碳酸盐岩储层特征及影响因素分析——以靖边气田陕200井区马五4^1储层为例

Characteristics and influential factors of the carbonatite reservoir： a case of M54^1 gas reservoir in Shaan 200 borefield of Jingbian Gasfield

在系统分析、总结前人对靖边气田陕200井区研究工作的基础上,运用岩心观察、薄片分析、常规物性测试和高压压汞等方法进行系统分析,研究鄂尔多斯盆地靖边气田陕200井区奥陶系马五14储层特征及其储层储集性能的影响因素。马五14储层为低孔、低渗、低丰度的薄气层,以云坪和膏云坪沉积微相为主,储集空间以各类溶孔和膏模孔等次生孔隙为主,且储层裂缝发育,缝-洞-孔为最有利的孔隙组合。储层在构造运动和沉积-成岩作用控制下,天然气分布呈现一定的规律性:西南部为天然气富集区,中东部次之,西北部和东南部最差。

To study the characteristics anti controlling factors of the Ordovlclan M54Reservmr in Shaan 200 Bore- field of Jingbian Gasfield in Ordos Basin. Based on predecessors＇ research, the methods of core observation, thin section analysis, porosity and permeability analysis, mercury intrusion were used to multidisciplinarily analyse the characteristics and influential factors. M5~ reservoir is a low porosity, low permeability, low abundance and thin gas formation reservoir with dolomite and dough-dolomite tidal flat. All kinds of corroded hollows being secondary pores are main saving spaces, corroded fissures and crevices are good to enrich reservoir bulk volume and gas circulating, split and limestone cave and hole are the best pore array. The reservoir is controlled by tectonic movement, deposi- tion and diagenesis. The southwest of the study area is most abundant of gas, and the middle east takes second place, meanwhile the northwest and southeast are the poorest reservoir.