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永安镇三维地震工区位于已勘探开发近20年的复杂断块油田区。野外地震数据采集采用条带状宽线观测方式;资料最终显示为50x50(m)网格的三维垂直剖面和4ms间隔的水平等时切片。利用三维地震资料控制构造圈闭面积近30km~2,布探井21口,其中19口井获工业油流,钻探成功率为90.5％。该区以往采用二维地震成果,布探井86口,其中空井20口,钻探见油成功率只有76.7％。可见在这样复杂的小断块区,采用三维勘探是非常必要的。三维勘探的断层位置准确,断块格局和构造细节清楚,便于在油田勘探和开发中使用。
Yongan Town, three-dimensional seismic work area is located in the exploration and development of nearly 20 years of complex fault block oil fields. Field seismic data acquisition uses stripline wide-line observations; the data is finally displayed as a 3-D vertical profile of a 50x50 (m) grid and a horizontal isochronous slice of 4ms. Using the three-dimensional seismic data to control the trapping area of nearly 30km ~ 2, cloth exploration wells 21, of which 19 were industrial oil flow, drilling success rate of 90.5%. In the past, two-dimensional seismic results were used in the area. There are 86 cloth exploration wells and 20 of them with empty wells. The drilling success rate of oil drilling is only 76.7%. Visible in such a complex small fault block area, the use of three-dimensional exploration is very necessary. Three-dimensional exploration of the fault location is accurate, fault block pattern and structure details clear, easy to use in the exploration and development of oil fields.