Reference cells are used to simulate different downhole scenarios. Photo: IRIS.
Cement evaluation test facility
20.03.2017A test facility is constructed at IRIS to investigate the performance of cement evaluation logging technologies.
The DrillWell project at IRIS involves building a test facility that can establish reference conditions for cement logging and execute experiments to evaluate commercial and emerging logging technologies. Several downhole scenarios can be simulated at the test facility using a “cell concept” that ensures ease of use and low cost. Also, the cells can be arranged in quite a few ways depending on the logging technology tested, as well as mimicking different downhole scenarios.
Dave Gardner, senior project manager at IRIS, is working on the project.
- There was a close dialogue with the industry when designing the facility and preparations for several logging experiments are currently underway.
The test facility is part of the Plug & Abandonment target area at IRIS Energy and The Drillwell Center for Research Based Innovation. Overall objectives are reducing cost of well abandonment and improving upon the quality of operations. Further information regarding other projects can be found here: http://www.iris.no/research/energy/drilling-and-well-technology/plug-abandonment
Plugging a well requires that several barriers, usually sections of cement are present or placed in the well. The quality of these barriers is investigated using borehole cement evaluation logs. Bad cement must be replaced, and in many cases this involves removing casing to access areas of desirable plugging depth. A further complication is that current logging technologies are unable to get successful readings when they are run through the production tubing installed in the well. Consequently, more time is spent on removing/pulling the tubing. Understanding the logging response as well as finding possible solutions that can reduce the need for removing sections of casing (milling) and tubing are major problems in the industry that this project takes into consideration.
Dave Gardner. Photo: IRIS.