Improving Well Integrity and Optimizing Production with In-house Cased-hole Data Analysis

An interactive petrophysics software for cased-hole analytics features a set of modules covering all key areas: cement evaluation, production logging, casing inspection and pulsed neutron analysis. 

Operators conduct geophysical surveys and logging while drilling to increase oil production. (Source: Aleksei Zakirov/Shutterstock.com)

Less exploration, more optimization: the global energy transition is driving fundamental changes in the oil and gas industry. Not least among those is the strategic move away from potential new developments and a much greater focus on making the most of existing assets.

Ross Brackenridge, technical manager with Lloyd’s Register said as the shift gathers pace, operators may increasingly look to take ownership of one specialist area of well technology: cased-hole data analysis.

Supporting well integrity, safety and production goals, cased-hole analysis has always had a role to play in helping operators meet their core objectives—and its status as a value-adding activity can only grow in a fast-changing industry environment.

It could be said that cased-hole logging and analysis has until now been something of a poor relation to its open-hole equivalent, and that is down to a variety of influencing factors. 

Open-hole logging—in effect, the process of acquiring representative reservoir data immediately after the well has been drilled and before it is cased and cemented ahead of production—conventionally took top billing when exploration and development activities were very much to the fore.

Cased-hole tools and techniques have long been available, serving to maintain oversight of the condition of the casing and cement as well as to support high-production performance through the provision and analysis of key downhole data. And they’re assuming greater prominence today in an industry increasingly defined by maturing assets.

Beyond enabling operators to monitor well integrity, expert interpretation of the logging data helps them determine well properties as they relate to production, from identification of downhole producing zones to the calculation of gas, water and oil volumes at each reservoir depth. It also serves to pinpoint production problems and subsequently support the formulation and execution of remedial actions.

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