The analysis of tested pressure and the study of abnormal pressure characteristic in partial prospecting wells indicate that there exist various types of pressures in southwestern qaidam basin and abnormal overpressure in certain depth 摘要通过对部分探井测试压力的分析和异常压力特征的研究,发现柴达木盆地西部南区压力类型多样,在一定深度存在异常高压。
As a result of the fluid in the mudstone not effectively expelled because of the reducing of permeability in the side of mudstone , abnormal pressure is formed in the alternating layers of sandstone and mudstone . hydrostatic pressure is kept because the fluid of sandstone can be expelled easily 在砂泥岩互层中,泥岩中的流体因泥岩边部的渗透率降低而无法有效排出,形成异常超压;而砂岩中的流体较易排出,常保持静水压力。
Based on the study of the test pressure data , the acoustic time and the reconstrction of paleoformation pressure , through the study of abnormal pressure in the middle and western sichuan basin , it ' s shown that the distribution of stratum pressure differs greatly in different zones ; the evolution history of paleo - formation pressure has been restored according to the models of the evolution history of pressure , and it shows that there were two high pressure arouse , the first arouse in later jurassic and the second in erlier triassic , analyzing the relations between the excessive pressure distribution and the petroleum migration 摘要通过实测压力数据、泥岩声波压实研究、古压力恢复研究,对川西、川中地区异常压力在纵向、横向上的分布特点的分析,认?该区异常压力分布有明显的分区性;同时,依据异常压力的孕育史模型,恢复本地区的上三叠统古压力的形成与演化历史,认?上三叠统过剩压力高峰出现过两次,分别在晚侏罗世末和早第三纪末;最后分析了该区异常压力与油气运聚的关系。
Considering the genetic mechanisms of abnormal pressure of coal reserveoir in process of geologic uplifting , through quantitative simulation analysis on geologic uplifting process in qinshui basin and tabamiao district , the variety of fluid physical volume of coal reservoir causing pressure variety of coalbed gas is analyzed , which reflects the dynamic evolvement process of whole reservoir pressure in the process of geologic uplifting , resulting in conclusion that means the geologic uplifting process is an important mechanism of abnormal low pressure 摘要从煤储层在构造抬升过程中异常压力的成因机理入手,通过沁水、塔巴庙地区抬升过程的定量模拟研究,分析在整个抬升过程中煤储层流体体积的变化所引起的流体压力的变化情况,从而反映储层压力在整个构造抬升过程中的动态演化过程,得出“抬升过程是异常低压形成的重要机制”的结论。