焉耆盆地本布图构造认识过程—一个速度陷阱的典型实例

The evolution of understandings about structure Benbutu in Yanqi basin: A case study of velocity pitfalls

河南石油勘探局研究院,南阳473132

Academy of Henan Petroluem Administration, Nanyang 473132

焉耆盆地本布图构造由于速度陷阱的影响,其构造的预探—详探—开发评价以及开发方案实施均发生了较大变化,即从起初的一个完整断背斜到最终的断背斜和断鼻块,并且构造细节的显示也发生了变化,从而为开发方案的实施带来了较大的困难。通过使用三维叠前深度偏移资料,结合地层倾角测井资料较好地解决了这一问题,构造图精度经钻井检验,其绝对误差最大为7m,相对误差最大为 0 .2 9%,从而满足了开发方案的要求。

The understandings about Structure Benbutu in Yanqi basin has changed drastically at different stages from renaissance to detailed survey and development evaluation and to implementation of development scenario due to velocity pitfalls. That is from a complete faulted anticline originally to faulted anticline and faulted nose blocks finally and at the same time the details of the structure have also changed substantially. This makes the development scenario difficult to carry out. This problem can be solved effectively by combining 3D pre stack depth migration data with diplogs. Drilling tests show that the maximum absolute error is 7m and maximum relative error is 0.29% for the precision of structure map. It therefore meets the demand of development scenario and can speed up the development of this area.