泌阳凹陷老油区小圈闭储量挖潜研究与实践成果

Research and practical results on reserves tapping of small traps in the old oil area of Biyang Sag

泌阳凹陷已进入高成熟勘探阶段,开发整体进入特高含水期,可供稳产提效的挖潜空间有限。但泌阳凹陷为富油凹陷,其断层众多砂体变化频繁,形成了许多小型甚至微型的岩性圈闭及断块圈闭,这为油气挖潜提供了地质基础。采用录、测井资料与动态资料相结合,为发现小圈闭油气层提供线索,并进一步研究了小圈闭含油性评价方法,其中包括发现以往各项资料间矛盾层位、应用录井资料与动态资料重新建立测井解释评价标准、判断油藏边界可靠性、圈闭类比发现新的含油圈闭等,分别用于对老区重新进行解释评价,获得了较好的油气挖潜成效。

Biyang Sag has entered the stage of high maturity exploration with the overall development entering a period of ultra-high water cut,and there is limited space for potential tapping to stabilize production and improve efficiency.However,as an oil-rich sag,Biyang Sag has many faults and sand bodies that change frequently,forming many small or miniature lithological traps and fault block traps,which provide a geological basis for potential tapping of oil and gas.Data of mud logging and well logging are combined with dynamic data to discover hydrocarbon reservoir with small traps and study accurate evaluation methods for oil bearing in small traps,including the discovery of conflicting horizons between various data in the past,using mud logging data and dynamic data to rebuild interpretation and evaluation criteria for well logging,judgement of reservoir boundary reliability,and trap analogy to discover new oil bearing traps.This method is used to reinterpret and evaluate old oil areas,and good results in potential tapping of oil and gas have been achieved.