摘要
针对舞阳陆相盐湖凹陷特定的盐泥互层地层结构和盐岩封隔层的特殊性，从凹陷内异常流体压力的分布特征出发，探讨其形成的主要机理，浅部异常压力体系成困与快速沉降造成不均衡压实和构造挤压引起的压应力的增加有关，中部则主要与盐岩封闭性使泥岩中的流体在沉降过程中不能徘泄出而在欠压实泥岩中形成的压应力的增加有关，深部主要与凹陷快速沉降、水热增压和有机物转化成烃综合作用有关。
The main forming forming mechanism of the abnormal fluid pressure in Wuyang depression are studied through analyzing the distribution characteristics and combining with the specific stratigraphic structure of interbedded saltand mudstone and the specific characteristics of salt rock barrier layer in the depression. Genesis of the shallow abnormal pressure system is unequilibrated compaction resultcd from rapid subsidence and compressive stress incrcasement resulted flom structural compression, genesisof the medium abnormal pressure system is compressivestress increasement in uncompacted mudstone due to that salt rock barrier kept fluids in mudstone from discharging during subsidence; genesis of the deep abnormal pressure system is the result of rapid subsidence of the depression,pressure increasement due to groundwater heating-up and organic materials changing into hydrocarbon.
出处
《河南石油》
2000年第1期6-8,共3页
Henan Petroleum
