SPE MPD Presentation

February 10, 2018 | Author: chirag.rathi | Category: Drilling Rig, Pressure, Fluid Dynamics, Drilling, Gas Technologies
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Managed Pressure Drilling Society of Petroleum Engineers- Ghana Kenny Thomson

Kenny Thomson

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“To Give an introduction to Transocean and our operations in Ghana” Ghana “I t d “Introduce M Managed d Pressure P Drilling” D illi ” – – – – – – –

Explain Conventional drilling E l i M Explain Managed dP Pressure D Drilling illi Advantages of MPD MPD Equipment and Rig Considerations MPD risks and control measures MPD Rewards History / Future of MPD

Close with Questions and Discussion 3

•129 Offshore drilling units •50 Offices and Training centres •30 Countries C •6 of the worlds 7 Continents

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50 High-Specification Floaters 25 Mid-Water Mid Water Floaters

9 High High-Spec Spec Jack Jack-Ups Ups 44 Standard Jack-ups

2 Ultra Deepwater Drillships g p Jack-Ups p 4 High-Spec Under Construction 5

G lf off Guinea Gulf G i Region R i

DSP

MTR ENR

MAR

Region Summary

702 BAL

ADX 135MGLHi7 AD9

JRY

•Ultra Ult D Deepwater t Drillships D ill hi – 2 •Semi Submersibles – 4 •Jack-Ups – 6 6

GSF Monitor

• Jack-up rig pp • Bottom Supported • 25ft-400ft Water Depth • Côte d'Ivoire

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Transocean Marianas Sedco Energy

• Basic spec

• ENR • Semi-Submersible • Dynamically positioned • 7500ft of water

• • • •

MAR Semi-Submersible M Moored d 7000ft of water

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Discoverer Spirit • • • • •

Dynamically positioned 10,000ft of water Self Propelled Drill ship Liberia

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Transocean People • 18,000+ , Employees p y g globally y “Transocean will be Universally recognized for innovation and excellence in unlocking the worlds offshore resources” “We will be our Customers’ trusted partner and their p preferred solution Provider” 10

MPD Definition e to “An adaptive drilling process used to precisely control the annular pressure profile throughout the wellbore”

IInternational Association of  t ti lA i ti f Drilling Contractors

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Conventional Surface Eq. Top  Drive

Shaker Mud Pump

Mud Pit

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Conventional Drilling

Drilling fluid pumped down string Returns back up annulus to surface p

Drilling fluid provides a barrier against formation pressure Blow Out  Preventor

Formation  Pressure

To Prevent influx to the wellbore: Bottom Hole Pressure must be greater than Formation Pressure

BHP = Phyd + Pcirc BHP ≥ Pf 13

Drilling Window Theoretical Well Profile with straight lines

Less than Pore  Pressure = Influx  to Wellbore to Wellbore

Well Depth

Fracture Pressure Pore Pressure Pore Pressure

Drilling Window

Pressure

Greater than  Fracture Pressure  = Breakdown of  formation ie Fluid  losses

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Connections While drilling:

BHP = Phyd y + Pcirc Top Drive, Rotates and circulates fluid through drill string

Drill pipes racked

When stopping circulation for Connections:

BHP = Phyd + Pcirc Connection Well Depth Fracture Pressure Bottom Hole Pressure Pore Pressure

Top of drill string

Pressure

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Real life well diagram Narrow Drilling  Narrow Drilling Window Cannot afford to  loose the  pressure from pressure from  Circulation, will  take an influx

Wellll W Depth

Fracture Cannot increase  Pressure mud mud density, will  density, will Pore Pressure

break down  formation

Pressure 16

Real life well diagram

This Well is Un‐‐Drillable! Un

Fault

Wellll W Depth

Shale

Narrow  Drilling Window

Narrow Drilling  Narrow Drilling Window Cannot afford to  loose the  pressure from pressure from  Circulation, will  take an influx

Fracture Cannot increase  Pressure mud mud density, will  density, will

Sand

Pore Pressure

break down  formation

Pressure 17

MPD Can make C k P Previously i l U Un-drillable d ill bl wells, Drillable.

Two main reasons: • Constant Circulation through connections y , back pressure p applied pp • Pressurised fluid system, at surface to act through entire system Constant and Controlled Bottom Hole Pressure throughout entire section.

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Advantages of MPD Surface Back  Pressure

Drilling with MPD g Fluid Density + Friction  + back pressure

Drill through Narrow  Drilling Windows No loss in Bottom Hole  Pressure during Pressure during  connections

Well Depth Static weight:  Fluid density

Increased visibility of  unfavourable well  conditions Greater control of down  b bottom hole pressure h l

Pressure

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MPD Surface Eq. Top  Drive Constant circulation

Mud Gas separator

Shaker

3 Part Telescopic Joint

Mud Pit

Mud Pump

RCD (Rotating Circulating Device)

Surface Annular Flow Spool Top of  Marine Riser

Choke manifold

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MPD Equipment Circulating Subs Addition to Drill floor mud manifold Side entry subs on top of each drill pipe stand Drilling fluid routed through Side inlet hose during connections

Next stand  Next stand of Drill pipe

Check  Valves

Side inlet  hose 21

MPD Equipment Rotating circulating device; RCD Positioned in Marine riser string near surface Sealing elements are tight against drillpipe

Sealing  elements  seal around  drillpipe

Bearing  rotates with rotates with  drillpipe

Elements housed in bearing which c rotates otates with t d drillpipe p pe System is pressurized below RCD Prevents  returns fluid returns fluid  passing up  the annulus

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MPD Equipment Flow Spool Spool, Surface Annular Flow spool directs returning fluid from annulus through flexible flow lines RCD

Surface Surface  annular p Flow Spool Flow lines



Top of  Marine  Riser



Surface annular in place in case of emergency where annulus pressure mayy exceed RCD pressure rating. g Annular can be closed to work on RCD while maintaining pressurised system

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MPD Equipment Choke Manifold Downstream  fluid flow

Coriolis meter

All returns fluid passes through Choke Manifold Hydraulic chokes are where surface back pressure is applied Coriolis Mass flow meter

Flowline hoses

All fluid downstream of Choke Manifold is atmospheric pressure

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MPD Equipment Mud Gas Separator, Separator cuttings cleaning MGS

If gas is detected in returns fluid, it is routed through MGS Gas is vented up to highest point on rig at tip of derrick Fluid continues to Shakers where solids are removed Everything thereafter is the same as conventional drilling

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MPD Equipment Control and Display system

Flow In

Back  Pressure

Choke  position

Flow Out

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Rig Considerations

MPD equipment in moonpool

Non MPD moonpool

Choke Manifold T l Telescopic Joint i J i t RCD Surface Annular Flow Spool Flow Spool Top of Marine Riser 27

Rig Considerations • E Each h rig i iis unique i with ith diff differentt d designs i and d equipment i t • MPD compatibility is a large scale engineering project

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Rig Considerations Non standard operation p MPD rig up in moonpool We introduce new Operating procedures, Testing regimes, Maintenance plans and Rig up procedures New to our crews, training and familiarisation is essential. essential Training helps ensure a safe and efficient operation

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Risks of MPD & Controls in place No Static flow check

Example Signature tests and trends observed

Downhole problems may be masked by Constant Circulation and Surface Pressure Controls: • Signature testing provides expected trends • Close monitoring of trends carried out by MPD operator

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Risks of MPD & C Controls in place Surface Back  Pressure

Drilling with MPD g

Loss of back pressure or circulation



• Well will go underbalance Influx may be taken

Fluid Density + Friction  + back pressure

Well Depth

Controls: • Redundancy of circulating equipment • Two chokes in choke manifold

Static weight:  Fluid density

Pressure

Risks of MPD & C Controls in place Plugging of surface equipment Controls: • Built in redundancy • Flushing points

6”  Fl li Flowlines 18” Marine  Riser

4” Choke  Manifold

6” lines back to  shakers 32

Rewards of MPD This is is to  Scale!!

Early Kick Detection

People

Assets Environment

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MPD History

PMCD CBHP

Rig Name

Rig Type

Location

Customer

Year

Application

Status

Trident 8

Jack Up

Cabinda

Gulf

2003

PMCD

Completed

Sedco 601

Semi Sub

Indonesia

Santos

2004

PMCD w/ Surface BOP

Completed

Sedco 601

Semi Sub

Indonesia

Santos

2005 - 2006

PMCD w/ Risercap™

Completed

Roger W. Mowell

Jack Up

Malaysia

Talisman

2006 - 2007

CBHP

Completed

Constellation II

Jack Up

Egypt

BP

2007

CBHP HPHT CBHP,

Completed

High Island VII

Jack Up

Gabon

Total

2007

CBHP, HPHT

Completed

Deepwater Frontier

DP Drillship

India

Reliance

2007

CBHP, Concentric Riser

Completed

Actinia

Semi Sub

India

Reliance

2008

CBHP, Concentric Riser

Completed

Arctic III

Semi Sub

Libya

ENI

ECD, HPHT, Reconfigurable Riser

Completed

Harvey H. Ward

Jack Up

Malaysia

Talisman

2009

CBHP

Completed

Shelf Explorer

Jack Up

Malaysia

Talisman

2009

CBHP

Completed

Trident IX

Jack Up

Indonesia

Pearl

2010

UBD (Low Head Drilling)

Completed

Sedco 601

Semi Sub

Malaysia

Petronas

2010

CBHP

Completed

GSF Explorer

DP Drillship

Indonesia

MSEC

2010 - 2011

CBHP, PMCD, Riser Degassing

Ongoing

GSF Rig 135

Semi Sub

Nigeria

Addax

2011 - 2012

CBHP, HPHT

Completed

Actinia

Semi Sub

Malaysia

Petronas

2011 - 2012

PMCD w/Risercap™

Completed

Marianas

Semi Sub

Ghana

ENI

2012

CBHP, HP

Completed

HH Ward

Jack Up

Indonesia

Pertamina

2012

PMCD

Ongoing

Pressurized Mud Cap Drilling Constant Bottom Hole Pressure

HPHT UBD

2008 - 2009

High Pressure and High Temperature Under Balanced Drilling

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MPD Future / CAPM C Constant t t Annular A l P Pressure M Managementt • • •

CAPM™ is a Transocean product D lG Dual Gradient di t D Drillingilli Hi h d Higher density it d down h hole, l lilighter ht flfluid id iin marine i riser i Closed circulating system for enhanced kick detection

Bending the Curve  g in Deepwater 35

Sunset, April 13th 2012  Transocean Marianas

“To Give and introduction to Transocean and our operations in Ghana” “Introduce Introduce Managed Pressure Drilling” Advantages: •Constant Bottom Hole Pressure •Navigate Narrow Drilling Windows •Early Kick Detection

Questions? Response Discussion….

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Contact details: Managed Pressure Drilling in Gulf of Guinea Kenny y Thomson ((Nigeria) g ) [email protected] +234 813 767 4883

Ghana Human Resources Enquiries Sheila Ocansey y (Ghana) ( ) [email protected] +233 302 743906

Managed g Pressure Drilling g and CAPM™ Iain Sneddon (UK) [email protected] +44 1224 427759

Managed g Pressure Drilling g and CAPM™ John Kozicz (US) [email protected] +1 713/232-7388

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