Distribution prediction of the glutenite in Member 3 of Triassic Xujiahe Formation in Yuanba area,northern Sichuan Basin  

作　　者：Yanqing Huang Tian Lin Ai Wang Zeyu Nan 

机构地区：[1]Sinopec Petroleum Exploration and Development Research Institute,Beijing,100083,China

出　　处：《Petroleum Research》2022年第1期123-130,共8页石油研究（英文）

基　　金：This work was supported by the Sinopec Scientific Research Project“Reservoir evaluation and sweet spot prediction of Xujiahe Formation in northeastern Sichuan Basin”(No.:P19012-2).

摘　　要：Although the Triassic Xujiahe Formation in Yuanba area of northern Sichuan has a large amount of resources,the proportion of proved reserves to the amount of resources is low.Production of most of the pilot production wells is high at the initial stage,but it declines rapidly,mainly due to tight rock properties and strong heterogeneity of Xujiahe Formation.Thus,it is important to investigate the distribution of high-quality reservoirs.The Member 3 of Xujiahe Formation develops sandstone interbedded with mudstone,and its lateral thickness of different sandstone groups varies greatly,so it is a challenge to identify appropriate time windows for seismic attribute analysis,thus,so the prediction effect of the glutenite in the Member 3 of Xujiahe Formation.In this study,through analysis of core data and logging facies,single-well sedimentary microfacies subdivision is carried out.Single-well lithological interpretation is also studied with application of lithological identification technique.Then,lithological associations and its seismic responses at the top and bottom interfaces of each sandstone group in the Member 3 of Xujiahe Formation are well investigated,The lithological association with the glutenite above and the mudstone below the stratigraphic interface respectively,corresponds to a trough in seismic profiles;in this case,when extracting the seismic attributes of sandstone groups above the stratigraphic interface,only the difference of between drilling horizons and seismic horizons needs to be considered.The lithological association with the mudstone above and glutenite below the stratigraphic interface respectively,corresponds to a peak in seismic profiles;in this case,when extracting the seismic attributes of sandstone groups above the stratigraphic interface,influence of which should be eliminated;thus,a method of time window determination for seismic attribute extraction is established.Among amplitude,frequency,and phase attributes,the total peak energy has the good correlation with thickness of the glu

关 键 词：Braided river delta Time window Seismic attribute GLUTENITE Xujiahe formation Sichuan basin 

分 类 号：P31[天文地球—固体地球物理学]