圈闭要素计算方法及应用效果

断块油田的油气聚集和分布,在很大程度上受各种类型的断层所控制。这种油田具有构造面貌复杂、含油层系多、油水关系复杂、含油丰度差别大等特点,给油气勘探和开发造成了许多困难和不便。目前,有关断块构造圈闭的统计尚无统一标准。以往所用的取值方法是沿用背斜圈闭的要素统计方法,不能适用于复杂的断块构造圈闭。本文以断层圈闭特点为基础,以影响圈闭性能的各种因素间的函数关系为依据,提出了具有较厚盖层和储层地区的断层圈闭要素的计算方法。将此法应用于东濮凹陷,取得了较高精度的含油圈闭面积。

A method for trap factor calculation and its effect.

The accumulations and distributions of oil and gas in fault-block oil field are greatly controlled by various faults.Such oil field is characterized by compli- cated structure,multiple reservoirs,complex contact between oil and water,and big oil abundance difference among the reservoirs.The properties bring many troubles to the exploration and development of such oil and gas fields.There is no uniform statistical calculation standard that is special for multitudinous fault block traps.Common trap factor calculation methods are suitable for anticlinal trap,but they are not applicable to complicated fault block traps.A new factor calculation method for fault traps in which there are quite thick reservoir and overlying formation is presented on the basis of fault trap property and interre- lations among the factors which influence trap characteristics.Quite accurate closing areas of oil traps have been obtained by using the method in Dongpu seg.