Study Of Neotectonic Movement In The East Part Of Bozhong Depression Based On High-resolution Multichannel Seismic Data

Since the Cenozoic, The eastern part of BoZhong Depression is one area ofBohai basin, with the most complex geological conditions and intense neotectonism.Tanlu and Zhangjiakou-Penglai faults go across the area. Since the Quaternary, manytimes of tectonic movement has taken place in the research area, forming a complexfracture system and tectonic framework region, which is still the most importantearthquake area in the eastern part of China. In the last decade, a series of regionaland medium-sized oil and gas fields have been discovered in Neogene reservoir, withadvanced (mainly since Quaternary), shallow, rapid accumulation characteristics. Thisarea is not only an ideal area for new tectonic movement research, but also an idealarea for hydrocarbon migration from the deep to shallow and accumulation reservoirduring the new tectonic movement period.In this paper, high-resolution multi-channel seismic data is used, with the basicrequirements for structural interpretation. The difficulties of seismic data processinghave been researched, such as multi-domain noise suppression, shallow multiplesuppression and high-precision velocity analysis. After high-resolution processing, theseismic section becomes better with higher signal to noise ratio and clear wavefeatures. The multiple waves have been suppressed well. Finally, the sections arequalified for high resolution explain.Using the basic principles of seismic stratigraphy, according the sequenceboundary characteristics, internal structure, amplitude and other signs of seismicfacies, seven major reflective surfaces(T0, T1, T2, T3, T4, T5, T6)have been identified.The BC-1hole is on the line. It is used as a control point, combined with oil seismicsection and logging data, Horizon calibration have been conducted and established aresearch stratigraphy framework of the area since the Quaternary. The new tectonic activity map has been drawn in the study area during theQuaternary using the multi-channel seismic interpretation, combined with previousresearch on fracture distribution since the Tertiary. Characteristics which have closelyrelationship with the new tectonic movement have been studied in detail, such asgeometric features, regions, sedimentary center changing, the natural characteristicsof earthquake. Finally, the accumulation and migration law of hydrocarbon has beenanalyzed according to the basic features of the new tectonic movement. Therelationship between the new tectonic movement and the eastern Bohai Sea oil andgas fields has been analyzed.The remarkable performance of the new tectonic movement is faulting, naturalseismic activity and activation of old faults. This paper has studied the new tectonicmovement formation mechanism of the study area. It has been theorized that deepthermal slip stress field superimposes on strike-slip field. In the study area, the time ofnew tectonic movement and source rocks expulsion is matched very well, forming aregion which is rich in oil and gas resources. The new tectonic movement plays animportant role in hydrocarbon accumulation. The result can provide meaningfulguidance for oil and gas exploration.