CPRS Application in the Oilfield

7/23/2019 CPRS Application in the Oilfield

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ENMAX® CPRS® ENMAX TECHNOLOGY(SHANGHAI) CO. • SHAN

APPLICATION

THE OIL INDUS

ENMAX ®



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



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



ENMAX® CPRS® OILFIELD UNITS | DOWNHOL



ENMAX® CPRS® OILFIELD UNITS | DOWNHOL



ENMAX® CPRS® OILFIELD UNITS | SURFACE UN



ENMAX® CPRS® OILFIELD UNITS | SURFACE UN

INLINE STYLE DISCS CANISTER



ENMAX® CPRS® OILFIELD INSTALLATION | FLOWIN

CPRS

Downhole unit

Packer

Perforations



ENMAX® CPRS® OILFIELD INSTALLATION | PUMPING

Pump

CPRS Downhole unit

Perforations

Packer



ENMAX® CPRS® OILFIELD INSTALLATION | ESP

ESP

ESP Sub

Packer

CPRS Downhole unit

Perforations



ENMAX® CPRS® OILFIELD INSTALLATION | ESP



ENMAX® CPRS® OILFIELD INSTALLATION | GAS LIFTIN

CPRSDownhole unit

Packer

Gas MandrelCPRSDownh

Packe

Gas M



ENMAX® CPRS® OILFIELD INSTALLATION | OIL/GAS

PRODUCTION, STORAGE AND TRANSPORTATION F

PRODUCTION WELL CPRS

OIL/GAS S



ENMAX® CPRS® OILFIELD INSTALLATION | OIL/GAS

PRODUCTION, STORAGE AND TRANSPORTATION F

CPRS

OIL TANK

WATER PIPELINE

OIL PIPELINE

NATURAL GAS



ENMAX® CPRS® OILFIELD INSTALLATION | WATER I

FACILITIES

I

CPRS

WATER TANK

WATERINJECTION

PUMP



A TYPICAL ENMAX® CPRS® SURFACE UNIT INSTALLATION

! CRUDE TRANSP! ENMAX ® CPRS ®




! DETERMINE THE POSITION OF THEINSTALLATION

! WELL SITE MEETING




! TRANSPORTATION AND FIRETRUCKS PREPARED

! DRAIN THE PIPELINE




!

MOVE THE CPRS UNITTO THE LOCATION

! REMOVE THEWRAPPING MATERIALSON PIPE LINE




FLAMELESS CUTTING




!

WELDING AND PRESSURE TESTEDDONE!



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



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




Qi 24-8 Production Curve




PUMP CARD AFTER THE INSTALLATION OF CPRS



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



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;



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




Onsite Installation Photos




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




Back Pressure Comparison before and after the installation




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




Oil Pressure Comparison Before and After the installation @We




Oil Pressure Comparison Before and After the installation @We




Photo Comparison before (left) and After (right) the installat



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



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



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




! 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




!

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




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




Scale Prevention and Removal Seminar by CNOOC in Sanya, Hainan, C



SCALE | GNPOC CRUDE FLOW LINES

!

LocatioNE-03 &

! Trial Perto Augu

!

CPRS Un

of 6”x 1units, o

!

Report Septem




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




Scales before the CPRS installation




Scales before the CPRS installation




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




! 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




! 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




NO SCALE DEPOSIT THREE MONTHS AFTER CPRS INSTALLATION




50 UNITS PURCHASED BY GNPOC

WITHIN 6 MONTHS AFTER THE EVALU

NO SCALE DEPOSIT THREE MONTHS AFTER CPRS INSTALLATION



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.




! 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.




!

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.




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




!

Before the installa

CPRS units, the hebe acid cleanedscale cleaning;

!

After the installati

units, the scale ca

off within 1 hour, nthe surface.



SCALE | ZHONGYUAN OILFIELD NATURAL GAS STA

! Locat

WeiqiGatheNatur

Compexcha

! OperaNo.3 P

Comp

! Main

hardnwater

Scalethe sy

plugg

year




Before the installation




One year after the installation




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

|



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




! An Enmax 4”X6” CPRwas in installed on TZ1line, in Sept, 2013

! CPRS unit was instaproduction lines unde





! 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





On the bin TZ163 Wconfirm t

repeataperforma

units wasinstalled which is

the wors





! At the end of triaperiodOn theafternoon of May

2015, the CPRS unwas opened on

TZ4-755 well forinspection.





! 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



MAJOR OIL COMPANIES USING ENMAX® CPR

GNPOC

MAJOR CHINESE OILFIELDS USING ENMAX® C



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

CPRS Application in the Oilfield

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