渤海边际小油田生产阶段构造再认识

Structure recognition at production stage of small marginal oilfield in Bohai

D油田位于渤海湾黄河口凹陷中央隆起带,为已生产多年的边际小油田,现已进入生产后期。该油田生产动态储量远大于静态储量,表明对地下的地质认识尚不准确,油田存在挖潜潜力。结合油田生产数据,提出"地震资料+动态资料"新理念,对构造进行再认识。以动态资料为核心,地震资料为基础,探井钻遇的辉绿岩为突破口,对构造进行精细研究,得到新的认识。静态储量与动态储量吻合,历史拟合精度较高,解决了油田动静矛盾的生产问题,为油田的下步调整指明了方向,并为类似边际小油田生产阶段的构造精细研究提供借鉴。

D Oilfield is located in the central uplift of Yellow River Mouth Sag in Bohai Bay. It is a small marginal oil- field that has been produced for several years and now has entered the later production stage. However,the productive re- serves of the oilfield is much larger than the static reserves. So the current underground geological understanding is not ac- curate, and the oilfield exits potential. Based on production data, the structure was recognized by combining seismic data with dynamic data. Taking the dynamic data as the core, the seismic data as the basis, and the drilled diabase of exploration wells as a breakthrough, the further detailed study of the structure was carried out to get a new understanding. With the consistent static and dynamic reserves, and high fitting accuracy of history, the new understanding resolves the production problem of oilfield dynamic and static contradiction, points out the direction for the further adjustment, and provides refer- ences for the fine structure study of the similar marginal small oilfield.