油气运移时间的计算  

Calculation on migration time of oil and gas

作　　者：李传亮[1] 龙武[2] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石化西北油田分公司工程技术研究院,新疆乌鲁木齐830011

出　　处：《油气地质与采收率》2010年第6期68-70,共3页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项课题"塔里木盆地大型碳酸盐岩油气田勘探开发示范工程"(2008ZX05049)

摘　　要：油气运移对油气成藏具有重要意义,但传统的油气运移研究定性的内容较多,定量的内容较少,且一直没有建立起油气运移时间的计算公式。油气运移,实际上就是油气在岩石中的渗流过程。根据渗流力学理论,建立了油气初次运移和二次运移时间的理论计算公式。结果表明,油气运移的时间都很短,与漫长的地质时期相比可谓一瞬,因此,油气运移时间不是制约油气成藏的主要因素。气水或油水分异调整和平衡的时间亦都很短,气水倒置或油水倒置难以维持。运移之中的油气十分分散,且丰度极低,不具有开采价值,目前开采的油气藏都是运移完成之后的油气聚集。应用油气运移时间的计算公式,可定量研究地层的油气运移时间问题。Migration of oil and gas is the most important aspect for the reservoir accumulation.However,the conventional research of oil andgas migration is more qualitative than quantitative and the calculation formula of migration time of oil and gas has not been deducedso far,which is a drawback for the theory.Migration of oil and gas is the flow of oil and gas in porous media in fact.Based on thefluid mechanics in porous media,the calculation formulae of primary and secondary migration of oil and gas are established in thispaper.According to the calculation results of the formulae herein,the migration time of oil and gas is relatively short in comparisonwith the long geological history.So the migration lime of oil and gas is not the key factor of reservoir accumulation.And,the time ofseparation and balancing of gas-water or oil-water is quite short,so,water-over-gas or water-over-oil distribution can not be keptstable.The oil and gas in migration is extremely dispersed,and is not worthwhile to develop because of its low abundance.The oiland gas reservoirs in developing today are those accumulated after migration is Finished. With the formulae proposed in this paper,migration times can be calculated quantitatively in any kind of formation.

关 键 词：初次运移时间 二次运移时间 垂向运移 水平运移 计算公式 

分 类 号：TE112.12[石油与天然气工程—油气勘探]