Integrated Well Abandonment | Verify
Confirm isolation and barrier integrity
Accurately tag the placement of each barrier in the wellbore, evaluate the contents of the annulus, and run pressure tests at the surface.
PowerFlex and PowerEcho annular barrier evaluation services significantly extend the operating range of ultrasonic cement and casing measurement to provide certainty for drilling, cementing, well integrity evaluation, and well abandonment operations. This powerful family of services answers the need for robust and reliable data to quantify annular content and bond status and to confirm centralization and condition of the casing, especially for the growing number of wells with heavy well fluids and large-diameter, thick-walled casings.
PowerFlex and PowerEcho services integrate new mechanical designs and powerful new transducers to effectively receive pulse-echo and flexural wave signals despite significant attenuation in heavy muds, where conventional ultrasonic tools cannot function. Performance has been proved in mud weights from ultralight to exceeding 18 ppg.
New processing algorithms similarly extend PowerFlex and PowerEcho services to multiple casings up to a diameter of 22 in and thickness of 1 in.
Not only do PowerFlex and PowerEcho services greatly increase wellsite efficiency via faster logging speeds, but enhanced wellsite processing enables a turnaround time of 2 hours or less from acquisition to receipt of the field answer product.
Postprocessing can be conducted with either operators' in-house workflows or the Techlog wellbore software platform.
In addition to enhanced wellsite processing that powers an efficient 2-hour turnaround time from acquisition to answers, PowerFlex and PowerEcho annular barrier evaluation services provide multiple workflows that enable confidence and certainty in critical decisions.
PowerFlex annular evaluation service's flexural attenuation measurement pinpoints top of cement, solid sag, and casing position to guide efficient casing retrieval.
As the fields in the North Sea mature, many of wells undergo permanent well abandonment or permanent abandonment of a section of the well for consequent well sidetracking. Compliant procedures for well abandonment as per Norwegian Continental Shelf regulatory requirements necessitates the presence of double barriers to isolate permeable formations/sources of inflow.
In this paper, we present new ultrasonic cement evaluation technology developed and extensively field tested over the past years. The introduction of this technology increases reliability and efficiency, and enables well integrity inspection in extreme environments with heavy muds and very large and thick casings.
Now, more than ever, the integrity of the wellbore before the recommencement of drilling operations or production of reservoir fluids, is fundamental to safe operations. Stricter well control policies have been instated in recent years, so it is critical to perform casing inspection, and cement evaluation measurement surveys to ensure adherence to regulatory codes.
Ultrasonic and sonic logs are commonly used to evaluate the quality of cement placement in the annulus of a pipe and its potential to perform as a barrier. In some cases, we observe that the log response is in conflict with the expectations on the outcome of the cementing job that was executed without any major issues.