The Research Of 3D Seismic Data Acquisition Method On Xinglongtai Complex City Area

Xinglongtai-Lengdong area is one of the six blocks deployed in West depression of Liaohe Sag, which is located in the middle of West depression and covers Shuguang slope belt,Xinglongtai buried hill belt and Lengdong thrust belt from west to east. This area is Hydrocarbon Accumulation. As Xinglongtai buried hill is under the Panshan and Xinglongtai city area, it is difficult to get seismic data. Although we have done 3D seismic exploration in 1996-1997, the quality of mid-deep seismic data is poor because of the restriction of technology and equipment and the weak energy source. With the support of the present technology, software and equipment, Liaohe Oil Field Company re-conducts seismic data acquisition.The purpose of the research on 3D seismic data acquisition Method For Xinglongtai complex city area is that by studying the problems of the former seismic data; applying the new seismic exploration technology and method, to search a data acquisition method which will be adopted in further re-exploration; by application of result of research, to improve the quality of seismic data, to line out the layout of faults and configuration of section; to line out the Xinglongtai buried hill ;to line out the distribution of sandstones and structure–lithology traps, meeting the needs of the further seismic exploration.The research includes:(1)introduces seismic-geological conditions;(2)analyzing the problems of the former seismic data;(3)applying the acquisition design software, designed a reasonable acquisition geometry which will be used in designing of shooting and receiving parameter and static corrections. Took a research for shooting parameter(hole depth, quantity of dynamite per hole, dynamite type, shooting matter)in various of near surface conditions, designed suitable shooting parameters in different surface conditions, ensuring the energy and frequency width of seismic data, ensuring the data quality in S/N and resolution.;(4)designed a reasonable acquisition geometry on complex city area.By the research of 3D seismic data acquisition Method for Xinglongtai complex city area, primarily formed a set of new seismic exploration method suitable for the city area, which has wide worth of application. The practice result showed that S/N and resolution of new seismic sections which applied in the result of research has improved contrast former data, obtaining a distinct geological result. The article gave some suggestion and pointed out the new idea for future research.