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Formation Fluid Migration in Cementing Processes

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Formation Fluid Migration in Cementing Processes

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Questions and Answers

What factor is the risk of failure related to in cement systems?

Formation fluid migration

Ratio of cement tensile strength to Young’s modulus (correct)

Cement density

Presence of gas bubbles

How does the usage of flexible particles like rubber or thermoplastics affect cement flexibility?

No impact on flexibility

Decreases flexibility

Improves flexibility (correct)

Increases rigidity

Which type of gas migration occurs before the cement has set?

Delayed gas migration

Immediate gas migration

Short-term gas migration (correct)

Long-term gas migration

What can uncontrolled gas migration during cementing lead to?

Risk to equipment and personnel (C) Signup and view all the answers

What is the best way to prevent long-term problems related to gas migration?

Properly addressing gas migration in the initial design (A) Signup and view all the answers

What phenomenon is gas migration during cementing referred to as?

Immediate gas migration (B) Signup and view all the answers

Which zones should gas migration prevention be particularly considered for?

Zones with pore pressure greater than 13 ppg (B) Signup and view all the answers

What can the cost of remediating a gas migration problem far exceed?

Costs of active prevention (C) Signup and view all the answers

How can foamed cement enhance flexibility?

By showing improved flexibility (D) Signup and view all the answers

What does the ratio of cement tensile strength to Young's modulus indicate about the cement's resistance to failure?

Higher ratio means less resistance to failure (B) Signup and view all the answers