震源空间成像技术在玛湖地区低信噪比微地震处理中的应用  

Application of source space imaging technology in low signal-to-noise ratio microseismic processing in Mahu area,Junggar Basin,China

作　　者：伍顺伟[1] 董岩[1] 李志宏 朱越 朱键[1] 王英伟[1] 邓玉森 WU Shunwei;DONG Yan;LI Zhihong;ZHU Yue;ZHU Jian;WANG Yingwei;DENG Yusen(Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Karamay 834000,China;Beijing Yuantingtaike Science&Technology Ltd.,Beijing 100102,China)

机构地区：[1]中国石油新疆油田公司勘探开发研究院,新疆克拉玛依834000 [2]北京源烃泰克科技有限公司,北京100102

出　　处：《成都理工大学学报（自然科学版）》2023年第2期249-256,共8页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(kt2018-13-02)。

摘　　要：探讨准噶尔盆地玛湖地区不同信噪比微地震信号处理技术的适应性,为压裂改造提供技术支撑。从玛湖地区微地震信号识别的影响因素分析入手,找出微地震信号成像的技术瓶颈,针对玛湖地区低信噪比微地震信号,提出了采用震源空间成像微地震处理技术。结果表明波形振幅偏移叠加的震源空间成像技术得到的微地震事件结果与实钻井产液剖面具有较高的吻合度,微地震事件计算出的压裂改造体积与钻井的生产情况契合度高,微地震事件密度和水力裂缝长度与弹性模量呈正相关。处理结果不仅实现了研究区低信噪比信号的准确定位,而且实现了对压裂改造效果的有效评估。The adaptability of microseismic signal processing technology with different signal-to-noise ratio in Mahu area of Junggar Basin is discussed in order to provide technical support for fracturing reconstruction.Influencing factor analysis of microseismic signal identification in Mahu area revealed the technical bottleneck of microseismic signal imaging,and hence,proposed the microseismic processing technology of focal spatial imaging.The results show that the microseismic event results obtained by the seismic source spatial imaging technology with waveform amplitude migration and superposition have a high coincidence with the real drilling fluid production profile,the fracture reconstruction volume calculated by microseismic events has a high coincidence with the drilling production situation,and the microseismic event density and hydraulic fracture length are positively correlated with the modulus of elasticity.The processing results of focal spatial imaging microseismic processing technology not only realize the accurate location of low signal-to-noise ratio signals in the study area,but also realize the effective evaluation of fracturing effect.

关 键 词：微地震处理 走时拾取 震源空间成像 波形振幅偏移叠加 

分 类 号：P631.4[天文地球—地质矿产勘探]