大芦湖油田高21块不稳定注水方式研究  

Transient Water Injection Pattern of Block Ga0-21 in Daluhu Oilfield

作　　者：马庆涛[1] 吴洁 马骁[2] Ma Qingtao;Wu Jie;Ma Xiao(Sinopec Shengli Petroleum Engineering Company Limited,Dongying,Shandong 257000,China;Sinopec Shengli Oilfield Company,Dongying,Shandong 257000,China)

机构地区：[1]中国石化胜利石油工程有限公司,山东东营257000 [2]中国石化胜利油田分公司,山东东营257000

出　　处：《特种油气藏》2019年第6期103-107,共5页Special Oil & Gas Reservoirs

基　　金：国家科技重大专项“渤海湾盆地济阳坳陷致密油开发示范工程”(2017ZX05072)

摘　　要：针对注采井间窜流通道导致大芦湖油田高21块油井产量快速递减、含水率迅速上升、剩余油分布不均的问题,利用流线模拟与模糊综合评判相结合的方法定量识别注采井间窜流通道,并通过现场示踪剂检测结果验证窜流通道识别结果的准确性。以此为基础,设计36种不稳定注水方案,优选不稳定注水方式。研究表明:流线模拟与模糊综合评判相结合可以定量识别水驱窜流通道;对称周期注水、短注长停注水、异步不稳定注水可以起到增油降水、扩大波及体积的作用。全区异步不稳定交替注水方案为技术、经济最佳方案,与常规水驱方案相比,累计产油量提高7.6×10^4m^3,净收入提高1074×10^4元。该研究为此类油藏的高效开发提供了重要的借鉴意义。In order to improve the rapid well production decline,sharp increase of water-cut and uneven remaining oil distribution of the Block Gas-21 in Daluhu Oilfield result from the challenging paths between the injection and production wells,the streamline simulation and fuzzy comprehensive evaluation were combined to quantitatively identify the channeling paths between the injection and production wells.Field tracer test data was taken to verify this channeling path identification.A total of 36 transient water injection schemes was designed to optimize the water injection pattern.Research indicates that the flowing channeling paths can be identified by the combination between streamline simulation and fuzzy comprehensive evaluation.Symmetrical cycle water injection,short-term injection with long-term shun-in and asynchronous transient water injection is capable of enhancing oil production,reducing water-cut and expanding swept volume.The asynchronous transient water injections scheme in the whole region is considered as the best technical and economic scheme.Comparing with the production performance of conventional water injection,the cumulative oil production is increased by 7.6×10^4m^3 and the net income is increased by 1074×10^4 yuan.This research could provide a significant reference for the efficient development of similar reservoirs.

关 键 词：窜流通道 低渗透油藏 流线模拟 示踪剂跟踪 不稳定注水 大芦湖油田 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]