cprs application in the oilfield
TRANSCRIPT
7/23/2019 CPRS Application in the Oilfield
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ENMAX® CPRS® ENMAX TECHNOLOGY(SHANGHAI) CO. • SHAN
APPLICATION
THE OIL INDUS
ENMAX ®
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PARAFFIN, SCALE AND CORROSION ISSUES IN THE O
Productionwells
Meteringstation
TransferStation
Joint Station
Natural GasProcessing Plant
Waste WaterPlant
PARAFFIN, SCALE AND CORROSION PROBLEMS OCCUR IN EVERY
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WHERE ENMAX® CPRS® CAN BE USED?
! Downhole Units ! Flowing wells
! Pumping wells
! Gas-lifting wells
!
Water injection w
! Surface Units
!
Oil/Gas productio
!
Oil/Gas storage &facilities
!
Water Injection lin
!
Produced Water facilities
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ENMAX® CPRS® OILFIELD UNITS | DOWNHOL
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ENMAX® CPRS® OILFIELD UNITS | DOWNHOL
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ENMAX® CPRS® OILFIELD UNITS | SURFACE UN
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ENMAX® CPRS® OILFIELD UNITS | SURFACE UN
INLINE STYLE DISCS CANISTER
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ENMAX® CPRS® OILFIELD INSTALLATION | FLOWIN
CPRS
Downhole unit
Packer
Perforations
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ENMAX® CPRS® OILFIELD INSTALLATION | PUMPING
Pump
CPRS Downhole unit
Perforations
Packer
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ENMAX® CPRS® OILFIELD INSTALLATION | ESP
ESP
ESP Sub
Packer
CPRS Downhole unit
Perforations
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ENMAX® CPRS® OILFIELD INSTALLATION | ESP
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ENMAX® CPRS® OILFIELD INSTALLATION | GAS LIFTIN
CPRSDownhole unit
Packer
Gas MandrelCPRSDownh
Packe
Gas M
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ENMAX® CPRS® OILFIELD INSTALLATION | OIL/GAS
PRODUCTION, STORAGE AND TRANSPORTATION F
PRODUCTION WELL CPRS
OIL/GAS S
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ENMAX® CPRS® OILFIELD INSTALLATION | OIL/GAS
PRODUCTION, STORAGE AND TRANSPORTATION F
CPRS
OIL TANK
WATER PIPELINE
OIL PIPELINE
NATURAL GAS
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ENMAX® CPRS® OILFIELD INSTALLATION | WATER I
FACILITIES
I
CPRS
WATER TANK
WATERINJECTION
PUMP
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
! CRUDE TRANSP! ENMAX ® CPRS ®
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
! DETERMINE THE POSITION OF THEINSTALLATION
! WELL SITE MEETING
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
! TRANSPORTATION AND FIRETRUCKS PREPARED
! DRAIN THE PIPELINE
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
!
MOVE THE CPRS UNITTO THE LOCATION
! REMOVE THEWRAPPING MATERIALSON PIPE LINE
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
FLAMELESS CUTTING
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A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION
!
WELDING AND PRESSURE TESTEDDONE!
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PARAFFIN | QI24-8 WELL, DAGANG OILFIELD
!
Operator: No. 5 Production Co., Dagan
! Location: Zhouqingzhuang Oilfield
! 29 oil wells, serious paraffin issue during tproduction
! Per the reports from 2010, Of 11 rod pumand 3 ESP wells, production has be be st8 times, 30,000 meters of pumping rod h
replaced because of paraffin buildups.! Conventional hot oil treatment was emp
which resulted in loss circulation of hot oof low formation pressure.
! Qi 24-8 well, serious pumping rod paraffoccurred, one hot oil treatment every 12
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PARAFFIN | QI 24-8 WELL, DAGANG OILFIELD
! March 12th, 011,
Downhole unit waQi 24-8 well;
! Till January, 2012
production for 325
without any hot oi
! The comparison o
and Amps, the loaare in the normal totaled at a produincrease of 337 to
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PARAFFIN | QI 24-8 WELL, DAGANG OILFIELD
Qi 24-8 Production Curve
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PARAFFIN | QI 24-8 WELL, DAGANG OILFIELD
PUMP CARD AFTER THE INSTALLATION OF CPRS
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PARAFFIN |Q-12 WELL, ZHONGYUAN OILFIEL
Operator: No. 6 Production COil Field, Sinopec
Location: Qiaokou
Well No.: Q2-12, one of the mparaffin wells
Before the installation of CPR
2012
! Daily Liquid 0.6 tonsDa
! Up stroke 58 ADown str
! One hot oil treatment ev
0.6
0.8
0.3
0.5
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
Before After
Liquid, T/D
Oil, T/D
Comparison of Production Rate before and After
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PARAFFIN |Q-12 WELL, ZHONGYUAN OILFIEL
58
4848
41
0
10
20
30
40
50
60
70
Before After
Up, A
Down, A
Comparison of Motor Amps before and After
One year after the insCPRS
!
Up stroke 48 A, Dow41 A;
!
One hot oil treatm55 days
!
Daily Liquid 0.8 ton0.5 tons;
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Paraffin | Daqing Oilfield #7 Production Comp
! Installation Location: Crew #710, Daqing Oilfield #7 Production Company
! Well # 63-72/Oct.,15, 2013; Well# 69-782/Oct.,18, 2013
DN 50 PN 2.5MPa
WeValve Group Room
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Paraffin | Daqing Oilfield #7 Production Comp
Onsite Installation Photos
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Paraffin | Daqing Oilfield #7 Production Comp
Basic Data from Well 63-72 & 69-782
Well
No.
Oil
t/d
Liquid
t/d
Water
%
Flowline
size
mm
Flowline
Length
m
Max
Back
Pressure
MPa
Hot O
Cyle d
63-72 2.23 25.51 91.27 60*3.5 90 3.8 30
69-782 0.69 22 96.86 60*3.5 950 3.5 30
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Paraffin | Daqing Oilfield #7 Production Comp
Back Pressure Comparison before and after the installation
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Paraffin | Daqing Oilfield #7 Production Comp
Chemical Cleaning Interval (days) Before and After the installation
30 30
60 60
150
210
0
50
100
150
200
250
Well 63-72 Well 69-782
Before th
After the
Summer
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Paraffin | Daqing Oilfield #7 Production Comp
Oil Pressure Comparison Before and After the installation @We
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Paraffin | Daqing Oilfield #7 Production Comp
Oil Pressure Comparison Before and After the installation @We
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Paraffin | Daqing Oilfield #7 Production Comp
Photo Comparison before (left) and After (right) the installat
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Scale & Corrosion | Sinopec Zhongyuan Oilfiel
! Well#: Xinhe
!
Operator: NoCompany
! Downhole issuCorrosion
Before the installation
! Daily Production: 1.3 tons of Liquid, 1.2 tons of crude
! Heavy scale and corrosion on tubing string & pump
! Averaged at a pump repair every 45 days, three times of pump failures within six
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Scale & Corrosion | Sinopec Zhongyuan Oilfiel
One Year after the installation
!
Daily Production: 2.5 tons of Liquid, 1.5 tons of crude
! No new scale buildups on tubing string and the pump
!
No pump repair job within 370 days
0
0.5
1
1.5
2
2.5
3
Before
installation
A
insta
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SCALE | CNOOC BOHAI OIL COMPANY
!
Location: Well No.:SZ36-1-J10, SZ36-1Platfo
! Operator: CNOOC Bohai Oil Company
!
Before installation:
! Production started on Dec. 14, 1997 with ESP. Th
was stabilized above 100 m3/d after acidizing in
! Since mid April, 2005, EPS failed frequently due t
! A magnetic scale tool was run into the well, but
failed in a short time, less than 3 months
! It was concluded that such a frequent pump in
repair was mainly caused by the downhole scaresulted pump failure and reduced production
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SCALE | CNOOC BOHAI OIL COMPANY
! Scale analysis indicated that the mai
scale is Ba0.75Sr 0.25SO4, up to 98%
!
Barium(Ba) and Strontium (Sr) scale, wdifficult scale to deal with
% Imp
Ba0.7
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SCALE | CNOOC BOHAI OIL COMPANY
!
After the installation
! The ESP was repaired on May 4, 2006, and a CPRS downhole unit was run into the well wit
! After the installation of Enmax CPRS downho
Enmax Shanghai was advised that the produ
been stabilized at 250 m3/d, with a crude pr
of 80 m3/d, and no more EPS failure becausebuildups
! Till the report date, Oct. 16th, 2008, continuou
production for 892 days, no breakdown
! Within 892 days, EPS repair related cost savin
7,700,000 RMB, Oil production increase >16,5
! This downhole CPRS unit is still working in this w
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SCALE | CNOOC BOHAI OIL COMPANY
J10
井生产曲线
050
100
150
200
250
300
350
400
2004-11-9 2005-2-17 2005-5-28 2005-9-5 2005-12-
14
2006-3-24 2006-7-2 2006-10-
10
2007-1-18 2007-4-28 2007-8-6 2007
1
日期
产 液
电流
泵 排量
SZ36-1-J10 Production Curves before and after the installation
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SCALE | CNOOC BOHAI OIL COMPANY
Scale Prevention and Removal Seminar by CNOOC in Sanya, Hainan, C
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SCALE | GNPOC CRUDE FLOW LINES
!
LocatioNE-03 &
! Trial Perto Augu
!
CPRS Un
of 6”x 1units, o
!
Report Septem
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SCALE | GNPOC CRUDE FLOW LINES
Before the CPRS
! NE-3 & NEE-3
frequently chto scale depo
! Scale inhibito
20 L/D for eac
! Even with sca
injection scaldeposition
! Flow line acid
carried out fre
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SCALE | GNPOC CRUDE FLOW LINES
Scales before the CPRS installation
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SCALE | GNPOC CRUDE FLOW LINES
Scales before the CPRS installation
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SCALE | GNPOC CRUDE FLOW LINES
Well Name THP FLP
NE-03 450 400
NEE-03 490 410
! NE-3& NEE-3 ENMAX CPRS installed on 20/05/2014!
Chemical injection stopped after ENMAX installed as requested by Enmax
! NE-3 &NEE-3 Parameters after ENMAX installation were steady
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SCALE | GNPOC CRUDE FLOW LINES
! NE-3 tripped on 8
downhole reasonperformance eva
done at this mom
! NE-3 flow line inspno scale deposit flowline and valve
! NE-3 test line and
line, which was noCPRS, was almost
blocked90% blo
! NE-3 blocked test
production line cfabricated anoth
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SCALE | GNPOC CRUDE FLOW LINES
! NE-3 started back on 18/8and well parameters stea
! NEE-3 evaluation confirmthe same conclusion, the
line with CPRS installed, thpressure stays stable and
scale deposit was noticedand the the test line withoCPRS ended up with high
pressure and scale blocka
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SCALE | GNPOC CRUDE FLOW LINES
NO SCALE DEPOSIT THREE MONTHS AFTER CPRS INSTALLATION
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SCALE | GNPOC CRUDE FLOW LINES
50 UNITS PURCHASED BY GNPOC
WITHIN 6 MONTHS AFTER THE EVALU
NO SCALE DEPOSIT THREE MONTHS AFTER CPRS INSTALLATION
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SCALE | DAQING #1 PRODUCTION COMPAN
! Located at
the country!
Heaters arenecessary ecrude gath
transportat
!
Very hard p> 4000 mg/scale prob
heaters
!
Over 10 yeproductionhave been
CPRS for heissues.
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SCALE | DAQING #1 PRODUCTION COMPAN
! Zhongxin 201 transfer sta
capacity of 14000 m3/dmetering stations and 15
! High hardness producedmg/L, higher than the av4000 mg/L;
! High composition of Ca2
CO3
2- in the produced wscale;
! Chemicals were used fobut scale buildup has be
issue all the time.
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SCALE | DAQING #1 PRODUCTION COMPAN
!
Three CPRS units were
Jan., 5, 2006 at the inle
! Chemicals stopped on
! Before the final evalua2016, CPRS units had b
for 10 months without a
!
For evaluation of the sprevention performan
locations (2#4# heawater mixing pump) w
for inspection points;
!
Two inspections done August, 2006.
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SCALE | DAQING #1 PRODUCTION COMPAN
Inspection
points
Before
installation
June 13, 2006 Aug. 30, 2006 88 days
w/o
chemicals
165
w
che
4# Heater
tubes
6 mm Hard 1mm Crispy
2# Heater
tubes
6 mm Hard 3mm Crispy -3
Water
Mixing
pump filter
2 mm Hard
to
knock
off
Can be scraped off easily Easy to clea
Scale Deposit Evaluation before and after CPRS installation
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SCALE | DAQING #1 PRODUCTION COMPAN
!
Before the installa
CPRS units, the hebe acid cleanedscale cleaning;
!
After the installati
units, the scale ca
off within 1 hour, nthe surface.
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SCALE | ZHONGYUAN OILFIELD NATURAL GAS STA
! Locat
WeiqiGatheNatur
Compexcha
! OperaNo.3 P
Comp
! Main
hardnwater
Scalethe sy
plugg
year
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SCALE | ZHONGYUAN OILFIELD NATURAL GAS STA
Before the installation
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SCALE | ZHONGYUAN OILFIELD NATURAL GAS STA
One year after the installation
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SCALE | ZHONGYUAN OILFIELD NATURAL GAS STA
One year after the insta
!
Two CPRS surface unit
Weiqi-1& Weiqi-11 NatGathering Station, onestation
!
No scale buildup on thcap, heat exchanger
! No maintenance for o
!
65000 RMB saving on h
jet clean cost every ye! Stable discharging tem
|
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
! Serious scale buildOilfield, for exampleproduct ion l ine
averagely 3 cm scale3 months.
! The production linesacid cleaned period
not as well as expinfluenced the produc
increased the produc
SCA | A M O C OW N S
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
! An Enmax 4”X6” CPRwas in installed on TZ1line, in Sept, 2013
! CPRS unit was instaproduction lines unde
SCALE | TARIM OILFIELD CRUDE FLOW LINES
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
! Inspection & Performance
100 days after the CPRShad been producing wproblems.
O n J a n . , 3 r d , 2 0 1 4
connections at 5 metemeters away after the CPopened for inspection
deposits at all.
! Conclusion
After three month trial
CPRS did prevent scasuccessfully , which reaexceeded the oilfield exp
SCALE | TARIM OILFIELD CRUDE FLOW LINES
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
On the bin TZ163 Wconfirm t
repeataperforma
units wasinstalled which is
the wors
SCALE | TARIM OILFIELD CRUDE FLOW LINES
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
! At the end of triaperiodOn theafternoon of May
2015, the CPRS unwas opened on
TZ4-755 well forinspection.
SCALE | TARIM OILFIELD CRUDE FLOW LINES
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SCALE | TARIM OILFIELD CRUDE FLOW LINES
! Again, no scale buildups,clean as shown in the photo.
! The Chief Engineer, Mr. YaWenbin, witnessed these t
trial test inspection.
! Tarim Oil Field made adecision to only use Enmax
CPRS for Tarim scale issue,because this oilfield tried
some other method withouany success.
MAJOR OIL COMPANIES USING ENMAX® CPR
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MAJOR OIL COMPANIES USING ENMAX® CPR
GNPOC
MAJOR CHINESE OILFIELDS USING ENMAX® C
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MAJOR CHINESE OILFIELDS USING ENMAX® C
!
PETROCHINA XINJIANG OILFIELD
! PETROCHINA TARIM OILFIELD
! PETROCHINA HAINAN FUSHAN OIL
! SINOPEC SHENGLI OILFIELD
! SINOPEC ZHONGYUAN OILFIELD
! SINOPEC HENAN OILFIELD
! SINOPEC JIANGSU OILFIELD
! SINOPEC HUABEI OIL GAS DIVISION
! CNOOC NAIHAI WEST OILFIELD
! CNOOC NANHAI EAST OILFIELD
! CNOOC BOHAI OILFIELD
!
PETROCHINA DAQING OILFIELD
! PETROCHINA LIAOHE OILFIELD
! PETROCHINA JILIN OILFIELD
! PETROCHINA JIDONG OILFIELD
! PETROCHINA DAGANG OILFIELD
! PETROCHINA HUABEI OILFIELD
! PETROCHINA SICHUAN OILFIELD
! PETROCHINA CHANGQING OILFIELD
! PETROCHINA YUMEN OILFIELD
! PETROCHINA QINGHAI OILFIELD
! PETROCHINA TUHA OILFIELD