鄂尔多斯盆地中部主力气层异常产能贡献微观因素解析  

Microcosmic factor analysis of yielding difference of major pay of gas field in the center of Ordos basin

作　　者：刘广峰[1] 代金友[1] 何顺利[1] 王建国[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京昌平102249

出　　处：《大庆石油学院学报》2008年第1期15-17,34,共4页Journal of Daqing Petroleum Institute

基　　金：中国石油天然气集团公司勘探与生产分公司项目(2004110024000244)

摘　　要：鄂尔多斯盆地中部气田是西气东输的重要气源之一,其主力气层(马五11-3、马五22和马五41a)物性条件相近,但气层产能贡献差异现象极其明显,从而影响气田的高效开采.以实验资料为基础,采用统计分析方法,通过薄片鉴定资料和样品压汞资料对气层微观孔隙结构进行分析对比.结果表明,尽管储层物性相近,但马五11-3孔隙结构特征明显好于马五22和马五41a,使得马五11-3的产能贡献率大大高于其储量比例.孔隙结构特征的差异是造成中部气田主力气层产能贡献差异的主要原因,对于提高其他多层合采低渗油气层的开发效果具有一定的指导意义.The gas field in the center of Ordos basin is a weathering crust related marine carbonate,formed on the paleo uplift in the northeast border in the center of the stable craton.There are three major pay formations,Ma51-3_1,Ma52_2 and Ma51a_4,they are commingled produced.However,there is a very obvious yielding difference between them:the reserve of Ma51-3_1 is 60.02 percent of total reserves but output is about 94 percent of total output.However,the sum of Ma52_2 and Ma51a_4 is 30.41 percent of total reserves but output is only 6 percent of total output.Research of the paper indicate that,pore structure of the Ma51-3_1 formation is better than Ma52_2 and Ma51a_4,and pore structure difference is the critical factor to induce the difference of production contribution.This is very important for potential exploitation of the gas field.

关 键 词：鄂尔多斯盆地 中部气田 主力气层 差异动用 孔隙结构 

分 类 号：TE311[石油与天然气工程—油气田开发工程]