页岩气地震识别与预测技术

依据页岩气的地质特点及当前地震勘查技术的水平,指出地震在识别和追踪页岩储层空间分布（包括埋深、厚度以及构造形态）方面具有明显的优势;综合利用测井及地质资料,对页岩储层有机质丰度、含气性等参数进行解释及优选敏感的地球物理参数,进而建立储层特征与地震响应的关系,以此反演预测页岩气储层有利区;运用相干与曲率等属性分析技术、宽方位甚至全方位地震各向异性分析技术、叠前反演技术、横波分裂技术等,可解决储层裂缝和岩石力学特征问题,直接为钻井和压裂工程技术服务;与压裂技术配套发展的微地震监测技术,可实时提供压裂过程中产生的裂缝位置、方位、大小以及复杂程度,并对储层改造方案的有效性作出准确评价。

Shale Gas Seismic Identification and Prediction Techniques

According to shale gas geological characteristics and present seismic prospecting technical level, pointed out the evident advantages of seismic prospecting on identification and tracing shale reservoir spatial distribution （including buried depth, thickness and structural form）. Integrated utilization of logging data and geological information carry out parameter interpretation of shale reservoir organic matter abundance, gas-bearing property and optimization of sensitive geophysical parameters, and proceed to establish relationship between reservoir characters and seismic responses, on this account to invert prediction of shale gas reservoir favorable areas. Using coherent and curvature attributive analyses, wide even full azimuth seismic anisotropic analyses, prestack inversion, shear wave splitting techniques can resolve reservoir fissure and rock mechanical characteristic issues, directly serve the drilling and fracturing engineering techniques. The adaptation of fracturing technique and microseismic monitoring technique can pl＂ovide fissure location, direction, size and complicity during fracturing process in real time, and accurately evaluate the effectiveness of reservoir modification scheme.