台北凹陷神泉油田断块油气藏特征与控油因素

Fault-block Reservoir Characteristics and Oil Control Factor in Shenquan Oilfield of Taibei Sag

台北凹陷神泉油田侏罗系油藏储量占全油田的 70 % ,是神泉油田的主力油藏 ,油藏类型为复杂断块油藏。平面上受北东走向断层和东西走向两组断层夹持形成了“墙角式”的 1 6个含油断块 ,各断块之间无统一油水界面 ;纵向上发育 44个油藏 ,单个油藏规模小 ,以低丰度油藏为主。继承性发育的古构造背景控制了油藏的形成与演化 ,正向构造的周全程度影响了油气的富集程度 ,断层封闭的相对性和易变性导致油气分布贫富差异更趋明显、油水关系更加复杂化 ,对这一典型油藏进行分析 ,明确控油因素 ,将有助于进一步明确该区滚动勘探的方向 ,开拓新的找油领域。

In Taibei Sag,the Jurassic reservoir is major reservoir in Shenquan Oilfield,its reserve accounts for 70% of fieldwide reserve,and the reservoir type is complicated fault block oil pool.Two groups of faults,the north to east trend faults and the east to west trend faults,crossed horizontally to form 16 oil-bearing blocks.There is no constant oil-water contact among the blocks.There are 44 reservoirs which were grown vertically,most of them have the characteristic of low abundance,and the size of single reservoir is small.Inherited palaeostructure controlled formation and development of the reservoirs,and the integrality of positive structure influenced the enrichment of oil and gas.Relativity and changeability of fault closure led to more variable enrichment of oil and gas and more different oil-water contact.In the article,this representative reservoir was analyzed and the oil control factors were made clear.The jobs would help us to understand the direction of next progressive exploration in this region more fully,and help us to find new oil-bearing area.