Investigating the effect of hole size, bottom hole temperature, and composition on cement bonding quality of exploratory wells in Iran
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View abstract on PubMed
Summary
This summary is machine-generated.Optimizing cement formulation with liquid additives in smaller wellbore sizes improves cement bonding efficiency in Iran's exploratory wells. This enhances well integrity and productivity for future drilling operations.
Area Of Science
- Petroleum Engineering
- Geological Engineering
Background
- Well cementing is crucial for oil and gas well integrity and productivity, especially in challenging exploratory wells.
- Subpar cement bonding efficiency is a significant concern in exploratory wells due to unpredictable downhole conditions.
Purpose Of The Study
- To optimize cementing practices in Iran's exploratory wells.
- To investigate the impact of hole size and bottom hole temperature on cement bonding efficiency.
Main Methods
- Analysis of cement quality logs (CBL/VDL) from 21 exploratory wells (2012-2022).
- Design and implementation of a new cement formulation considering bottom hole temperature and gas migration control.
- Comparison of cement quality across different phases and additives used by three contractors.
Main Results
- Cement formulations with dominant liquid additives (dispersant, fluid loss controller, anti-gas migration, H.T. retarder) in the 5-inch liner phase showed superior bonding.
- Smaller hole sizes resulted in better cement bonding quality due to reduced fluid flow and turbulence.
Conclusions
- Liquid additives in cement formulations enhance bonding efficiency, particularly in the 5-inch liner phase.
- Optimizing hole size is critical for achieving better cement bonding.
- Findings provide valuable insights for improving wellbore integrity and productivity in Iran's exploratory wells.
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