摘要
采用X射线衍射、扫描电镜、压汞分析等方法分析了LD21-2油田馆陶组储层特性,并对储层敏感性进行了评价。试验结果表明,馆陶组属于高孔高渗储集层,孔隙类型主要为原生粒间孔,孔隙发育,连通性好;黏土矿物以伊/蒙混层为主,其次为高岭石、绿泥石和伊利石;储层存在强速敏、中等偏强水敏、中等偏强盐敏、弱酸敏、弱碱敏、中等偏弱应力敏,临界流速为0.25ml/min,临界矿化度为2500mg/L,临界pH值为7。钻采过程中入井流体应提高抑制性,生产过程中应控制合理的开采速度。
The reservoir characteristics of Guantao Formation in LD21-2 Oilfield are analyzed by X-ray diffraction,scanning electron microscopy and mercury intrusion analysis,and the reservoir sensitivity is evaluated.The test results show that Guantao Formation belongs to a high-porosity and highpermeability reservoir,its pore type is mainly the intergranular pores with pore development and good connectivity.The clay minerals are mainly composed of the interstratification of illite and montmorillonite,followed by kaolinite,illite and chlorite.The sensitivity evaluation indicates that there is a strong velocity-sensitivity,medium-strong water-sensitivity and salt-sensitivity,weak acid-sensitivity and base-sensitivity,and medium-weak stress-sensitivity.While the critical velocity is 3.6m/d,the critical mineralization degree is 2500mg/L,the critical pH is 7.Fluid into the well should be improved for its inhibitory in the process of drilling and completion,rational production speed should be controlled in the process of production.
出处
《长江大学学报（自然科学版）》
CAS
2017年第5期34-36,53,共4页
Journal of Yangtze University(Natural Science Edition)
基金
中国海洋石油总公司前期ODP研究项目(2016RCPS0055)
关键词
储层特性
敏感性评价
储层保护
黏土矿物
reservoir characteristics
sensitivity evaluation
formation protection
clay mineral
