流体间歇压裂运移──石油初次运移的重要方式之一

INTERMITTENT FRACTURING MIGRATION OF PORE FLUIDSONE OF THE MAJOR REGIME OF PRIMARY MIGRATION OF PETROLEUM

将济阳拗陷已成熟但未排过油的烃源岩样品粉碎、加水，在近似地层的温度和静岩压力下，用专门设备──油气生成运移模拟系统模拟流体运移。通过对模拟产物及济阳坳陷一系统地层剖面样品的物性及地化参数的分析与对比，揭示了在沉积岩达到某一深度后，流体是以流体间歇压裂泥岩的不连通孔隙，形成间歇流的方式进行初次运移，并对问歇流的特征进行了讨论，指出它是石油进行初次运移的重要方式之一。

Matured source rock samples in which the oil is not expelled,in Jiyang sag is crushed and water is added. Samples processed as above is put in a specially designed device for simulatingoil and gas generation and migration to simulate the migration of pore fluids systemmatically, under temperature and pressure at a level near to the reservoir conditions. By an analysis and comparison between the products in the simulation test and the physical propertiesand geochemical parameters of the samples taken from a profile in Jiyang sag, authorsdemonstrate that after a certain depth of burial was reached, primary migration of the porefluids will occur in a intermittent flow through fractures induced by internal pressure in thepore space. The characteristics of intermittent flow is discussed. It is demonstrated that intermittent flow is one of the major form of primary migration of the petroleum but is not the only way.