Characterization of Transpressional Structure in Moattama Basin, Gulf of Moattama, Myanmar

Abstract

Moattama Basin in the Gulf of Moattama is underlaid by the southern branch of Sagaing Fault, a major active strike-slip fault of Myanmar. According to 3D & 2D seismic reflection data, the basin has undergone faulting by the interaction between dextral transtension and gravity-driven deformation. In the basin center, synchronous normal faults and anticlines are formed by the dextral reactivation of an earlier structure with an N-S trend, that anticline is a high potential prospective for hydrocarbons. To assess this potential, structural analysis using 3D seismic data and well data was carried out to determine the evolution and distribution of anticline that related to positive flower structure in the strike-slip fault zone. Understanding the relationships between anticline and positive flower structure is very useful in exploration within the oil and gas industry. Based on all data, anticline structures were interpreted by 3D seismic data. As a result, the three anticlines in the study area were mapped at Top Pliocene. This analysis shows all anticline structures interpreted as the upper part of positive flower structures that are related to dextral transtension and gravity-driven deformation from the Sagaing Fault. This anticline structure is very good trapped for hydrocarbon and flower structure movement can provide migration pathways for hydrocarbon.