Sedimentary units-layering system and depositional model of the carbonate Mishrif reservoir in Rumaila oilfield, Southern Iraq

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

doi:10.1007/s40808-018-0510-5

Cited by 32 publications

(28 citation statements)

References 12 publications

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“…The Mishrif Formation is the main oil reservoir in southern and central Iraq, which belongs to the shallow continuous carbonate deposits. The periodic changes of sea level resulted in the deep-water deposits, during which the outer continental shelf and basin deposits outside the Rumaila Formation was formed 28 , 29 . The formation of carbonate reservoirs in the Mishrif Formation is closely related to the tectonic evolution background of the Arabian Gulf Basin.…”

Section: Geological Settingmentioning

confidence: 99%

Study on discriminant method of rock type for porous carbonate reservoirs based on Bayesian theory

Fang

Hong

2021

Sci Rep

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Rock typing is an extremely critical step in the estimation of carbonate reservoir quality and reserves in the Middle East. In order to recognize the rock types of carbonate reservoirs in the Mishrif Formation better, classify the reservoirs accurately, and establish the permeability model in line with the study area precisely, it is necessary to study the recognition method conforming to the actual situation of the study area. The practice shows that the current recognition methods based on capillary pressure curve, flow unit and NMR logging data can effectively distinguish rock types, but a large number of accurate experimental data are required, which can only be applied in a few cored well, however, cannot be applied in the whole oil field. In this study, based on core, thin section, logging data, the sedimentary characteristics of carbonate reservoir, logging response of four rock types as well as porosity and permeability characteristics of Mishrif Formation in W are comprehensively studied. Based on Bayesian stepwise discriminant theory in multivariate statistics, the Bayesian discrimination model based on conventional logging data is established. The examining results showed that, compared with the description of logging and coring, the accuracy of Bayesian discriminant model and cross confirmation rate have achieved more than 80% for the original sample. Reliability verification showed that the matching degree of the rock type recognized in the non-cored well with the core and mud logging was as high as 90%, which matched the depositional environment of the entire region. The study results confirm the validity and generalizability of the Bayesian method to identify and predict rock types, which can be applied to the entire Middle East region to solve the problem of the lack of core data to accurately evaluate the quality of non-cored wells and accurately predict production, meeting the needs of actual reservoir evaluation and production development in the Middle East.

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Section: Geological Settingmentioning

confidence: 99%

Study on discriminant method of rock type for porous carbonate reservoirs based on Bayesian theory

Fang

Hong

2021

Sci Rep

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“…To the west and south direction over Rumaila Formation, the shallow facies was developed [19]. After initial flooding of the platform, mixed shallow-water and planktonic facies developed on top of the platform [18].…”

Section: No22-(3) 2019 Journal Of Petroleum Research and Studies (Jprands)mentioning

confidence: 99%

“…Reservoir mineralogyReservoir heterogeneities are known to exist in the Mishrif Formation, which result in significant laterally and vertically variations in reservoir properties including permeability and porosity as well[18]. This non-uniformity may be a reflection of the depositional environment and sedimentary facies.…”

mentioning

confidence: 99%

The Role of Chemistry of the Oil-Field Water in the Distribution of Reservoir Pressures: A Case Study of Mishrif Reservoir in the Southern Oil-Fields, Iraq

Al-Mimar

Awadh

2021

Journal of Petroleum Research and Studies

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Mishrif Formation is the main reservoir in oil-fields (North Rumaila, South Rumaila, Majnoon, Zubair and West Qurna) which located at Basrah southern Iraq. The Inductively coupled plasma-Mass spectrometer (ICP-MS) was used for the water chemistry analysis and Scanning Electron Microprobe (SEM) for the purpose of mineralogy diagnosis. A weak acidic water of salinity six-time greater than seawater plays a role in generating the formation pressure and controlling the fluid flow. The potentiometric subsurface maps were modeled and the direction of super-pressure sites that are of a great importance in the oil exploration were marked to pay attention during future drilling.

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“…Basrah is characterized by abundant of oil production (Awadeesian et al, 2018;Al-Mimar et al, 2018;Awadh et al, 2019). When designing any engineering facility in an oilfield site, it is necessary to know the geotechnical properties of the soil and the effect of contaminant material from different sources and the surrounding environmental conditions on them (Jamal and Shahalam, 2002).…”

Section: Introductionmentioning

confidence: 99%

The Effect of Oil Contamination on some Geotechnical Properties of West Qurna Oilfield Soils at Basrah, Southern Iraq

Ahmed

Mahmood

2021

IGJ

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Oil contamination in soils causes several geotechnical problems that must be considered during construction. The contamination occurs due to oil seepage which could happen during oil explorations and production processes or oil transportation. The site of West Qurna oilfield in Basrah was selected for this study because it has witnessed oil seepages many times. In order to study the significant impact on geotechnical properties of soils in the West Qurna site, as uncontaminated bulk soil sample was taken at a depth of 1 m, and crude oil was added at weight ratios of 2, 4, 6, 8, and 10 %. Laboratory tests were performed on all samples; these tests included particle size distribution, moisture content, Atterberg’s limits, consolidation, unconfined compressive strength, and water absorption. The results show that soil at the West Qurna site is clayey silt with little sand and the moisture content is 29.21%. The values of liquid limit and plasticity index were gradually decreased, while the plastic limit was increased with increasing of crude oil in the soil of study. There was an increase in consolidation coefficients [compressive index, swelling index, pre-consolidation pressure, and coefficient of consolidation] with an increase in the percentages of crude oil in the soil. The results also show that there was a decrease in the values of unconfined compressive strength and absorption of water as the crude oil was increased in the soil.

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Sedimentary units-layering system and depositional model of the carbonate Mishrif reservoir in Rumaila oilfield, Southern Iraq

Cited by 32 publications

References 12 publications

Study on discriminant method of rock type for porous carbonate reservoirs based on Bayesian theory

Study on discriminant method of rock type for porous carbonate reservoirs based on Bayesian theory

The Role of Chemistry of the Oil-Field Water in the Distribution of Reservoir Pressures: A Case Study of Mishrif Reservoir in the Southern Oil-Fields, Iraq

The Effect of Oil Contamination on some Geotechnical Properties of West Qurna Oilfield Soils at Basrah, Southern Iraq

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