摘要
曙一区馆陶组油藏为发育于馆陶组砂砾岩储层中的超稠油油藏,该油藏呈顶凸底凹的椭圆形偏长透镜体状,无统一的油水界面,无明显的盖层;在顶部与地层水接触区域原油粘度高、密度大、凝固点低,而油藏内原油粘度和密度相对较小、凝固点相对较高;分布于断层两侧和兴隆台油层剥蚀天窗正上方,与兴油源位置确定了油藏分布位置隆台油层直接接触。通过油藏空间分布特征和原油物性分析认为,控制油藏分布的主要因素为油源位置、原油的高密度特征、原油的高粘度特征和高凝固点特征。原油高密度、高粘度和高凝固点特征控制了原油的运移和聚集,使原油不利于运移的同时,由于自凝固圈闭而利于聚集成藏。
Reservoir in Guantao Formation of Guanyi area is a super-viscous oil reservoir developed in glutenite reservoirs of Guantao Formation, which is elliptic and long lanticular reservoir with top swell and lower concave without unified oil-water interface and obvious caprocks. Oil viscosity is high, its consistency is big and condensate point is low in the upper area contacting with formation water, while in the reservoir, oil viscosity and consistency are relatively low, condensate point is relatively high. It is distributed at both sides of a fault and over the corrosive window of Xinglongtai reservoir the positions of Xinglongtai oil source determines that it is directly contacted with the reservoir where it is distributed. It is considered from the analysis of reservoir space distribution and oil physical property that the major causes that controls the reservoir are the position, high oil density, high viscosity and high condensate point, by which the oil migration and accumulation are controlled and not beneficial for oil migration, while beneficial for oil accumulation because of its self condensation and traps.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2005年第5期563-565,共3页
Journal of Oil and Gas Technology
基金
国家自然科学基金资助项目(40572091)
关键词
曙光油田
馆陶组
稠油油藏
砂砾岩
储集层
Shuguang Oilfield
Guantao Formation
heavy oil reservoir
glutenite
reservoir
