Salinity mapping model and brine chemistry of Mishrif reservoir in Basrah oilfields, Southern Iraq

Awadh, Salih Muhammad; Al-Mimar, Heba S.; Al-Yaseri, Abdullah A.

doi:10.1007/s12517-018-3908-5

Cited by 17 publications

(19 citation statements)

References 13 publications

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“…It is best to measure the salinity (S ‰) at the conditions of the oil well itself (Awadh, 2018); here, the salinity value has been computed according to Lewis and Perkin (1979) as below:…”

Section: Salinitymentioning

confidence: 99%

“…The brines in all oilfields studied were modeled by isosalinty maps as shown in Fig. 7, where this application had been employed by Awadh et al 2018.…”

Section: Salinitymentioning

confidence: 99%

“…It is considered as a fair potential source rock based on 0.2-2.6 wt% TOC in the shale layers, where the major source of kerogen in the Zubair reservoir is a result of migration and accumulation from the Jurassic-Lower Cretaceous source rocks to different Cretaceous reservoir traps (Al-Ameri et al 2011). The Zubair oilfield water is of marine origin and has been increasingly salted by interaction with the reservoir rocks (Awadh 2018). Oilfield water is brine that occurs naturally within the pores of reservoir sedimentary rock associated with the oil and gas and is free to move under appropriate hydrodynamic conditions.…”

Section: Introductionmentioning

confidence: 99%

“…The physico-chemical properties of the oilfield waters impact petrophysical properties of reservoir. The chemistry of oilfield brines can help to predict pressure distribution and then determine the best-drilling sites for future exploration (Awadh 2018;Awadh et al 2018). The fluid flow direction which is an essential parameter for hydrocarbons can be suggested by hydrochemistry (Brouwer and Jansen 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Sulfate is consumed by reduction to form dissolved sulfide by bacterial biogenic processes as well as by sulfate precipitation producing H 2 S. Sulfates in oil reservoirs have a greater importance, resulting in the possibility it links with other ions such as Sr and Ba composes of sulfate precipitate is insoluble such as celestite and barite. These components lead to reservoir damage as plug pores and thus prevent the fluid passage(Al-Atabi 2009;Awadh et al, 2014;Awadh, 2018;Awadh et al 2018).…”

mentioning

confidence: 99%

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Hydrochemistry as a tool for interpreting brine origin and chemical equilibrium in oilfields: Zubair reservoir southern Iraq case study

2019

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The oil reservoir brines are very common geological fluids coexisting with hydrocarbons. The chemistry of brines is a powerful tool for determining the brine evolution and its origin, constraining fluid flow at the basin and predicting reservoir scales. This study targeted the Zubair brines in seven oilfields and investigated the geochemical evolution of brine compositions. The composition of the Zubair brine is characterized by the high average of TDS (219,408 mg/l). The contribution of cations as epm% are Na (73.7), Ca (17.32), Mg (7.45), and K (1.27), while anions contribute as Cl (99.6), SO 4 (0.23), HCO 3 (0.08), and CO 3 (0.005). The Zubair brines are of Na-Ca-chloride type, whereas sodium content is 6.3 times greater than seawater; Ca and Mg contents are thirty-four and three times greater, respectively, while Cl is seven times greater. The SO 4 ion is depleted to 0.16, due to a biodegradation. The salinity of the Zubair brine is six times more than that of seawater. The Zubair brines are characterized by an acidic pH (5.24-5.68) with a specific gravity of 1.1436, hydrocarbon saturation in pore spaces of 39%, and water saturation of 61%. The mineral saturation model indicates that Zubair brines are unsaturated. The predicted hypothetical salts are NaCl (76%), CaCl 2 (15%), and MgCl 2 (7.5%). The salts Ca(HCO 3) 2 , CaSO 4 , and KCl together form only 1.6%. The Zubair brines are characterized by Cl/Br (305) in average, greater than that of seawater (289) confirming the fluids (brines and hydrocarbons) migrated upwards from Sargelu Formation to Zubair reservoir through fractures and cracks in Gotnia Formation.

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Section: Salinitymentioning

confidence: 99%

“…The brines in all oilfields studied were modeled by isosalinty maps as shown in Fig. 7, where this application had been employed by Awadh et al 2018.…”

Section: Salinitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Hydrochemistry as a tool for interpreting brine origin and chemical equilibrium in oilfields: Zubair reservoir southern Iraq case study

2019

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Cl, Br, B, Li, and noble gases isotopes to study the origin and evolution of deep groundwater in sedimentary basins: a review

et al. 2022

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Deep groundwater characteristics provide valuable information on oil and gas extraction and evolution of hydrosphere, and nonmetallic and metallic elements in deep groundwater are raising industrial interest. There is therefore a need for a better understanding of the origin and evolution of deep groundwater in large sedimentary basins, e.g., by using non-traditional isotopes. Here, we review the constraints of isotopes of chloride (Cl), bromine (Br), boron (B), lithium (Li), helium (He), neon (Ne), and argon (Ar) on the origin and evolution of deep groundwater in large sedimentary basins. In deep groundwater, δ 37 Cl ranges from −1.96 to + 2.07‰, δ 81 Br from −1.50 to + 3.35‰, δ 11 B from + 1.10 to + 39.99‰, and δ 7 Li from −1.00 to + 31.80‰. These values either overlap or are different compared to those in freshwater, e.g., meteoric water, river water and shallow groundwater, hydrothermal fluid, seawater, subsurface brine, lake sediment, or mineral. Noble gas isotopes such as 3 He/ 4 He, 4 He/ 20 Ne, and 36 Ar/ 40 Ar are also effective tracers for deep groundwater evolution. Integrating multiple nontraditional isotopes allows to study dissolution, sedimentation, evaporation, and mixing of different waters in deep aquifers.

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Water resources management and sustainability over the Western desert of Iraq

et al. 2019

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Salinity mapping model and brine chemistry of Mishrif reservoir in Basrah oilfields, Southern Iraq

Cited by 17 publications

References 13 publications

Hydrochemistry as a tool for interpreting brine origin and chemical equilibrium in oilfields: Zubair reservoir southern Iraq case study

Hydrochemistry as a tool for interpreting brine origin and chemical equilibrium in oilfields: Zubair reservoir southern Iraq case study

Cl, Br, B, Li, and noble gases isotopes to study the origin and evolution of deep groundwater in sedimentary basins: a review

Water resources management and sustainability over the Western desert of Iraq

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