基于Zoeppritz方程的礁-滩相流体检测技术研究

Reef Flat Facies Fluid Detection Technique Research Based on Zoeppritz Equation

我国南方海相碳酸盐岩礁-滩相储层,埋藏深,非均质性强,勘探风险大。需要发展利用叠前地震资料基于Zoeppritz方程的反演技术来进行油气检测,以达到综合评价礁-滩相油气藏的目的。首先介绍了Zoeppritz方程和叠前反演技术流程,其次以四川盆地SYB地区为例,以3个共角度道集为基础,并用2口井进行约束实施了叠前反演,得到了一批反演数据体,经过仔细分析,确定了气藏最有利发育区带,为SYB地区今后勘探指明了方向。

The South China marine carbonate reef flat facies reservoir rocks are featured with deep burial, strong heterogeneity, and high exploration risk. The inversion techniques should be developed and applied to pre-stack seismic data that based on Zoeppritz equation and its simplified form to identify oil and gas reservoirs, so as to evaluate reef flat facies comprehensively. Firstly, Zoeppritz equation and its simplified form are introduced. Then SYB region in Sichuan basin is treated as an example, inversion data body is obtained from pre-stack inversion with two wells bound on the basis of three common angle gather. And after careful analysis, the most favorable gas reservoir development region is determined, which provides an exploration direction in SYB region