Lots of giant oil fields were discovered in the East part of Apsheron ridge where reserves are bearing in the structure accumulation. However, the fault pattern and structure feature are still in high ambiguity due to the complex tectonic setting and poor vintage seismic.
Contributed by recent high-quality 3D OBN seismic, the AI fault detection technology was used to illustrate this complex fault pattern with manual supervision. This study dedicates to demonstrate fault style and structure configuration from seismic response as well as multiple seismic attributes.
Its the first time that the fault pattern in Cheleken Peninsula was detailed delineated. Two typical fault styple, positive flower structure in the middle-deep red series, negavie flower structure in Apsheron-shallow red series were identified. These sets of structure pattern represent the transpression in early-middle Pliocene and trans-extension in the late Pliocene-Pleistocene. In the map view, fault assemblage performs as en-echelon and horsetail spray, which represents the dextral strike-slip of Apsheron ridge. The hydrocarbon accumulations are fault-derived structure which grow from middle Pliocene and still active now. Fault growth and development not only serve as hydrocarbon migration path to communicate the source rock and reservoir, but also influence the paleo-geomorphology, which further control the distribution of reservoir and litho-facies.
