松辽盆地扶杨油层成藏动力探讨  

Discussion on dynamics of Fuyang reservoir in Songliao Basin

作　　者：潘树新[1] 王天琦[1] 田光荣[1] 王建功[1] 郭维华[1] 马凤良[1] 赵伟[1] 

机构地区：[1]中国石油勘探开发研究院西北分院

出　　处：《岩性油气藏》2009年第2期126-132,共7页Lithologic Reservoirs

摘　　要：系统研究了松辽盆地扶杨油层的成藏动力。扶杨油层具有幕式成藏的特点,油气初次运移的动力并非青一段异常高压,而是断裂的幕式活动及地震泵作用。油柱高度与超压并不具有相关性,扶杨油层幕式成藏几乎总是与区域性的构造运动和断裂活动相伴随。毛管压力和浮力作用对油气二次运移产生了巨大的影响,扶杨油层具有常规油气藏和深盆油气藏共存的特点。浮力和区域构造演化的有机匹配,使向环凹陷周边斜坡、鼻状构造、背斜等部位的油柱高度明显增加,且储量丰度明显升高;长春岭低超压区也可以成藏,这些均为浮力及油气侧向运移的结果。三肇、齐家—古龙、长岭等凹陷的轴部是深盆油气藏勘探的重点,古隆起及其斜坡部位和物性较好而超压较低的东北、东南隆起带是下一步的勘探方向。尤其重要的是,杨大城子油层的勘探主要应放在环凹陷周边斜坡、鼻状构造、背斜等部位,而非超压最大的凹陷轴部。Dynamics of Fuyang reservoir accumulation in Songliao Basin are studied. Fuyang reservoir has character of episodic accumulation. Overpressure is not the main force of primary migration but seismic pumping. The oil column height is not associated with the size of overpressure. The episodic reservoir is mainly controlled by regional tectonic movement and faulting. Capillary pressure and buoyancy play an important role in oil secondary migration. Fuyang reservoir has the coexistence of conventional oil reservoirs and deep-basin reservoirs. The organic matching of buoyancy and regional tectonic evolution makes the oil column height obviously increased and makes the reserve abundance improved along the slopes around central depression, nose-shaped structure and anticline. I^w overpressure zones in Changchunling can also form reservoir, which is resulted from buoyancy and petroleum lateral migration. Sanzhao, Qijia-Gulong and Changling sags are the focus of deep-basin reservoir exploration. The uplift and slope, northeast and southeast uplift zones with good properties and low overpressure are the further exploration direction s of Fuyang reservoir. It is particularly important that the exploration of Yangdachengzi reservoir should be primarily laid on the slopes surrounding the sag, nose-shaped structure and anticline, instead of large overpressure zone in the central sag.

关 键 词：超压 幕式成藏 地震泵 二次运移 扶杨油层 松辽盆地 

分 类 号：TE122.3[石油与天然气工程—油气勘探]