基于GIS的松辽盆地北部深层气运移路径模拟  

GIS-BASED 3D SIMULATION OF MIGRATION PATHWAYS OF DEEP NATURAL GAS IN THE NORTHERN SONGLIAO BASIN

作　　者：刘学锋[1] 钟广法[2] 李先华[3] 陈强[4] 

机构地区：[1]长江大学 [2]"海洋地质"国家重点实验室.同济大学 [3]上海大学通信与信息工程学院 [4]上海工程技术大学

出　　处：《天然气工业》2006年第5期33-36,共4页Natural Gas Industry

基　　金：国家"973"计划项目(编号:G2000078501);上海市重点学科建设项目(编号:T0102);湖北省教育厅科学研究基金重点项目(编号:2004Z0111)的联合资助。

摘　　要：油气运聚史模拟是盆地诸史模拟中难度最大、最复杂的内容之一。油气在输导层中运移聚集的路径受控于输导层顶面的三维几何形态。以地理信息系统(GIS)的栅格数据结构为基础,按照油气运移的机理,开展了基于GIS支持下的松辽盆地北部深层天然气运移路径的三维模拟研究,构建了基于GIS的油气运移路径模拟算法,并提出了相应的模拟流程,成功地模拟出了该盆地深层天然气的运移路径,有效揭示了该盆地晚白垩世天然气主运移期天然气的运聚规律。模拟结果表明在该盆地晚白垩世天然气的主运移期,与生气凹陷毗邻的构造及位于生气凹陷北部和南部的构造均处于天然气运移路径上,为有利的油气聚集区;而其他构造则大多位于天然气运移路径之外,基本上没有天然气的聚集。这一研究结论与现有的勘探实践相吻合。Simulation of hydrocarbon migration and accumulation is one of the most difficult and complicated contents of basin modeling. The pathway of hydrocarbon migration and accumulation in carrier beds is controlled by the 3D geometry of the top surface of carrier beds. Based on GIS raster data structure and according to the mechanism of hydrocarbon migration, GIS-based 3D simulation is performed on the migration pathways of deep gas in the northern Songliao Basin and a GIS-based modeling algorithm of hydrocarbon migration pathway is established and its simulation process is proposed. The migration pathway of deep gas in this basin is successfully simulated and the migration and accumulation patterns of gas during Late Cretaceous, the major natural gas migration period, in this basin are effectively revealed. In the main period of gas migration during Late Cretaceous, both the structures adjacent to the gas-generating sag and the structures in the northern and southern parts of the gas-generating sag, being located on the pathway of gas migration, will be favorable areas for oil/gas accumulation; while most of the other structures, being located outside the pathway of gas migration, will contain no gas at all. This conclusion coincides with current exploration results.

关 键 词：地理信息系统 松辽盆地 北 晚白垩世 深层气 油气运移 路径 运移时间 三维模拟 

分 类 号：P618.130[天文地球—矿床学]