PP-PS协同反演技术预测大庆深层火山岩含气储层

徐深气田深层火山岩含气储层含气检测尚缺乏有效的方法,传统的纵波反演由于反演过程中仅仅使用单个模型的波,反演结果存在多解性.PP、PS联合反演方法较好地解决了多解性难题,反演结果比较稳定,可信度较高.通过在大庆深层火山岩探区采集2D3C多波资料,并进行处理技术攻关,综合利用测井、VSP等资料,利用PP、PS联合反演技术进行了纵、横波速度比弹性参数反演.结果表明,储层特征与联合反演的Gamma场剖面特征对应较好,测井资料显示的储层特征在反演剖面上也有较好的显示,从而证明了PP、PS协同反演技术在深层火山岩含气储层预测上的有效性.

Joint PP-PS inversion techniques and their application for predicting gas reservoir of deep volcanic in Daqing

There is no effective method to detect the gas from volcanic rock reservoir in Xushen gas field. Because of using single mode wave during inversion in traditional P-wave inversion, the result has multiple solutions. Joint PP and PS inversion could well solve this problem, and the inversion result is stable and highly reliable. The 2D3C multi-phase data were acquired in a deep volcanic rock survey in Daqing, while we carried out tackling the key problems of processing, and at the same time using PP and PS inversion technique we got the elastic parameter of V_p/V_s. It showed good relation between the reservoir characteristic and Gamma section. The reservoir characteristics from well-log data correspond to the inversion section, as a result it proved that joint PP and PS inversion is effective in the reservoir prediction in deep volcanic.