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Mechanisms and experimental research of ion-matched waterflooding to enhance oil recovery in carbonate reservoirs: A case of Cretaceous limestone reservoirs in Halfaya Oilfield, Middle East
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PENG Yingfeng,LI Yiqiang,ZHU Guangya,PAN Deng,XU Shanzhi,WANG Xiuyu
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Table 6 Basic data of the natural core sample from the Mishrif reservoir in Halfaya oilfield.
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| Research stage | No. of schemes | Diameter/cm | Length/cm | Porosity/% | Initial oil saturation/% | Permeability/10-3 μm2 | Optimum ranges
of TDS and IS | 1# | 3.8 | 6.5 | 14.0 | 73.7 | 12.2 | | 2# | 3.8 | 6.5 | 21.1 | 79.7 | 33.7 | Preferred water
verification | 3# | 3.8 | 6.0 | 7.1 | 72.9 | 30.1 |
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