塔河油田S75井区卡拉沙依组沉积特征与演化
来源期刊：中南大学学报(自然科学版)2013年第4期
论文作者：崔金栋 郭建华 李群
文章页码：1578 - 1586
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
Key words：sedimentary facies; sequence stratigraphy; sedimentary evolution; Kalashayi Formation; S75 Well Field; Tahe Oilfield
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。
Abstract: 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 flat and fan delta facies. On the basis of classic sequence stratigraphy, Kalashayi Formation was divided into three third order sequences (Csq1, 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 flat—fan delta plain under the influence of tectonic movement and the sea level change.
崔金栋，郭建华，李群
(中南大学 地球科学与信息物理学院，有色金属成矿预测教育部重点实验室，湖南 长沙，410083)
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。
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
CUI Jindong, GUO Jianhua, LI Qun
(Key Laboratory of Metallogenic Prediction of Nonferrous Metals, Ministry of Education,School of Geosciences and Info-Physics, Central South University, Changsha 410083, China)
Abstract: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 flat and fan delta facies. On the basis of classic sequence stratigraphy, Kalashayi Formation was divided into three third order sequences (Csq1, 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 flat—fan delta plain under the influence of tectonic movement and the sea level change.
Key words:sedimentary facies; sequence stratigraphy; sedimentary evolution; Kalashayi Formation; S75 Well Field; Tahe Oilfield
