tailieunhanh - Reservoir Formation Damage Episode 2 Part 6

Tham khảo tài liệu 'reservoir formation damage episode 2 part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Inorganic Scaling and Geochemical Formation Damage 357 text continued from page 351 A ỉ2Si2O5 ƠH 4 7H2O o 2 a I 0H 4 2H2SiO4 2H 13 4-8 A comparison of Figures 13-12A and B reveals that the Canyon Reef water is compatible with the JMU connate water with respect to kaolinite whereas the Mule Shoe water becomes incompatible upon large volumes of water injection into the reservoir. Saturation Index Charts for Carbonates and Sulfates Using the program Schneider 1997 generated the saturation index curves for the mixing of waters for calcite CaCO3 magnesite MgCO3 dolomite CaMg CƠ3 2 witherite BaCO3 strontianite SrCO3 anhydrite CaSO4 gypsum CaSO42H2O barite BaSO4 and celestine SrSO4 given in Figures 13-13 through 16 respectively. Figures 13-13A and B show the barite saturation index charts for mixing the JMU connate water with the Mule Shoe Ranch and Canyon Reef waters respectively. It is apparent that mixing sufficient volumes of the Mule Shoe Ranch water with the JMU connate water will induce barite precipitation. But the mixtures of the Canyon Reef and JMU connate waters will not lead to any precipitation. Figures 13-14A and B show the celestine saturation index charts for mixing the JMU connate water with the Mule Shoe Ranch and Canyon Reef waters. Figure 13-14A shows that around 80 volume Mule Shoe Ranch water content the water mixture is nearly saturated with celestine. However the mixtures of the Canyon Reef and the JMU connate waters do not yield any precipitation. As indicated by the water analysis presented in Table 13-1 the JMU connate water is undersaturated by anhydrite and gypsum. Therefore the saturation index charts shown in Figures 13-15A and B indicate no possibility of anhydrite or gypsum precipitation as a result of mixing JMU connate water with any portions of the Canyon Reef water. The water analysis given in Table 13-1 indicate that the JMU connate water is supersaturated by calcite and dolomite and undersaturated by witherite. .

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