石油物探2024，Vol.63Issue(1)：182-194,13.DOI:10.12431/issn.1000-1441.2024.63.01.016
四川盆地五百梯地区长兴组古地貌恢复及地震预测
Paleogeomorphic restoration and seismic prediction of Permian Changxing Formation in Wubaiti,Sichuan Basin
摘要
Abstract
The Permian Changxing Formation in the Wubaiti area of the Sichuan Basin is widely distributed and has a great poten-tial for exploration.However,there are also difficulties,such as the thickness of reef-bank reservoirs,difficult characterization of reef-beach bodies,unobvious evolution rules,and strong heterogeneity,which increase the ambiguity of reservoir prediction.In this study,the seismic anomaly of the reef-bank was described macroscopically and a seismic identification model of the reef-bank res-ervoir in the Changxing Formation was established.The vertical and horizontal development positions of high-quality reef-bank res-ervoirs were excavated,and the controlling effect of paleogeomorphology on the vertical and horizontal development characteristics of the reef-bank reservoirs was analyzed.Finally,the reef-bank reservoir was comprehensively evaluated by combining paleogeo-morphology and reservoir inversion methods,which reduced the multiplicity of the reef-bank reservoir predictions.This study found that the trough prototype was formed before the deposition of the Changxing Formation,and the basic pattern of high land-forms in the platform margin and second row of reefs in the platform were formed in the early and middle stages of the Changxing Formation.By the end of the deposition of the Changxing Formation,the characteristics of the trough were evident and the high part of the paleogeomorphology was the most favorable area for reservoir development.The dominant reservoirs were mainly con-centrated in the outer belt of the platform margin and the local area of the second row of reefs on the platform,providing an impor-tant basis and reference for reef exploration in the Changxing Formation of the Sichuan Basin.关键词
四川盆地/二叠系长兴组/礁滩储层/地震预测/古地貌恢复Key words
Sichuan Basin/Permian Changxing Formation/reef-bank reservoir/seismic prediction/paleogeomorphological restora-tion分类
天文与地球科学引用本文复制引用
赵虎,孙勇,赵容容,罗鑫,安虹伊,陈思锜,徐姁..四川盆地五百梯地区长兴组古地貌恢复及地震预测[J].石油物探,2024,63(1):182-194,13.基金项目
中国石油-西南石油大学创新联合体科技合作项目(2020CX010201)资助.This research is financially supported by the China National Petroleum Corporation-Southwest Petroleum University Innovation Consortium Tech-nology Cooperation Project(Grant No.2020CX010201). （2020CX010201）
