| 作 者：李梅1,2 ,郗诚2,张志让2,詹路锋2,潘以红2,张健3,彭勇3 |
| 单 位：1 成都理工大学沉积地质研究院；2 恒泰艾普石油天然气技术服务股份有限公司；3 中国石油西南油气田分公司 |
| 基金项目：中国石油天然气股份有限公司物探攻关专项（编号2010-02-02）等资助 |
| 摘 要： |
| 目前的地震反演均是基于已钻井的地质信息,对无井或少井地区的地震储层预测仍然比较困难。采用叠前和叠后混合反演的办法,实现虚拟井约束地震反演,能弥补缺少钻井的缺陷。该方法充分利用了叠前反演分辨率高和叠后反演效率高、抗噪能力强的优点,运用遗传算法原理,在优选控制点处进行精细的叠前地震波形反演以构建虚拟井,然后以虚拟井作为约束信息进行叠后反演,能够达到储层预测的目的。对四川盆地龙岗地区无井台缘斜坡带鲕滩储层进行了应用尝试,预测效果较好。虚拟井约束地震反演方法对油气勘探初期少井或无井研究区的储层预测是行之有效的技术方法之一。 |
| 关键词：地震反演；遗传算法；虚拟井；碳酸盐岩储层；储层预测；龙岗地区 |
| Author's Name: Li Mei, Xi Cheng, Zhang Zhirang, Zhan Lufeng, Pan Yihong, Zhang Jian, Peng Yong |
| Institution: Sedimentary Geology Research Institute of ChengduTechnology University |
| Abstract: |
| The seismic inversion in present is all based on the geology information from drilled wells but the seismic prediction of reservoirs is still difficult in those areas where no or less wells drilled. The use of the inversion of mixing pre-stack with post-stack to realize the inversion with virtual wells can solve the problem of less well information. This method takes full advantage of high resolution in pre-stack inversion with high efficiency and high anti-noise ability in post-stack inversion. By principle of genetic algorithm, the way that fine pre-stack full-wave inversion can be done at selected control points to construct virtual wells and then these virtual wells as restricting information are applied in post-stack impedance inversion can realize the reservoir prediction. By this way, the mixing seismic inversion is well practised to the oolitic reservoirs without wells in the slope belt in Longgang area, Sichuan Basin. It is proved that the technology of virtual-well constrained seismic inversion is effective to predict reservoirs in immature areas without drilled wells. |
| Keywords: Seismic inversion; Genetic algorithm; Virtual well; Carbonate reservoir; Reservoir prediction; Longgang area; Sichuan Basin |
| 投稿时间： 2012-03-19 |
