四川盆地威远地区构造演化特征及其对下古生界油气富集的控制作用  

CHARACTERISTICS OF TECTONIC EVOLUTION OF WEIYUAN AREA IN SICHUAN BASIN AND ITS EFFECT ON LOWER PALEOZOIC OIL AND GAS RESERVOIRS

作　　者：喻颐[1] 李忠权[1,2] 杨渊宇[1] 应文峰[1] 杭文艳[1] 

机构地区：[1]油气藏地质及开发工程国家重点实验室.成都理工大学 [2]构造与成矿成藏重点实验室.成都理工大学

出　　处：《天然气勘探与开发》2013年第2期1-4,16,共5页Natural Gas Exploration and Development

基　　金：国家自然科学基金重点项目(41030426);教育部博士点基金(20095122110002);四川省构造地质重点学科(SZD0408):四川盆地构造动力学;盆地叠合特征及油气富集规律研究

摘　　要：基于威远地区地震资料构造解释成果、钻井资料和地质背景,通过对05wy11和05wy30地震测线剖面演化史恢复和分析,认为威远背斜发育过程中至少经历了早起拉张和晚期挤压两种不同构造动力学背景的构造运动,其证据为现今保留的高角度正断层、低角度逆断层和上逆下正反转断层。威远背斜的形成可分为早古生代的雏形期、二叠纪—中三叠世稳定期、晚三叠世—始新世的调整期和渐新世—现今的定型期。最后结合生烃史及构造—演化史分析了构造演化对下古生界油气藏的控制作用。For the profile of two seismic lines in Weiyuan area,including 05wy11 and 05wy30,the evolution history is analyzed based on the seismic-data structural interpretation,drilling data and geological setting.Results show that(1) the development of Weiyuan Anticline experienced two tectonic movements with different dynamical background,containing early extension and later compression.And the existing high-angle normal fault,low-angle reverse fault,and upper-reverse lower-normal reverse fault may be taken as evidences;(2) there are four stages to form this anticline,including embryonic stage of early Paleozoic,stable stage from Permian to middle Triassic,adjustment stage from late Triassic to Eocene,and completing stage from Oligocene to nowadays.Finally,the effect of structural evolution on lower Paleozoic oil and gas reservoirs is analyzed by means of both hydrocarbon-generating history and structural evolution history.

关 键 词：威远背斜 地震解释 构造演化 高角度断层 反转断层 

分 类 号：P618.13[天文地球—矿床学]