同沉积断裂带砂砾岩隐蔽油藏研究——以东营凹陷胜北断裂带为例

STUDY OF SUBTLE GLUTENITE RESERVOIRS IN SYN-DEPOSITIONAL FAULT ZONES-A CASE STUDY OF THE SHENGBEI FAULT ZONE IN THE DONGYING DEPRESSION

宗国洪 冯有良 刘承华 李传华 郝雪峰 郭玉新 王伟庆

ZONG Guohong FENG Youliang LIU Chenghua LI Chuanhua HAO Xuefeng GUO Yuxin WANG Weiqing

中国石化, 胜利油田有限公司, 勘探项目部, 山东, 东营, 257001 2. 中国石化, 胜利油田有限公司, 地质科学研究院, 山东, 东营, 257015 3. 中国石化, 胜利油田有限公司, 胜利采油厂, 山东, 东营, 257051

Exploration Dept. of Shengli Oilfield Corporation Ltd. SINOPEC, Dongying, Shandong 257001, China 2. Geological ScientificResearch Institute of Shengli Oilfield Corporation Ltd. SINOPEC, Dongying, Shandong 257015, China 3. Shengli Production Crew of Shengli Oilfield Corporation Ltd., SINOPEC, Dongying, Shandong 257051, China

以构造层序、层序地层分析和基准面分析原理为手段,利用高分辨率地震剖面、测井、岩相等资料,重点研究了东营凹陷胜北断裂带深断陷型湖盆层序中的低位体系域砂体沉积特征、发育规律及其石油地质意义.研究表明,沙三期胜北断裂带的活动形成了断裂坡折带,该坡折带控制沙三段层序低位体系域冲积扇、扇三角洲、浊积扇和小型三角洲等砂体的发育及时空展布.断裂坡折带控制的低位体系域砂体位于层序底部、最大湖泛面之下,成藏条件优良,是隐蔽油气藏勘探的主要方向.

Based on the principles of tectonic sequence analysis and base-level analysis,high-resolution seismic sections,log curves and lithofacies data,the depositional characteristics of the lowstand sand bodies of Shengbei fault zone in the Dongying Depression and their development and the significance in petroleum geology were studied in detail.It showed that the lowstand sand bodies of the Shengbei fault zone consisted of alluvial fan,fan delta,turbidite fan and mini-delta.The development of sand bodies was controlled by syn-depositional fault and the lower part of the sequences near the fault break zone was favourable for occurrence of subtle reservoirs.

国家自然科学基金项目(49872045).

https://doi.org/10.11781/sysydz200303274