3D seismic survey data processing and interpretation by use of latest tools applied for discovery of new traps in Pleistocene deposits of Hovsan field

Abstract

<abstract> The paper is devoted to outlining of hydrocarbon traps in Absheron suite by use of seismostratigraphy, standardless classification, taxonomy and attribute analysis. The paper gives a brief description of area under the study, its geographical position and research history. Correlation of seismic horizons traced within interval of seismic record embracing Absheron suite has been analyzed in detail. It has been noted that Absheron suite is rich with oil and gas deposits, which has been evidenced by discovery of fields located near to the study area. Six seismic horizons were picked off within the limits of target deposits. The described methodology of study reveals the essence of applied standardless classification and taxonomy. Analysis of dynamic parameters of seismic record led to outlining of amplitude anomalies related to zones of development of stratigraphic traps attributed to unconformity surfaces. Three such zones have been outlined. Classification and taxonomy cubes have been designed for the interval of Absheron suite. The internal structure of studied series is well traced in sections of "Classification" and "Taxonomy". Classification results allowed to outline traps characterized by abnormal grouping of some classes. Three "bright spot" anomalies are outlined in the Absheron deposits. Seismic anomalies are well correlated with sedimentation environment favorable for evolution of stratigraphic traps. The area of anomalies is 10.1 sq.km in summary. Burial depth of these anomalies is 450–950 m. Earlier drilled wells did not recover studied anomalies. </abstract>