北马庄油田南部扇三角洲储集体沉积特征

Analyzing the Sand-body Character in the Fan Deltaic Reservoir, South of Beimazhuang Oilfield

黄郑 刘斌

HUANG Zheng LIU Bin

中国地质大学 研究生院, 湖北 武汉 430074; 中国石化 河南油田分公司 勘探开发研究院, 河南 南阳 473132

Graduate College of China University of Geosciences, Wuhan 430074, China; Exploration and Development Reserach Institute, Henan Oilfield Branch of SINOPEC, Nanyang 473100, China

扇三角洲砂体的沉积特征与碎屑供应、古地貌和沉积环境密切相关。为了认识北马庄油田南部扇三角洲储集体沉积特征, 利用现代沉积学、测井学和地震勘探等手段, 对沉积背景、沉积体系、沉积微相及沉积体平面和剖面特征进行详细剖析。识别了一种在沉积物供应缺乏、水体能量弱、断陷区发育的"饥饿型水下扇三角洲沉积体系", 表明北马庄油田南部扇三角洲储集体具有明显的重力流沉积特征, 分流河道不发育, 沉积砂体平面呈"裙边状";砂体延伸较近, 快速收敛, 层薄, 沉积砂体属近源快速堆积型;研究区湖面多期变化, 南北沉积体发育呈多期旋回特征。

Character of fan delta sand body is confined by sediments resource, sedimentary landform, and sedimentary environment, etc.In order to get know ledge about the fan delta sand-body character in the reservoir in south of Beimazhuang oilfield.This paper, using present sedimentology, logging and seismic exploration methods, give a detail analysis of sedimentary environment, distinguished character, plane distribution character and section distribution character. This paper also identifies a special fan delta-the hung rysub marine fan delta, which growing in fault depression when short of sedimentary resource, and weak water energy. The results indicate that the fan delta is of obvious gravity flow sedimentary character, and the distributary channel of which is non-developed and the shape of sedimentary sand body like rim of skirt. The sand body ex tends shorter, fast convergence and thin, belonging to a near resource fast sediment type. Sedimentary sand body grows five terms sediment as the lake surface changes.