Toson油田井网部署及实施效果评价  

Well pattern deployment and its implementation effect evaluation for Toson Oilfield

作　　者：毛伟[1] 霍立锋[1] 张君[2] MAO Wei;HUO Lifeng;ZHANG Jun(Exploration and Development Research Institute,Daqing Oilfield Co Ltd.,Daqing 163712,China;No.1 Oil Production Plant of Daqing Oilfield Co Ltd,Daqing 163111,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司第一采油厂,黑龙江大庆163111

出　　处：《大庆石油地质与开发》2020年第2期42-47,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“特低渗油藏有效开发技术”(2011ZX05013-006)。

摘　　要：Toson油田为复杂断块油藏,平均地层倾角16.0°,平均渗透率9.8×10^-3μm^2,平均含油面积1.19 km^2。针对地层倾角大、物性差、含油面积小等特点,不同断块区别对待,进行开发层系、井网、井距、注水方式优化。依据单井产量下限,确定采用一套层系进行开发;技术、经济角度综合考虑,确定合理井距为220~300 m;依据断块形态及地层倾角,优化井网及注水方式,极窄断块采用“之”字形井网、边部注水方式,宽缓断块采用三角形井网、边部加点状注水方式。方案实施后取得了较好的效果,油藏构造、储层认识基本符合实际,构造格局未发生大的变化,有效厚度具有高部位较大、向低部位逐渐减小的特点。开发方式、层系划分及注采井网设计基本适应,有20个月左右的稳产期,受效井比例70%,预测产量基本符合油田实际。Toson Oilfield is the complex fault-block oil reservoir with an average formation dip of 16.0 degrees,an average permeability of 9.8×10^-3μm^2 and an average oil-bearing area of 1.19 km^2.In view of the characteristics of the large dip angle,poor physical property,small oil-bearing area and so on,different fault blocks were treated differently,and the layer series of development,well pattern,well spacing and water injecting mode were optimized.According to the lower limit of the single well production,a set of the layer series of development was determined;Considering the technology and economy comprehensively,the reasonable well spacing should be determined at 220~300 m;According to the fault block shape and formation dip angle,the well pattern and water injecting mode were optimized.Especially the narrow fault block adopted zigzag pattern and edge water injecting mode,while the wide and gentle fault block adopted triangular pattern and edge plus scattered water injecting mode.After the implementation of the developing plan,much better effets have been achieved,the reservoir structure and knowledge are basically in line with the actual situation,the structural pattern has not changed greatly,the net pay is characterized by more thickness in the high position and gradual decreasing to the low position.The developing mode,layer series division and injection-production well pattern design are basically adapted,there is a stable production period of about 20 months,and the proportion of the response wells is up to 70%,the predicted production is basically in line with the actual case.

关 键 词：Toson油田 开发层系 井网 井距 注水方式 产量 

分 类 号：TE32[石油与天然气工程—油气田开发工程]