摘要
为预测贵州省大河边向斜大河区块煤层气资源富集区,探索三维地震在贵州省煤层气勘查开发中的有效性,依托该区块4 km^(2)三维地震工区勘探资料数据体,利用煤层气领域地震(勘探)资料处理的新技术、新方法开展预测。首先,采用煤层气递进式储层预测思路,利用CGG公司的Jason地学研究平台,开展地震反演预测,获得了煤层厚度、煤层含气量、煤体结构及地应力4个煤层气评价参数的平面分布图。然后,基于研究提出“多因子赋权逐级评价法”,对煤层厚度、含气量、煤体结构等每个评价参数单独形成赋权后,再采用累加的方法,形成了多参数联合的甜点评价权重因子参数。最后,依据计算的综合甜点评价参数(甜点评价参数取值在20~50之间),评分在40~50之间的划分为一类甜点,评分在30~40之间的划分为二类甜点,评分在20~30之间的划分为非甜点,绘制工区煤层气甜点区分布平面图。预测结果表明:一类甜点区主要位于工区中部,整体呈南北向展布,作为煤层气井位部署的规划区。研究成果对工区下一步煤层气勘探开发具有一定的指导意义。
In order to predict the rich area of coalbed methane resources in Dahe block of Dahebian syncline and explore the effectiveness of three-dimensional seismic exploration and development in Guizhou Province,based on the 4 km^(2) three-dimensional seismic exploration data volume in this area,new technologies and methods of seismic(exploration)data processing in the field of coalbed methane are used to carry out prediction.Firstly,based on the idea of progressive reservoir prediction of coalbed methane,the Jason geoscience research platform of CGG company is used to carry out seismic inversion prediction,and the plane distribution maps of four coalbed methane evaluation parameters,including coal seam thickness,coal seam gas content,coal structure and ground stress,are obtained.Then,based on the“multi-factor weighting step-by-step evaluation method”proposed in this study,each evaluation parameter such as coal seam thickness,gas content,and coal structure is separately weighted,and then the cumulative method is used to form a multi-parameter joint dessert evaluation weight factor parameter.Finally,according to the calculated comprehensive dessert evaluation parameters(the value of dessert evaluation parameters is between 20 and 50),with 10 as the first grade,the scores between 40 and 50 are divided into one type of dessert,the scores between 30 and 40 are divided into two types of dessert,and the scores between 20 and 30 are divided into non-dessert,and the distribution map of coalbed methane dessert area in the work area is drawn.The prediction results show that the first type dessert area is mainly located in the middle of the work area,which is distributed in the north-south direction as a planning area for CBM well deployment.The research results have certain guiding significance for the next step of coalbed methane exploration and development in the work area.
作者
郭志军
赵凌云
吴章利
GUO Zhijun;ZHAO Lingyun;WU Zhangli(Key Laboratory of Evaluation and Development of Unconventional Natural Gas in Complex Tectonic Area of Ministry of Natural Resources,Guiyang 550008,China;Guizhou Institute of Petroleum Exploration and Development Engineering,Guiyang 550008,China)
出处
《天然气地球科学》
CAS
CSCD
北大核心
2023年第5期928-938,共11页
Natural Gas Geoscience
基金
贵州省地质勘查资金项目“贵州上二叠统龙潭组煤层气重点层段优选和丛式井完井及压裂技术研究与示范”(编号:208-9912-JBN-UTS0),“毕节试验区煤层气资源调查评价与开发技术研究”(编号:52000021MGQSE7S7K6PRP)联合资助
关键词
大河边向斜
三维地震
煤层厚度
煤体结构
地应力
煤层气富集区
Dahebian syncline
3D earthquake
Coal seam thickness
Coal structure
In situ stress
Coalbed methane enrichment area
作者简介
郭志军(1988-),男,河南商丘人,硕士,高级工程师,主要从事天然气勘查开发及评价等研究.E-mail:352501017@qq.com;通信作者:赵凌云(1986-),男,贵州德江人,高级工程师,主要从事天然气勘查开发及评价等研究.E-mail:517543239@qq.com.
