3-D Observing System Design And Application In Urban Areas

In the whole process of oil exploration, seismic data acquisition is a very important step,which directly affects the accuracy of the follow-up work, the successful completion.In thedata acquisition process, the purpose of observing system design of the work area, is the mostimportant. Good observing system design to reduce the large number of unnecessaryworkload, and help reduce the expenses incurred in the many aspects of geologicalexploration; better observing system design also allows the staff know and master more detailabout the geological conditions of the work area; the information of the work area is moreaccurate interpretation and more accurate judgments.With the increase in the extent of oil and gas exploration, the exploration difficultycontinued to increase, geophysical exploration is facing many challenges, on the one hand, thefine geological targets (pinchout, minor construction, minor faults, etc.) require seismicacquisition accuracy as high as possible, and on the other hand, with the deepening of thedegree of geophysical exploration. Seismic data acquisition facing more and more villages,towns, fishing pond and other large obstacles. In these areas, had to take the offset, specialobserving system.From the basic attributes of the observing system， analysis of the advantages anddisadvantages of the current mainstream Observing System, and for the distribution of urbanobstacles, combined with the geological tasks, the needs of the acquisition target, thehigh-precision satellite photos are used to pre-designed points in indoors. the designmethod of3-D observing system in urban areas of optimal of adjustment the physical point,the formation of irregular3-D observing system. Repeatedly to adjust the design of observingsystems.through system test,from a comprehensive consideration of data quality, acquisitionprocess is feasible and safety. Keep a safe distance, select the appropriate dose to stimulate,take full advantage of the squares and green spaces to emplaced of source point. And then tothe field survey, and real-time analysis to adjust the observing system, to study how to ensurethat the excitation of an effective receiver and safety stimulate. considering the ground,underground factors to determine the technical solutions, and then in the obstacle region toachieve the expected seismic data.