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CHALLENGE

Perform simultaneous three-phase well

 tests at a remote, unmanned platform

while ensuring reliable results.

SOLUTION

Use the PhaseTester* portable multiphase

well testing equipment to perform a multiple

choke study and obtain real-time three-

phase test results without separation.

RESULTS

Successfully tested five wells in 16 hours

while remotely monitoring production in

real time.

“The mobile PhaseTester meter was

 the perfect solution to our production

challenges, which included well

 testing at our remote platform with

minimum facility, limited space, anda lack of power supply; collecting

single-phase samples in the absence

of test separators; and back allocation

production for reservoir engineering

and management purposes.”

B.K. Patnaik

Deputy General Manager, Production

ONGC

Remote offshore well requires real- time multiphase testingONGC constructed an unmanned, remote

platform in the Bassein & Satellite field located

offshore Mumbai. At the time of development,

 the platform was constructed with minimum

facility and a projected life of about 5 years.

All of ONGC’s wells in the field were initially

 tested in 2002, and those test results had beenused as a reference ever since. When gas

demand increased, ONGC wanted to increase

 the choke size and plan an efficient workover

program for the wells. However, because each

well’s production data at that time was not reli-

able, reservoir engineering and management

decisions were difficult to make with certainty.

Mobile multiphase meter quantifiesreal-time data without separationAfter consulting with Schlumberger, ONGC

chose to test the wells using PhaseTester

equipment with Vx* multiphase well testing technology and perform simultaneous testing

operations while the rig was drilling a nonpay

zone at an adjacent well.

Meter successfully, accurately testswells in 16 hoursTwenty hours after the equipment arrived

at the offshore platform, the well services

 team was ready to begin testing. InterACT*

connectivity, collaboration, and information

system was used to monitor the test from the office, enabling the ONGC team to make

real-time decisions. All 5 offshore wells were

comprehensively tested in 16 hours.

CASE STUDY

 Well Testing

PhaseTester Meter Allows ONGC to SimultaneouslyTest Five Wells Offshore India in 16 Hours

Mobile testing technology enables three-phase flow rate measurementand production enhancement plan without prior fluid separation

www.slb.com/PhaseTeste *Mark of Schlumberger

Other company, product, and service names

are the properties of their respective owners.

Copyright © 2012 Schlumberger. All rights reserved. 12-TS-0101

The mobile PhaseTester equipment with Vx technology simultaneously tested five offshore wells in 16 hours.

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Real-time, remote well testdata monitoring from the PhaseTester equipment with Vx technology. This multiphase well testing technology measures oil,gas, and water flow rates without prior separation.