【作者】 宋荣彩；

【导师】 张哨楠；

【作者基本信息】 成都理工大学 ， 矿产普查与勘探， 2006， 博士

【摘要】 廊固凹陷是冀中坳陷内构造最为复杂的伸展断陷湖盆，经过四十多年的油气勘探，已在古近系发现了众多的以构造为主控因素的油气藏，随着勘探的深入，形态好、面积大、埋藏浅、成藏条件优越的构造圈闭多已钻探，致使勘探难度愈来愈大。但是针对廊固凹陷资源转化率低、剩余资源量仍相当丰富这一物质基础，认为廊固凹陷仍有较大的勘探潜力，且可能就富集在勘探程度相对较低的隐蔽圈闭中。由此认为隐蔽油气藏将是廊固凹陷今后储量继续稳产、增产的勘探目标。 论文在广泛参阅了前人大量的研究成果，并充分吸收了华北油田分公司历年来主要的勘探成果的基础上，以大量的岩芯、钻井／测井和地震资料为依据，以凹陷的沉积背景、构造背景研究为前提，应用地质综合分析法和地球物理解释技术，在层序地层学、沉积学、构造地质学及地震地层学等基本理论的指导下，首次建立了全盆地古近系层序地层格架，将古近系划分为一个一级层序、三个二级层序、十一个三级层序。研究认为，一个完整的、理想的层序可划分为湖泊充填体系域、湖泊扩张体系域、湖泊稳定体系域、湖泊收缩体系域(下降体系域)。在廊固凹陷共划分了三个层序组，第一个层序组以发育湖泊充填体系域、湖泊扩张体系域为特征；第二个层序组以发育湖泊扩张体系域、湖泊稳定体系域和下降体系域为特征；第三个层序组以发育湖泊充填体系域、湖泊扩张体系域和湖泊收缩体系域为特征。 非补偿沉积盆地层序地层学中，构造的控制作用往往是一个表象，古物源、古气候等沉积背景因素应放到更加重要的位置。在参照基底地层分布特点、基底地层岩石组合特征及古水系发育状况的基础上，将廊固凹陷划分为四大主物源区八大亚物源区。同时在分析不同构造单元岩石组合、岩性组合的基础上将凹陷划分为十个相对速度稳定的区块。该划分为沉积体系的平面展布提供了较为直观的依据。大兴断层对廊固凹陷沉积的控制作用表现在以更多还原

【Abstract】 The Tectonic in Langgu depression is the most complex extensional raft lake basin, Jizhong. The oil and gas has been explored for 40years. A large number oil-gas pools controlled by structure factor has been found in the depression. As these achievements of exploration being, the structural trap of good shape, big area, shallow embedding, predominant being pool condition has been drilled. It is more and more difficult to find them and the explorational situation is facing a hard test. On the other hand, the resources hydrocarbon-generating ratio and is rather low and the residual hydrocarbon resources of Langgu depression is still large. So it can be thought to have more explorational potential, most of oil and gas are likely to be accumulated subtle traps with lower explorational degree. Thereby, the subtle oil-gas pools will become explorational target for keeping on dependable crop and increase production of resources in Langgu depression.On the basis of reading many research findings of the predecessors and sufficiency absorbing exploration achievements obtained in the past years of huabei oil company, and using the large number of cores, well logging, seismic data and other basic data, with the research of depositional and tectonic background, depending on basic theories of sequence stratigraphy, sedimentology, tectonics, seismostratigraphy, the sequence stratigraphy and depositional systems of Paleogene of Langgu depression are established in the first time. The sequence of Paleogene is one 1 st order sequence, three 2st order sequence, eleven 3st order sequence. A whole and perfect sequence may be divided four system tract, including lake filling system tract, lake expanding更多还原