富油凹陷二次勘探整体三维地震数据平台构建

Construction of merged 3D seismic data platform for re-exploration of oil-rich sags

冀中坳陷饶阳凹陷等富油凹陷剩余资源依然丰富,但勘探程度已经很高,规模储量发现难度越来越大,构建全凹陷整体连片高品质二次三维地震数据平台,是富油凹陷二次勘探整体构造研究、整体沉积体系研究和地震储层预测、精细目标落实进而实现二次勘探突破的必然要求。文章提出了富油凹陷二次三维地震勘探的"采集优化、城区突破、连片处理、目标融合"工作思路,并构建了冀中坳陷上万平方千米的整体地震数据平台,为冀中坳陷富油凹陷二次勘探持续突破、规模增储发挥了关键作用。富油凹陷整体连片二次三维地震勘探的思路和技术对类似地区的勘探研究也具有借鉴意义。

Although the remaining resources are still abundant in oil-rich sags such as the Raoyang sag in the Jizhong depression, it is increasingly difficult to discover more sizable reserves in these highly explored sags. To carry out re-exploration and make significant breakthroughs, it is necessary to construct a high-quality 3D seismic data platform over the entire sag. Such a platform would be helpful to investigations of overall structural framework and depositional systems, seismic reservoir prediction and fine delineation of exploration prospects. This paper proposes a new idea of re-exploration that includes optimization of seismic survey plan and acquisition parameters, obstacle avoidance over urban areas, merged processing and target fusion, and then constructs the seismic data platform for the whole Jizhong depression covering an area of 10000 km^2, which would play a key role for making breakthrough and discovery of more sizable reserves during re-exploration of the oil-rich sags. The proposed idea and practice can also provide references for oil and gas exploration in other similar regions.