oa Geophysical Reservoir Monitoring Technologies: Screening to Field Implementation for a Carbonate Field Undergoing Steam Injection

When it comes to geophysical monitoring of mature fields undergoing Enhanced Oil Recovery (EOR),<br>new challenges demand new ideas. However, with a myriad of products and solutions available for<br>reservoir monitoring, it is important to select technical solutions that increase value by either<br>‘illuminating’ oil that would otherwise be missed or by aiding in improving reservoir management by<br>increasing production and/or reducing risk to infrastructure.<br>Petroleum Development of Oman (PDO) has over the years developed a workflow to best assess, pilot<br>and implement such technologies. Here we share an example for a carbonate field in the North of<br>Oman that is scheduled for full field implementation of steam injection. For this field, PDO have piloted<br>several technologies, some of which have proven to be of value during the pilots and others that have<br>been rejected. The feasibilities which can involve field trials have included several geophysical<br>surveillance technologies include surface deformation through Satellite (InSAR) and GPS, microseismic,<br>VSP, permanent source and receivers as well as microgravity to name a few.<br>Here we present some examples such as field trials and design studies done to justify full field<br>implementation of technologies such as micro-seismic monitoring. We also show how based on some<br>analysis results we concluded to reject 4D seismic surveillance in this case. We demonstrate how<br>successful technologies were selected and how we hope they can aid in increasing the field’s oil<br>recovery and create additional value.