摘要
川东北地区须家河组三段钙屑砂岩储层大多需要酸化压裂改造才能获得产能,微裂缝、裂缝发育对改善储层的储集性和渗流性起到非常重要的作用,也是储层有效性评价的基础。利用常规测井资料建立了三孔隙度指数法和时频分析法来识别裂缝,同时,综合成像测井资料形成钙屑砂岩储层的裂缝识别模式。结合测试资料,利用裂缝孔隙度、张开度及裂缝密度等参数来综合评价裂缝有效性,探索并建立了川东北地区钙屑砂岩储层综合评价标准,在油田的现场应用中取得了良好效果。
In the northeastern Sichuan Basin,most of the calcareous sandstone reservoirs of the third member of the Xujiahe Formation require acid fracturing to be productive. Microfractures and fractures serve a critical role in enhancing reservoir storage and permeability,as well as serving as the foundation for evaluating reservoir effectiveness. To identify fractures,a three-porosity index method and a time-frequency analysis method were developed using traditional logging data. At the same time,comprehensive imaging logging data was used to establish a fracture identification model for calcareous sandstone reservoirs.To completely evaluate the fracture efficiency,parameters such as fracture porosity,openness,fracture density,etc.,were used combined with the test data,and a comprehensive evaluation standard for calcareous sandstone reservoirs in northeastern Sichuan was researched and established. Field applications in oilfields have yielded good results.
作者
袛淑华
袁龙
张荣新
葸春平
曹原
贺彤彤
DI Shuhua;YUAN Long;ZHANG Rongxin;XI Chunping;CAO Yuan;HE Tongtong(Logging Application Research Institute,China Petroleum Logging CO.LTD.,Xi'an 710021,China;Changqing Branch Company,China Petroleum Logging CO.LTD.,Xi'an 710021,China;Ninth Oil Production Plant,Petrochina Changqing Oilfield,Yinchuan750000,China)
出处
《复杂油气藏》
2022年第1期23-29,共7页
Complex Hydrocarbon Reservoirs
基金
中国石油天然气集团公司“十三五”科技重大专项“低对比度油气层测井识别技术研究与应用”(2019D-3809)。
关键词
钙屑砂岩
裂缝识别
三孔隙度指数
时频分析
裂缝有效性
calcareous sandstone
crack identification
three porosity index
time-frequency analysis
the effectiveness of fractures
