摘要
根据岩芯、测井和地震等资料,在塔河油田S75井区识别出陆架型扇三角洲、潮坪以及碳酸盐岩台地3种沉积相。其中石炭系底部的巴楚组双峰灰岩为碳酸盐岩台地,卡拉沙依组上泥岩段为潮坪相,砂泥岩段底部为陆架型扇三角洲沉积,砂泥岩段上部为潮坪和扇三角洲相沉积。应用经典层序地层学将卡拉沙依组划分为3个三级层序(Csq1,Csq2和Csq3),每个层序又识别出了高位体系域、海侵体系域和低位体系域。进行7口单井的层序划分,依据准层序划分结果将卡拉沙依组划分为17个小层。以等时层序地层格架为基础进行沉积演化研究,从巴楚组的碳酸盐岩台地相开始,受构造运动和海平面升降的影响,卡拉沙依组沉积经历了潮坪—陆架型扇三角洲前缘—潮坪—扇三角洲平原的沉积演化过程。
According to core, logging and seismic data, shelf-type fan delta, tidal flat and carbonate platform facies were identified in S75 Well Field of the Tahe Oilfield. Bachu Formation which peaks at the bottom of the Carboniferous bimodal limestone was carbonate platform, the upper clay-stone section of Kalashayi Formation was tidal flat facies, the bottom of the sand shale section was shelf-type fan delta deposition, and the upper of sand shale section was tidal fiat and fan delta facies. On the basis of classic sequence stratigraphy, Kalashayi Formation was divided into three third order sequences （Csql, Csq2, Csq3）, and each sequence has identified highstand systems tract （HST）, transgressive systems tract （TST） and lowstand systems tract （LST）. The sequence of seven single wells was identified. On the basis of parasequence results, Kalashayi Formation was divided into 17 sublayers. The evolution of sedimentary was studied on the basis of isochronous sequence stratigraphic ＇framework. From the beginning of the carbonate platform of Bachu Formation, Kalashayi Formation experienced sedimentary evolution of tidal flat^-shelf-type fan delta front--tidal fiat-- fan delta plain under the influence of tectonic movement and the sea level change.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期1578-1586,共9页
Journal of Central South University:Science and Technology
基金
国家科技重大专项项目(2011ZX05002-005)
关键词
沉积相
层序地层
沉积演化
卡拉沙依组
S75井区
塔河油田
sedimentary facies
sequence stratigraphy
sedimentary evolution
Kalashayi Formation
$75 Well Field
Tahe Oilfield
