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为了加快古龙常家围子断陷区石油地质勘探,依据该区沙河子组的各种地震反射标志,选用了振幅,连续性,外部形态及内部反射结构4个地震参数,对古龙常家围子断陷区沙河子组进行地震相分析,并将地震相的平面展布特征与钻井及区域地质背景相结合,经过地震解释,把地震相转化为沉积相。结果表明:该区沙河子组沉积时期主要发育了扇三角洲-湖泊相沉积体系。
In order to speed up the petroleum geology exploration in Changjiaweizi fault depression area of Gulang, four seismic parameters of amplitude, continuity, external shape and internal reflection structure are selected according to various seismic reflection marks of Shahezi Formation in this area. The Shahezi Formation in the subsidence area is subjected to seismic facies analysis. The plane distribution of the seismic facies is combined with the drilling and regional geological background. After seismic interpretation, the seismic facies is converted into a sedimentary facies. The results show that the depositional system of fan delta-lacustrine facies mainly developed during the deposition of Shahezi Formation in this area.