储层孔喉结构参数与悬浮物粒径匹配关系  

The matching relation between the pore throat parameters of reservoirs and the particle diameters of suspended particles

作　　者：叶珏男[1,2] 唐洪明[2] 吴小刚[1] 王自力[3] 王滢[2] 

机构地区：[1]中国石化股份河南油田分公司勘探开发研究院,河南南阳473132 [2]西南石油大学"油气藏地质及开发工程"国家重点实验室,四川成都610500 [3]中国石化股份西南油气分公司川西采气厂,四川德阳618000

出　　处：《油气地质与采收率》2009年第6期92-94,共3页Petroleum Geology and Recovery Efficiency

基　　金：中国石油天然气集团公司中青年科技创新基金(06E1019)

摘　　要：悬浮物的质量浓度及粒径是注入水水质的重要指标,是造成地层损害的重要因素。在目前中国油田执行的行业标准中,对于渗透率大于600×10-3μm2的储层,笼统采用相同的水质标准不合适,给矿场水质指标优化带来一定困难。为了有效地保护储层,必须确定合理的水质指标,系统地研究悬浮物粒径与储层孔喉匹配关系。通过对渤海油区大量砂岩压汞曲线进行归纳,特别是对高渗透和特高渗透储层的孔喉结构参数进行了系统统计,结合过滤理论,提出了根据主流喉道半径优化悬浮物粒径中值的原则和依据。当悬浮物粒径中值小于1/10主流喉道时,才能能顺利通过岩石孔喉。根据孔喉分布大小和动态评价实验结果,推荐了不同类型渗透率储层允许通过的最佳悬浮物粒径中值:低—中渗透储层的最大值为2.5μm,中等渗透储层的最大值为3.0μm,中—高渗透储层的最大值为3.5μm,高渗透储层的最大值为4.0μm,特高渗透储层的最大值为5.5μm。The contents and particle diameters of suspended particles are the key indexes of injected water quality,and also the important factors of formation damage. There is no unified and subdivided water quality standard for the reservoir with the permeability above 600 × 10-3 μ m2in domestic standards. Rational standards must be known and the matching relation between the pore throat and the particle diameters of the suspended particles should be researched for effective reservoir protection. A large number of mercury intrusion curves of sandstones were summarized in Bohai Oilfield. The pore throat parameters of high and ultra-high permeability reservoirs with various permeability differentials were made statistics systematically. Median diameter of the suspended particles can be optimized through major throat radius based on filtration theory. When the median diameter of the suspended particles is smaller than the major throat radius,the particles can put through the pore throat of the rocks. According to the different pore throat structures and dynamic evaluation results,the best matching relation between different types of pore throats and median diameter of the suspended particles is:the maximum value is 2.5m in low-medium permeability reservoirs ,3. 0m in medium permeability reservoirs ,3.5m in medium-high permeability reservoirs ,4.0m in high permeability reservoirs and 5.5m in ultra-high permeability reservoirs.

关 键 词：孔喉结构参数 悬浮物粒径 水质指标 正交实验 储层 悬浮物粒径中值 

分 类 号：TE349[石油与天然气工程—油气田开发工程]