摘要
采用单井标定地震相反演的方法,研究了松辽盆地北部深层烃源岩的展布特征。根据过井地震反射特征,并结合单井有效烃源岩厚度比值,将松辽盆地深层地震相分为4种类型:Ⅰ类地震相为火山岩反射特征;Ⅱ类地震相为煤的典型反射特征;Ⅲ类地震相为泥岩反射特征;Ⅳ类地震相为湖相碎屑岩反射特征。根据地震相分析结果,预测了深层烃源岩的展布特征,指出有效烃源岩分布主要受控于深层断陷发育规模,不同结构的断陷中烃源岩发育存在明显差异,其中沙河子组烃源岩是深层最主要的烃源岩,在各深层断陷中广泛分布,有效烃源岩厚度大;登娄库组二段烃源岩主要发育于西部断陷区,营城组烃源岩在东部断陷较发育,火石岭组烃源岩主要发育在徐家围子、双城断陷。
Based on single well-to-seismic facies calibration and seismic inversion, the distribution characteristics of deep source rock are analyzed in the northern part of the Songliao basin. The seismic facies of the deep layers can be divided into four types according to the seismic reflection data and the thickness ratio of effective source rock in single wells. The first seismic facies is the features of volcanic reflection, the second is coal reflection, the third mud reflection, the fourth lacustrin clastic reflection. On the basis of the seismic facies analysis, the distribution of the effective source rock in the deep layers is forecast. The distribution characteristics of the effective source rock are controlled by the developing scale of deep fault depressions, and they are various in different fault depressions. The source rock in Klsh is the main effective source rocks and is distributed widely in all the deep fault depressions and it has great. The source rock in K1dz is developed mainly in the western fault depressions, the K1yc source rock in the eastern fault depressions, and the J3h source rock in the Xujiaweizi and Shuangcheng depressions.
出处
《天然气地球科学》
EI
CAS
CSCD
2008年第2期204-209,共6页
Natural Gas Geoscience
关键词
有效烃源岩
地震相
断陷规模
深层
松辽盆地
Effective source rock
Seismic facies
Fault depression scale
Deep layer
Songliao basin.
