© 2011 halliburton. all rights reserved. icem ® service achieving wellbore integrity with sound,...

© 2011 HALLIBURTON. ALL RIGHTS RESERVED.

iCem® Service

Achieving wellbore integrity with sound, technical decision making


Increasing the Probability of Wellbore Integrity

Sound technical decisions rely on:– Field-proven technical solutions– Laboratory-driven empirical data

And now the most robust cementing design tool available in the industry:

Drive better decisions by collaboratively conducting iterative scenarios and evaluating alternatives for

achieving successful cementing operations.

iCem® Service


iCem® Service – Wellbore Integrity

Increasing the probability of a successful cementing job

• Restrict fluid movement between formations

• Bond and support the casingHydrocarbon Zone

Water Aquifer

Hydrocarbon Zone


BENEFITS OF LIFE-OF-THE-WELL CEMENTING

Long-Term Zonal Isolation

Help Increase Production and Minimize the Occurrence of Sustained Casing Pressure

Help Minimize Remedial Costs

Help Minimize Environmental Impact

iCem® Service – Analysis for the Life of the Well

DrillingCompletion

Production


General Cementing Job – Process OverviewSolution Development Finite Element

Analysis Computational Fluid

Dynamics

Job Execution Density Control High-Capacity Blender Dropping the Plug Bulk Delivery and Feed

Results Evaluation Bump the Plug Cement Bond Log

Cement Sheath with optimum zonal isolationis the objective for each individual well.


Solution Development Well Configuration Formation Properties Casing Properties Operational Loads Mud, Spacer, Cement

Fluid Properties

Job Execution Real-Time Data

ECD (calculated) Fluid Volumes &

Densities Pump Rates Planned vs Actual

Job Comparison

Results Evaluation Future Design

Optimization Analysis of ECDs, Fluid

Volumes, Fluid Density, Pump Rates, etc.

Fresh User Interface PROFILE™ Wellbore

Schematic with Directional View

2D Hydraulics Simulator 3D Fluid Displacement

Simulator Stress Analysis Simulator

Dynamic Temperature Modeling with Heat Transfer and Slurry Placement Temperature Graph

Real-time Data Acquisition and Monitoring

High-Level Features

iCem® Service – Process Overview


Legacy Discrete Software Now Consolidated

OptiCem™ SoftwareCement Job SimulationFinite Element Analysis

Displace 3D® SimulatorDisplacement models in 3DComputational Fluid Dynamics

WellLife® Express ServiceCement Sheath Stress AnalysisFinite Element Analysis

Data AcquisitionField data acquisition and monitoring

iCem® Service


iCem® Service


Two-Dimensional Hydraulic Simulation

Equivalent circulating density (ECD) management Dynamic temperature affects on fluid properties Pump schedule design

– With and without foam cement – Volume to achieve TOC

Balanced plug Standoff Torque and drag Surge and swab Mud removal and erodibility Advanced rheological modeling Other utilities (i.e. integrated fluid-flow potential) Complex wellbore geometry designs Automatic pump rate adjustment to stay below fracture gradient


Two-Dimensional Hydraulics Simulation

Interactive temperature profile graph – Casing temperature– Annular temperature

profiles– Bottomhole

circulating temperature


Two-Dimensional Hydraulics Simulation

Cement stages temperature tracker


Three-Dimensional Displacement Simulator

Fluid interface Fluid placement over time at all depths

– Drilling fluid – Spacer– Lead cement– Tail cement

Helps determine spacer volume to avoid contamination of cement



Conforms to highly eccentric annuli or localized washout

Predict Material Volumes to – Avoid contamination – Achieve top of cement (TOC)

Achieve optimum casing standoff Determine impact of pump rate Determine impact of pipe rotation

and reciprocation



The same data can be represented both in a graph (above) or a cross section of the well (below)

Helps determine a volume of spacerfor optimized displacement.

Direct correlation of data.

70%

10%

In this example further iterations are required to develop a design that eliminates channeling.


Cement Sheath Stress Analysis

Cement hydration Shoe pressure testing Fracturing / stimulation Completion fluid change

out Injection and production Evacuation / unloading Well kill

Examines Effects of Planned Well Operations on Specific Cement Designs


Cement Sheath Stress Analysis

Predicts the competence of a cement sheath Generates mechanical properties for the sheath to

survive downhole stress conditions Simulator elements

– Properties of the formation– Well structure – Long-term critical well conditions

Casing Fluid Pressure Casing Fluid Temperature Pore Pressure

(psi) (°F) (psi)

11409.0 416.0 11076.0

Operation Type MD TVD Pre-Job Temperature

(ft) (ft) (°F)

Product 166880 166880 141.0


Cement Sheath Stress Analysis – “What If?”

Reports on performance differing cement systems allowing cost analysis

Enables decisions based comparisons of cementing mechanical properties

– Young’s Modulus– Poisson’s Ratio– Shrinkage– Thermal expansion– Compressive strength– Tensile strength– Thermal conductivity– Specific heat


Real-Time Data Acquisition and Monitoring

Real-time collection and graphing of cementing operations data – Equivalent circulating densities (ECDs)– Pump pressure– Pump rate– Fluid volume– Fluid density– Scores


Real-Time Data Acquisition and Monitoring

Evaluation of pre-job simulations against recorded job data – During or after the job– Identification of probable causes of irregularities

on the job– Enables optimization of future designs


Challenge (Libya)– Poor cement bond log (CBL) results

from first two production wells in a new field

Solution– Three-dimensional displacement

Simulation and cement sheath stress analysis

• Modified mud rheology• Increased use of centralizers to

achieve 70% standoff• Increased spacer volume to 60

bbl

Result– Significantly improved CBLs in wells

after optimized plan via iCem® service

Case History – Field ApplicationPoor CBL fromprevious wells

Excellent CBL after simulationsdesigned solution modifications


Challenge (Shale North America)– Highly stressed formation subjecting

wells to excessive washout, sloughing shales, stuck pipe, and poor cement jobs

Solution – iCem® service simulation revealed risks of debonding and causes of sheath failure over time due to wellbore stresses and led to changes as follows:

– Wellbore fluid conditioning– Optimized centralizer placement for

proper standoff– Cement spacer properties– Resilient mechanical properties

designed into the slurry to address completion and production wellbore stresses to the cement sheath

Result– CBL indicated dramatic improvements

in placement coverage over conventional cements used previously

– Previously required remediation was avoided

Case History – Field Application


Challenge (HPHT)– High profile eastern-hemisphere wells for a

major operator in a field where previous wells experienced

• Gas migration and channeling issues• Expense and delay of remedial

cementing operations

Solution – Eight (8) iCem® service simulations run during a 2-hour meeting evaluating the following parameters

– Spacer volume – Wiper plugs– Rotation and reciprocation during pumping

operations– Pump rates– Centralization

Result– Spacer volume doubled over previous well

plans– Pump rates increased though still within

fracture gradient limits– Centralizers changed to ones that allow pipe

rotation– Cement bond logs were excellent / no

remediation required

Case History – Field Application


Mud Conditioning

ECD Management

Displacement Efficiency

Surge & Swab

Avoidance

Centralizer Selection

Casing Placement

Torque & Drag

Minimization

Achieve Top-of-Cement

Avoid Cement Contamination

Cement Sheath

Analysis

Cement Mechanical Properties

Slurry Design

Job PlanSummary

iCem® Service


Questions?

iCem® Service

© 2011 halliburton. all rights reserved. icem ® service achieving wellbore integrity with sound,...

Documents

temperature slide

contamination of cement

cement toc

specific cement designs

fluid density

reciprocation slide

gradient slide

monitoring icem service