高邮凹陷花庄地区阜三段断块-岩性油藏成藏特征研究

Study on Fault Block-lithological Oil Reservoirs Forming Characteristics of Fu3 Member in Huazhuang Area,Gaoyou Sag

通过对高邮凹陷花庄地区阜三段油藏特征的研究,指出阜三段地层为三角洲沉积,主要储集砂体类型有水下分流河道、前缘席状砂和远砂坝,分布稳定,具有较高的孔隙度和渗透率;良好的储集砂体、下伏阜二段烃源岩、复杂的断裂体系和断块(鼻)构造、阜三段内泥岩和上覆阜四段大套泥岩盖层等是本区有力的成藏条件;油藏以断层控制为主,储层物性和岩浆活动为辅,油藏类型有三类,即断块(鼻)油气藏,断块遮挡油气藏、断层-岩性油藏。

Delta deposition was developed in the studied area, and main reservoir bodies include the subaque- ous distributary channel sand bodies, distal bar and front matting shaped sand bodies, with a stable distribution and higher porosity and permeability. There are main four favorable conditions of reservoir, they are the good reservoir sands , Fu2 Member source rock, complex fault system and fault blocks and faulted noses, Fu4 member mudstone cap and mudstone in Fu3 member. The reservoir in this area is main controlled by the fault, reservoir physical properties and magmatic activity secondary. So the type of oil reservoir are mainly of fault-nose, fault-block and structure-lithological oil reservoirs