塔里木盆地满西地区石炭系层序地层与沉积体系分析

根据层序地层学的基本原理,综合利用露头、钻井、测井和地震资料,以层序体系域边界特征为划分依据,将塔里木盆地满西地区石炭系划分为6个沉积层序,并确定了低位、海进、高位体系域的发育情况。研究区石炭系沉积于陆棚区,主要发育河流、滨岸、浅海陆棚、浅水碳酸盐岩、扇三角洲、海岸平原、泻湖、碳酸盐岩与碎屑岩混合等8种沉积体系。低位体系域以发育河流沉积体系为特征,海侵体系域发育有浅海陆棚、浅水碳酸盐岩、海岸平原、碳酸盐岩与碎屑岩混合沉积体系,除河流沉积体系外,其它7种沉积体系在高位体系域中均有发育,研究区主要储集砂体分布于高位体系域的滨岸沉积体系中。 

ANALYSIS ON SEQUENCE STRATIGRAPHY AND DEPOSITIONAL SYSTEMS OF THE CARBONIFEROUS IN WEST MANJIAER REGION

Based on the comprehensive using of outcrop, borehole, logging and seismic data and the boundary characteristics of depositional system tracts, the Carboniferous of West Majiaer area, Tarim Basin were divided into six sedimentary sequences. And development of the lowstand, trangressive and highstand system tracts was ascertained. The study area was located on the continental shelf during Carboniferous. The major depositional systems were composed of 1) river system; 2) littoral system; 3) shallow marine shelf system; 4) shallow carbonate system; 5) fan-deltaic system; 6) coastal plain system; 7) lagoon system; and 8) mixed clastic-carbonate system. Lowstand system tracts were characterized by river system; and shallow marine shelf, shallow carbonate platform, coastal plain and mixed clastic-carbonate systems were developed in trangressive system tracts. Except for river system, all other systems were developed in highstand system tracts. The reservoirs were mainly developed in the littoral system of highstand system tracts.