异常低压与油气田的分布规律

Anomalous Low Pressure and Distribution Law of Oil and Gas Field

在良好封闭压力系统这个前提下,产生异常低压的原因主要包括2个方面的作用:一是孔隙体积的增大,导致孔隙流体的压力降低。二是孔隙流体的减少。构造拉张的东部裂谷盆地,在中国含油气叠合盆地中异常低压的主要发育区;低渗透砂岩油气藏中的异常低压在鄂尔多斯盆地苏里格气田和乌审旗气田已经得到了验证;深盆气气藏在美国分布广泛。

Under the high quality pressure systems, anomalous low pressure can arise from two aspects： one is the increase ot pore volume; another is the reduction of pore fluid. Rift basin is the important anomalous low pressure oil and gas-bearing basin in the eastern China. Low-permeability sandstone Su Lige and Wu Shenqi gas fields of Edors basin are anomalous low pressure control system. Deep basin gas reservoirs are widely distributed in the United States.