地层异常压力的定量评价方法  

Quantitative Evaluation of Abnormal Formation Pressure

作　　者：禹荣[1] 曾喜生[1] 许庆国[1] 

机构地区：[1]中原石油勘探局地质录井处

出　　处：《断块油气田》2001年第3期25-27,共3页Fault-Block Oil & Gas Field

摘　　要：地层异常压力是油气勘探中重要的研究课题。文中介绍了地层异常压力定量评价的 3种方法———当量深度法、比率法和伊顿法。当地层压力较低时 (压力系数小于 1 4 ) ,伊顿法和比率法的结果较为准确 ;当地层压力较高时 (压力系数大于 1 4 ) ,适合用当量深度法。这 3种方法都是建立在正常的压实曲线之上的 ,使用中应合理地选择压实参数 ,建立其正常的压实曲线。Abnormal formation pressure occurs widely in nearly all sedimentary basins, which is one of the most important subjects in oil and gas exploration.Three methods are laied emphasis on introduction,equivalent depth method, ratio method and Eation method. When the formation pressure is lower, in which its pressure coefficient is lower 1.4, the result of using Eation and ratio method is accurate relatively;when the pressure is high, in which the coefficient is more than 1.4, the equivalent depth method is available. Based on the normal compaction curve, compaction coefficient must be chosen reasonably, and found up really compaction curve.

关 键 词：地层异常压力 当量深度法 比率法 伊顿法 静水压力梯度 上覆压力梯度 油气勘探 定量评价方法 

分 类 号：P618.1[天文地球—矿床学] TE13[天文地球—地质学]