涩北气田疏松砂岩气藏微观气水驱替实验  

Experiment of Microscopic Displacement of Gas and Water in Loose Sandstone Gas Reservoir of Sebei

作　　者：陈朝晖[1] 谢一婷[2] 邓勇[3] 

机构地区：[1]西南石油大学石油工程学院,四川成都610500 [2]"油气藏地质及开发工程"国家重点实验室.西南石油大学,四川成都610500 [3]中国石化西南分公司,四川成都610081

出　　处：《西南石油大学学报（自然科学版）》2013年第4期139-144,共6页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家科技重大专项(2011ZX05015-004)

摘　　要：利用岩石薄片模型,采用微观可视化技术,通过气水驱替实验模拟疏松砂岩气藏成藏过程中束缚水的形成以及开发过程中地层出水的渗流机理,进行了疏松砂岩气藏微观气水驱替实验,实验结果表明:(1)充气完全时,储层中仅有束缚水,地层压力的降低导致束缚水转化为次生可动水,在驱替压差下逐渐产出,但其实际出水量较小,对气井生产几乎不会造成任何影响;(2)充气不完全时,超过束缚水饱和度的地层水在原始状态下就可动,形成原生可动水,开井后原生可动水逐渐产出,由于出水量较大,对气井生产将产生严重影响;(3)利用气驱水实验得到的初始含气饱和度以及水驱气实验得到的残余气饱和度估算涩北气田最终采收程度为64.00%,分析了次生可动水及原生可动水对气藏开发的影响、气藏的合理开发年限及最终采收率,为气藏的开发提供了依据。By the slice model and microscopic visualization technology, we simulated the formation of irreducible water in the course of reservoir accumulation and the seepage mechanics of water production in the course of reservoir development with experiment about microscopic displacement. The results showed by that： in the first, when the gas displacement is complete, there is only irreducible water in the reservoir, and it will be transformed to secondary mobile water due to the reservoir pressure reduction, and then it will be produced by displacement pressure difference but the quantity is less and there is hardly any influence to the production of gas well; and then, when the gas displacement is not complete, the original mobile water will be gradually produced after opening well, and it will generate serious influence on gas well production because of higher water quantity; finally, the ultimate recovery ratio of Sebei gas field is estimated to be 64.00%, and we got the result from the initial gas saturation obtained by gas displacing water experiment and the residual gas saturation by water displacing experiment. The analysis of the effect of secondary mobile water and original mobile water on the development of gas reservoir, and of the productive year and the ultimate recovery rate is hoped to provide reference for gas field development.

关 键 词：疏松砂岩 微观可视化 驱替实验 束缚水 可动水 

分 类 号：TE312[石油与天然气工程—油气田开发工程]