三肇地区扶余油层油气运移形式及供油气单元特征

OIL-GAS MIGRATION TYPE AND SUPPLYING UNIT CHARACTERISTICS OF FUYU OIL LAYER IN SANZHAO AREA

基于流体运动规律，建立了流体势的概念，并给出了计算公式。按流体势能等值线形状将运载层内油气运移划分为汇聚流、发散流和平行流三种形式；相应地划分出聚敛型、发散型和平行型三种供油气单元。据此对松辽盆地三肇地区中白垩统泉头组四段扶余油层各地质时期油气势能场分布特征进行了分析，并结合构造发育情况、储集层沉积和物性条件、盖层条件等因素，划分了供油气单元。结果认为：榆树林、宋芳屯和肇州地区是最有利的油气勘探区，升平、宋站地区是较有利的油气勘探区，朝长地区是较差的油气勘探区。

Based on the movement laws of fluids, the concept of fluid potential is set up and the computing formulae are obtained. The oil-gas migration of carrier layer is divided into three types of cealescence fluid, devergence fluid and parallel fluid according to the isotine patterns of the fluid potential. The distribution characteristics of oil-gas potential fields of Fuyu Oil Layer of K2q4 in Sanzhao area of Shongliao Basin in each geological period are analysed, combining the factors of structural development situation, the conditions of reservoir sedimentary properties and cap rocks. The study result shows that the regions of Yushulin, Songfanstun and Zhaozhou are good, the regions of Shengping and Shongzhan are better and Chaochang region is worse for surveying oil-gas.