Rock Physics Applications on Seismic-Based Reservoir Characterisation of the Gas Fields, Offshore Malaysia-Thailand Joint Development Area

Abstract

The A-J gas field requires the next phase of the drilling campaign, and identifying the new targets is required. So far, target identification is based on anomaly detection of seismic attributes together with geological concepts. The new thorough rock physics analysis is conducted to get a better understanding of rock within the area and, therefore, a better attribute selection for target identification. The rock physics analysis provides an insight of rock properties within the area and reveals the relationship between rock and seismic. The analysis also provides a better understanding in terms of geology. The analysis has suggested that the reservoir can be properly identified by using the far-angle stack related attributes. This includes relative acoustic impedance (rAI) and an extended elastic impedance (EEI). Validation of the attributes to the well has shown that the two attributes can help identify and define the reservoir within the area better. And the newly identified target from the study resulted in a better well targeting.