摘要
硫酸盐热化学还原作用(TSR)是普遍发生于碳酸盐岩层系中的地质现象,不仅能够引起油气藏中H2S的富集,其产生的各种酸性气体还对碳酸盐岩储层具有明显的溶蚀改造作用。总结了TSR反应发生的温度范围、动力学机制、反应过程中的热释放、参与反应的各个组分及其产物,并以川东北地区飞仙关组为例探讨了TSR反应对碳酸盐岩储层的改造作用,揭示了白云石化作用和深埋藏溶蚀作用早期对飞仙关组储层改造作用以及TSR在埋藏后期对储层储集性能进一步改善的作用。
In carbonate rocks,thermochemical sulfate reduction(TSR)is a common geological phenomenon.Not only it brings about H2 S accumulating in reservoir,but also all generated acid gas holds an obvious dissolution reforming effect on carbonate-rock reservoir.The temperature scale,dynamic mechanism,heat release,and participated components and their products during TSR reaction are analyzed.Taking Feixianguan Formation,Northeastern Sichuan Basin,as an example,this paper explores the reform effect of TSR on carbonate-rock reservoir.Results show that in the early stage,both dolomitization and burial dissolution are constructive to this reservoir,whereas TSR just contributes to improving reservoir property in the later burial stage.
出处
《天然气技术与经济》
2013年第4期25-28,78,共4页
Natural Gas Technology and Economy
