Microflux Control System Opens a Conventionally Inaccessible Offshore Drilling Operation in Egypt, Enhances Safety

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8 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

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© 2011 Weatherford. All rights reserved. 9018.00
weatherford.com
REAL RESULTS
Weatherford products and services are subject to the Company's standard terms and conditions, available on request
or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted
otherwise, trademarks and service marks herein are the property of Weatherford and may be registered in the United
States and/or other countries. Weatherford products named herein may be protected by one or more U.S. and/or
foreign patents. For more information, contact patents@weatherford.com. Specifications are subject to change
without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in
the applicable contract between Weatherford and the client.
Microflux

Control System Opens
a Conventionally Inaccessible
Offshore Drilling Operation in
Egypt, Enhances Safety
Location
Egypt

Formation
Not specified

Well Type
Offshore, vertical with side tracks

Rig Type
Jackup

Hole Size

14-3/4 × 12-1/4 in.

12-1/4 × 10-5/8 in.

8-1/2 in.

6 in.

Measured Depth

12,073 to 18,897 ft (3,680 to 5,760 m)

14,379 to 17,345 ft (4,383 to 5,287 m)
side tracks

Products/Services

Secure Drilling
SM
services

Microflux control system

Model 7875 rotating control device

Coriolis mass flowmeter

Deliver a system that eliminates the narrow-margin drilling
problems such as lost circulation, pressure ramps, and a narrow
drilling window of 0.2 lb/gal with variable mud weights and
formation pressure uncertainty.

Provide a more precise method to predict and control the annular
pressure profile while detecting and controlling loss and gain
influxes.

Enhance overall operational safety by gaining control of
downhole events.
Objectives

Using the Microflux system at the surface, the operator achieved
equivalent circulating density (ECD) management by using
variable mud weights, controlling the surface backpressure
(SBP), and monitoring the annular flow.

The Microflux system accurately determined the precise drilling
pressure profiles such as pore pressure and fracture gradients
by recording the bottomhole pressure where an influx from the
formation and fluid losses occurred and performing formation
integrity and inflow tests.

The Coriolis mass flowmeter supplied valuable information
and helped distinguish between different types of well events.

Using the Microflux system, the operator achieved high-
pressure/high-temperature fingerprinting, ballooning identification
and quantification, and management of the mud-weight program.
These portions provided confirmation of a statically underbalanced
condition during connections and verified the need to increase
mud weight.
Results
Weatherford
Secured Drilling services
securedrillingservices@weatherford.com
The operator drilled approximately 10,826 ft
(3,300 m) using the Microflux system. The
formation pressure across the wellbore ranged
from 16.1- to 17.8-lb/gal equivalent mud weight
using a drilling window as narrow as 0.2 lb/gal
across the 8 1/2-in. section.
© 2011 Weatherford. All rights reserved. 9018.00
weatherford.com
REAL RESULTS
Weatherford products and services are subject to the Company's standard terms and conditions, available on request
or at weatherford.com. For more information contact an authorized Weatherford representative. Unless noted
otherwise, trademarks and service marks herein are the property of Weatherford and may be registered in the United
States and/or other countries. Weatherford products named herein may be protected by one or more U.S. and/or
foreign patents. For more information, contact patents@weatherford.com. Specifications are subject to change
without notice. Weatherford sells its products and services in accordance with the terms and conditions set forth in
the applicable contract between Weatherford and the client.
Value to Client

In a well identified to be unsafe and inefficient using conventional
drilling technology, the managed pressure drilling (MPD) using
the Microflux™ system eliminated numerous drilling-related
problems during operations.

By performing formation integrity and inflow tests, the Microflux
system enabled the operator to acquire well information that
would have been challenging to obtain using conventional
technology.

Using the SBP, the Microflux system promoted lowering mud
weights and controlling the bottomhole ECD. The lighter mud
weight balanced the hydraulic condition between the pore
pressures and fracture gradients, enabling the operator to drill
farther.

Despite the high-formation temperatures, the Microflux system
performed periodic dynamic inflow testing, dynamic formation
integrity testing, and dynamic leakoff testing. This testing helped
determine the pore pressures and fracture gradients more
accurately.

The Coriolis mass flowmeter was effective in monitoring
well behavior and providing information about detecting and
managing well-control situations. The flowmeter also helped
with inflow testing, formation integrity testing, and leakoff testing.
The resulting information helped to gain the accurate loss and
gain rates, which provided the operator with the actual
annular pressure profile.

The cumulative effect of MPD using the Microflux system enabled
the operator to enhance overall safety, making it possible to drill
this well.
Secure Drilling
SM
MPD services and the
Microflux system improved operational
performance during drilling operations.