Stratigraphic features within the Ratawi Shale Member of the Lower Cretaceous Ratawi Formation and their hydrocarbon prospectivity in Sudaira – Abdali area, North Kuwait

Arasu, Raju T.; Nath, P.K.; Khan, Balbir; Ebrahim, M.; Rahaman, Mafizar; Bader, Sara; Abughneej, Ali

doi:10.1190/segam2012-1034.1

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…The upper Ratawi member is also known as the Ratawi Shale member which is mainly composed of marine shale/claystone, interbedded by siltstone and fine-grained sandstone, and limestone streaks (Arasu et al, 2012). The origin of the sandstone is attributed to the uplift and erosion of the Arabian Shield (Al-Fares et al, 1998;Sharland et al, 2001).…”

Section: Ratawi Formationmentioning

confidence: 99%

“…Major oil discoveries were found in the lower part of the Ratawi Limestone Member at Wafra and Umm Gudair fields since the 1950s. However, in the last 10 years, Kuwait Oil Company has shifted its exploration efforts to the Ratawi Shale Member where it tested oil in the Umm Gudair Field in the south, Rugae in the southwest, and Sabriyah, Raudhatain, and Abdali fields in north Kuwait (Arasu et al, 2012. And Al-Tendail et al, 2012.…”

Section: Ratawi Formationmentioning

confidence: 99%

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Petroleum Geology of Kuwait

Naqi

Alsalem

Qabazard

et al. 2022

Regional Geology Reviews

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Kuwait has proven conventional oil reserves of about 100 billion barrels which makes it one of the major oil-producing countries worldwide. Most of this reserve is found in Cretaceous and Jurassic with minor quantities in the Paleogene sedimentary successions. Most hydrocarbon production comes from the siliciclastic Burgan Formation which is the most important reservoir in Kuwait. The Jurassic and Lower Cretaceous exhibit good quality source rocks that charged most of the hydrocarbon reservoirs in Kuwait and entered the oil window in Late Cretaceous to Eocene. Most of the hydrocarbon is trapped in very gentle four-way closure structures that are related to the deep-seated fault system of the Arabian Peninsula such as Khurais-Burgan Anticline. Hydrocarbon reservoirs in Kuwait are sealed and capped mainly by shale rocks and to a less extent by evaporites. In the last 15 years, Kuwait Oil Company (KOC) displayed interest in commercially exploiting unconventional hydrocarbon reserves and started laying significant emphasis on the exploration and development of unconventional resources. The aim of this work is to summarize the different petroleum systems of Kuwait including the Paleozoic, Mesozoic, and Cenozoic systems.

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Section: Ratawi Formationmentioning

confidence: 99%

Section: Ratawi Formationmentioning

confidence: 99%

Petroleum Geology of Kuwait

Naqi

Alsalem

Qabazard

et al. 2022

Regional Geology Reviews

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show abstract

“…The Ratawi Formation comprises siliciclastic mudstones and calcareous siliciclastic mudstones with tiny lime-mudstone intercalated with thin, muddy sandstones. The entire Ratawi Shale interval is thought to have been deposited in calm offshore circumstances with intermittent bottom current interruptions, most likely due to storms (Azim et al 2019;Arasu et al 2012). The Lower Cretaceous period recorded two transgressive-regressive cycles: the older cycle spanning Minagish and Ratawi formations and the younger cycle spanning Zubair and Shuaiba Formations (Haq and Al-Qahtani 2005;Sharland et al 2001).…”

Section: Stratigraphy and Petroleum Systemmentioning

confidence: 99%

Investigation of the Cretaceous total petroleum system using wireline logs, core, and geochemical data in Bahrah Field, Northern Basin, Kuwait

Aladwani

Al-Enezi

Diab

2022

J Petrol Explor Prod Technol

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We used wireline logs, seismic, core data, fluid analysis, and geochemical data to investigate the total petroleum system in the Cretaceous period. Also, we used thin sections and fluid analysis throughout the investigation. Python’s 1-D backstripping technique was used to determine the abrupt changes in subsidence rates and their effect on the reservoir’s quality. The results defined that the potential reservoirs include, from top to bottom, Mauddud, Upper Burgan, Lower Zubair, and Ratawi Limestone. The reservoir facies reflect different environments between the carbonate ramp (Mauddud, Ratawi Limestone, and Minagish reservoirs), delta plain (Zubair reservoir), and margin shelf (Burgan reservoir), and its quality is graded from Mauddud to Ratawi Limestone from top to bottom. The field lies up-dip under Kuwait Bay and represents the continuation of super-giant Greater Burgan Field. It filled with the spilled oil from the down-dip Raudhatain and Sabriyah fields through a structural saddle. Two major tectonic events subsided the deposited sediments by 0.25 mm/year, besides three minor events; however, these events did not affect all Cretaceous reservoirs but only according to their deposition times. Furthermore, according to burial history, thermal maturity, and reservoirs’ fluid geochemical analysis, the Sulaiy (Makhoul) and Minagish formations are likely the primary sources for all Cretaceous reservoirs.

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“…The field is divided into the western Umm Gudair sector, the eastern Umm Gudair sector, and the southern Umm Gudair sector ( Figure 1 B). The Minagish Oolite/Middle member of the Minagish Formation has moderate to high porosity, is hydrocarbon-bearing, and is considered the main contributor of hydrocarbon production in the Umm Gudair Field ( Arasu et al., 2012 ). The Minagish Formation has been deposited on a broad, prograding carbonate, has a thickness range from 160 m in Burgan Field in the south to 360 m in the northern fields, and has three members.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the hydrocarbon source rock and the reservoir characterization of the Minagish Formation using wireline logs

Aladwani

2022

Heliyon

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Stratigraphic features within the Ratawi Shale Member of the Lower Cretaceous Ratawi Formation and their hydrocarbon prospectivity in Sudaira – Abdali area, North Kuwait

Cited by 4 publications

References 4 publications

Petroleum Geology of Kuwait

Petroleum Geology of Kuwait

Investigation of the Cretaceous total petroleum system using wireline logs, core, and geochemical data in Bahrah Field, Northern Basin, Kuwait

Evaluation of the hydrocarbon source rock and the reservoir characterization of the Minagish Formation using wireline logs

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