渤海A油田水淹层射孔方案研究与实践  

Research and practice of perforation scheme for water-flooded reservoir in Bohai A oilfield

作　　者：何芬 He Fen

机构地区：[1]中海石油(中国)有限公司天津分公司

出　　处：《录井工程》2019年第3期143-147,190,共6页Mud Logging Engineering

基　　金：“十三五”国家科技重大专项“渤海油田加密调整及提高采收率油藏工程技术示范”(编号:2016ZX05058001)

摘　　要：在油田综合调整阶段,针对调整井大多会钻遇不同水淹程度油层,而开发初期制定的避边、底水的射孔方案已不能适用于水淹油层的射孔这一问题,建立了水淹层定量识别图板,根据油藏工程及数值模拟方法设计了机理模型,在结合实际数值模拟模型的基础上,进行水淹油层射孔优化研究,最终得到适用于水淹油层的射孔方案。研究结果表明:对于油层存在弱、中水淹的情况,不需要避射;对于强水淹油层,根据不同的油层厚度应该避射剩余油层的1/3,此时油井的累产油最高。在渤海A油田综合调整过程中应用该方法进行射孔方案的制定,投产的20余口调整井平均产能为93 m 3/d,平均含水率小于10%,取得了较好的调整效果,显示该方法对相似油田综合调整期间射孔方案的制定具有一定的参考价值。In the comprehensive adjustment stage of oil fields,aiming at the problem that most adjustment wells will be drilled into oil layers with different watered-out degrees,and the perforation schemes of avoiding edge water and bottom water made in the early stage of development cannot be applied to the perforation of the water-flooded reservoirs,and a quantitative identification chart of water-flooded reservoir is established.According to reservoir engineering and numerical simulation method,the mechanism model is designed.Based on the actual numerical simulation model,the perforation optimization of the water-flooded reservoir is studied,and finally perforation scheme suitable for water-flooded reservoir is obtained.The results show that there is no need to avoid perforating for weak and medium water-flooded reservoirs.For strong water-flooded reservoirs,one third of the remaining oil layer should be avoided perforating according to the thickness of different oil layers,at this time,the accumulative oil production of the oil well is the highest.In the process of comprehensive adjustment of Bohai A oilfield,this method is applied to make the perforation scheme.The average productivity of more than 20 adjustment wells put into production is 93 m 3/d,and the average water cut is less than 10%.Good adjustment effect has been achieved,which shows that the method has certain reference value for making perforation scheme during the comprehensive adjustment of similar oilfields.

关 键 词：水淹油层 避射 射孔方案 综合调整 数值模拟 

分 类 号：TE132.1[石油与天然气工程—油气勘探]