利用薄层地震响应预测油气

Hydrocarbon prediction using the thin bed seismic response

西南石油局第二物探大队,德阳618000

The Second Geophysical Prospecting Brigade, Southwest China Petroleum Bureau, GNSPC, Deyang 618000

有一系列的反射特征可用于直接检测烃类, 如振幅、波形、频率、平点和干涉等等, 这些方法已用了许多年, 但因为地下反射过于复杂, 处理中假设条件较多, 解释中的陷阱经常无法排除, 这对中深层的油气勘探尤为如此。因此, 如何准确使用反射特征预测油气显示需要进一步探索。通过对须二地层结构作仔细分析后发现, 薄层地震响应理论可用于油气的直接勘探, 并且多解性明显较少, 结论肯定, 从而成功地建立起须二油气预测模式。

A series of reflection features such as amplitude, waveform, frequency, flat spot,interference and others can be used to directly detect hydrocarbon. These methods have been usedfor many years, but how to use them accurately for hydrocarbon prediction needs further researchfor the subsurface reflections are much complex, the assumption conditions in seismic processingare many, and the pitfalls in interpretation are often unable to be removed, especially forintermediate-or large-depth oil and gas exploration.After an attentive analysis of the Xu-2 strata it is found that the theory of thin bed seismicresponse can be applied to explore hydrocarbon directly and the ambiguity can therefore decrease.Consequently the Xu-2 hydrocarbon prediction pattern is constructed successfully.