CN108561120A - A method of test Oil ＆ Gas Productivity section - Google Patents
A method of test Oil ＆ Gas Productivity section Download PDFInfo
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- CN108561120A CN108561120A CN201711363981.6A CN201711363981A CN108561120A CN 108561120 A CN108561120 A CN 108561120A CN 201711363981 A CN201711363981 A CN 201711363981A CN 108561120 A CN108561120 A CN 108561120A
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- tracer
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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
Abstract
The invention discloses a kind of methods of test Oil ＆ Gas Productivity section, belong to oil/gas well development technique field.The method includes：According to formation porosity, reservoir temperature preset value and layering segment number, tracer number of species, label and dosage are determined；In separate stratum fracfturing or acidization to it is each layering section inject different labels tracer, and to after the completion of separate stratum fracfturing or acidification return drain carry out oil and gas and water from and sampling；According to the concentration of each tracer in sample, tracer production curve is generated；Each tracer production curve is fitted calculating, and calculates the yield of each interval according to test total output, generates Dynamic Productivity Calculation section and static production capacity section.The present invention is applicable in all kinds of oil gas well capacity section plane tests, has and is not take up well head, without Operating Pressure, is not restricted by pit shaft, testing tool and supporting operation equipment, and test data is accurate and the advantages that can carrying out continuous dynamic monitoring and tracer safety and environmental protection.
Description
Technical field
The present invention relates to oil/gas well development technique field, more particularly to a kind of method of test Oil ＆ Gas Productivity section.
Background technology
Oil ＆ Gas Productivity section plane test refers to the well logging side that each layering output oil gas water amount is provided in production of hydrocarbons well
Method can know the throughput contribution of each interval by this method, and the main productive layers section in the production process to known to, this is to test
The setting of the pilot production parameter and manufacturing parameter of block, reserves calculating and the establishment of development plan provide valid data and have where well
Significance.
The method of test Oil ＆ Gas Productivity section is at present：By production logging instrument inside pit shaft, every section of test
Production capacity section obtains every section of specific quantum of output.But there is following deficiency in this test method：
1) it needs to occupy well head and progress with pressure when testing, this can additionally increase the activity duration of production logging, and have
Certain security risk.
2) enter pit shaft logging tool by restrictions such as wellbore integrity, wellbore quality, well tracks, while also by
Production logging instrument and supporting operation equipment size, shape and length restrict, not only will appear it is not in place under logging tool and only
Part producing interval DATA REASONING can be completed, but also it is possible that is hampered, meets the down hole problems such as card, initiation underground is multiple
Miscellaneous affair event.
3) in production logging instrument tripping in pit shaft, the pressure system of pit shaft during normal production is destroyed, leads to the production of test
Going out interval data, there are large errors.
4) monitoring result of production logging instrument only represents flow regime when testing, and can not carry out continuous for a long time survey
Amount, institute's measured data is only the creation data of measurement time, cannot provide the creation data in continuous a period of time.
Invention content
In order to solve present in existing Oil ＆ Gas Productivity section plane test the production logging activity duration increase, easily by pit shaft or
The problems such as production logging instrument limits, safety difference and test data error is big, the present invention provides a kind of productions of test oil/gas well
The method of energy section, including：
According to formation porosity, reservoir temperature preset value and layering segment number, determine the number of species of tracer, label and
Dosage；
The tracer of different labels is injected to each layering section in separate stratum fracfturing or acidization, and to separate stratum fracfturing or acid
After the completion of change return drain carry out oil and gas and water from and sampling；
According to the concentration of each tracer in sample, tracer production curve is generated；
Each tracer production curve is fitted calculating, and binding test total output calculates the yield of each interval,
Generate Dynamic Productivity Calculation section and static production capacity section.
The layering segment number is identical as tracer number of species, and each layering section corresponds to a kind of tracer of label,
Each corresponding tracer of section that is layered is all different.
The calculation formula of the tracer dosage is：
M=100*Kp*N*3.14*R2*P2*T1/(P1*T2)
Wherein：M is tracer dosage, and Kp is formation porosity, and N is the saturated concentration of tracer, and R is maximum production capacity half
Diameter, P1For sampling pressure, P2For strata pressure, T1For probe temperature, T2For formation temperature.
The tracer is chemical tracer, including gas dissolubility tracer, oil-soluble tracer and water-soluble tracer；Institute
The heat resisting temperature for stating chemical tracer is more than 500 DEG C.
Described the step of injecting the tracer of different labels to each layering section in separate stratum fracfturing or acidization, specifically wraps
It includes：The tracer of different labels is numbered respectively, successively to the injection pair of each layering section in separate stratum fracfturing or acidization
The tracer answered, and track the migration path of tracer.
It is described to after the completion of separate stratum fracfturing or acidification return drain carry out oil and gas and water from and sampling the step of specifically include：
Oil/gas well outlet is connect by pipeline with gs-oil separator；Return drain from oil/gas well outlet enter oil gas water separator, gas with
The reduction for pressure escapes floating naturally, and oil, gas and water carry out initial gross separation according to difference in specific gravity；Oil mixing with water after initial gross separation
Object enters expansion chamber, and oil floats, underwater heavy realization grease further detaches；Oil, gas and water are discharged each by outlet line；It is right
Oil, gas and the water of discharge are sampled respectively.
The calculation formula of the yield of each interval is：
Vi=(Ci*V)/C (i=1.2.3 ... n)
Wherein：Vi is i-th section of actual production, and V is full well total output, and Ci is i-th section of tracer actual measurement in output aggregate sample
Content, C are each section of tracer total amount in output aggregate sample；Total output V includes total gas production, total oil production and always returns lifting rate；n
To be layered section total quantity.
The method of test Oil ＆ Gas Productivity section provided by the invention, each point is accurately marked by different tracers
Interval has and is not take up well head, without Operating Pressure, is not restricted by pit shaft, testing tool and supporting operation equipment, tests number
According to accurate and the advantages that continuous dynamic monitoring and tracer safety and environmental protection can be carried out, it is possible to provide production water, oil-producing and aerogenesis are contributed, extensively
It is general to be suitable for fractured horizontal well or acidification, high angle hole pressure break or acidification, huge thick-layer vertical well fracture or acidification, all kinds of old well repetitions
Pressure break or acidification improved initial stage, mid-term and later stage production capacity section plane test.
Description of the drawings
Fig. 1 is the method flow diagram of test Oil ＆ Gas Productivity section provided in an embodiment of the present invention；
Fig. 2 is the gas well static state production capacity section application example that method obtains through the embodiment of the present invention；
Fig. 3 is the gas well waterout production capacity section application example that method obtains through the embodiment of the present invention.
Specific implementation mode
With reference to the accompanying drawings and examples, technical solution of the present invention is further described.
Referring to Fig. 1, an embodiment of the present invention provides a kind of methods of test Oil ＆ Gas Productivity section, including：
Step S101：According to formation porosity, reservoir temperature preset value and layering segment number, the species number of tracer is determined
Amount, label and dosage.
Under normal conditions, the temperature range of gas well reservoir is 90-160 DEG C, and the temperature range of oil reservoir is 60-130 DEG C；
According to the temperature of each layering section reservoir, be determined for compliance with the tracer label of the layering section temperature, i.e., it is selected to be applicable in corresponding layering
The tracer of section reservoir temperature.Under normal conditions, layering segment number is identical as tracer number of species, and each layering section corresponds to
A kind of tracer of label, each corresponding tracer of section that is layered are all different, can accurately be marked by tracer so each
A layering section；Tracer type includes gas dissolubility tracer, oil-soluble tracer and water-soluble tracer.Tracer dosage M's
Calculation formula is：
M=100*Kp*N*3.14*R2*P2*T1/(P1*T2) (1)
In formula (1)：Kp is formation porosity, and N is the saturated concentration of tracer, and R is maximum production capacity radius, P1It is pressed for sampling
Power, P2For strata pressure, T1For probe temperature, T2For formation temperature.
In practical applications, the tracer of the present embodiment is chemical tracer, including gas dissolubility tracer, oil-soluble tracer
Agent and water-soluble tracer, have the following advantages that：1) stability is good, good with various fracturing fluids, acid solution compatibility；2) heat-resisting temperature
500 DEG C of degree or more, acid and alkali resistance；3) detectable concentration can reach ppb (10-9) grade；4) nontoxic, harmless, on-radiation, safety and environmental protection；
5) type is more, such as：Gas dissolubility tracer have 25 kinds, oil-soluble tracer have 35 kinds, water-soluble tracer have 30 kinds；6) single
Compatibility, such as：Gas dissolubility tracer is only affine with natural gas, repels with oil, water；Oil-soluble tracer is only affine with oil, with
Gas and water is repelled；Water-soluble tracer is only affine with water, repels with oil, gas.Table 1 is enumerated several common tracers.
Table 1
Step S102：The tracer of different labels is injected to each layering section in separate stratum fracfturing or acidization.
The tracer of different labels is numbered respectively, is noted successively to each layering section in separate stratum fracfturing or acidization
Enter corresponding tracer, and tracks the migration path of tracer.In practical applications, due to gas dissolubility tracer only with natural gas
Only affine, water-soluble tracer is only affine with water with crude oil for affine, oil-soluble tracer, therefore can pass through this affine uniqueness
Realize the tracking of tracer migration path.The gas dissolubility tracers of different labels, oil-soluble tracer, water-soluble tracer with not
Oil gas water with interval is affine, it is hereby achieved that the oil gas aquatic products artificial situation of each interval.
Step S103：After the completion of separate stratum fracfturing or acidification, to returning drain progress Oil-gas Separation and sampling.
Under normal conditions, oil/gas well outlet is connect by pipeline with gs-oil separator；It returns drain and is exported from oil/gas well and entered
Oil gas water separator, gas escape floating naturally with the reduction of pressure, and oil, gas and water carry out initial gross separation according to difference in specific gravity；
Oil water mixture after initial gross separation enters expansion chamber, and oil floats, underwater heavy realization grease further detaches；Oil, gas and water are each
It is discharged from by outlet line.The oil, gas and water of discharge are sampled respectively.
Step S104：According to the concentration of each tracer in oil, gas and water sample, tracer production curve is generated.
In practical applications, the concentration of each tracer in oily, gas and water sample is detected using gas chromatograph.And accordingly
Draw out the curve that each tracer concentration changes over time, i.e. tracer production curve.Tracer production curve can be shown that oil,
The content of tracer changes with time relationship in gas and water.
The process that tracer concentration is detected using gas chromatograph is as follows：
1) sample introduction：Sample micro syringe is injected into gas chromatograph sampling device, sample is in injector by heating gas
Change.
2) chromatographic isolation：Sample gas is carried by chromatographic column by carrier gas, under certain operating conditions, each component is not with
With time leave column outlet, export in chromatograph and by separator weeded out carrier gas, only allow retained fraction molecule into
Enter the ion source of mass spectrograph.
3) ionization accelerates to analyzer：The molecule of sample, which enters after ion source, to be ionized as charged ion, and charged ion exists
Under the action of accelerating potential, the analyzer of directive mass spectrograph.
4) chromatographic peak is obtained：The ion stream of collection by amplifying and recording, is obtained the chromatography of the component by ion detection pole
Peak.Total ion chromatography peak is exactly the process that certain component appears in ion source by the process declined again as low as summit.
5) it calculates quantitative：Mass spectrograph is connect with data system, and mass signal is inputted computer, and peak is calculated by chromatographic peak
Area carries out quantitative analysis.
Step S105：Each tracer production curve is fitted calculating, and binding test total output calculates each layer
The yield of section generates Dynamic Productivity Calculation section and static production capacity section.
Calculating is fitted to each tracer production curve, the concentration of tracer in every section of output object can be obtained, it should
Concentration is in a linear relationship with yield.It drives a well after pressure break and asks production, it is assumed that n sections of total outputs are V, and i-th section of yield is Vi, then calculation formula
For：
Vi=(Ci*V)/C (i=1.2.3 ... n) (2)
In formula (2)：Vi is i-th section of actual production, and V is full well total output, and Ci is i-th section of tracer reality in output aggregate sample
Content is surveyed, C is each section of tracer total amount in output aggregate sample；Total output V includes total gas production, total oil production and always returns drain
Amount.
Further, Dynamic Productivity Calculation section is calculated each section in each sample of yield accounting by formula (2) and constituted, static
Production capacity section is made of each section of yield accounting summation.
Fig. 3 is the application example of the present embodiment Dynamic Productivity Calculation section, and wherein gas well has 21 intervals, there is 50 sample points,
Corresponding 50 samples, each section has 50 values.Fig. 2 is the percentage that each section of 50 values summation obtains in Fig. 3, i.e., static production capacity
Section.
Method provided in an embodiment of the present invention using tracer test Oil ＆ Gas Productivity section, have be not take up well head,
It without Operating Pressure, is not restricted by pit shaft, testing tool and supporting operation equipment, test data is accurate and can continuously be moved
State monitoring and other advantages, it is possible to provide production water, oil-producing and aerogenesis contribution are widely used in fractured horizontal well or acidification, high angle hole pressure
It splits or is acidified, huge thick-layer vertical well fracture or acidification, all kinds of old well refracturings or acidification improved initial stage, mid-term and later stage produce
It can section plane test.The chemical tracer safety and environmental protection that the embodiment of the present invention uses, can quantitative assessment go out the dynamic output of each interval
Contribution amount and static throughput contribution amount, the main force to filter out oil/gas well contribute interval, to the pilot production of block where testing well,
The setting of manufacturing parameter and finimeter test the offer valid data of the establishment with development plan and have great importance.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (7)
1. a kind of method of test Oil ＆ Gas Productivity section, which is characterized in that including：
According to formation porosity, reservoir temperature preset value and layering segment number, number of species, label and the use of tracer are determined
Amount；
The tracer of different labels is injected to each layering section in separate stratum fracfturing or acidization, and to separate stratum fracfturing or has been acidified
After return drain carry out oil and gas and water from and sampling；
According to the concentration of each tracer in sample, tracer production curve is generated；
Each tracer production curve is fitted calculating, and binding test total output calculates the yield of each interval, generated
Dynamic Productivity Calculation section and static production capacity section.
2. as described in claim 1 test Oil ＆ Gas Productivity section method, which is characterized in that the layering segment number with show
Track agent number of species are identical, and each layering section corresponds to a kind of tracer of label, each to be layered the corresponding tracer of section not
It is identical.
3. the method for test Oil ＆ Gas Productivity section as described in claim 1, which is characterized in that the meter of the tracer dosage
Calculating formula is：
M=100*Kp*N*3.14*R2*P2*T1/(P1*T2)
Wherein：M is tracer dosage, and Kp is formation porosity, and N is the saturated concentration of tracer, and R is maximum production capacity radius, P1For
Sampling pressure, P2For strata pressure, T1For probe temperature, T2For formation temperature.
4. the method for test Oil ＆ Gas Productivity section as described in claim 1, which is characterized in that the tracer shows for chemistry
Track agent, including gas dissolubility tracer, oil-soluble tracer and water-soluble tracer；The heat resisting temperature of the chemical tracer is more than
500℃。
5. the method for test Oil ＆ Gas Productivity section as described in claim 1, which is characterized in that described in separate stratum fracfturing or acid
The step of injecting the tracer of different labels to each layering section during change specifically includes：Respectively to the tracer of different labels into
Row number injects corresponding tracer to each layering section successively in separate stratum fracfturing or acidization, and tracks the fortune of tracer
Move track.
6. the method for test Oil ＆ Gas Productivity section as described in claim 1, which is characterized in that described to separate stratum fracfturing or acid
After the completion of change return drain carry out oil and gas and water from and sampling the step of specifically include：Oil/gas well outlet passes through pipeline and oil gas point
It is connected from device；It returning drain and enters oil gas water separator from oil/gas well outlet, gas escapes floating naturally with the reduction of pressure,
Oil, gas and water carry out initial gross separation according to difference in specific gravity；Oil water mixture after initial gross separation enters expansion chamber, and oil floats, is underwater
It is heavy to realize that grease further detaches；Oil, gas and water are discharged each by outlet line；The oil, gas and water of discharge are distinguished
Sampling.
7. the method for test Oil ＆ Gas Productivity section as described in claim 1, which is characterized in that the yield of each interval
Calculation formula is：
Vi=(Ci*V)/C (i=1.2.3 ... n)
Wherein：Vi is i-th section of actual production, and V is full well total output, and Ci is that i-th section of tracer surveys content in output aggregate sample,
C is each section of tracer total amount in output aggregate sample；Total output V includes total gas production, total oil production and always returns lifting rate；N is point
Interval total quantity.
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| CN111236905A (en) * | 2018-11-13 | 2020-06-05 | 中国石油化工股份有限公司 | Method for testing horizontal well output profile |
| CN112324431A (en) * | 2020-09-27 | 2021-02-05 | 四川瑞都石油工程技术服务有限公司 | Multi-spectral-band high-resolution intelligent production test method for oil and gas well |
| CN112990629A (en) * | 2019-12-17 | 2021-06-18 | 中国石油化工股份有限公司 | Unconventional oil and gas reservoir exploitation method and system |
| CN113374462A (en) * | 2020-03-10 | 2021-09-10 | 西安德创石油科技有限公司 | Staged fracturing productivity tracking and evaluating method for oil-gas well |
| CN113756790A (en) * | 2021-09-07 | 2021-12-07 | 西安石油大学 | Novel multi-section productivity evaluation method for oil and gas well |
| CN116044366A (en) * | 2022-12-28 | 2023-05-02 | 捷贝通石油技术集团股份有限公司 | Long-acting tracing real-time monitoring method for perforation, fracturing and production stages of oil and gas reservoir |
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| CN111236905A (en) * | 2018-11-13 | 2020-06-05 | 中国石油化工股份有限公司 | Method for testing horizontal well output profile |
| CN110952980A (en) * | 2019-11-22 | 2020-04-03 | 西南石油大学 | Quantum dot tracer feeding device and fracturing horizontal well output section method |
| CN111005714A (en) * | 2019-11-28 | 2020-04-14 | 中国海洋石油集团有限公司 | Method for monitoring oil well yield by using tracer |
| CN111005714B (en) * | 2019-11-28 | 2023-02-28 | 中国海洋石油集团有限公司 | Method for monitoring oil well yield by using tracer |
| CN112990629B (en) * | 2019-12-17 | 2024-03-29 | 中国石油化工股份有限公司 | Unconventional oil and gas reservoir exploitation method and unconventional oil and gas reservoir exploitation system |
| CN112990629A (en) * | 2019-12-17 | 2021-06-18 | 中国石油化工股份有限公司 | Unconventional oil and gas reservoir exploitation method and system |
| CN113374462A (en) * | 2020-03-10 | 2021-09-10 | 西安德创石油科技有限公司 | Staged fracturing productivity tracking and evaluating method for oil-gas well |
| CN112324431A (en) * | 2020-09-27 | 2021-02-05 | 四川瑞都石油工程技术服务有限公司 | Multi-spectral-band high-resolution intelligent production test method for oil and gas well |
| CN112324431B (en) * | 2020-09-27 | 2023-01-10 | 四川瑞都石油工程技术服务有限公司 | Multi-spectral-band high-resolution intelligent production test method for oil and gas well |
| CN113756790A (en) * | 2021-09-07 | 2021-12-07 | 西安石油大学 | Novel multi-section productivity evaluation method for oil and gas well |
| CN113756790B (en) * | 2021-09-07 | 2023-10-03 | 西安石油大学 | Multi-section productivity evaluation method for oil and gas well |
| CN116044366B (en) * | 2022-12-28 | 2023-09-22 | 捷贝通石油技术集团股份有限公司 | Long-acting tracing real-time monitoring method for perforation, fracturing and production stages of oil and gas reservoir |
| CN116044366A (en) * | 2022-12-28 | 2023-05-02 | 捷贝通石油技术集团股份有限公司 | Long-acting tracing real-time monitoring method for perforation, fracturing and production stages of oil and gas reservoir |
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