荆丘构造的地震地质解释

荆丘构造在地震工作和钻井见油之后,又把地震测网加密到1(公里)×1(公里),对地震资料做了比较细致的处理,并仔细地研究了地震波的振幅、频率及速度信息和地质信息的关系。研究表明,指示油气存在的是“暗点”、“低频”、“低速”等特征。这种关系经过了模型正演的验证。提供了三口评价井,口口见油,使得原解释的荆丘构造的含油面积由1平方公里扩大到6平方公里。

Seismic interpretation of Jingqiu anticline

After a seismic reconnaissance done and oil discovered on Jingqiu anticline, a denser line grid of lkmx 1km was shot in this area。Then a refined data processing was done, and the relations between the amplitude, frequency, velocity and formation are analysed in detail. We find that the existence of hydrocarbon is indicated by "dim spots", low frequency and low velocity, The reliability of the prediction was confirmed by forward model technique. The three assessment wells positioned by seismic interpretation all produce oil, the oil-bearing area of this anticline being expanded from 1 square km to 6 square km.