天然气优势运移路径的动态追踪——以川西坳陷白马庙气藏为例  

Dynamic tracking of dominant migration pathways for natural gas:An example from Baimamiao gas reservoir in West Sichuan Depression

作　　者：吴东胜[1] 李泽坤 林小云[1] 刘柏 潘仁芳[1] WU Dongsheng;LI Zekun;LIN Xiaoyun;LIU Bai;PAN Renfang(School of Geosciences,Yangtze University,Wuhan 430100,Hubei;Northwest Sichuan gas mine,Southwest Oil and Gas Field Company,PetroChina,Mianyang 621709,Sichuan)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]中国石油西南油气田分公司川西北气矿,四川绵阳621709

出　　处：《长江大学学报（自然科学版）》2024年第6期1-8,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项“致密储层地震属性解析预测技术研究”(2016ZX05047-002-003);中国石油西南油气田分公司科研项目“川西南部地区沙溪庙组砂体展布特征研究”(20200301-25)。

摘　　要：油气优势运移路径的分布受运移动力、输导体系、烃源岩、圈闭及其时空配置等多种地质因素影响,其空间形态的准确预测及追踪对于油气藏定位勘探和降低勘探风险具有重要意义。应用白马庙构造的构造、沉积、输导层和烃源岩等地质研究成果,构建不同运移阶段的供烃模式、运移动力和输导体系等基础地质模型。以GIS为基础平台,将地质评价结果和表征参数转换为数值模型,采用基于概率的预测技术实现天然气优势运移路径的动态追踪。结果表明,白马庙气藏经历了燕山期成藏和喜山期调整等两个阶段,天然气运移可分为成藏期垂向运移、成藏期浅层侧向运移和调整期侧向运移等3个过程,应用地质综合研究成果构建初始地质模型,基于GIS动态追踪天然气优势运移路径,应用已有勘探成果验证和分析预测成果,进而可为圈闭目标优选和定位评价提供理论和技术支持。The distribution of dominant migration pathways for oil and gas is influenced by various geological factors,including migration dynamics,transport systems,source rocks,traps,and their spatial and temporal configurations.Accurate prediction and tracking of their spatial morphology are of great significance for locating oil and gas reservoirs and reducing exploration risks.This article applies the geological research results of Baimamiao structure,including tectonics,sedimentation,carrier beds,and source rocks,to construct basic geological models such as hydrocarbon supply models,migration dynamics,and carrier systems at different migration stages.Based on GIS,the geological evaluation results and characterization parameters are converted into numerical models,and probabilistic prediction techniques are used to achieve dynamic tracking of preferential migration pathways for natural gas.The results show that Baimamiao gas reservoir experienced two stages of Yanshanian reservoir formation and Himalayan adjustment.The migration of natural gas can be divided into three processes:vertical migration during the reservoir formation stage,shallow lateral migration during the reservoir formation stage,and lateral migration during the adjustment stage.The application of comprehensive geological research results to construct an initial geological model,dynamic tracking of the dominant migration pathway of natural gas based on GIS,and the application of existing exploration results to verify and analyze the prediction results can provide theoretical and technical support for the optimization and positioning evaluation of trap targets.

关 键 词：优势运移路径 动态追踪 数值模拟 白马庙构造 川西坳陷 

分 类 号：P618.13[天文地球—矿床学] TE122.1[天文地球—地质学]