吉林大情字井油田油气富集规律分析

Analysis of Oil and Gas Enrichment Law in Jilin Daqingzi Oilfield

由于受沉积、构造、断层、地层流体等多种因素的影响,造成吉林大情字井油田油藏类型多样、油水关系复杂,从而给油田勘探开发部署带来困难。文中着重分析本地区的油藏模式及其控制因素,建立油气富集模式,寻找油气潜力区块。遵循着“以好物性储层为切入点,看构造,追砂体,定圈闭;见到好油层追有利储集相带,见到好水层则追其高部位砂体分布”的原则,确定有利的油气富集范围。其成果不仅有利于寻找有利储集相带并指导勘探开发生产,同时对我国陆上类似的中低孔低渗油田的油藏认识和高效开发提供借鉴作用。

Jilin Daqingzi oilfield is a large-scale oilfield with multi-pay zone systems that made it one of important areas for production growth.Structure,faults,sedimentary,reservoir properties are defined as the main controlling factors of different reservoir forming after analyzing different factors of reservoir forming in this area which are classified as structure reservoir,lithology reservoir and complex reservoir.It is a real obstacle in the exploration and development because of these controlling factors.Accordingly starting from locating good physical property pay zone,then analysis structure,trace sand body,define trap. Trace reservoir facies belt if see good pay zone,trace upper distribution of sand body if see good water zone.With this principle,the paper defined favorable hydrocarbon concentration area according to reservoir type and oil-water level.Study presented in this paper are not only suitable for improvement of fluid interpretation and advice to exploration and development for the local case,but also a suggestive help to reservoir knowledge and high-efficient development of medium-low porosity,low permeability reservoirs of onshore oil fields nation wide.