Study on the Delineation of Potential Reservoir in Fractured Basement

Abstract

Unconventional oil and gas plays are one of Petronas' recent oil and gas exploration priorities. Unconventional reservoirs are those that require specialized production in addition to conventional operations. Therefore, fractured basement reservoir is considered to be one of the unconventional reservoirs with high exploration potential. Seismic identification of basement fractures is a challenge in current research. In the exploration of fractured basement reservoir, the delineation of fault and fracture network is very important. The key factor in the characterization of fractured basement reservoirs is the ability to obtain fractures from seismic data. The purpose of this study is to determine the optimal properties of the base fracture system. In this paper, the response of near and far prestack 3D seismic cube attribute extraction to X-base fracture reinforcement is compared. On the basis of the comparative analysis, the three-dimensional maximum curvature method, the variance edge method, the T * attenuation method and the equal frequency method can help the interpreter identify the possible high fracture areas. The interpretation of any one seismic cube as the best choice for the delineation of fractures is uncertain. However, the results show that in most cases, the application of attributes can be used to delineate the cracks close to superposition. Therefore, the identification of fracture zones can contribute to new exploration projects.