Setting a record for finishing the drilling operation in No.08 Siahmakan rig (8-3/8" hole section)
The drilling of well No.08 in the Siahmakan project is being completed with a significant reduction in time compared to similar wells in this field and the two wells drilled last year.
According to the public relations report in PECO, the five old wells in the Siahmakan field were completed and ready to use, with an average duration of 400 days, considering the complex situation of this field, instability, great depth of the wellbore, and financial problems influenced by the disproportion of CBS. However, based on the lessons learned from the drilling operations of well No.06 and No.07, which started in 2021 and finished in 2022, the drilling operation in well No.08 will be completed in less than 180 days.
In well No.08, the drilling operation of the 8 3/8" hole section was successfully completed in 19 days. The 8 3/8" hole section is known to be time-consuming, troublesome, and expensive due to the great depth, wall instability of the well, and the drilling of Asmari and Pabdeh formations with a differential pressure of 3100 psi, which have a special effect on the situation. The drilling operations of well No.03 to 07 in this hole section were completed in 101, 45, 154, 179, and 91 days, respectively. By utilizing the valuable experience listed below, the drilling of this hole in well No.08 was able to achieve the new record:
- Utilizing the Optimization service
- Using NIF materials to consolidate Asmari formations and maintain wellbore stability
- Using LPM materials to prevent lost circulation
- Improving the mud situation, including controlling FL below 2 and using Glycol/KCL to prevent shale activation and pipe stock, along with using PHPA pile.
- Using minimum mud weight to reduce the risk of differential pressure sticking
- Using minimum mud weight to increase the rate of penetration
It is worth mentioning that this field has deep wells with high temperature and pressure, and unexpected and unpredictable formation behavior with geological uncertainties. Therefore, achieving such a time-saving is valuable.
Furthermore, the Siahmakan project has made significant physical progress, reaching 53% completion, making it the project with the highest physical growth among the 13 projects assigned in the second phase of the development plan by the National Iranian South Oilfields Company.
The Siahmakan oilfield development project is one of the projects undertaken by the National Iranian South Oilfields Company. The implementation of this project was contracted in May 2020, with PECO responsible for engineering, support, and procurement services as an EPC-EPD contractor for one of NISOC's Development Plan of 27 Reservoirs.
The EPD part of the Siahmakan oilfield development includes four Bangestan wells with a depth of approximately 5000 meters. The EPC part involves the preservation and production increase of the "Siahmakan Oil Field," aiming to raise the production rate to 10,000 BPD through the construction of the Siahmakan Booster-Cluster unit and the transfer of oil and gas via 16 km pipelines after separation for refining. Additionally, the construction of a 14 km flowline, reconstruction of the existing flowline, expansion of 14 km of 66KV overhead line with the outdoor substation, and construction of wellhead facilities are currently underway.
PECO, as one of the active companies implementing upstream package projects in the oil and gas fields, has been able to successfully carry out its current projects with the support of Iranian experts.