摘要
油藏储集岩的储集空间、储集类型、储集模式、连通程度及压力敏感等性质,影响油藏开发动态特征、制定油藏开发技术策略,以及确定合理开发方式、井网、采油速度、油井产能等.分析了肯基亚克低渗透碳酸盐油藏的储层孔隙结构、渗透率、孔隙度的压力敏感性等.结果表明:储层岩石矿物成分以方解石为主,主要储集空间为粒内孔和粒间(溶)孔,以小喉道连通的孔隙和微喉道连通的孔隙占主导地位;储层渗透率属于典型的低孔特低渗透类储层,地层压力下降初期渗透率、孔隙度伤害严重,后期相对减弱;当地层压力下降10.00MPa时,渗透率压缩量为总压缩量的64.1%,孔隙度的压缩量为总压缩量的60.9%.
The reservoir rock properties include reservoir space, reservoir category, reservoir pattern, reservoir connectivity and pressure-sensibility, which influence the exploitation performance and work out technical strategy, the development manner, well network, rate of production and the productivity. This paper analyzes the pressure-sensibility for reservoir pore structure, permeability and porosity in abnormal high pressure and low permeability carbonate reservoir. As a result the main mineral component of reservoir rock is calcite, the main reservoir space includes innergranular pore and intergranular pore (intergranular dissolved pore), so the space connected by small throat and micro throat are dominant; the reservoir permeability is the typical low porosity and low permeability; in the early stage the permeability and porosity are seriously damaged by formation pressure degraded, but the damage is comparatively weak in the terminal stage; when the reservoir pressure drops to 10 .00 MPa, the permeability compressibility is about 64.1% and the porosity compressibility is about 60.9%.
出处
《大庆石油学院学报》
CAS
北大核心
2006年第2期134-137,157,共4页
Journal of Daqing Petroleum Institute
基金
中国石油天然气集团公司科技攻关项目(03b60205)
关键词
异常高压
特低渗透
孔喉结构
压敏
碳酸盐岩
abnormal high pressure
low permeability
pore throat structure
pressure-sensibility
carbonate reservoir
