摘要
根据苏丹6区、哈萨克斯坦北布扎奇、中国胜利孤岛等7个油田早期生产和测试资料，建立了比采油指数与流度的关系曲线，得到其斜率即比采油指数系数值，基于该值将7个油田分为3类：第一类，比采油指数系数为0．0543-0．0679，属于正常范围；第二类，比采油指数系数小于0．0543，低于正常范围，表明储集层可能受伤害比较严重；第三类，比采油指数系数大于0．0679，高出正常范围，这类储集层多为疏松的砂岩油层，在建立渗透率解释模型时应该结合岩性及生产动态资料进行修正。利用比采油指数系数的变化，可以评价稠油油藏携砂采油后是否已形成蚯蚓洞；对于一般砂岩油藏，也可以用比采油指数系数的变化来评价和分析油井增产措施效果；利用比采油指数系数概念还可以对油田开发生产能力作出早期评价。
According to the early production and test data of the Sudan Block 6, North Buzachi in Kazakhstan, Gudao of Shengli in China, and other 4 oilfields, the relationship between specific productivity index and mobility is established. The ratio of specific productivity index to mobility is the coefficient of productivity index （COSPI）, according to which, the 7 oilflelds are classified into three grades. The COSPI values between 0. 0543 and 0. 0679 are in the normal rangel those of less than 0. 0543 are below the normal range indicating that the formation is harmed seriously; and those of more than 0. 0679 are beyond the normal range indicating that reservoirs are loose sandstone. In establishing a permeability model, reservoir rock properties and well production data should be used to correct it. COSPI variation can be used to tell whether the formation forms worm-holes or not after sand-carrying oil production. For ordinary sandstone reservoirs, the coefficient can also be used to analyze the stimulation effects of wells and estimate the early productivity of oilfields.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2007年第6期745-749,共5页
Petroleum Exploration and Development
基金
中国石油天然气集团公司科研生产攻关项目"苏丹6区稠油冷采应用配套技术研究"(03KJ0301)
哈萨克斯坦北布扎奇开发方案(联合研究项目)
关键词
比采油指数系数
渗透率
孔隙度
疏松砂岩
蚯蚓洞
措施效果
测井解释模型
油田开发早期评价
coefficient of specific productivity index
permeability, porosity, unconsolidated sandstone
worm-hole
stimulation effects
log interpretation chart model
evaluation of early field development
作者简介
吴向红（1964-），女，重庆人，中国石油勘探开发研究院高级工程师，主要从事油藏工程和数值模拟研究。地址：北京市海淀区学院路20号，中国石油勘探开发研究院海外研究中心，邮政编码：100083。E—mail：wxhong@petrochina．com．cn
