现代产量递减分析在高磨地区灯四段台缘带储层类型识别中的应用  

Application of modern production decline analysis to identify reservoir types in patform margin of Dengying 4 Member, Gaoshiti-Moxi area

作　　者：欧家强 江林蔚 梁锋 朱童 王立恩 吴宗蔚 李娟 杨洋 OU Jiaqiang;JIANG Linwei;LIANG Feng;ZHU Tong;WANG Li'en;WU Zongwei;LI Juan;YANG Yang(Northern Central Sichuan Gas Production Management Division,PetroChina Southwest Oil&Gasfield Company,Suining,Sichuan 629000,China;Geological Exploration&Development Research Institute,CNPC Chuanqing Drilling Engineering Company Limited,Chengdu,Sichuan 610051,China)

机构地区：[1]中国石油西南油气田公司川中北部采气管理处,四川遂宁629000 [2]中国石油川庆钻探工程有限公司地质勘探开发研究院,四川成都610051

出　　处：《天然气技术与经济》2022年第5期22-27,77,共7页Natural Gas Technology and Economy

摘　　要：四川盆地中部上震旦统灯影组四段台缘带气藏碳酸盐岩储集层非均质性强,生产井之间产能差异大。为了弄清影响该区气井产能的关键地质因素,为后续部署生产井提供依据,以川中北灯四段气藏储层为研究对象,根据岩心和成像测井等资料对储层进行了分类,分析了不同类型储层在生产井动静态资料上的响应,应用Blasingame现代产量递减分析法分析生产井的流动特征,计算储层参数和动态储量。通过分析结果与不同类型的储层对比,总结出了现代产量递减分析识别不同类型储层的方法。研究结果表明:(1)高磨地区灯四段台缘带储层可分为缝洞型、孔洞型和孔隙型3类;(2)缝洞型和孔洞型储层生产井在Blasingame曲线中表现出双重介质流动特征,缝洞型储层生产井计算动态储量更大,孔隙型储层生产井在Blasingame曲线中则表现为单一介质渗流特征,计算动态储量较小。结论认为:(1)缝洞型、孔洞型储层厚度是气井高产的关键地质因素;(2)现代产量递减分析在储层识别上准确性较高、实施成本低,可以在生产井中广泛应用,从而为不同类型储层开发技术对策和增产措施制定提供参考。In platform margin gas reservoirs of the Upper Sinian Dengying 4 Member, central Sichuan Basin,most carbonate reservoirs feature strong heterogeneity, leading to a greatly different productivity among producers.In order to figure out the main influential factors on this productivity and provide basis for next deployment,Dengying 4 gas reservoirs in the north of central Sichuan Basin were taken as objectives to implement reservoir classification according to core analysis and imaging logging data. Then, the response of various types of reservoirs to both dynamic and static data of producers was analyzed. Finally, flowing properties in producers were found out by means of one method of Blasingame modern production decline analysis, and reservoir parameters and dynamic reserves were gained and calculated. The method to identify reservoir types through modern production decline analysis was summarized on the basis of analysis results and comparison among different types of reservoirs. Results show that(1) the platform margin reservoirs of Dengying 4 Member in Gaoshiti-Moxi area can be classified into fractured-vuggy, porous-vuggy and porous reservoirs;and(2) producers in both fracturedvuggy and porous-vuggy reservoirs present double-porosity flowing characteristics in Blasingame curve, and their calculated dynamic reserves in fractured-vuggy reservoir are larger. The other producers in porous reservoir emerge single-porosity flowing natures in Blasingame curve, and their dynamic reserves are smaller. In conclusion, fractured-vuggy and porous-vuggy reservoirs are the crucially geological factors affecting the productivity.What’s more, the modern production decline analysis can conduct reservoir identification more accurately at low operation cost. Thus, it can be applied extensively to provide a reference for making technological countermeasures and stimulation measures for different types of reservoirs.

关 键 词：四川盆地中部 高磨地区 上震旦统灯影组四段 储层类型 现代产量递减分析 

分 类 号：P618.13[天文地球—矿床学]