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溱潼凹陷西南斜坡阜三段滩坝沉积特征及模式 预览 被引量:1

The Beach Bar Sedimentary Characteristics and Models of the Third Member of Funing Formation in the Southwest Slope of Qintong Sag
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摘要 通过分析溱潼凹陷西南斜坡滩坝沉积背景、沉积特征、纵横向分布规律,建立了溱潼凹陷西南斜坡三角洲—滩坝沉积模式。西南斜坡发育三角洲侧缘改造型滩坝,受古地貌、湖平面升降、物源控制。湖平面较高时,物源不充足,对三角洲前缘改造弱,形成小规模滩坝,与三角洲主体不连续;随着湖平面降低,物源供应充足,波浪冲刷强,滩坝向内迁徙,形成与三角洲主体连续的滩坝。三角洲与滩坝不连片模式易形成三角洲远砂坝上倾尖灭岩性油藏,三角洲与滩坝连片模式易形成滩坝上倾尖灭砂岩性油藏。根据西南斜坡滩坝沉积特征及模式,最终指出西南斜坡阜三段有利勘探区带。 The delta beach bar models of southwest slope in Qintong sag has been established according to the analy sis of sedimentary background, sedimentary characteristics, plane and vertical distribution. Engineered delta side margin beach bar is developed in the southwest slope, which is controlled by ancient landfotto, lake level, source supplied. When the lake level was high, the source supplied was not enough, and the transformation to the delta ffont was weak, the small scale beach bar was formed, which was discontinuous with the delta body. With dropping of the lake level, the source supplied was sufficient, the wave scour was strong, the beach bar was migrated inward, the beach bar which was continuous with the main body of the delta was formed. Lithologic oil reservoirs of deltaic fat sand bar are easy to form under the model that beach bar is discontinuous with the delta body; Upper dip and top out reservoirs of sandstone in beach bar are easy to form under the model that beach bar is continuous with the delta body. According to the sedimentary characteristics and models of the beach bar in the southwest slope, the paper point out the favorable exploration zone of the third member of Funing formation in the southwest slope.
作者 卞梅 Bian Mei (Research Institute of Petroleum Exploration and Development, East China Company SINOPEC, Nanjing, Jiangsu 210011, China)
出处 《非常规油气》 2018年第3期25-30,共6页
基金 中石化重大科技项目“苏北盆地华东探区油气聚集规律及精细评价关键技术研究”(ZDP17013)资助
关键词 溱潼凹陷 西南斜坡 阜三段 滩坝 沉积特征 模式 Qintong sag the southwest slope the third member of Funing formation beach bar sedimentary char acteristics models
作者简介 卞梅(1989-),女,硕士,工程师,主要从事储层沉积学研究。邮箱:1034696966@qq.com.
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