摘要
南翼山油田含油层系油砂山油组储层岩性为湖泊碳酸盐岩,岩石类型包括颗粒灰岩、颗粒白云岩、藻灰岩、泥晶灰岩、泥晶白云岩以及部分细粒碎屑岩,其中主要储层岩性为颗粒碳酸盐岩。由于湖泊水体能量弱,沉积的颗粒碳酸盐岩粒度细,储集层孔喉细小。研究区裂缝欠发育,储层的储渗性能较差。油田投产以来,油井产能低,水井注水困难,采油速度低,开发效益差。因此,强化储层孔隙结构微观研究和渗流特征研究,是提高油藏开发水平和最终采收率的关键。
The reservoir lithology of Youshashan Formation of oil-bearing series in Nanyishan Oilfield was lake-facies carbonate-rock. The rock types was composed of grain limestone, grain dolomite, algal limestone, micritic limestone, micritic limestone and a part of fine grained detrital rock, of which grain carbonate was main reservoir lithology. Due to the weak lake water energy, the size of deposited grain carbonate and pore throat of reservoir were fine, fissures were not well-developed and storage-permeation performance of reservoir was poor in this area. Oil well productivity and oil recovery rate were low, water well injection was difficult and development efficiency was poor. Thus, the key of raising reservoir development and ultimate recovery percent is to intensify microscopic study on reservoir pore structure and percolation characteristics.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2009年第3期42-45,共4页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40602013)
关键词
南翼山油田
新近系
湖相碳酸盐岩
储层特征
微观孔隙结构
渗流特征
Nanyishan Oilfield
Neogene
lake-facies carbonate-rock
characteristics of reservoir
micro-pore structure
percolation characteristics
