苏里格气田苏东区块山西组沉积体系研究

• Published in: Hăiyang dĭzhĭ yu dĭsĭjĭ dĭzhĭ Vol. 32; no. 1; p. 109
• Main Authors: Jingfu, SHAN, YANG, Wenlong
• Format: Journal Article
• Language: Chinese
• Published: Beijing Marine Geology and Quaternary Geology 01.01.2012
• Subjects: Alluvial deposits; Alluvial plains; Breeding grounds; Breeding sites; Climate; Coal; Conglomerates; Current meandering; Deposition; Floodplains; Fluvial deposits; Fluvial sediments; Gas fields; Humid climates; Lakes; Meandering; Oil and gas fields; River meanders; Rivers; Sand; Sandstone; Sedimentary facies; Sedimentary rocks; Seismic analysis; Seismic profiles; Swamps
• ISSN: 0256-1492
• DOI: 10.3724/SP.J.1140.2012.01109

利用岩心、测井、地震、岩石薄片、分析化验等资料,对鄂尔多斯盆地苏里格气田苏东区块山西组山1、山2段沉积微相进行了研究。研究结果表明,苏东气田东北地区山西组山1、山2段发育了洪泛曲流河沉积体系,主要沉积微相有曲流河道、边滩、河漫滩、河道间等微相类型。在沉积环境分析的基础上,进一步研究了区内沉积微相的平面展布特征及其演化规律,认为区内山2沉积期:发育曲流流河道砂体,储层以褐色含砾中粗粒岩屑石英砂岩-细砾岩为主,并且沉积期为近物源区的冲积平原河流相沉积,受潮湿气候及弱水动力沉积环境的影响,大面积发育河漫沼泽沉积,为煤层提供了温床,纵向上形成了3~5套煤层,物源供给相对充沛,形成了一定厚度的曲流河道块状砂体沉积;山西组山1沉积期:受潮湿气候的影响,广泛发育湿地河漫湖泊、河漫滩沉积。