Industry Article: Drilling Optimization Benchmark Set for Deep HP/HT Wells in Oman

PDO reduced drilling time by 25 days, saving the company $1.25 million per well

Drilling Optimization Benchmark Set for Deep HP/HT Wells in Oman
Publication: E&P
Publication Date: 08/01/2013

The primary target of a recent deep gas exploration campaign in the K-field of northern Oman is a tight Cambrian sandstone at 4,500 to 4,800 m (14,850 ft to 15,840 ft) true vertical depth subsea, where Petroleum Development Oman (PDO) has encountered a growing number of drilling challenges. In recent years increasing well complexity, deteriorating performance, escalating costs, and nonproductive time (NPT) meant that deep gas exploration in the field could have become uneconomic. To exploit these vital resources more efficiently, PDO needed a step change in drilling optimization. Implementing a series of optimization strategies led to dramatic improvements and set a new performance benchmark for subsequent projects in HP/HT tight gas drilling environments. Collaborative design, simulation, and optimization of bits and bottomhole assemblies under actual drilling conditions, combined with optimized drilling parameters and best practices in well delivery, resulted in dramatic performance improvements in the deep tight gas field.

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