Study Of 3D Seismic Data Acquisition In Huanxiling Area Of Liaohe Basin

The study working area lies in Liaoning province, it divided four different zones from east to west by western slope zone,center ridgy zone,low-lying zone and eastern steep slope zone, Primary target layer of each zone has different geological character and oil store distributing characteristic.For acquiring high quality 3D seismic data of this area, by analyzing the geological task and acquisition requirements, details about the area for exploration, geography, geology, geological conditions in the shallow and deep earthquakes, compared to 3D exploration methods and data quality of adjacent work area in recent years, analysis records of single shots and processing section, refer to well data in the region, taken on some technical difficulties related to technical countermeasures; analysis and validation in combination with other data carefully, identified four typical points by establishing a geophysical model parameters, acquisition parameters were demonstrated, considering the demonstrated results, initially established for the 3D geometry in this area, in-depth analysis of the basis of source parameters, receiver parameters, instrument parameters, static correction work, experimental work (including test purpose, test point location, content, test data analysis),obtained 3D seismic acquisition method that could be complete the geology task efficiently and high quality.The acquisition method of application makes single shot record reflecting rich and high S/N, makes bandwidth over 2s achieve to 5-80Hz, to ensure the stack data speeds up to a 45Hz or more; makes processing seismic profiles'bandwidth over 2s achieve to 5-90Hz, dominant frequency to 45Hz , for further data interpretation and reservoir prediction information and lay a good foundation. Meanwhile, in order to facilitate a 3D seismic exploration and production, a key part of the construction: experimental work, near-surface investigations, survey, instrumentation, shooting work, receiving work, on-site processing, drilling and explosive work, raise the quality of evaluation work a number of technical requirements.