沉积与特提斯地质2024，Vol.44Issue(2)：278-294,17.DOI:10.19826/j.cnki.1009-3850.2023.01003
四川盆地二叠纪礁滩体发育特征、分布模式及有利勘探区带
Development characteristics,distribution patterns and favorable exploration zones of Permian reef shoals in Sichuan Basin
摘要
Abstract
The exploration of carbonate rocks around the Permian Kaijiang-Liangping trough in the Sichuan Basin has achieved great success,but exploration has entered a bottleneck period in the past decade.In order to further deepen the understanding of Permian reef shoals and achieve new breakthroughs in large-scale exploration,based on drilling,logging,seismic,and geological data,a systematic study has been carried out on the Permian tectonic-sedimentary evolution characteristics and the distribution patterns of Permian reef shoals,and the favorable zones for further reef shoals exploration have been identified.Research shows that:(1)The shoal in the Qixia Formation tableland is controlled by the late Caledonian ladder-like annular erosion,featuring a ring-like distribution in the early,middle,and late stages.The Jiulong Mountain-Longgang region in northern Sichuan and the Yibin-Neijiang region in southern Sichuan have good conditions for the inner shoal formation of the ring-like tableland in the late stage of the second member of the Qixia Formation,with a low degree of exploration,needing further exploration in the next step.(2)The second stage of the Maokou Formation is the key period for the transformation of the sedimentary pattern of the Permian system.The sedimentation of the lower sub-member of the Maokou Formation was controlled by the residual landform of the Caledonian paleo-uplift,thus,the inner shoal is distributed in a ring belt.The ancient landform of the area to the upper sub-member of the Maokou Formation was affected by the uplift of the Emei mantle plume,so,the favorable sedimentary facies transformed into a"strip-like"distribution pattern trending northwest-southeast.The platform margin shoal of the upper sub-member of the Maokou Formation in the north slope region of Moxi is a major successor area of the Maokou Formation.(3)The platform margin reef shoals of the Changxing Formation migrated into the Kaijiang-Liangping trough to form multiple rows of reef shoals,which have superior source and reservoir distribution conditions,being a potential exploration area of the Permian system.关键词
四川盆地/二叠系/礁滩体/发育特征/分布模式/有利勘探区带Key words
Sichuan Basin/Permian system/reef shoal/devel opment characteristics/distribution pattern/favorable exploration area分类
天文与地球科学引用本文复制引用
冯许魁,徐宝亮,郭海洋,杨雨,朱亚东,崔永平,陈辉,巫芙蓉,臧殿光,倪华玲,吴育林..四川盆地二叠纪礁滩体发育特征、分布模式及有利勘探区带[J].沉积与特提斯地质,2024,44(2):278-294,17.基金项目
国家自然科学基金项目"石油开发中多相流体相互作用的建模、数学理论与数值模拟"(11931013) （11931013）
