新疆石油地质

›› 2015, Vol. 36 ›› Issue (5): 1-1.doi: 10.7657/XJPG20150516

• 论文 •    

基于充注模拟实验的致密砂岩气成藏过程分析——以鄂尔多斯盆地为例

赵子龙，赵靖舟，曹 磊，王江涛   

  1. (1.西安石油大学 地球科学与工程学院,西安 710065;2.陕西省油气成藏地质学重点实验室,西安 710065)
  • 出版日期:2019-01-01 发布日期:1905-07-15

Accumulation Process Analysis on Tight Sandstone Gas Based on Charging Simulation Experiment: An Example of Ordos Basin

ZHAO ZilongZHAO JingzhouCAO LeiWANG Jiangtao   

  1. (1. School of Earth Sciences and Engineering, Xian Shiyou University, Xin, Shaanxi 710065, China; 2.Shaanxi Key Lab of Petroleum Accumulation Geology, Xin, Shaanxi 710065, China)
  • Online:2019-01-01 Published:1905-07-15

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摘要： 基于充注模拟实验，对鄂尔多斯盆地苏里格气田和榆林气田致密砂岩气成藏过程进行了分析，建立了天然气充注模式。研究表明，致密砂岩中天然气的充注存在启动压力，不符合经典的达西定律，主要为非达西流。致密砂岩气成藏孔隙度和渗透率的下限分别为1.5%和0.03 mD，上限分别为10.0%和1.0 mD，结合生产实践，进一步确定其工业气流的孔隙度和渗透率的下限分别为4.0%和0.07 mD. 天然气的充注成藏可以分为3个阶段：非达西流充注（相对缓慢）阶段、非达西流充注（相对快速）阶段和天然气充注达到极限含气饱和度稳定阶段，其中非达西流充注（相对缓慢）阶段是天然气充注成藏的主要阶段。

Abstract: Based on the charging simulation experiment, this paper analysed the accumulation process of tight sandstone gas from Sulige and Yulin gas fields in Ordos basin, and also established a natural gas accumulation pattern. The starting pressure is existed in the tight sandstone gas, while such a charging is mainly non Darcy’s flow instead of following to Darcy Law. The porosity and permeability cutoff values of the accumulation physical property in tight sandstone gas are respectively1.5%and0.03mD, their upper cutoff values are respectively10.0%and1.0mD. Combined with production practices, further determination of the porosity and permeability cutoff values of industrial gas flow are4.0%and0.07mD, respectively. Three stages of the natural gas accumulation in tight sandstone are proposed, namely, relatively slowly charging stage of non?Darcy flow, relatively rapidly charging stage of non?Darcy flow, and stable stage of gas saturation while natural gas charging reaches limit gas saturation. The relatively slowly charging stage of non?Darcy flow is a major stage of charging accumulation among them

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