IMPROVING THE RELIABILITY OF OIL AND GAS WELL CEMENTING WITH THE APPLYING OF COMPOSITE PLUGGING SYSTEMS
SOCAR PROCEEDINGS, no.3, pp.59-69, 2025 (ESCI, Scopus)
- Publication Type: Article / Article
- Publication Date: 2025
- Doi Number: 10.5510/ogp20250301097
- Journal Name: SOCAR PROCEEDINGS
- Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, Compendex
- Page Numbers: pp.59-69
- Keywords: cement stone, cementing, plugging mud, strength of cement stone, well
- Open Archive Collection: Digital Heritage Collection
- Azerbaijan State University of Economics (UNEC) Affiliated: No
Abstract
Hydrocarbon production at fields with hard-to-recover reserves in complex mining and geological conditions requires solving complex reinforcement problems, the key one being ensuring high-quality delineation of productive horizons. The aim of the work is to evaluate and test the DRCT (Commercial name of plugging material) composite plugging material, which has improved performance characteristics for reliable well support and effective formation isolation, taking into account the quality of the cement stone. The influence of drilling fluid impurities on the structure of the cement stone was studied. It was found that their presence causes defects in the microstructure and insulation screen, which was confirmed by Radial Bond Tool (RBT) measurements in test wells.Testing was carried out on cementing slurries based on DRCT and Portland cement PCT I-100, prepared with fresh water containing 20% sodium chloride. The results of the studies showed the superiority of DRCT in terms of rheological properties, strength and brittleness of cement stone. Quantitative elemental analysis and X-ray phase analysis (XPA) of DRCT cement stone were performed. The structural formation features and strength characteristics were studied over eight years of operation in aggressive environments. The material proved to be highly resistant to degradation and maintained its strength in difficult conditions.Examples of recipe development and successful testing of DRCT material in wells confirmed its technological feasibility and effectiveness in complex reinforcement.