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大民屯凹陷是中国北部辽河凹陷内发育于古近纪的四个裂陷型凹陷之一。本文在综合钻探、试井和地震资料的基础上,详细讨论了大民屯凹陷的压力与流体势特征。应用声波测井、试井和地震速度等资料研究了工区的压力特征。声波资料揭示,凹陷内泥岩压力特征可划分为正常压力、弱超压和强超压三大类。试并资料揭示,凹陷内储油层段的压力梯度多属静水压力梯度。研究区内大部分地震剖面具有高质量的速度测量数据。应用公式计算法预测了凹陷内47条代表
The Damintun depression is one of four rift-type depressions developed in the Paleogene within the Liaohe depression in northern China. Based on the comprehensive drilling, well testing and seismic data, this paper discusses the pressure and fluid potential characteristics of Damintun depression in detail. The pressure characteristics of work area are studied by using acoustic logging, well testing and seismic velocity data. The acoustic data reveal that the mudstone pressure characteristics in the depression can be divided into three categories: normal pressure, weak overpressure and strong overpressure. Experimental and data revealed that the pressure gradient in the reservoir section of depression mostly belongs to hydrostatic pressure gradient. Most seismic sections in the study area have high-quality velocity measurements. Using the formula calculation method to predict the depression in 47 representatives