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南海西部深水区领域广,水深大,地震和钻井资料少,研究基础薄弱,主要探区以合作为主,勘探程度高,而自营区勘探程度较低.虽然琼东南盆地深水区具有巨大的天然气资源,但是由于面积较大、三维地震资料较少和钻井成本较高,整体勘探程度比较低,若要完成速度分析及速度建模工作是十分困难的.由于深水区有其自身的区域背景,速度研究问题与浅水区存在较大的差异,经过近些年深水区速度研究认为主要存在三方面的问题:如何确定深水区待钻井速度误差校正量、斜坡区速度研究及时深转换方法存在问题和如何优选速度建模方法.针对具体问题,经过大量研究采用针对性的思路方法提出相应的解决对策,并将其形成流程应用于钻井生产实际,取得较好的预测效果和较高的精度.
The deep water area in the western South China Sea has a wide area, large water depth, few earthquakes and drilling data, and weak research foundation. The main exploration areas are dominated by cooperation with a high degree of exploration but low exploration level in their own areas. Although the deep-water area of Qiongdongnan Basin has a huge Natural gas resources, it is very difficult to complete the speed analysis and speed modeling because of its large area, less three-dimensional seismic data and higher drilling costs and lower overall exploration level.Because Sham Shui Po has its own regional background , There are big differences between speed research and shallow water areas. After years of research on the speed of deepwater areas, there are mainly three problems: how to determine the correction amount of drilling speed to be drilled in deep water areas, the research on the speed of slope areas and the problems of time-depth conversion And how to optimize the speed modeling method.Aiming at specific problems, after a great deal of research, we put forward some corresponding countermeasures by adopting the method of thinking, and apply the forming process to the actual drilling production to achieve better forecasting effect and higher accuracy.