低渗透油藏精细注水产量劈分方法及应用——以安塞油田化108区块为例  

Production splitting method and its application of fine waterflooding in low permeability reservoir——by taking Hua-108 Block in Ansai Oilfield as an example

作　　者：田亚飞 乐平[1] 席家辉 刘万涛[2] 王庆利 张梨 TIAN Yafei;YUE Ping;XI Jiahui;LIU Wantao;WANG Qingli;ZHANG Li(State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu 610500,Sichuan,China;Changqing Oilfield Company,PetroChina,Xi’an 710018,Shaanxi,China)

机构地区：[1]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 [2]中国石油长庆油田分公司,陕西西安710018

出　　处：《石油地质与工程》2023年第5期70-75,共6页Petroleum Geology and Engineering

基　　金：四川省科技厅-四川省重点研发计划(2020YFQ0034);中国博士后科学基金面上项目(2019M650965)。

摘　　要：多层油藏的精细注水开发效果较大程度上取决于油水井产量劈分数据的准确性。科学合理的产量劈分计算方法是搞清油水井各小层产量贡献的基础,有利于制定合适的精细注水开发调整方案,改善低渗透油藏注水开发效果。基于安塞油田化108区块,对比了KH法、KHK法和突变法三种产量劈分方法在低渗透油藏精细注水产量劈分中的应用效果,总结了影响产量劈分系数的因素及变化规律;并结合数值模拟方法对比验证,优选出适合类似化108区块的低渗透油藏产量劈分方法。结果表明,针对化108区块含水饱和度较大的区域油井,可在不同阶段采用不同的产量劈分方法,其中突变理论劈分方法更能体现层间非均质性的影响,劈分精度高且考虑因素全面。此结论对于多层合采油藏注水开发后期的有效增产具有一定的借鉴意义。The effect of fine waterflooding in multilayer reservoir largely depends on the accuracy of production splitting data of oil and water wells.A better calculation method of production splitting is the basis for production contribution of each small layer,which is good to make a suitable fine waterflood development adjustment plan and improve the development effect in low permeability reservoirs.Based on Hua-108 Block in Ansai Oilfield,the application effect of three methods in low permeability reservoir,KH,KHK and mutation methods,was compared,and then influencing factors and its variation law were summarized.Combined with the numerical simulation,the method suitable for similar Hua-108 Block is optimized.The results show that for oil wells with high water saturation in Hua-108,different methods can be used at different stages,among which the mutation method with high splitting accuracy and comprehensive consideration can better reflect the influence of interzonal heterogeneity and has the best effect.This conclusion can provide a good guidance for efficient production in later stage of waterflooding development of multi-layer commingled production reservoir.

关 键 词：产量劈分 储量特征 开发特征 地质特征 影响因素 

分 类 号：TE328[石油与天然气工程—油气田开发工程]