平衡剖面技术在明水－绥化地区构造演化恢复的应用

基于平衡剖面技术,在实际地震资料解释的基础上,对松辽盆地明水-绥化地区4条主要测线进行了平衡恢复,并计算各演化阶段伸展量、伸展率和伸展速率,从而研究各构造演化阶段的特征.研究表明:研究区火石岭-营城期为断陷强烈扩张阶段,登娄库期为断陷向坳陷转化阶段,泉头-嫩江期为稳定的坳陷沉积阶段.嫩江组沉积末期由于受到区域挤压应力作用,发生构造反转,研究区中部隆升形成背斜带,形成现今的构造格局.明水-绥化地区经历了完整的伸展盆地演化序列,晚白垩世形成的绥棱背斜带是油气聚集的有利场所.

Application of Balanced Cross Section to Structural Evolution and Reconstruction in Mingshui-Suihua Area

Based on the method of the balanced cross section and seismic data interpretation,four seismic profiles from Mingshui-Suihua area in Songliao Basin were balanced and restored and extension quantity,rate and rate of speed were calculated.Thereby,characteristics of different stages of structural evolution were studied.The result of study shows that in region of interest,it is a stage of intensively extended fault depression during Huoshiling to Yingcheng period.Denglongku period is a stage of transformation from fault depression to depression.It is a stable stage of sedimentary depression during Quantou to Nenjiang period.The inversion mainly occurred in late Nenjiang period because of regional compression,making the anticline belt formed in middle part,and structural framework nowadays was formed.The whole structure evolution in the study area is a complete evolution series of an extensional basin and Suileng anticlinal belt formed in Late Cretaceous is a favorable zone to accumulation of hydrocarbon.