Abstract: In the Linhe depression,there are only 8 wells,distributed unevenly and with imperfection of logging data,so that velocity spectra,derived from seismic exploration are the principal data of this study Based on thesedata,compaction curves and surplus-pressuure curves are constructed and the distribution of subsurface fluid pressure and the condition of oil and gas migration and accumulation in this area are studied.Though the accuracy of the estimation by using velocity spectrum is less than that by using sonic-logging data,however,the conclusions remain to be valid generally.It provides a new practical and feasible method to study compaction and fluid migration in the condition of less namber of exploratory wells.

摘要： 以地震勘探所得速度谱资料为基础,编制压实曲线与过剩压力曲线对临河坳陷有关压力分布及油气运聚条件进行研究.结果表明,虽未及以测井为依据的分析,但用于勘探程度较低、钻井较少地区进行与压实有关的研究比较现实可行.

关键词: 河套盆地, 临河坳陷, 泥岩压实, 油气运移, 油气聚集