 A CN201610046145 A CN 201610046145A CN 105545302 B CN105545302 B CN 105545302B
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- 238000005070 sampling Methods 0.000 title claims abstract description 92
- 238000000034 method Methods 0.000 title claims abstract description 40
- 239000000523 sample Substances 0.000 claims abstract description 118
- 239000012530 fluid Substances 0.000 claims abstract description 63
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 238000004458 analytical method Methods 0.000 claims abstract description 17
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000009827 uniform distribution Methods 0.000 abstract description 2
- 230000004069 differentiation Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/086—Withdrawing samples at the surface
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of oil/gas well wellhead sampling methods.The formation fluid that this method will need in the horizontal direction be flowed by sampling equipment, perpendicular flow is become by sampling equipment, pass through a filtering mixing arrangement in vertical direction, the fluid of imperfect flow is realized into more uniform distribution, flowing, after Uniform Flow, using telescopic sample probe, a certain amount of sample is respectively taken in the different position of circulation passage, until filling special sample bottle；Under conditions of wellhead sampling condition meets laboratory PVT analyses, the sample taken using this kind of sampling method, downhole fluid sample can be substituted completely, sample time is arranged in during asking production steady flow, while does not influence asking for for Oil ＆ Gas Productivity data, compared with downhole fluid sampling method, this kind of method does not occupy the activity duration additionally, and without the special sampling instrument of tripping in, the activity duration of whole mouth well is saved, has reduced operating cost.
Description
Technical field
It is more particularly to a kind of to be used for oil/gas well wellhead sampling method the present invention relates to a kind of sampling method.
Background technology
The physical parameter of formation fluid is evaluation oil-gas reservoir reserves very important parameter, which is by laboratory
It carries out PVT analyses to formation fluid sample to obtain, therefore the quality of PVT analysis specimen in use directly decides the hydrocarbon reservoir evaluation
Correctness.
Have more mature downhole fluid sampling method and sampling technique now, when being sampled using downhole fluid, it is necessary to
By dedicated sampling instrument G.I.H, and certain activity duration is occupied, other operations, institute can not be carried out during sampling
It is larger that this expense used is sampled with existing downhole fluid.Existing wellhead sampling method is also more mature, but samples mesh
Be not configured to laboratory PVT analysis, so can not meet laboratory PVT analysis requirement.
The existing sample for delivering laboratory progress PVT analyses is all downhole fluid sample, is by dedicated sampling instrument
Downhole fluid sampling is carried out, existing wellhead sample is used only as conventional analysis or the sample for PVT analyses, and cannot be direct
It is analyzed for PVT.
Existing wellhead sample does not have to the deficiency for the reason for PVT is analyzed being its sampling method, and wellhead sampling has two at present
Kind method：1st, when yield is stablized relatively, directly connecting pipeline is sampled from the manifold of ground of well head；2nd, stabilization asks term
Between, fluid by separator carry out in separator sample tap after air-liquid separation the sampling of air-liquid respectively.Both modes
Sample sample when the wellhead sample taken is only used for conventional analysis or is analyzed as PVT.When both modes sample
Shortcoming has：First way sample when, do not consider gravitational differentiation of the formation fluid in the pipeline of level ground during steady flow and
The influence of pipe friction, a kind of flowing heterogeneous is presented in formation fluid when being flowed in manifold of ground, so directly on ground
It is sampled in manifold, the gas-oil ratio of samples taken differs larger with the real gas-oil ratio of formation fluid downhole, without representativeness.The
When two kinds of modes sample, air-liquid is individually separately sampled, when using sample, can only be artificially by a certain proportion of air-liquid sample
Product are mixed, and bigger is differed with the real gas-oil ratio of formation fluid downhole, so the sample of lab analysis can only be used as, and
PVT analyses can not individually be carried out.
The content of the invention
It is an object of the invention to provide a kind of oil/gas well wellhead sampling method, by using sampling side of the present invention
The resulting fluid sample that method obtains can meet laboratory PVT analyses more really close to the fluid sample of shaft bottom single phase
It is required that downhole fluid sample can be substituted in the oil/gas well of certain condition carries out PVT analyses, this save and carry out underground stream
Sampling instrument and sample time used in body sampling, the saving activity duration is reached, has reduced the purpose of operating cost.
Another object of the present invention is that the sample size that sampling process middle probe is made to be gathered in horizontal each position is equal, from
And the sample of sampling is more uniformly distributed, accurately to reflect the performance parameter of sample.
To achieve the above object, the present invention adopts the following technical scheme that, one kind is used for oil/gas well wellhead sampling method, including
Following steps：
A. when connecting oil/gas well ground flow pipeline, sampler is connected to ground line using oily nonyl or form of flanges
In remittance；
B. when formation fluid is by ground flow pipeline, fluid enters the sampler by sampler entrance；
C. fluid first passes around the filtering mixing portion of sampler, and push rod control through hole and filter screen are in different positions
It puts；
When d. without sampling, push rod slides to the right, and through hole is made to be in the center of filtering mixing portion, and fluid passes through through hole
Outflow；
E. before sampling, push rod is slided to the left, filter screen is made to be in the center of filtering mixing portion, non-uniform fluid exists
By that can be mixed after filter screen, become more uniformly to flow；
F. in sampling process, the fluid after filtering is by the sampling part of sampler, and sample probe is respectively in fluid stream
Multiple and different positions carries out the sampling to fluid in the pipeline of warp；
G. sampled fluid is sent to the special sample bottle of sampling by the control device of the connection on the outside of sample probe；
H. after sampling, sample probe is withdrawn, push rod slides to the right, and through hole is in the center of filtering mixing portion.
Preferably, mixed power plant is further included, push rod is driven to slide, through hole and filter screen is controlled to move horizontally.
Preferably, sampling power set are further included, sample probe is promoted to carry out telescopic slide.
Preferably, control device can monitor samples taken liquid volume.
Preferably, online detection instrument is further included, is used for real-time physical properties of fluids analysis.
Preferably, sample probe can be arranged on same circulation passage, and the different position of same plane of structure is sampled.
Preferably, it is sampled in the vertical channel of the sampler.
Preferably, it is all in the vertical fluid flow passageway of sampler to filter mixing portion and the position of sampling part
In.
Preferably, the sample probe is started to move into pipeline from the initial position for being located at circulation passage tube wall, and
And the speed v of the probe movement meets with displacement x：
Wherein, u is sample flow rate；X is axis of abscissas position, and abscissa origin is a bit on tube wall；R is pipe radius,
umaxFor the flow velocity at pipeline center.
The beneficial effects of the invention are as follows：Under conditions of wellhead sampling condition meets laboratory PVT analyses, taken using this kind
The sample that quadrat method is taken can substitute downhole fluid sample completely, and sample time is arranged in during asking production steady flow, simultaneously
Asking for for Oil ＆ Gas Productivity data is not influenced, compared with downhole fluid sampling method, this kind of method does not occupy the activity duration additionally,
And without the special sampling instrument of tripping in, the activity duration of whole mouth well is saved, has reduced operating cost.
Description of the drawings
Fig. 1 is oil/gas well wellhead sampling method schematic diagram of the present invention.
In figure：Entrance 101, fluid flow direction 102, filtering mixing portion 103, through hole 104, filter screen 105, push rod
106th, mixed power plant 107, sampling part 108, sample probe 109, sampling power set 110, sampling control equipment 111,
Outlet 112.
Specific embodiment
Invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification word
It can implement according to this.
As shown in Figure 1, a kind of oil/gas well wellhead sampling method, this method will need in the horizontal direction be flowed by sampling equipment
Formation fluid, perpendicular flow is become by sampling equipment, in vertical direction by a filtering mixing arrangement, by non-uniform flow
Dynamic fluid realizes more uniform distribution, flowing, after Uniform Flow, using telescopic sample probe, in circulation passage
Different position respectively take a certain amount of sample, until fill special sample bottle, the sampling equipment includes：Entrance 101, in pipeline
One end, the other end form entrance 101,101 pipeline of entrance and filtering by conduit coupling and another pipeline vertical connection
Mixing portion 103 is fixedly connected, comprising one for 105 or so the shifting of through hole 104 and filter screen in the filtering mixing portion 103
Dynamic space, 105 horizontal connection of the through hole 104 and filter screen, 105 other end of filter screen are fixedly connected with push rod 106, push rod
106 mixed power plant 107 by being fixedly connected drives through hole 104 and filter screen 105 to move horizontally, and makes through hole 104 or mistake
Strainer 105 is in filtering mixing portion center, and is in pipe joint on same vertical line；Filter 103 lower section of mixing portion
For sampling part 108, the sample probe 109 in pipeline is probeed into it includes one end, sample probe 109 is filled by connecting sampling power
Putting 110 drives, it is moved left and right, 109 other end of sample probe connection sampling control equipment 111；Outlet 112 is located at entire
The bottom of sampling equipment.
A kind of oil/gas well wellhead sampling method, it includes following steps：
A. when connecting oil/gas well ground flow pipeline, sampler is connected to ground line using oily nonyl or form of flanges
In remittance；
B. when formation fluid is by ground flow pipeline, fluid by sampler entrance 101 into device, and according to
Arrow 102 indicates direction flowing；
C. fluid first passes around the filtering mixing portion 103 of sampler, mixed power plant 107 drive push rod 106 into
Row slides control through hole 104 and filter screen 105 carries out left and right horizontal movement, and through hole 104 and filter screen 105 is made to be in different positions
It puts；
When d. without sampling, push rod 106 slides to the right, and through hole 104 is made to be in the center of filtering mixing portion 103, stream
Body is flowed out by through hole 104, and fluid will not be had any influence by filtering mixing portion 103 at this time.
Push rod 106 need to the left be slided before being sampled when e. sampling, filter screen 105 is made to be in filtering mixing portion
Center, non-uniform fluid can be mixed after by filter screen, become more uniformly to flow.
When f. sampling, when fluid after filtering is by the sampling part 108 of sampler, the sample probe 109 of the part
Telescopic slide is carried out under the promotion of sampling power set 110, position different in the pipeline flowed through respectively in fluid can be completed
It puts A, B, C, D and carries out sampling to fluid；
G. the connection of control device 111 that sample probe 109 is connected by outside samples special sample bottle, and sampled fluid is by taking
Sample probe is sent in the special sample bottle of sampling, and control device 111 has the function of that monitoring samples taken liquid volume prevents from sampling
Liquid overflows.After taking a certain amount of sample a position, information is fed back to sampling power set 110 by control device 111, is made
It promotes sample probe 109 to convert different positions and is sampled, until a sample finishes, if necessary to multiple samples
Product are sampled using same flow.
H. after sampling, sample probe 109 is withdrawn, push rod 106 slides to the right, and through hole 104 is in filtering mixing portion
103 center.
In another embodiment, a kind of oil/gas well wellhead sampling method of the present invention, in the vertical of sampler during sampling
Be sampled in passage, i.e., filtering mixing and sampling position be all in vertical fluid flow passageway, avoid fluid by
In gravitational differentiation and caused by influence.Filter screen 105, which has, breaks original fluid flow state, then makes gas in fluid, oil
The more uniform function of ratio, sample probe 109 can horizontally slip under the drive of sampling power set 110, can be same
The different position of the same plane of structure of circulation passage is sampled.
In another embodiment, a kind of oil/gas well wellhead sampling method of the present invention, control device 111 are special except being directly connected to
Outer with sample bottle sampling, passage is also attached to line detection device, carries out real-time physical properties of fluids analysis to sampled fluid, online
Fixed sample time automatic sampling can be also set as needed convenient for being detected to the sampled fluid of different periods in detection device.
In another embodiment, sample flow channels section is rounded in sampling part 108, since sample has centainly
Viscosity, it is different when on the section so as to flow through the speed of the sample in a certain section of circulation passage, at tube wall, by
In the viscous effect of sample and tube wall, flow velocity is smaller, and the flow velocity on tube wall is zero, the moon close to center, due to fluid and tube wall this
Kind viscous effect is smaller, and flow velocity is bigger, and the flow velocity of pipeline center reaches maximum.Assuming that velocity flow profile meets in pipeline：
Wherein, u is flow velocity；X is axis of abscissas position, and abscissa origin is a bit on tube wall；R is pipe radius, umaxFor
Flow velocity at pipeline center.
By above formula, it will also be appreciated that, the flow velocity on tube wall is zero, and the flow velocity of pipeline center reaches maximum.Using probe sampling
In the process, it is equal to meet the amount sampled at each position of probe abscissa, is more uniformly distributed so as to reach sample.In satisfaction
State requirement, it is necessary to the translational speed of sampling process middle probe meets some requirements, i.e., when flow velocity is smaller in blocking the way, probe
Speed is also relatively small, so that probe residence time at this is longer, and when flow velocity is larger in pipeline, probe is relatively
Greatly, so as to which probe residence time at this is shorter, be finally reached in each position, the amount for the sample that probe is collected it is identical
's.
It is assumed that at axis of abscissas is x, the speed of probe movement is v, then is closing on the region that a width is Δ x at x
On, the speed of probe movement is Δ v, and probe residence time in the region isProbe is in the area that each width is Δ x
The amount sampled on domain is equal, therefore
Wherein, η constants.
Integration obtains
I.e. under the conditions of the speed v moved when the probe meets above formula with displacement x, that is, it is every in abscissa to realize probe
The equal purpose of the amount of sampling at one position.
Although the embodiments of the present invention have been disclosed as above, but its be not restricted in specification and embodiment it is listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, it is of the invention and unlimited
In specific details.
Claims (9)
- A kind of 1. oil/gas well wellhead sampling method, which is characterized in that comprise the following steps：A. when connecting oil/gas well ground flow pipeline, sampler is connected to manifold of ground using oily nonyl or form of flanges In；B. when formation fluid is by ground flow pipeline, fluid enters the sampler by sampler entrance；C. fluid first passes around the filtering mixing portion of sampler, and push rod control through hole and filter screen are in different positions；When d. without sampling, push rod slides to the right, and through hole is made to be in the center of filtering mixing portion, and fluid passes through through hole stream Go out；E. before sampling, push rod is slided to the left, filter screen is made to be in the center of filtering mixing portion, non-uniform fluid is passing through It can be mixed after filter screen, become more uniformly to flow；F. in sampling process, fluid after filtering by the sampling part of sampler, what sample probe flowed through respectively in fluid Multiple and different positions carries out the sampling to fluid in pipeline；G. sampled fluid is sent to the special sample bottle of sampling by the control device of the connection on the outside of sample probe；H. after sampling, sample probe is withdrawn, push rod slides to the right, and through hole is in the center of filtering mixing portion.
- 2. oil/gas well wellhead sampling method according to claim 1, it is characterised in that：Mixed power plant is further included, Push rod is driven, which to slide, controls through hole and filter screen to move horizontally.
- 3. oil/gas well wellhead sampling method according to claim 1 or 2, it is characterised in that：Sampling power set are further included, It promotes sample probe to carry out telescopic slide.
- 4. oil/gas well wellhead sampling method according to claim 1, it is characterised in that：Control device can be monitored and sampled Product liquid volume.
- 5. the oil/gas well wellhead sampling method according to claim 1 or 4, it is characterised in that：Further include online detection instrument, It is used for real-time physical properties of fluids analysis.
- 6. oil/gas well wellhead sampling method according to claim 3, it is characterised in that：Sample probe can be arranged on same Circulation passage, the different position of same cross section are sampled.
- 7. oil/gas well wellhead sampling method according to claim 1, it is characterised in that：The vertical channel of the sampler Inside it is sampled.
- 8. the oil/gas well wellhead sampling method according to claim 1 or 7, it is characterised in that：Filter mixing portion and sampling Partial position is all in the vertical fluid flow passageway of sampler.
- 9. oil/gas well wellhead sampling method according to claim 6, it is characterised in that：The sample probe is by being located at circulation The initial position of passage tube wall starts to move into pipeline, and the speed v of probe movement meets with displacement x：It is assumed that at axis of abscissas is x, the speed of probe movement is v, then is on the region of Δ x closing on a width at x, takes The speed of sample probe movement is Δ v, and probe residence time in the region isWherein, u is sample flow rate；X is axis of abscissas position, and abscissa origin is a bit on tube wall；R is pipe radius, umaxFor Flow velocity at pipeline center.
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| CN201610046145.4A CN105545302B (en) | 2016-01-25 | 2016-01-25 | A kind of oil/gas well wellhead sampling method |
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| CN106651611B (en) * | 2016-09-29 | 2019-11-19 | 中法渤海地质服务有限公司 | It is a kind of to survey entry data to the corrected method of outlet data using well logging gas |
| CN109444005A (en) * | 2018-12-26 | 2019-03-08 | 江苏新宏大集团有限公司 | Acid mist droplet measurement device and detection method |
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| CN201843610U (en) * | 2010-11-04 | 2011-05-25 | 中国石油天然气股份有限公司 | Gas sampler for oil gas well head |
| CN202451149U (en) * | 2012-02-02 | 2012-09-26 | 中国石油化工股份有限公司 | Gas sampling device for oil-gas well |
| CN203223218U (en) * | 2013-04-23 | 2013-10-02 | 中法渤海地质服务有限公司 | Underground fluid sampler test simulation device |
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| CN104790946A (en) * | 2015-03-12 | 2015-07-22 | 中国石油天然气股份有限公司 | Oil well wellhead sampling device |
| CN204924711U (en) * | 2015-07-14 | 2015-12-30 | 中法渤海地质服务有限公司 | Be applied to exploratory well formation testing's well head sampling device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7665534B2 (en) * | 2006-01-11 | 2010-02-23 | Besst, Inc. | Zone isolation assembly for isolating and testing fluid samples from a subsurface well |
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2016
- 2016-01-25 CN CN201610046145.4A patent/CN105545302B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7775276B2 (en) * | 2006-03-03 | 2010-08-17 | Halliburton Energy Services, Inc. | Method and apparatus for downhole sampling |
| CN201843610U (en) * | 2010-11-04 | 2011-05-25 | 中国石油天然气股份有限公司 | Gas sampler for oil gas well head |
| CN202451149U (en) * | 2012-02-02 | 2012-09-26 | 中国石油化工股份有限公司 | Gas sampling device for oil-gas well |
| CN203223218U (en) * | 2013-04-23 | 2013-10-02 | 中法渤海地质服务有限公司 | Underground fluid sampler test simulation device |
| CN104514556A (en) * | 2013-09-29 | 2015-04-15 | 天津吉诺达科技开发有限公司 | Novel oil and gas wellhead gas sampling pipe |
| CN104790946A (en) * | 2015-03-12 | 2015-07-22 | 中国石油天然气股份有限公司 | Oil well wellhead sampling device |
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