摘要
针对AKM油田主力产层U-Ⅲ层沉积环境及岩性复杂、储层非均质严重、注水开发后含水率上升快、水淹严重、剩余油挖潜难度大等问题,在测井资料和生产开发数据分析的基础上,对U-Ⅲ层非均质性、水淹及剩余油分布特征进行了研究,并提出调整策略;对AKM油田高温高盐的储层特征,开展了配套堵水剂和络合型酸化解堵剂研究。研究表明,U-Ⅲ层剩余油以顶部剩余油为主,其次是井网控制程度低和注采不完善形成的剩余油;堵水剂封堵岩心后,岩心突破压力高于12MPa,岩心封堵率在97%以上;酸化解堵剂对高含钙岩心和钻井液、机械杂质等堵塞物均具有很强的溶蚀能力,岩心物模实验,渗透率提高率达到93.4%,酸化作用明显。制定剩余油挖潜综合调整策略,开展了5口井现场试验,措施后平均单井日产液量由122.7t下降为109.3t,平均单井日产油量由32.3t增加为72.3t,综合含水率由73.7%下降为33.9%,增油降水效果明显。
Due to the complex sedimentary environment and lithology,and the serious reservoir heterogeneity in U-Ⅲthe main production formation of AKM Oilfield,the water cut rises quickly,and the water flooding is severe after water injection,making it difficult to tap the potential of remaining oil.In order to solve the problems,the characteristics of heterogeneity,water flooding and distribution of remaining oil in U-Ⅲformation were studied based on the analysis of logging data and production data,and the adjustment strategy has been put forward.According to the characteristics of high temperature and high salinity of reservoir in AKM Oilfield,the matching water shutoff agent and complex acidizing plug removal agent were studied.The study showed that the remaining oil in U-Ⅲformation was mainly on the top of reservoir,followed by the remaining oil formed by low well pattern control and imperfect injection-production relationship.After plugging the core with water shutoff agent,the core breakthrough pressure was higher than 12 MPa,and the core plugging rate was over 97%.The acid plugging removing agent has strong dissolve ability to the high-calcium core,drilling fluid and mechanical impurities.Core physical model experiment showed that the permeability was increased by 93.4%,with obvious acidizing effect.A comprehensive adjustment strategy for tapping potential of remaining oil was made,and field tests in 5 wells have been carried out.After taking the measures,the average daily liquid production of single well decreased from 122.7 t to 109.3 t,the average daily oil production of single well increased from 32.3 t to 72.3 t,and the comprehensive water cut decreased from 73.7%to 33.9%,with obvious effect of increasing oil and decreasing water.
作者
杨宝泉
李琦
邓贤文
朱磊
高甲
Yang Baoquan;Li Qi;Deng Xianwen;Zhu Lei;Gao Jia(Production Technology Institute of Daqing Oilfield Limited Company)
出处
《采油工程》
2024年第1期57-61,82-83,共7页
Oil Production Engineering
关键词
剩余油挖潜
非均质性
高温高盐
增油降水
水淹
tapping potential of remaining oil
heterogeneity
high temperature and high salinity
increasing oil and decreasing water
water flooding
作者简介
第一作者:杨宝泉,1970年生,男,高级工程师,现主要从事采油工程技术及方案研究工作。邮箱:yangbaoquan@petrochina.com.cn。
