CAJ | 학술논문

自王一刚发现开江-梁平陆棚后，作者对其东南延伸部位进行了追踪。通过地表露头剖面及钻井、地震资料等研究后认为，长兴期开江-梁平陆棚自宣汉达县、梁平及开江地区向东南延伸至建南地区，称之为建南陆棚，该陆棚可能与东部的鄂西陆棚相连。建南陆棚与开江-梁平陆棚既有相似性也有重大差别。相似性表现在两方面，一是沉积物岩性相似，都为泥晶灰岩；二是陆棚边缘都发育生物礁，生物礁顶部发育生屑滩白云岩储层。差别主要体现在四个方面：一是水体深度，建南陆棚水浅，开江-梁平陆棚水深，深水与浅水的交汇处在涪陵地区中石化二维地震剖面线TB16与TB17之间；二是斜坡坡度，开江-梁平陆棚边缘斜坡坡度陡，建南陆棚斜坡坡度缓；三是生物礁规模，开江-梁平陆棚边缘生物礁、白云岩储层厚度大，建南陆棚边缘生物礁、白云岩储层厚度小；四是陆棚发育时间，建南陆棚仅发育于长兴早中期，晚期因填平补齐而消失，开江-梁平陆棚发育于整个长兴期。建南陆棚与周边构成碳酸盐缓坡沉积模式，生物礁规模较小，生物礁是优质储发育的主要地区。
자왕일강발현개강-량평륙붕후，작자대기동남연신부위진행료추종。통과지표로두부면급찬정、지진자료등연구후인위，장흥기개강-량평륙붕자선한체현、량평급개강지구향동남연신지건남지구，칭지위건남륙붕，해륙붕가능여동부적악서륙붕상련。건남륙붕여개강-량평륙붕기유상사성야유중대차별。상사성표현재량방면，일시침적물암성상사，도위니정회암；이시륙붕변연도발육생물초，생물초정부발육생설탄백운암저층。차별주요체현재사개방면：일시수체심도，건남륙붕수천，개강-량평륙붕수심，심수여천수적교회처재부릉지구중석화이유지진부면선TB16여TB17지간；이시사파파도，개강-량평륙붕변연사파파도두，건남륙붕사파파도완；삼시생물초규모，개강-량평륙붕변연생물초、백운암저층후도대，건남륙붕변연생물초、백운암저층후도소；사시륙붕발육시간，건남륙붕부발육우장흥조중기，만기인전평보제이소실，개강-량평륙붕발육우정개장흥기。건남륙붕여주변구성탄산염완파침적모식，생물초규모교소，생물초시우질저발육적주요지구。
On the basis of outcrops, cores and seismic data in this study and the previous data, the author in this study proposes a new shelf, i. e. , the Jiannan shelf that represents the southeastward extended part of the Kaijiang-Liangping shelf penetrated from the Xuanhan-Daxian-Liangping- Kaijiang zone southeastwards to the Jiannan area during the Changxingian, and may be connected with West Hubei shelf in the east. Compared with the Kaijiang-Liangping shelf, the Jiannan shelf has the following features. (1) The Jiannan shelf is a shallow-water shelf. (2) The Jiannan shelf was initiated during the early-middle Changxingian and terminated due to the filling up during the late stages of the Changxingian. (3) The Jiannan shelf and its adjacent areas exhibit a carbonate ramp model in which the Changxingian bioherms occur as excellent dolostone reservoirs with good physical properties.