砂体回弹在大庆油田形成过程中的贡献  

Contribution of sandstone rebounding to hydrocarbon accumulation of Daqing Oilfield

作　　者：田丰华[1] 姜振学[1] 夏淑华[1] 

机构地区：[1]中国石油大学盆地与油藏研究中心

出　　处：《中国石油大学学报（自然科学版）》2008年第2期16-20,共5页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(40372071和40472078)

摘　　要：针对含油气盆地目的层之上普遍存在剥蚀卸载的问题,以卸载时下伏饱和介质必然发生回弹为理论基础,探讨了剥蚀卸载过程中的砂体回弹对大庆油田形成的相对贡献。岩心回弹物理模拟实验表明,大庆油田青山口组储层的砂岩回弹应变最大可达1.143%,并与有效上覆压力存在着指数关系,影响应变的主要因素是轴向应力和砂岩的粒度。在大庆油田目的层之上两次重要的剥蚀卸载事件中,砂体回弹所泵吸的油气资源量为(0.8984～2.6952)×108t,占大庆油田总资源量的1.45%～4.35%,因而认为砂体回弹可能是大庆油田成藏的机理之一。According to the theory of saturation media rebounding during unloading, the contribution of sandstone rebounding to the Daqing Oilfield was discussed during the uplift erosion. The results of rebounding physical simulation experiments show that the rebounding strain of sandstone in Qingshankou formation has a considerable value of 1. 143% and an exponential relationship with the overburden effective pressure, and the axial stress and the granularity of sandstone play an important role in sandstone rebounding strain. Based on the result of the experiment, the hydrocarbon resource amount pumped by sandstone rebounding during the two times uplift-erosion unloading of Daqing Oilfield is （0. 898 4 - 2. 695 2 ）×10^8 t totally, which is the 1.45% -4. 35% of total resource of Daqing Oilfield. So the sandstone rebounding could be the mechanism of hydrocarbon accumulation of Daqing Oilfield.

关 键 词：大庆油田 抬升剥蚀 物理模拟 砂体回弹 成藏机理 

分 类 号：TE122.3[石油与天然气工程—油气勘探]