论文部分内容阅读
杨道庆 ,邱荣华 ,赵追 ,姜在兴 .泌阳凹陷北坡下切谷—低位扇沉积体系及其油气勘探意义 .石油地球物理勘探 ,2 0 0 2 ,37(5 ) :4 85～ 4 90 通过层序地层学研究 ,在泌阳凹陷北部斜坡带孙岗地区下第三系核桃园组中识别出 4个三级层序 ,其中在层序 、层序 低位域中识别出下切谷—低位扇沉积体系。下切谷充填物在地震反射结构、沉积结构、沉积序列等方面都具有显著的特征 ,文中总结出该区缓坡扇三角洲平原—下切谷—低位扇沉积体系的沉积模式。断陷陆相湖盆边缘地带发育的下切谷在成因上有自身的特点 ,其形成受到构造沉降和湖平面下降的共同影响。研究下切谷、低位扇对隐蔽油气藏勘探具有非常重要的实际意义 ,文中还指出与该层序模式相关的 4种油气藏。
YANG Dao-Qing, QIU Rong-Hua, ZHAO Chai, JIANG Zai-Xing.The Lower Triassic-Lower Fan Sedimentary System in the Northern Slope of Biyang Depression and Its Implications for Oil and Gas Exploration.Petroleum Geophysical Prospecting, 2002, 37 (5): 4 85-490 In the study of sequence stratigraphy, four third-order sequences were identified in the Lower Tertiary Hetaoyuan Formation in the northern slope region of Biyang Depression, in which the lower cutting valleys and lower fan depositions were identified system. The undercut valleys have significant features in seismic reflection structure, sedimentary structure and sedimentary sequence. The sedimentary model of the gentle-deltaic-lower cutting-low fan depositional system is summarized. The undercut valleys developed in the marginal zone of the continental rift basin have their own characteristics in genesis, and their formation is jointly affected by structural subsidence and lake level descent. Under the study, cutting valleys and lower fans have very important practical significance for the exploration of subtle reservoirs. Four types of reservoirs related to this sequence model are also pointed out.