CAJ | 학술논문

本文以野外露头观察及录井、测井、地震、古生物等资料为基础，通过岩石地层、测井地层及生物地层等的综合分析，在四川盆地东北部中二叠统地层中识别出4种类型的层序界面：隆升侵蚀不整合面、暴露层序不整合面、海侵上超不整合面及岩性岩相转换面。划分了3个三级层序：SQ1对应梁山组和栖霞组，时限约7Ma；SQ2对应茅口组一段，时限约3Ma；SQ3对应茅口组二段-三段，时限约5Ma。三级层序的平均时限约5Ma。同时，分析了层序对储层的控制作用，其主要体现在两个方面：层序控制了沉积相，影响了储层原生孔隙的发育；碳酸盐岩的发育受三级层序海平面升降控制，优质储层明显受控于海退半旋回。
본문이야외로두관찰급록정、측정、지진、고생물등자료위기출，통과암석지층、측정지층급생물지층등적종합분석，재사천분지동북부중이첩통지층중식별출4충류형적층서계면：륭승침식불정합면、폭로층서불정합면、해침상초불정합면급암성암상전환면。화분료3개삼급층서：SQ1대응량산조화서하조，시한약7Ma；SQ2대응모구조일단，시한약3Ma；SQ3대응모구조이단-삼단，시한약5Ma。삼급층서적평균시한약5Ma。동시，분석료층서대저층적공제작용，기주요체현재량개방면：층서공제료침적상，영향료저층원생공극적발육；탄산염암적발육수삼급층서해평면승강공제，우질저층명현수공우해퇴반선회。
Four sequence boundaries in the Middle Permian strata in northeastern Sichuan Basin are identified:uplift erosion unconformity, subaerial sequence unconformity, transgressive ( coastal ) onlap unconformity and lithologic-lithofacies unconformity on the basis of outcrops, well logs, seismic and palaeontological data. Three third-order sequences encompass SQ1 corresponding to the Liangshan and Qixia Formations with a time duration of ca. 7 Ma;SQ2 corresponding to the first member of the Maokou Formation with a time duration of ca. 3 Ma, and SQ3 corresponding to the second and third members of the Maokou Formation with a time duration of ca. 5 Ma. The controlling factors include: ( 1 ) the controls of the sequences on sedimentary facies, which exert an important influence on the development of primary porosity in the reservoirs, and ( 2 ) the controls of carbonate rocks development by the eustatic fluctuations in the third-order sequences. The excellent reservoirs are apparently constrained by the transgressive semi-cycles.