岩性油气藏 ›› 2023, Vol. 35 ›› Issue (1): 120131.doi: 10.12108/yxyqc.20230111
• 地质勘探 • 上一篇
何春丰1, 张翔1,2, 田景春1,2, 夏永涛3, 杨燕茹1, 陈杰1, 王鑫宇1
HE Chunfeng1, ZHANG Xiang1,2, TIAN Jingchun1,2, XIA Yongtao3, YANG Yanru1, CHEN Jie1, WANG Xinyu1
摘要: 塔北新和地区下白垩统舒善河组是塔里木盆地北部岩性油气藏勘探的潜在领域之一。通过23口钻井资料和全覆盖三维地震资料解释成果,开展了塔北新和地区下白垩统舒善河组的地层划分,详细研究了舒善河组沉积微相特征及平面分布,并建立了薄砂体的沉积模式。研究结果表明:①塔北新和地区舒善河组与上覆巴西改组呈整合接触,超覆于沙雅隆起剥蚀基底之上,可划分为舒1段、舒2段和舒3段。②研究区舒善河组岩石类型主要为岩屑长石砂岩,其次为长石岩屑砂岩、长石砂岩,可识别出滨浅湖泥和滨浅湖砂坝微相。③研究区舒善河组沉积前发育“隆起、低隆起和洼地”三级古地貌,控制了沉积相的展布。舒1段沉积期沉积范围局限于洼地区,舒2段沉积期地层由洼地区向东西两侧超覆,沉积面积扩大,舒1段-舒2段沉积期由东、西两侧向中部呈滨湖-浅湖的相带展布特征;舒3段沉积期,研究区进一步湖侵为浅湖沉积。④研究区舒善河组薄砂体是重要的勘探领域,其分布受控于沉积前古地貌、湖平面变化和古水深。
中图分类号:
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