Rotary Steerable system results in step change in drilling performance-a case study

For S-15 and S-14 wells at South S Field, drilling of the 12-1/4” hole section became the longest tangent hole section interval of both wells. There were several challenges identified where hole problems can occur. The hole problems often occur in the unconsolidated sand layers and porous limestone formation sections of the hole during tripping in/out operations. Most of the hole problems are closely related to the design of the Bottom Hole Assembly (BHA). In many instances, hole problems resulted in significant additional drilling time. As an effort to resolve this issue, a new BHA setup was then designed to enhance the BHA drilling performance and eventually eliminate hole problems while drilling. The basic idea of the enhanced BHA is to provide more annulus clearance and limber BHA. The purpose is to reduce the Equivalent Circulating Density (ECD,) less contact area with formation, and reduce packoff risk while drilling through an unconsolidated section of the rocks. Engineering simulations were conducted to ensure that the enhanced BHA were able to deliver a good drilling performance. As a results, improved drilling performance can be seen on S-14 well which applied the enhanced BHA design. The enhanced BHA was able to drill the 12-1/4” tangent hole section to total depth (TD) with certain drilling parameter. Hole problems were no longer an issue during tripping out/in operation. This improvement led to significant rig time and cost savings of intermediate hole section drilling compared to S-15 well. The new enhanced BHA design has become one of the company’s benchmarks for drilling directional wells in South S Field.

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Thorough Analysis and Commitment for Improvement Led to a Step Change in the Drilling Performance on Valemon Field, North Sea

10.2118/191316-ms ◽

2018 ◽

Author(s):

Hany Ahmed Beeh ◽

Haitham Khalil ◽

Steven Leonardus Paulus ◽

Arun Tiku ◽

Bjarte Andre Karlsen

Keyword(s):

North Sea ◽

Step Change ◽

Drilling Performance

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Pentingnya Manajemen Data Pengeboran Untuk Meningkatkan Operasi Pengeboran Panas Bumi

Jurnal Nasional Pengelolaan Energi MigasZoom ◽

10.37525/mz/2020-2/264 ◽

2020 ◽

Vol 2 (2) ◽

pp. 47-61

Author(s):

Daniel Adityatama ◽

◽

Rizky Mahardhika ◽

Dorman Purba ◽

Farhan Muhammad ◽

...

Keyword(s):

Data Management ◽

Oil And Gas ◽

Data Management System ◽

Key Factors ◽

Drilling Performance ◽

Geothermal Fields ◽

Drilling Data ◽

Cost Efficient ◽

Geothermal Drilling

Drilling is one of the major cost components in geothermal exploration and development. Effective and cost-efficient drilling significantly contribute to the success of geothermal development. Key factors in reducing drilling costs are optimising operations, utilising manpower to its fullest potential, and also benchmarking with other drilling activities to evaluate one’s performance objectively. This is possible if the information regarding the previous drilling activities is stored and easily gathered and analysed before making plans for the drilling campaign. The importance of drilling data analysis and drilling data management have been a subject of study and discussion since the 1980s, but it is still not that common in geothermal drilling, especially in Indonesia. The purpose of this paper is to summarise the definition and examples of drilling data management in a more well-established industry such as oil and gas from various studies in the past, assess the advantages of having a proper drilling database or data management system, and how can the data be used for potentially improving future drilling operation. A case study of converting legacy data from previous drilling campaign of two geothermal fields in Java into a database is also discussed to demonstrate how legacy drilling data can be used to evaluate drilling performance.

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