Application of Digital Core Technology in Oil Saturation Appraisal of Tight Sandstone Reservoir
详细信息
- 责任者：Liu Wei (Logging Company ; Shengli Petroleum Engineering Co. ; SINOPEC ; Dongying 257096 ; China) ; Zhang Defeng
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2013
- 卷期：20(5)
- 关键词：致密砂层 ; tight sands ; 低渗透储集层 ; low permeability reservoirs
- 页码：p.593-596
- 图表：8 illus., 17 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
The accuracy of oil saturation calculated using Archie equation which is based on clean sandstone is low and the applicability is poor.Multipoint geostatistics is combined with digital image reconfiguration technology based on auto-correlation function to establish digital core modeling technology of complex pore structure.Using the digital core established,this paper numerically simulates the influences of pore structure types,shale content and formation water salinity on the saturation and cement exponents in Archie equation.The analysis results show that the intergranular pore,fracture pore and insulated dissolved pore affect Archie parameters greatly.The increasing of fracture and formation water resistivity leads to the decreasing of cement exponent and saturation exponent.But the increasing of insulated dissolved pore and shale content is totally opposite.By establishing the pore structure characteristics and the relationship between saturation and cement exponents,the accuracy of saturation can be improved using the varying parameter Archie equation.
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