CN104481527B - Horizontal well underground sectional sampling control method - Google Patents
Horizontal well underground sectional sampling control method Download PDFInfo
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- CN104481527B CN104481527B CN201410736311.4A CN201410736311A CN104481527B CN 104481527 B CN104481527 B CN 104481527B CN 201410736311 A CN201410736311 A CN 201410736311A CN 104481527 B CN104481527 B CN 104481527B
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- 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
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- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention particularly provides a horizontal well underground sectional sampling control method, which comprises the following steps: 1) calculating the drainage period of the fluid in the shaft and determining the sampling time; 2) determining a sampling mode; 3) a downhole sampling test pipe column is put into the test interval; 4) completing underground sampling through the sampler according to the sampling mode determined in the step 2); 5) after the sampling of the sampler is finished, the testing pipe column is lifted out, and the fluid of each sampler is collected; 6) and (6) analyzing the sample. The underground sampler is brought into a target layer by using the oil pipe, the packer seals a test layer section, and the multi-section sampling is completed by one time of pipe column, so that compared with the ground sampling, the underground sampler has the advantages of strong sample representativeness, low test cost and high test efficiency; in addition, the method can be applied to taking out the actual fluid of the stratum when the water outlet position of the horizontal well with high and medium water content can not be judged, finding out the water outlet layer section through ground test analysis, and further adopting the measures of water control and oil stabilization.
Description
Technical field
The invention belongs to oil extraction in oil field development technique field, and in particular to sectional sampling controlling party under a kind of Horizontal Well
Method, is mainly used in horizontal well water exploration and formation fluid property analysis etc..
Background technology
As horizontal well development scale constantly expands, oil well is extended with the development time improving oil recovery rate and facing simultaneously
Oil well productivity declines rapidly after the problem of water breakthrough, water breakthrough, needs development water detection measure badly, could targetedly implement water blockoff.
Traditional horizontal well machinery water detection technology uses packer sealing test zone, is controlled to produce by derailing switch, found
Water exit position.
Looked for as Chinese patent CN202788638U discloses a kind of cased hole completion multistage pressure break horizontal well multistage subsection and given up
Water pipe post, including：Multistage searching pipe column component, is located in the horizontal segment sleeve pipe of horizontal well, including set gradually from the bottom to top
Seal area between plug, spaced multiple Y441 types packers, back-off sub, two adjacent Y441 type packers
Domain forms a linkage section；Safety joint and derailing switch are connected with turn in each linkage section；Flow string component includes taking out
At oil pump, oil pump plunger piston, sucker rod, oil well pump top connected pipes to horizontal well well head, oil pump plunger piston connection oil pumping
Bar, the upper end of sucker rod is connected with the ground oil pumper.The invention realizes one-trip string and completes each interval of horizontal well
Water detection is tested, and water detection testing efficiency is high, and test zone is unrestricted, can meet the segmentation water detection function of water under high pressure horizontal well, it is to avoid
Flow string wriggling, improves the accuracy and tubing string sealing reliability of water detection test.
And for example Chinese patent CN202596684U discloses a kind of casing tube well-completion horizontal well multistage subsection and asks production, water detection test
Process pipe string, it includes the multistage intelligent derailing switch set gradually, between intelligent switch device described in each adjacent two respectively
It is provided with a safety joint and a packer successively by oil pipe, wherein, the packer is Y341 or Y441 type packers；Its
In, on the free end of intelligent switch device, a taper plug is being connected with by oil pipe described in the first order.The pressure-bearing kept a grip on difference is strong
Degree is high, and functional reliability is good, and production, water detection test jobs are asked in the integration segmentation for being adapted to many pay interval horizontal wells.
However, the method in above-mentioned patent must can all be sampled after formation fluid discharge pit shaft, for transformation hop count
More horizontal well, measure period is long.
In addition, conventional downhole sampler is most of by cable or steel wire tripping in sampler at present, mainly using clock
The closed forms such as control, wall built-up and hammering, such sampler enters well control method and is primarily present following deficiency：
（1）Horizontal well in segments control sampling can not be carried out；
（2）Sampling control method is complicated, and long construction period, testing cost is higher；
（3）Oil well is not produced normally during sampling and testing, and sampling accuracy is relatively low.
The content of the invention
The purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art there is provided sectional sampling controlling party under a kind of Horizontal Well
Method, realizes the quick water detection technique of underground sectional sampling when horizontal well is normally produced, and then chemically examines aqueous by ground, finds out
Water position.
Therefore, the invention provides sectional sampling control method under a kind of Horizontal Well, comprising the following steps：
1) the wellbore fluids discharge opeing phase is calculated, sample time is determined；The wellbore fluids discharge opeing phase=horizontal well length × Horizontal Well
The cylinder daily lifting rate of sectional area/pit shaft；
2) sampling mode is determined, test interlayer pressure difference is more than 2MPa if each test zone is smaller than 100m or each, adopts
With segmentation successively sampling mode, if conversely, each test zone spacing is more than or equal to 100m or respectively test interlayer pressure difference is less than or equal to
2MPa, then using segmentation while sampling mode；
3) the sampling and testing tubing string under lower going-into-well into test zone；By oil pipe by under downhole sampler, packer concatenation
Enter test zone, and opened test zone card by packer, each multiple downhole samplers of test zone tripping in；
4) according to step 2) the middle sampling mode determined, well sampling is completed by sampler；
5) after sampler in all test zones completes sampling, act test string, collect the fluid of each sampler；
6) sample analysis；To the fluid of each sampler of collection by chemically examining its moisture content and analysis water type, water outlet is found
Position.
Sampling mode is only sampled to be daily to a test zone successively for above-mentioned segmentation, and the sampling of the test zone
Device point is not sampled successively in the same time.
Sampling mode is that one day jack per line sampler to each test zone is sampled in the same time simultaneously for above-mentioned segmentation, is completed within one day
The sampling of all test zones.
Above-mentioned steps 3) in each test zone the number of tripping in sampler be 3.
Above-mentioned steps 4) carry out well sampling before the fluid being stored in pit shaft is drained.
Beneficial effects of the present invention：Sectional sampling control method under this Horizontal Well that the present invention is provided, utilizes oil pipe
Bring downhole sampler into target zone, packer sealing test zone, one-trip string completes multistage sampling；With ground sample phase
Than the sample representativeness of the invention obtained is strong, testing cost is low, testing efficiency is high；In addition, present invention can apply to middle High water cut
When horizontal well can not judge water exit position, stratum real fluid is taken out, by ground assay, water exit interval is found, enters
And take water and oil control measure.
The present invention is described in further details below with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is sectional sampling control method flow chart under Horizontal Well of the present invention.
Fig. 2 is segmentation sampling mode schematic diagram successively in horizontal well underground in the present invention.
Fig. 3 is segmentation sampling mode schematic diagram simultaneously in horizontal well underground in the present invention.
Embodiment
Embodiment 1：
In order to overcome the deficiencies in the prior art, the quick water detection of underground sectional sampling when horizontal well is normally produced is realized, this
Embodiment provides sectional sampling control method under a kind of Horizontal Well as shown in Figure 1, Figure 2 and Figure 3, comprises the following steps：
1) the wellbore fluids discharge opeing phase is calculated, sample time is determined；The wellbore fluids discharge opeing phase=horizontal well length × Horizontal Well
The cylinder daily lifting rate of sectional area/pit shaft；
2) sampling mode is determined, test interlayer pressure difference is more than 2MPa if each test zone is smaller than 100m or each, adopts
With segmentation successively sampling mode, if conversely, each test zone spacing is more than or equal to 100m or respectively test interlayer pressure difference is less than or equal to
2MPa, then using segmentation while sampling mode；
3) the sampling and testing tubing string under lower going-into-well into test zone；By oil pipe by under downhole sampler, packer concatenation
Enter test zone, and opened test zone card by packer, each multiple downhole samplers of test zone tripping in；
4) according to step 2) the middle sampling mode determined, well sampling is completed by sampler；
5) after sampler in all test zones completes sampling, act test string, collect the fluid of each sampler；
6) sample analysis；To the fluid of each sampler of collection by chemically examining its moisture content and analysis water type, water outlet is found
Position.
The invention brings downhole sampler into target zone using oil pipe, and packer sealing test zone, one-trip string is completed
Multistage is sampled, and sample representativeness is strong compared with ground sample, testing cost is low, testing efficiency is high；In addition, present invention can apply to
When middle High water cut horizontal well can not judge water exit position, stratum real fluid is taken out, by ground assay, water outlet is found
Interval, and then take water and oil control measure.
Embodiment 2：
On the basis of embodiment 1, to ensure that sampling is accurate, downhole sampler is reliable, the step 3) in each test
The number of tripping in sampler is 3 in interval, on ground using day as chronomere, sets each downhole sampler and opens and closes
Time.
And sampling mode is only is sampled to a test zone daily successively for the segmentation, and the test zone takes
Sample device point is not sampled successively in the same time；It is described segmentation simultaneously sampling mode be one day jack per line sampler to each test zone simultaneously
Carve sampling, the sampling for completing all test zones in one day.
3 samplers of tripping in each test zone, numbering is 1. number sampler, 2. number sampler and 3. number sampler；
As shown in Fig. 2 the well of 100m or interlayer pressure difference more than 2MPa is smaller than for test zone, first to first layer test zone
Sampling, when 1. number sampler is sampled of first layer test zone, other samplers are in closed mode；Each test zone
Point 3 moment samplings in 3 samplers 1 day, after first layer test zone completes sampling, by first layer test zone to N
Layer test zone is daily sampled successively.
As shown in figure 3, it is more than or equal to the well of 100m or interlayer pressure difference less than or equal to 2MPa for test zone spacing, it is each to survey
1. number sampler is sampled examination interval simultaneously, and remaining sampler is in closed mode；Treat after the completion of 1. number sampler, each interval is 2.
Number sampler is sampled simultaneously again；Treat after the completion of 2. number sampler, 3. number sampler is sampled each interval simultaneously again, is completed in 1 day
All test zone samplings.
In addition, in order to ensure sampling is accurate, can also be in the step 4) carry out that before well sampling pit shaft will be stored in
In the fluid such as flushing fluid it is drained.
Embodiment 3：
The present embodiment by taking Changqing oilfields a bite horizontal well as an example to the present invention in underground sectional sampling control method carry out it is clear
Chu, it is fully described by.
Embodiment well is a bite pressure break horizontal well, 7 sections of fracturing reform, by analyzing flooding pattern and current mining by its stroke
It is divided into 5 sections of progress underground sectional sampling water detections.
Step 1)：Determine sample time；The hole deviation depth 3090m, horizontal section length 800m, casing inner diameter 124.26mm, should
The daily lifting rate of well is 4.5m3, by calculating the pit shaft discharge opeing phase for 8 days.
Step 2)：Determine sampling mode；Each test zone three downhole samplers of tripping in, due to each test zone of the well
Spacing is larger, and average distance uses segmentation sampling mode simultaneously more than 100m, the downhole sampler of each test zone open and
Shut-in time is set to：
（1）9th day 0 point, each test zone 1. a number sampler start sampling, 0:30 samplers are closed, and complete each section first
Sub-sampling；
（2）9th day 8 points, each test zone 2. a number sampler start sampling, 8:30 samplers are closed, and complete each section second
Sub-sampling；
（3）9th day 16 points, each test zone 3. a number sampler start sampling, 16:30 samplers are closed, and complete each section the
Three sub-samplings.
Step 3)：The sampling and testing tubing string under lower going-into-well into test zone；By oil pipe downhole sampler, packer etc.
Tool string connects tripping in test zone, and packers at different levels open test zone sealing card, each three undergrounds of test zone tripping in
Sampler.
Step 4)：Completion, which is opened, takes out；Opening well and making production, discharge opeing 8 days, the fluids such as the flushing fluid being stored in pit shaft are arranged on request
It is complete.
Step 5)：It is sampled by the sampling mode of determination；9th day by step 2) program set be sampled.
Step 6）：Act test string；Go out test string, the fluid of surface collection downhole samplers at different levels from 10th day.
Step 7)：Sample analysis is chemically examined；By sample for test moisture content and water type is analyzed, it is to find 1~specking of specking 4
Water position.
In summary, sectional sampling control method under this Horizontal Well that the present invention is provided, is taken underground using oil pipe
Sample device brings target zone, packer sealing test zone into, and one-trip string completes multistage sampling；Compared with ground sample, the present invention
The sample representativeness of acquirement is strong, testing cost is low, testing efficiency is high.
It is exemplified as above be only to the present invention for example, do not constitute the limitation to protection scope of the present invention, it is all
It is to be belonged to the same or analogous design of the present invention within protection scope of the present invention.
Claims (1)
1. sectional sampling control method under a kind of Horizontal Well, it is characterised in that：Comprise the following steps：
1) the wellbore fluids discharge opeing phase is calculated, sample time is determined；The wellbore fluids discharge opeing phase=horizontal well length × horizontal well pit shaft
The daily lifting rate of sectional area/pit shaft；
2) sampling mode is determined, test interlayer pressure difference is more than 2MPa if each test zone is smaller than 100m or each, uses and divides
Duan Yici sampling modes, if test interlayer pressure difference is less than or equal to 2MPa conversely, each test zone spacing is more than or equal to 100m or respectively,
Then using segmentation while sampling mode；
I.e.：100m is smaller than for test zone or interlayer pressure difference is more than 2MPa well, and first layer test zone is taken first
Sample, when 1. number sampler is sampled of first layer test zone, other samplers are in closed mode；The 3 of each test zone
Individual sampler divides 3 moment samplings in 1 day, after first layer test zone completes sampling, by first layer test zone to N
Layer test zone is daily sampled successively；
It is more than or equal to 100m for test zone spacing or interlayer pressure difference is less than or equal to 2MPa well, the 1. number sampling of each test zone
Device is sampled simultaneously, and remaining sampler is in closed mode；After the completion for the treatment of 1. number sampler, 2. number sampler is again simultaneously for each interval
Sampling；Treat after the completion of 2. number sampler, 3. number sampler is sampled each interval simultaneously again, and all test zones were completed in 1 day and are taken
Sample；
3) the sampling and testing tubing string under lower going-into-well into test zone；Downhole sampler, packer are concatenated tripping in and surveyed by oil pipe
Interval is tried, and is opened test zone card by packer, each multiple downhole samplers of test zone tripping in；The step 3)
In in each test zone the number of tripping in sampler be 3；
4) according to step 2) the middle sampling mode determined, well sampling is completed by sampler；The step 4) carry out underground
It is before sampling that the fluid being stored in pit shaft is drained；
5) after sampler in all test zones completes sampling, act test string, collect the fluid of each sampler；
6) sample analysis；To the fluid of each sampler of collection by chemically examining its moisture content and analysis water type, water level is found out
Put；
Sampling mode is only sampled to be daily to a test zone successively for the segmentation, and the sampler point of the test zone
Do not sample successively in the same time；
Sampling mode is that one day jack per line sampler to each test zone is sampled in the same time simultaneously for the segmentation, is completed within one day all
The sampling of test zone；
This method, brings downhole sampler into target zone, packer sealing test zone, one-trip string completes multistage using oil pipe
Sampling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410736311.4A CN104481527B (en) | 2014-12-05 | 2014-12-05 | Horizontal well underground sectional sampling control method |
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|---|---|---|---|
| CN201410736311.4A CN104481527B (en) | 2014-12-05 | 2014-12-05 | Horizontal well underground sectional sampling control method |
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| CN104481527B true CN104481527B (en) | 2017-11-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107304667A (en) * | 2016-04-21 | 2017-10-31 | 中国石油天然气股份有限公司 | Well completion pipe string |
| CN116733454B (en) * | 2023-08-01 | 2024-01-02 | 西南石油大学 | Intelligent water finding method for horizontal well |
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2014
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