CN103225499A - System and method for analyzing working condition of water injection well in oil field - Google Patents

System and method for analyzing working condition of water injection well in oil field Download PDF

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Publication number
CN103225499A
CN103225499A CN2013101276014A CN201310127601A CN103225499A CN 103225499 A CN103225499 A CN 103225499A CN 2013101276014 A CN2013101276014 A CN 2013101276014A CN 201310127601 A CN201310127601 A CN 201310127601A CN 103225499 A CN103225499 A CN 103225499A
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China
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water
water injection
injection well
pressure
relative
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CN2013101276014A
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Chinese (zh)
Inventor
于世春
杨仓海
李永长
穆谦益
赵晓龙
李明江
李珍
邱亮
程世东
张彬
邱奇
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中国石油天然气股份有限公司
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Priority to CN2013101276014A priority Critical patent/CN103225499A/en
Publication of CN103225499A publication Critical patent/CN103225499A/en

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Abstract

The invention discloses a system and a method for analyzing the working condition of a water injection well in an oil field, and belongs to the field of water injection well technology management in oil-gas field development. The system comprises a data collection module used for collecting a pressure flow value and a water quality parameter value of the water injection well, a ground working condition analysis module used for comparing the pressure flow value of the water injection well with the set pressure flow threshold value and judging the ground working condition of the water injection well according to a comparison result, a shaft stratum working condition analysis module used for creating a mapping relation between the relative injection amount and the relative injection pressure of the water injection well according to the pressure flow value and the water quality parameter value of the water injection well and judging the real-time working condition of the water injection well, and a water quality analysis module used for judging if the water quality of the water injection well meets the water injection requirement according to the water quality parameter value and analyzing the water quality working condition of the water injection well. According to the system, a model for analyzing and diagnosing the working condition of the water injection well is created, so that the production management demand in the water injection site of the oil field can be met.

Description

A kind of water injection well in oil fields performance analysis system and method thereof
Technical field
The invention belongs to oil-gas field development water injection well technical management field, particularly a kind of water injection well in oil fields performance analysis system and method thereof under the oil field digital management pattern.
Background technology
Water filling is that the oil field keeps stratum energy, keeps the most effective means of high-efficiency and economic exploitation.Rose in 2008, long celebrating oil field begins the oil field digital Construction, require under the oil field digital management pattern that water injection well management becomes more meticulous, digitlization, flattening, accomplish real-time monitoring, precise guidance, gather the water injection well parameter in real time, analyze operating modes such as water injection well flow, pressure, fault, be the reservoir management service, raise the efficiency simultaneously, reduce labour intensity, realize the network-enabled intelligent management.
Conventional oil-field flooding flow process is water source-water-injection station-distributing room for water injection-water injection well.Under the oil field digital management pattern, generally near water injection well, use current stabilization water distribution valve group, cancelled distributing room for water injection, realize the automatic steady current water filling of water injection well.The well performance analysis should realize the performance analysis of water injection well in conjunction with the situation of flow stabilizing valve.
Prior art also discloses part oil well condition analytical system, but is oil well condition or well working condition acquiring data equipment or instrument mostly, the real-time automatic analysis system of all rarely seen water injection well operating mode.
At present, oil well still relies on the technician to analyze by ten days, the moon, season, year mostly, and main existing problems have:
1, it is poor manually to enroll real-time property.Data can't in time be controlled the balance of water filling by artificial admission and management, patrol the well poor working environment, and labour intensity is big etc.;
2, performance analysis lags behind.The well operating mode can not in time be grasped the water injection well real-time working condition by the ten days comparative analysis, and fault has appearred in water injection well can not in time be found to handle, and has influenced meticulous flood effectiveness;
3, performance analysis workload is big.Hundreds of mouth water injection well will be managed in each operation area, and under the oil field digital management pattern, waterflood management will become more meticulous, and the emphasis forward end is extended to individual well, and field control and lab analysis must be stressed on both hands.Cause that technician's routine work amount is big, work is heavy, and the compound technology talent quantity that adapts with digital management is comparatively deficient, the performance analysis difficulty does not satisfy oil field digital management requirement.
Summary of the invention
Technical problem to be solved by this invention provides a kind of water injection well in oil fields performance analysis system and method thereof, solved the technical problem of water injection well in oil fields performance analysis inefficiency and data accuracy difference in the prior art.
For solving the problems of the technologies described above, the invention provides a kind of water injection well in oil fields performance analysis system, comprise data acquisition module, ground performance analysis module, wellbore formation performance analysis module and analysis of water module;
Wherein, described data acquisition module is used to gather the pressure current value and the water quality parameter value of water injection well;
Described ground performance analysis module is used for the pressure current value of described water injection well and the pressure flow threshold value of setting are compared, and according to described comparing result, judges the ground operating mode of described water injection well;
Described wellbore formation performance analysis module is used for pressure current value and the water quality parameter value according to described water injection well, set up the relative injection rate of described water injection well and the mapping relations of relative injection pressure, according to the mapping relations of described relative injection rate and relative injection pressure and the water flooding regime of described water injection well, the real-time working condition of described water injection well is judged;
Described analysis of water module is used for according to described water quality parameter value, whether the water quality of described water injection well is met waterflooding requirement judge, and then analyze the working condition of water quality of described water injection well.
A kind of water injection well in oil fields performance analysis method comprises the steps:
Gather the pressure current value and the water quality parameter value of water injection well;
The pressure current value of described water injection well and the pressure flow threshold value of setting are compared,, judge the ground operating mode of described water injection well according to described comparing result;
Pressure current value and water quality parameter value according to described water injection well, set up the relative injection rate of described water injection well and the mapping relations of relative injection pressure, according to the mapping relations of described relative injection rate and relative injection pressure and the water flooding regime of described water injection well, the real-time working condition of described water injection well is judged;
According to described water quality parameter value, whether the water quality of described water injection well is met waterflooding requirement judge, and then analyze the working condition of water quality of described water injection well.
Further, described pressure current value comprises water knockout drum pressure, pipe pressure, oil pressure, casing pressure, the injection allocation water yield, real water injection rate and instantaneous delivery.
Further, described water quality parameter value comprises suspension content, total iron content, oxygen content and oil content.
Further, the computational methods of described relative water injection rate are as the formula (1):
η is relative injection rate in the formula, dimensionless; q AnnotateBe actual water injection rate, m 3/ d; q JoinBe injection allocation water yield amount, m 3/ d;
Further, the computational methods of relative injection pressure are as the formula (2):
Wherein, P is relative injection pressure, dimensionless; P EffectivelyBe effective injection pressure, Mpa; P BrokenBe formation fracture pressure, Mpa.
Further, the mapping relations of described relative injection rate and relative injection pressure as the formula (5);
η=Ap-B?????(5)
Wherein, η is relative injection rate, dimensionless; P is relative injection pressure, dimensionless; A and B are fixed coefficient.
Further, described water flooding regime comprises commingled water injection, water injection through tubing and casing, hollow or eccentric dispensing, the anti-notes.
Water injection well in oil fields performance analysis system provided by the invention and method thereof, having set up water injection well performance analysis and diagnostic model can realize all kinds of operating mode complete analysis of water injection well in oil fields, and realized the identification of water injection well operating mode, improved water injection well in oil fields performance analysis efficient, compare with the manual analysis operating mode, data accuracy also is improved, thereby satisfies oil-field flooding in-situ production management demand, realizes the digitized fine management to water injection well.
Description of drawings
The water injection well in oil fields performance analysis method step figure that Fig. 1 provides for the embodiment of the invention;
Fig. 2 divides schematic diagram for 5 water injection well production status zones that the embodiment of the invention provides;
The specific embodiment
The water injection well in oil fields performance analysis system that the embodiment of the invention provides comprises data acquisition module, ground performance analysis module, wellbore formation performance analysis module and analysis of water module;
Wherein, data acquisition module is used to gather the pressure current value and the water quality parameter value of water injection well;
Ground performance analysis module is used for the pressure flow threshold value of the pressure current value of water injection well and setting is judged, according to judged result, judges the ground operating mode of water injection well;
Wellbore formation performance analysis module is used for according to the pressure current value of water injection well and water quality parameter value, set up the relative injection rate of water injection well and the mapping relations of relative injection pressure, according to the mapping relations of relative injection rate and relative injection pressure and the water flooding regime of water injection well, the real-time working condition of water injection well is judged;
The analysis of water module is used for according to the water quality parameter value, whether the water quality of water injection well is met waterflooding requirement judge, and then analyze the working condition of water quality of water injection well.
Referring to Fig. 1, the embodiment of the invention provides a kind of water injection well in oil fields performance analysis method, and existing the need carried out performance analysis to 3 mouthfuls of well saliva wells such as this block dish 69-20, dish 63-24 and dish 61-20, specifically comprises the steps:
Step 101: the pressure current value and the water quality parameter value of gathering water injection well;
By the pressure current value of pressure sensor collection water injection well, this pressure current value comprises water knockout drum pressure, pipe pressure, oil pressure, casing pressure, the injection allocation water yield, real water injection rate and instantaneous delivery, specifically referring to table 1; By real water injection rate of intelligent flow meter collection and instantaneous delivery, by calling the injection allocation water yield and the water quality parameter value of oil field data storehouse A2 system acquisition water injection well, this water quality parameter value comprises suspension content, total iron content, oxygen content and oil content, specifically referring to table 1;
The parameters value of three mouthfuls of water injection wells of table 1
? Dish 69-20 Dish 63-24 Dish 61-20
The operation area Pan Gu's beam operation area Pan Gu's beam operation area Pan Gu's beam operation area
Distributing room for water injection Dish 69-18 joins Willow 139 is joined Dish 61-20 joins
Water filling layer position Long 6 Long by 61, length 62 Long by 61, length 62
Water flooding regime Commingled water injection Hollow dispensing Hollow dispensing
Water quality Clear water Clear water Clear water
Suspension content 3.0 4.0 3
Total iron content 0.05 0.05 0.05
Dissolved oxygen content 0.05 0.05 0.05
Oil-containing 0 0 0
Water knockout drum pressure 13.6 14 14.3
Pipe is pressed 10.0 10.7 10
Oil pressure 10.0 10.5 8.5
Casing pressure 9.5 0 8.5
The injection allocation water yield 25 20 40
Real water injection rate 0 21 55
Instantaneous delivery 888.88 0.94 2.42
Year tired water injection rate 1786 1384 2895
Step 102: the ground operating mode of judging water injection well;
The pressure current value of water injection well and the pressure flow threshold value of setting are compared,, judge the ground operating mode of water injection well according to comparing result;
According to this oil-field flooding situation, the scope that obtains of setup parameter, because tile system pressure is 25Mpa, the scope of pressure is 0-25Mpa, the scope of the injection allocation water yield and real water injection rate is 0-100m 3, instantaneous delivery is 0-5m 3/ h, pressure and the collection in real time in per 5 minutes of moment flow once are dish 69-20 such as pound sign, in the pressure flow threshold range of force value in its setting, then operating mode is normal, but as if the pressure flow threshold value of instantaneous flow value greater than its setting, its operating mode is an instrument failure, specifically sees Table 2;
The pairing operating mode table of the pressure current value of table 2 different injection well
Step 103: the real-time working condition to water injection well is judged;
Pressure current value and water quality parameter value according to water injection well, set up the relative injection rate of water injection well and the mapping relations of relative injection pressure, according to the mapping relations of relative injection rate and relative injection pressure and the water flooding regime of water injection well, the real-time working condition of water injection well is judged;
Step 1031: set up the relative injection rate of water injection well and the mapping relations of relative injection pressure;
In embodiments of the present invention, the method for calculating relative water injection rate is as the formula (1):
η is relative injection rate in the formula, dimensionless; q AnnotateBe actual water injection rate, m 3/ d; q JoinBe injection allocation water yield amount, m 3/ d;
The method of calculating relative injection pressure is as the formula (2):
Wherein, P is relative injection pressure, dimensionless; P EffectivelyBe effective injection pressure, Mpa; P BrokenBe formation fracture pressure, Mpa.
And the computational methods of stratum suction injectivity index are as the formula (3):
Wherein, K is the stratum injectivity index, m 3/ (dMpa); q AnnotateBe actual water injection rate, m 3/ d; P EffectivelyBe effective injection pressure, Mpa; P BrokenBe formation fracture pressure, Mpa.
When injectivity index and strata pressure one timing, q annotates with P ground certain linear, and both sides are with multiplying factor P Broken/ q Join, can obtain through conversion
Order Following formula can be written as:
η=Ap-B?????(5)
According to other areas, such as long celebrating Xifeng, Nan Liang, Jingan County, 4 layer positions, Ansai well means of production and formation physical parameters statistics, calculate the coefficient value of A, B, see Table 2:
Each means of production and formation physical parameters table in the table 24 layer position well
By statistics, the average of A, B is respectively 4.5 and 2.3, therefore, in embodiments of the present invention, according to formula (5), the relative injection rate of water injection well and the mapping relations of relative injection pressure as the formula (6):
η=4.5p-2.3?????(6)
Step 1032:, the real-time working condition of water injection well is judged according to the mapping relations of relative injection rate and relative injection pressure and the water flooding regime of water injection well;
Referring to Fig. 2, utilizing formula (5) is the mould coordinate with relative injection rate η, and injection pressure P is an ordinate relatively, sets up the dynamic control chart model of η-P water injection well production, and setting the η normal range (NR) is 90-110%, is divided into 5 water injection well production status zones;
According to the oil-field flooding experience, obtain η-P line bound by η=4.5p-2.3 upper and lower translation, be the reasonable district of the relative injection pressure of water filling, upper limit a line is η On=4.5p-3.2, lower limit b line is η Down=4.5p-1.4; The c line is η 1=0.9, the d line is η 2=1.1, the intersection point among the figure is determined: D 1Point is a line and c line intersection point; D 2Point is a line and d line intersection point; D 3Point is b line and c line intersection point; D 4Point is b line and d line intersection point.
In embodiments of the present invention,, determine a line, b line, c line and d line earlier, determine D according to a line, b line, c line and d line then according to the mapping relations of relative injection rate and relative injection pressure 1, D 2, D 3And D 4Four intersection points are divided into normal district respectively, short the district, surpass and annotate the district, wait to transform the district and treat practicable district according to a line, b line, c line and d line and four intersection points more at last;
Wherein, the zone is normally distinguished: under rational pressure, finished injection allocation water yield task; Short the district: do not finish injection allocation water yield task; The super district of annotating: overfulfil the injection allocation water yield; Wait to transform the district: the water injection pressure height, injection rate is low; Wait to implement the district: injection pressure is low, but the water injection rate height needs checking data, implements reason.
In embodiments of the present invention, water flooding regime mainly contains: commingled water injection, water injection through tubing and casing, hollow or eccentric dispensing, anti-notes etc.
According to the mapping relations of relative injection rate and relative injection pressure and the water flooding regime of water injection well, the real-time working condition of water injection well is judged concrete determination methods is as follows:
For normal district: no matter the water flooding regime of water injection well is any, and its water injection well operating mode is normal substantially, satisfies the requirement of the oil field injection allocation water yield.
For shorting the district:,, work as P if water flooding regime is a commingled water injection owing to do not finish injection allocation water yield task OilWith P CoverDiffer by more than 1.0Mpa, operating mode is the tubing string fouling, otherwise is the water nozzle obstruction; And if water flooding regime is a dispensing, then operating mode is that water nozzle stops up.
Distinguish for super the notes: owing to overfulfil the injection allocation water yield, if water flooding regime is a commingled water injection, operating mode is the cover damage; If water flooding regime is a dispensing, work as P OilWith P CoverDiffer less than 0.2Mpa, operating mode is that first order packer lost efficacy or the leakage of tubing string top, otherwise for the water nozzle thorn greatly.
For waiting to transform the district: because the water injection pressure height, injection rate is low, and no matter the water flooding regime of water injection well is any, and operating mode is and analyses is that the stratum water absorbing capacity descends.
Implement the district for waiting: injection pressure is low, but the water injection rate height needs checking data, implements reason.
Step 104: the working condition of water quality of analyzing water injection well;
According to the water quality parameter value, whether the water quality of well is met waterflooding requirement judge, and then analyze the working condition of water quality of water injection well.
The SY/T5329-94(clastic reservoir water water quality proposed standard that adopts of water quality index wherein), specific targets are: concentration of suspension S≤5.0mg/L, total iron content Fe +≤ 0.05mg/L, dissolved oxygen content O 2≤ 0.05mg/L, oil content C O≤ 2.0mg/L.As long as exceed index, then the working condition of water quality of this water injection well is defective for injecting water quality;
The embodiment of the invention is passed through 3 sample analyses, at first by gathering the pressure current value and the water quality parameter value of water injection well, successively to the ground operating mode of water injection well, the real-time working condition of water injection well and the working condition of water quality of water injection well are analyzed, can realize all kinds of operating mode complete analysis of water injection well in oil fields, and realized the identification of water injection well operating mode, satisfy water injection well performance analysis requirement under the digital model of oil field, solved the manual analysis poor in timeliness, drawbacks such as workload is big, certain 160 mouthfuls of water injection well in district has been carried out the field trial application, followed the tracks of through 6 months, water injection well performance analysis coincidence rate is more than 90%, and the water injection well in oil fields performance analysis system advantage that the embodiment of the invention provides is as follows:
1, fully uses pressure sensor and the intelligent flow meter that the well well head is installed, realized parameter real-time automatic collecting such as water injection well flow pressure, guaranteed accuracy and promptness that the well operating mode is judged;
2, utilize ground performance analysis module, wellbore formation performance analysis module and analysis of water module, realized the analysis automatically in real time of water injection well operating mode, propose oil field digital management pattern and descended water injection well performance analysis flow process, it is loaded down with trivial details to overcome traditional well performance analysis process, poor in timeliness, drawbacks such as labour intensity is big have improved analysis efficiency;
3, realized the online statistics of water injection well index, data analysis can provide foundation according to the proposition measure suggestion targetedly of different operating modes, for the water injection well digitlization flattened management decision-making that becomes more meticulous subsequently.
It should be noted last that, the above specific embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to example, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (8)

1. a water injection well in oil fields performance analysis system is characterized in that, comprises data acquisition module, ground performance analysis module, wellbore formation performance analysis module and analysis of water module;
Wherein, described data acquisition module is used to gather the pressure current value and the water quality parameter value of water injection well;
Described ground performance analysis module is used for the pressure current value of described water injection well and the pressure flow threshold value of setting are compared, and according to described comparing result, judges the ground operating mode of described water injection well;
Described wellbore formation performance analysis module is used for pressure current value and the water quality parameter value according to described water injection well, set up the relative injection rate of described water injection well and the mapping relations of relative injection pressure, according to the mapping relations of described relative injection rate and relative injection pressure and the water flooding regime of described water injection well, the real-time working condition of described water injection well is judged;
Described analysis of water module is used for according to described water quality parameter value, whether the water quality of described water injection well is met waterflooding requirement judge, and then analyze the working condition of water quality of described water injection well.
2. a water injection well in oil fields performance analysis method is characterized in that, comprises the steps:
Gather the pressure current value and the water quality parameter value of water injection well;
The pressure current value of described water injection well and the pressure flow threshold value of setting are compared,, judge the ground operating mode of described water injection well according to described comparing result;
Pressure current value and water quality parameter value according to described water injection well, set up the relative injection rate of described water injection well and the mapping relations of relative injection pressure, according to the mapping relations of described relative injection rate and relative injection pressure and the water flooding regime of described water injection well, the real-time working condition of described water injection well is judged;
According to described water quality parameter value, whether the water quality of described water injection well is met waterflooding requirement judge, and then analyze the working condition of water quality of described water injection well.
3. analytical method according to claim 2 is characterized in that, described pressure current value comprises water knockout drum pressure, pipe pressure, oil pressure, casing pressure, the injection allocation water yield, real water injection rate and instantaneous delivery.
4. analytical method according to claim 2 is characterized in that, described water quality parameter value comprises suspension content, total iron content, oxygen content and oil content.
5. analytical method according to claim 2 is characterized in that, the computational methods of described relative water injection rate as the formula (1):
η is relative injection rate in the formula, dimensionless; q AnnotateBe actual water injection rate, m 3/ d; q JoinBe injection allocation water yield amount, m 3/ d.
6. analytical method according to claim 5 is characterized in that, the computational methods of described relative injection pressure as the formula (2):
Wherein, P is relative injection pressure, dimensionless; P EffectivelyBe effective injection pressure, Mpa; P BrokenBe formation fracture pressure, Mpa.
7. analytical method according to claim 6 is characterized in that, the mapping relations of described relative injection rate and relative injection pressure as the formula (5);
η=Ap-B?????(5)
Wherein, η is relative injection rate, dimensionless; P is relative injection pressure, dimensionless; A and B are fixed coefficient.
8. analytical method according to claim 2 is characterized in that, described water flooding regime comprises commingled water injection, water injection through tubing and casing, hollow or eccentric dispensing, the anti-notes.
CN2013101276014A 2013-04-12 2013-04-12 System and method for analyzing working condition of water injection well in oil field CN103225499A (en)

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