ArticleScientific reports2024
Investigating the effect of hole size, bottom hole temperature, and composition on cement bonding quality of exploratory wells in Iran.
Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Integrating NMR and machine learning for pore-type driven rock classification in the heterogeneous Asmari carbonate reservoirs.Scientific reports · 2025Article
- Integrating machine learning and geomorphic indices to assess tectonic geomorphology in the Karoun River Basin, Zagros, SW Iran.Scientific reports · 2025Article
- Challenges of drilling Iran's deepest surface hole in the saddle section of Changuleh oilfield with complex structure and pressure regimes.Scientific reports · 2025Article
- Reservoir characterization of Yolde Formation, Kolmani Field, Gongola Basin, Nigeria using pressure, temperature, PVT, and well log data.Scientific reports · 2025Article
- Visual investigation of swelling and migration behavior of bentonite and kaolinite clays at elevated temperature using micromodels.Scientific reports · 2025Article
- Experimental modeling of changes in geomechanical parameters of reservoir rock during water flooding operations.Scientific reports · 2025Article
- Optimizing polycrystalline diamond compact bit selection and drilling parameters for deviated wells in the Majnoon Field, Iraq.Scientific reports · 2025Article
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Authors and funding
6 authors.
Funding
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Abstract
The oil and gas industry's reliance on well cementing practices to ensure well integrity and productivity is a pressing concern, particularly in exploratory wells where unpredictable conditions can lead to subpar cement bonding efficiency. This study addresses the pressing issue of optimizing cementing practices in Iran's exploratory wells, ensuring better well integrity and productivity. The preliminary objective is to investigate the impact of hole size and bottom hole temperature variations on cement bonding efficiency in these wells. We analyzed cement quality logs from 21 exploratory wells in reservoir zones between 2012 and 2022 to achieve this. The study employed a systematic approach, using CBL/VDL and cement formulation to assess the quality of each wellbore section separately. We designed a cement formulation based on changes in bottom hole temperature and gas migration control and implemented it using three different contractors, each with unique additives. It allowed us to compare the quality of cement resulting from different phases and additives. Our results show that cement designed with dominant liquid additions in the 5-inch liner phase exhibits better bonding than formulations with increased powder form additives, specifically those containing a liquid dispersant, liquid fluid loss controller, liquid anti-gas migration, and liquid H.T. retarder for LNR 5 inch. Additionally, smaller hole sizes demonstrate better cement bonding quality due to reduced fluid flow and less turbulence. These findings have significant implications for optimizing cementing practices in the petroleum industry, particularly in Iran's exploratory wells. Overall, this investigation provides valuable insights for improving wellbore integrity and productivity by optimizing cementing practices, which can be applied to future drilling operations in Iran's exploratory wells.
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