胜利油田胜海地区馆陶组上段油气藏勘探中的地震方法研究与应用

胜海地区是胜利油田重要的资源增补阵地。该区存在明化镇组、馆陶组、东营组、沙河街组、中生界、古生界、太古界等 7套含油层系 ,其中馆陶组上段是最有利的含油层系之一 ,但勘探难度大 ,主要原因是该层系储集层薄、横向变化大、钻井稀少。通过测井资料的统计分析、建立地质模型以及地震正演模拟 ,对该地区馆上段的地震地质特征、油气藏的地球物理机制和物性特征做了深入的剖析 ,在此基础上提出并研究了适合本区油气藏勘探开发的几种地震方法 ,包括叠后地震多参数分析技术、叠前道集分析技术 (AVO、FVO等 )、叠加速度谱分析应用技术等 ,这些方法在该区几个区块油气藏的预测与描述中取得了理想效果 ,大幅度降低了海上钻井的高投入、勘探开发的高风险。这无疑对胜利油田广大的滩海以及类似地区未来的勘探开发具有重要的指导意义。图 3表 1参 5(王延光摘 )

The study and application of the seismic methods in oil and gas exploration in Upper Guantao Formation of Shenghai area

The Shenghai area is one of the most important regions for oil and gas resource supplement of Shengli oil field. In this area, there are 7 oil-bearing formations including Minghuazhen, Guantao, Dongying, Shahejie, Mesozoic, Paleozoic and Archeozoic, among which Guantao has the most potential. However, it is quite difficult to perform the exploration because of very thin reservoir, large change of reservoir in space, a few drills etc. In this paper, the seismic-geological properties and reservoir characteristics are studied on the basis of well log analysis, geological model and seismic modeling. Some effective seismic methods are put forward , which are the post-stack multi-attribute analysis technique, the pre-stack gather analysis technique directly used for oil and gas prediction and the stack velocity application technique. Drilling proves that the techniques mentioned above are very effective, which reduces the quite high cost of drilling and the risk of exploration and production in the sea. Undoubtedly the extending application of them will play the most important role in oil and gas E & P for vast Shengli shallow sea and the areas similar to Shenghai.