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地层水特征是研究盆地演化及稠油分布的重要因素.稠油在辽河盆地已探明的石油储量中占有重要比例,地层水化学场研究是预测稠油分布的基础,利用地层水地球化学特征和同位素资料研究地层水来源,分析水介质条件对原油降解稠化的影响.研究表明:西部凹陷地层水的矿化度和离子构成受深度控制,具有“垂向流”特征;其化学组成及变化规律的差异反映了不同地区地表水注入强度及局部地下水运动特征的变化,地表水注入强度及运动特征的差异是原油生物降解程度不同的主要原因,地下水的循环特征决定了其化学条件和原油生物降解程度,地表水淋滤作用是降解型稠油发育的必要条件.
The characteristics of formation water are the important factors to study the evolution of the basin and the distribution of heavy oil.Heavy oil occupies an important proportion in the proven oil reserves in the Liaohe Basin and the study on formation hydration field is the basis for predicting the distribution of heavy oil.Based on the characteristics of formation water geochemistry And isotope data to study the source of formation water and analyze the influence of aqueous media conditions on the degradation and thickening of crude oil.The results show that the salinity and ion composition of formation water in the western depression are controlled by depth and have the characteristic of vertical flow, The difference of composition and variation reflects the variation of surface water injection intensity and local groundwater movement in different areas. The difference of surface water injection strength and movement characteristics is the main reason for the different degree of crude oil biodegradation. The cycling characteristics of groundwater determine its chemical conditions And the degree of crude oil biodegradation, surface water leaching is a necessary condition for the development of degraded heavy oil.