含油气水地层的物性参数响应特征

Petrophysical characteristics of formation filled with oil, gas, or water

VSP勘探是地面激发 ,井中接收 ,优点是避免了地面各种干扰的影响 ,尤其是利用多级检波器同时接收的方式获取的VSP资料 ,可以提取较高精度的地层速度参数 ,进而计算得到可信度较高的岩石物性参数 ,如纵横波速度比、泊松比等。分析这些参数的变化特征以及对储层含油、气、水时的响应特征 ,结合测井和录井等资料进行综合研究 ,可以对储层的含油气性进行综合评价 。

VSP survey has an advantage of shooting at earth surface and receiving in borehole that can bypass surface interference waves. With VSP data, especially the data obtained by adoption of multiple level receivers, formation velocity of higher quality can be calculated, which in turn leads to more reliable petrophysical parameters (such as ratio of P-waves and S-waves, Poisson's ratio, etc). With well data, one can infer the presence of hydrocarbons through an analysis of the variability of these parameters in formation. The results will be helpful for future seismic data interpretation and hydrocarbon test.