水淹层地化评价技术应用

Application of geo-chemical evaluation technique in water-flooded zone.

随着油田开发工作的不断深入和老油田综合含水率越来越高,采用常规的分析手段对油层水洗程度、水淹程度、高含水期剩余油分布和原油组分的定量分析研究难度越来越大。特别是小层内,由于岩性变化大,非均质性严重,水洗程度极不均一,给稳油控水、提高采收率造成了较大的困难。精细研究小层内的剩余油分布,为有针对性地采取工程措施、提高采收率提供科学依据,是油田开发后期的重要工作。使用地化录井技术研究油层剩余油分布状况是对储集层研究的一个重要补充,它的应用价值体现在定量解释和评价方面,可以解决油田开发过程中的诸如剩余油饱和度、油层水淹状况等问题。

Along with constant deepening of oilfield development and higher and higher water cut in maturing field,it is very difficult to use ordinary analytic tool for quantitative analyses of water-flushed and watered levels of oil-bearing strata,residual oil distribution and crude oil contents in high water-bearing stage.Especially for minor layer,it brings larger difficulty to stable oil production and controlling waterflood,and increasing recovery ratio because of large lithologic variation,serious non-homogeneity and non-uniform water-flushed level.Finely studying residual oil distribution in minor layer,which provides scientific basis for adopting engineering measures purposefully and increasing recovery ration,is important job of later development in oilfield.Using geo-chemical log technique to study the residual oil distribution in oil-bearing strata is an important supplement to reservoir study.His application value lies on quantitative interpretation and evaluation,which can solve such issues as residual oil saturation and watered situation of oil-bearing strata during the oilfield development.