Abstract

This paper describes the procedures and steps implemented in the introduction and the instigation of a Drilling Performance Analysis Workflow. The task of drilling performance or offset analysis is paramount to the understanding and enactment of a successful drilling campaign, conversely in order to gain exceptional knowledge and profound understanding of problems root cause and the interdependency of the individual relationships a more comprehensive methodology has to be employed.

An Operator experienced several BHA failures in multiple and sequential runs that generated significant non productive time NPT within the multimillion dollar operation. Traditionally, the root cause analysis of a problem follows a certain path involving confirmation by the equipment manufacturing centre that the tools were prepared to specifications, while in parallel the drilling engineers scrutinize the environment where the tools were used and attempt to identify the culprit(s). The conclusion may combine the two findings, nonetheless our observation was that this is not generally the dominant outcome.

Hence, we embarked on developing a unique multifaceted workflow to tackle these inadequacies utilizing several 3-D and 4-D simulation and analysis tools. Individual workflows were established focusing on understanding the interrelated events and using 3D/ 4D modeling tools to relate events in the context of the environment and the interdependency of the BHA behavior and the milieu including exacerbating weather conditions. The software technology integrates data from various databases and organizes it in ways that aid visualization. Any particular areas of interest can be further examined thoroughly looking simultaneously at the geological references, telectric logging data, drilling parameters, and weather conditions all at a glance. The unique arrangement allows offset data from previous wells to be examined concurrently while the subject well is being drilled to assess the timeline of the issue or the recurring possibilities.

Utilizing the software to gather the information and assemble it in a manner that allow the engineers to spend more time analyzing the outcome rather than gathering and arranging data is a significant achievement on its own. The benefits extend to create a system of ownership with accountability for all involved personnel at the base who prepare the tools, at the office who plan and follow up the daily operations, and those who execute the plans at the wellsite.

The approch was proven to add significant value, with the next two well section drilled without any issues avoiding and improving the operator's time versus the planned authority for expenditure (AFE).

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