安岳气田高石梯区块上震旦统灯四段气藏动态监测及认识  

Performance monitoring and understandings on gas reservoirs of the Upper Sinian Dengying 4 Member,Gaoshiti block,Anyue gasfield,Sichuan Basin

作　　者：严鸿[1] 商绍芬 张铭[1] 季晓靖 Yan Hong;Shang Shaofen;Zhang Ming;Ji Xiaojing(Southern Sichuan Gas District,PetroChina Southwest Oil&Gasfield Company,Luzhou,Sichuan 646000,China)

机构地区：[1]中国石油西南油气田公司蜀南气矿,四川泸州646000

出　　处：《天然气技术与经济》2020年第4期5-11,共7页Natural Gas Technology and Economy

摘　　要：四川盆地安岳气田高石梯区块上震旦统灯影组灯四段气藏受地层剥蚀尖灭、岩性及构造等控制,为构造背景下的高温常压大型岩性—地层复合圈闭气藏。为了深化认识复杂气藏特征及气藏开发动态规律,实现气藏高效合理开发,以高石梯区块灯四段气藏为研究对象,从气藏试井、生产测井和流体分析等多方位开展动态监测。分析了气藏动态监测典型事例,并结合气藏地质认识及开发动态指出了气藏流体性质及分布特征、气藏储渗模式及开发方式。研究结果表明:①灯四段气藏为中含硫化氢、中含二氧化碳气藏,气藏划分为高石3储渗区、高石2储渗区和高石9储渗区3个储渗单元;②气藏未见明显的边水底水,高石1井产出液体来自于灯二段,部分气井存在井底污染;③气藏存在孔隙型、孔洞型、裂缝孔洞型3种不同的储渗模式;④利用动态监测调整配产工作制度合理。结论认为,对于大型岩性—地层复合圈闭气藏,全方位及多角度、多阶段及多类型地进行动态监测是正确认识复杂类型气藏开发特征及开发规律的有效手段,所形成的分析方法可以为类似气藏开发提供借鉴和参考。Most gas reservoirs of the Upper Sinian Dengying 4 Member,Gaoshiti block,Anyue gasfield,Sichuan Basin,are under the control of stratigraphic denudation pinchout,lithology,and structure.And they are large lithologic-strati⁃graphic compound trap reservoirs with high temperature and normal pressure under structural setting.In order to understand their characteristics and development performance laws and realize an efficient development,the performance monitoring was carried out for the Dengying 4 gas reservoirs in terms of well testing,well logging,and fluid analysis.Moreover,based on geological cognitions and development performance,not only the reservoir-fluid properties and distribution characteris⁃tics but also the reservoir-permeability pattern and development mode were presented.Results show that(1)the Dengying 4 gas reservoirs are featured by moderate content of both sulfur and carbon dioxide,and can be subdivided into Gaoshi 3,Gaoshi 2,and Gaoshi 9 reservoir-permeability zones;(2)in these gas reservoirs,there is no obvious edge and bottom water,the produced liquid in Gaoshi 1 well is from Dengying 2 Member,and some gas wells are contaminated at the bottomhole;(3)there are three reservoir-permeability patterns,including porous,vuggy,and fractured-vuggy types;and(4)it is reasonable to adjust a proration working system based on performance monitoring.In conclusion,the performance monitoring of all directions,and multiple angles,stages,and types is the effective means to understand the development characteristics and laws of large lithologic-stratigraphic compound trap reservoirs,and the method developed in this study can provide reference and guidance for the development of similar gas reservoirs.

关 键 词：四川盆地 安岳气田 高石梯区块 上震旦统灯四段气藏 动态监测 气藏特征 多维度 流体分布 试井 

分 类 号：P618.13[天文地球—矿床学]