基于随机介质理论模拟水合物和游离气储层  

Simulation of hydrate and free gas reservoirs based on random medium theory

作　　者：李灿苹 鲍炳煌 常亮 张海荣 陈凤英 王睿 黄淯辉 LI Canping;BAO Binghuang;CHANG Liang;ZHANG Hairong;CHEN Fengying;WANG Rui;HUANG Yuhui(School of Electronics and Information Engineering,Guangdong Ocean University,Zhanjiang 524088,China;Guangdong Provincial Engineering and Technology Research Center of Marine Remote Sensing and Information Technology,Zhanjiang 524088,China;Research Institute of Geophysical Exploration,Jilin Oilfield Company,PetroChina,Songyuan 138000,China)

机构地区：[1]广东海洋大学电子与信息工程学院,湛江524088 [2]广东省海洋遥感与信息技术工程技术中心,湛江524088 [3]中国石油吉林油田分公司地球物理勘探研究院,松原138000

出　　处：《海洋地质与第四纪地质》2025年第1期199-209,共11页Marine Geology & Quaternary Geology

基　　金：广东省基础与应用基础研究基金项目(2023A1515012041)。

摘　　要：为深入研究水合物的成藏特点和赋存特征,基于随机介质理论模拟水合物和游离气储层,为水合物和游离气储层的地震响应特征研究提供地质模型,进而为水合物勘探识别提供理论方法指导。本文根据水合物和游离气在地层中的实际赋存状态和特点,建立水合物和游离气赋存区轮廓模板;然后基于随机介质理论建立两类储层的随机介质模型;最后在赋存区轮廓模板基础上利用所建立的随机介质模型实现了储层中水合物区域和游离气区域速度的数值模拟,分别建立了水合物储层和游离气储层的速度模型。为更接近水合物所处实际地层环境,在水合物储层上和游离气储层下分别设置均匀速度层,并构建起伏地层分界面,从而建立四层介质起伏界面的速度模型。与富含水合物实际地层对比,模型可展现水合物储层中水合物和游离气分布的复杂非均匀性,也可较好地模拟富含水合物地层中大尺度的水合物和游离气赋存区域。To deeply study the reservoir formation and occurrence characteristics of hydrates,establish geological models for studying the seismic response characteristics of hydrates and free gas reservoirs,and further provide a theoretical guidance for hydrate exploration and identification,hydrates and free gas reservoirs were simulated based on random medium theory.First,according to the actual occurrence status and characteristics of hydrates and free gas in the formation,the contour templates of the occurrence area for hydrate and free gas were established.Secondly,two types of reservoir random medium models were established based on the random medium theory.Finally,based on the contour templates of the occurrence area,the established random medium model was used to achieve numerical simulation of velocity of hydrate areas and free gas areas in the reservoir,and the velocity models for hydrate reservoir and free gas reservoir were established.To approach more closely to the actual geological environment where hydrates are located,uniform velocity formations were individually set up above the hydrate reservoir and below the free gas reservoir,and undulating stratigraphic interfaces were constructed,thus establishing a velocity model for four layer medium undulating interfaces.Compared with actual formations rich in hydrate,the model reflected the complex non-uniformity of hydrate and free gas distribution in hydrate reservoirs,and better simulated the large-scale hydrate and free gas storage areas in formations rich in hydrate.

关 键 词：天然气水合物 游离气 储层 随机介质 数值模拟 

分 类 号：P744[天文地球—海洋科学]