摘要
早期聚合物驱无水驱或水驱的时间短,在动态历史拟合过程中,储层物性参数与聚合物物化参数的调整往往交织在一起,使得数值模拟的多解性问题更加突出。为解决该问题,按照早期聚合物驱现场实施的2种情况分别采取相应的历史拟合方法。对于先实施先导试验再进行扩大聚合物驱的情况,首先充分利用扩大注聚区的水驱阶段数据修正储层物性参数,然后利用修正后的地质模型进行聚合物参数拟合,最后将得到的聚合物参数应用于先导试验区或者没有注水就开始注聚的区块,进而修正储层参数以拟合生产动态。对于早期聚合物驱无注水阶段的情况,建议首先根据类比法或经验法,对岩心实验测定的聚合物参数进行修正,然后在储层参数可调范围内,最大范围地调整储层物性参数进行动态拟合;若无法拟合,再调整聚合物参数进行动态拟合,若有实际聚合物返排参数,可以先调整聚合物参数,再调整储层参数。将上述方法应用于渤海某油田,含水率拟合的成功率达90%以上。
In early-stage polymer flooding oilfields, there is no or very short water flooding period. During history matching of such reservoirs, the reservoir parameters and polymer characteristics all need to be adjusted at the same time, which lead to more serious multiplicity of simulation solutions. Correspondingly, different history matching methods are proposed according to 2 cases of early-stage polymer flooding. For those reservoirs, where polymer flooding are implemented from pilot test to field application, early water flooding data is used to revise reservoir geological model parameters, then, this model can be used to match polymer flooding history, finally, polymer parameters revised above are used in the polymer flooding region without water flooding. For those reservoirs, where polymer flooding are implemented without water flooding, analogy and empirical method can be used to revise the experimental polymer parameters, then, reservoir model geological characteristics are adjusted in reasonable range during history matching processes. In cases above, if the history matching results are not satisfied, polymer flooding parameters can be revised again. If field polymer hackflow parameters can be obtained, polymer characteristics adjustment can be made before reservoir parameters revision. The method above has been used in one Bohai Oilfield, in which water cut matching is over 90%.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2011年第2期55-57,114,共3页
Petroleum Geology and Recovery Efficiency
基金
国家"863"项目"渤海油田聚合物驱提高采收率技术研究"(2007AA090701)
关键词
早期聚合物驱
数值模拟
历史拟合
聚合物溶液物化参数
提高采收率
海上油田
offshore oilfield
early stage polymer flooding
numerical simulation
history match
polymer physicochemical parameter
EOR
