摘要
松辽盆地北部东区扶扬油层地层压力场具有明显的分区性。向心流区和越流区为正常压力区；离心流区为高压区；滞留区为低压区。地层压力的形成与演化主要取决于地层孔隙流体的供（液）－排（液）系统。区域水动力场的形成与演化是控制地层压力形成与演化和油气分布的关键因素，此外，天然气的漏失作用、蒸发作用、不稳定矿物的水化作用及地温下降作用，对地层压力场的形成与演化也起着重要的控制作用。
Abstract The pressure field in the Fuyang Formation can be obviously divided into 4 areas which are mainly controlled by the origin and evolution of hydrodynamic field. The pressures in centripetal and cross-formational flow areas are normal with the coefficients decreasing from 1. 02 to 0. 97 along flow direction, while the pressure in centrifugal flow area is dominated by overpressures, with the coefficients decreasing from 1. 30 to 1. 06 along flow direction, being normal pressures towards its rim, and motionless area is dominated by subpressures with the coefficients of 0. 96～0. 75. The pressures are related with the recharge-discharge system of pore fluids and pressure field is also influenced by (1) gas escaping, (2) evaporation of water, (3) hydration of unstable debris, such as feldspar and volcanic fragments, (4) unloading caused by bed evasion, and (5) geothermal decrease.
出处
《石油实验地质》
CAS
CSCD
北大核心
1995年第1期42-46,共5页
Petroleum Geology & Experiment
