中高渗单层系调剖(驱)选井方法研究

Study on Profile Control Well Selection Method for Medium-high Permeability and Single Formation Reservoir

针对大港中北部油田中高渗、层系单一的特点,全面分析整理出影响中北部油田调剖(驱)实施效果的因素,共包括5大类45个,依据理论及经验对其重要性进行排序,再结合各因素之间的关联性以及获取的难易程度共选取10个因素作为最终调剖(驱)选井参数;采用数据统计方法,建立10项选井参数与实施效果的对应关系,根据对应关系的紧密程度对选井参数进行赋值,赋值的总乘积λ作为判断是否调剖(驱)的依据,该值越大调剖(驱)必要性越高,应优先考虑。随机选取中北部油田调剖(驱)井50口采用此方法计算λ值,λ值与实际增油量进行比对,其中40口井的λ值优先级与其增油量呈正相关,符合率达80%。

In view of the characteristics of medium-high permeability and single formation reservoir in the central and northern Dagang Oilfield,the factors affecting the profile control effect,including 45 factors in 5 categories are comprehensively analyzed,and their importance is sorted out by combining theory with experience.A total of 10 factors are selected as the final profile control well selection parameters based on the correlation between various factors and the difficulty of acquisition.By means of data statistics,the corresponding relationship between 10 well selection parameters and the effect of profile control is established.According to the corresponding relationship,the well selection parameters are assigned,and the total product of the assigned values λ is used as the basis for judging whether to perform the profile control or not.The larger the value,the higher the necessity of profile control,and priority should be given to.Fifty profile control wells in the central and northern oilfield are randomly selected to calculate the value of λ.The calculated value ofλis compared with the actual oil increment.The value of λ of 40 wells is positively correlated with the oil increment,and the coincidence rate is 80%.