SYSTEMS APPROACH TO MANAGEMENT OF WELL · PDF fileSYSTEMS APPROACH TO MANAGEMENT OF WELL...

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SYSTEMS  APPROACH  TO  MANAGEMENT  OF  WELL  CONTROL Transforming Drilling for Compliance Beyond Macondo,  Houston, TX, April 2011 450 Gears Road, Suite 125 Houston, Texas 77067 +1-281-875-9860

Transcript of SYSTEMS APPROACH TO MANAGEMENT OF WELL · PDF fileSYSTEMS APPROACH TO MANAGEMENT OF WELL...

SYSTEMS APPROACH TO MANAGEMENT OF WELL CONTROLTransforming Drilling for Compliance Beyond Macondo,  Houston, TX, April 2011

450 Gears Road, Suite 125Houston, Texas 77067

+1-281-875-9860

What is a Systems Approach?

How can this improve management of well control? 

Systems Engineering integrates all the disciplines and specialty groups into a team effort forming a structured development process that proceeds from concept to production to operation. 

Systems Engineering considers both the business and the technical needs of all customers with the goal of providing a quality product that meets the user needs.

International Council on  Systems Engineering (INCOSE)

Not managed as a system

No single owner for entire process 

Many interfaces: Operator / Drilling Contractor / Service Contractor Onshore / Offshore Planning / Design / Execution Teams

Across interfaces, inadequate: Management of change Risk assessment Control of conflicts, gaps and overlaps

Prevention

Detection

Response

Recovery 

LESSONS LEARNED

Well

Subsurface Conditions

Surface Conditions

1. Modify well conditions

2. BOP Panel1. Drillstring2. BOP stack

Three part process: 

1. Screen to select critical wells

2. Develop model for critical wells

3. Audit against model

Process to rank various wells as to their relative well control risk Scoring / ranking based (among other things) on well  Complexity Subsurface Conditions Environmental Sensitivity Well Control Risk Blowout Scenarios Personnel Safety Surface Control Relief Well Risk Corporate Risk Acceptance for Significant Well Control Event

Preliminary Screening

Application to Well Control

HIGH IMPACTLOW PROBABILITY

(3)

HIGH IMPACTHIGH PROBABILITY

(4)

LOW IMPACTLOW PROBABILITY

(1)

LOW IMPACTHIGH PROBABILITY

(2)

PROBABILITY

IMPACT

Output from preliminary screening is score that places the well on Risk Matrix to  enable comparison with other wells drilled by operator or operator’s peer group

Risk of any individual well will be in relationship to other wells.

Application to Well Control

HIGH IMPACTLOW 

PROBABILITY(3)

HIGH IMPACTHIGH 

PROBABILITY(4)

LOW IMPACTLOW

PROBABILITY(1)

LOW IMPACTHIGH 

PROBABILITY(2)

OPERATOR –A 5 Low Impact / Low 

Probability Wells  (no additional work)

2 High Impact but Low Probability Wells (requires well design certification)

1 High Probability but Low Impact Wells (requires well design certification)

1 High Risk Well (requires well design certification & possible well control audit)PROBABILITY

IMPACT

1111

Basic review of the Well Design by a qualified 3rd Party Subsurface Conditions Casing  Drilling Operations  Evaluation / Testing Abandonment or Suspension

Performed on all but low risk wells Consists of reviewing the Operator supplied data Basis of Well Design Drilling Program Casing Design Geological Program Policies and Procedures

Hazard – Hydrocarbons In Formation

Hazard Event – Shallow Gas Well Kick / Flow 

Threat – Drill Into Gas Deposit

Consequence – Shallow Gas Blowout

Barrier / Control – Circulate Out Kick

Defeating Factors – Mud pumps fail

Basic Bowtie Elements

DRAFT

Influx of formation fluids into 

well

Application to Well Control

Completed Bowtie

Interface MgtInterface Mgt

Risk AssessmentRisk Assessment

MOCMOC

LeadershipLeadership

Audit based on bowtie barriers, including:  Operator & drilling contractor policies & procedures Well control critical equipment  Training and competency of personnel

Audit confirms that controls and barriers are in place and functioning

Audit program is extensive and recommended only for HIGH risk wells