Combining Drilling and Evaluation Technology in Remote Operations Increases Reliability

Abstract:

Over the past decade several attempts and methods have been applied to ensure remote operations—from moving operations directly from offshore to onshore to a complete redefinition of work processes and responsibilities. This paper demonstrates how a different work methodology onshore improves the reliability in the total drilling and logging while drilling (LWD) operation, focusing on combining drilling and evaluation work processes and technologies.

This paper presents several cases where combining drilling optimization with LWD formation evaluation greatly enhances the understanding of the subsurface environment. The main goal is to optimize the drilling progress with regards to hole condition and reliability combined with optimum well placement.

The elements involved in this process include:

• Use of downhole drilling dynamics measurements and interpretation of these to determine required action to reduce any damage to the downhole sensors and to ensure the energy is used to penetrate new formation.

• Use of LWD data both for understanding the overall drilling regime and for optimum well placement.

In combination with LWD formation evaluation, any changes in the rock penetrated are instantly taken into the drilling optimization procedure, and parameters are then optimized to maintain maximum progress. In this way, the guesswork about changes in the rock properties is eliminated, and the correct action is implemented instantly. In addition to the downhole technology, the work flow procedures and distribution of responsibilities throughout the team will be explained. Strong collaboration between the different team members is essential to make this process work.