Ahdeb oil field, Mesopotamian Basin, Iraq: Reservoir architecture and oil charge history

Deng, Hucheng; Fu, Meiyan; Huang, Taiwen; Gluyas, Jon; Tong, Mingsheng; Wang, Xingjian; Zhou, Wen; Liu, Fei

doi:10.1306/0424181617217089

Cited by 9 publications

(13 citation statements)

References 64 publications

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“…The Zubair and Rumaila oil fields, in general, and the Mishrif and Zubair formations, in particular, are the most significant producers of hydrocarbons in the Iraqi field. The Mishrif and Zubair formations originate from the Chiagara in the upper Jurassic and Sargelu in the middle Jurassic, which serve as the parent rocks, [10].…”

Section: Area Of Studymentioning

confidence: 99%

Variation of Total Stresses During Field Operation Using Finite Element Technique, Zubair Oil Field.

Faraj¹,

Salih²,

Hussein³

et al. 2023

IJOGR

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The Zubair oil field is predominantly plagued by geomechanical issues, which can result in significant non-productive time. The aim of this study is to present a reservoir model and a geomechanical model utilizing the finite element method. The intriguing data consisting of logs, calibration data, drilling reports, and mud reports were utilized to construct one-dimensional models (1D) for each well using Techlog 2015 software. Furthermore, the 3D geomechanical model was built utilizing Petrel 2017 software, while the finite element technique was implemented using the CMG 2018 program to predict the total stress states during production or injection operations in the field over a span of 10 years.The analysis results of all mechanical rock properties in the 3D geomechanical model revealed that Shuaiba and Al-Hammar domes were insufficient for maintaining stable wells, particularly in the Tanuma formation. However, the Mishrif formation displayed higher stability despite production. Furthermore, the 3D finite element model exhibited that the total horizontal stress decreased during production and increased in injection wells. This variation would result in an increase in the effective horizontal stress during production and a decrease in injection wells. Moreover, the effective vertical stress increased during production and decreased during injection wells. Based on these outcomes, it can be concluded that production could trigger an increase in the differential stress leading to rock shear failure, whereas in injection cases, pore pressure increased, and this caused tensile failure.

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Section: Area Of Studymentioning

confidence: 99%

Variation of Total Stresses During Field Operation Using Finite Element Technique, Zubair Oil Field.

Faraj¹,

Salih²,

Hussein³

et al. 2023

IJOGR

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“…Ratawi Formation samples had 0.60 to 1.40 wt.% TOC, mature with Ro = 0.50-1.00% and Yamama Formation's samples contain 0.30 to 2.70 wt.% TOC while samples from Sulaiy Formation have the highest TOC wt.% reaching up to 10.00 wt.% (Al-Ameri et al, 2009;Abeed, 2012). Awadh & Hussien, 2015;Eqal, 2015;Idan et al, 2015;Al-Ahmed & Al-Obaidi, 2016;Al-Khafaji et al, 2017;Hasan & Al-Dulaimi, 2017;Deng et al, 2018).…”

Section: Geological Settingmentioning

confidence: 99%

“…This possibility is based on similar biomarker correlation parameters. The younger Cretaceous and the older Jurassic sequences are excluded from being a source due to a great terrestrial influence and an extremely over mature status, correspondingly (Abeed, 2012;Deng et al, 2018).…”

Section: Depositional Environment Of Oils and Oil-source Correlationmentioning

confidence: 99%

“…Compositional resemblances of hopane and sterane biomarkers of crude oils from Tuba, Rumayla, Luhays, Nahr Umar, Safwan, West Qurna, Zubair, and Ratawi oilfields and those that belong to prospective source rocks proposed the Sulaiy and Yamama formations as the effective source beds (Abeed et al, 2012;Deng et al, 2018). Bulk properties and biomarker parameters of oils in Ratawi-3b, Ratawi-5, Ratawi-7, Luhays-12, Subba-8b, and Tuba-3b wells and of extracts of Yamama Formation indicate multi source of hydrocarbons with some pay having Jurassic and Lower Cretaceous source affinity (Al- Ibrahim & Al-Ameri, 2015).…”

Section: Depositional Environment Of Oils and Oil-source Correlationmentioning

confidence: 99%

“…: Abeed et al, 2012; Al-Ahmed & Al-Obaidi, 2016; Al-Agaili, 2012; Al-Ameri et al, 2009; Al-Ameri et al, 2011; Al-Ameri & Al-Khafaji, 2014; Al-Ameri & Al-Zaidi, 2014; Al-Ameri et al, 2015; Al-Ibrahim & Al-Ameri, 2015; Al-Khafaji et al, 2017;Al-Khafaji, 2015;Al-Musawi, 2010;Awadh & Hussien, 2015;Deng et al, 2018;Eqal, 2015;Hasan & Al-Dulaimi, 2017;Idan et al, 2015. …”

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confidence: 99%

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Crude Oil Classification Based On Age And Provenance From The Southern Iraq: A Review

Abdula¹

2020

BGSM

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A collection of 165 crude oils, 12 oil seeps, and 24 extracts and recovered samples from 25 oil exploratory wells and 6 oil seeps in the Southern Mesopotamian Basin were studied. Biomarker configurations and other organic geochemistry parameters were used to discover the depositional environments and to classify the oil samples as provenance groups. Petroleum liquids were geochemically classified into four groups. The first group of oils, Middle Jurassic Zagros Fold Belt, is located in the Maysan, Basra, and Thi qar provinces of the basin that has pristane/phytane (Pr/Ph) proportions ≤0.97 and contains sufficient gammacerane. Methylphenanthrene index 1 (MPI 1) values show that the first group of oils is mature. Oils from Group 2, Upper Jurassic–Lower Cretaceous Sulaiy/Yamama, by disparity have Pr/Ph proportions between 0.72 and 1.12 and relatively moderate C28/C29 steranes, 0.52-0.88. Ts/Tm ratios indicate thermal maturity for Group 2 oils. Unlike oils from other groups, the oils from Group 3, Cretaceous to Tertiary oils, in Subba Field hold the highest canonical variable (CV) values that range between 0.43 and –2.30. The fourth group, Late Triassic-Middle Jurassic oil seeps, is the oldest among all groups. This group holds an average carbon isotope ratio –28.25‰ and –28.10‰ for saturates and aromatics respectively, which are the lowest values among all oils in the studied region. The Tithonian-Berriasian Sulaiy/Yamama oils further divided into three subgroups. The first subgroup, A, has carbon preference index (CPI) values of ≤1.08 (average 0.86) and C28/C29 sterane of 0.56-1.13 with an average of 0.65. Second subgroup, B, holds CPI ≤1.18 (average 0.99) and C28/C29 sterane 0.55-0.82 with an average of 0.63. The last subgroup, C, has CPI values ≤0.93 (average 0.85) and high C27 and C29 steranes (average 46.5% and 39.61%, respectively). In the same way, the Group 3 can be further subdivided into two subgroups based on values of carbon isotopes for saturates and aromatics. The oils from this group are heterogeneous and can be further divided into Tertiary Subgroup and Cretaceous Subgroup.

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Microfacies and reservoir quality of the Middle Cretaceous Rumaila Formation in the AD oilfield, central Mesopotamian Basin, southern Iraq

Liu

Shi

Liu

et al. 2021

Journal of Asian Earth Sciences

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Ahdeb oil field, Mesopotamian Basin, Iraq: Reservoir architecture and oil charge history

Cited by 9 publications

References 64 publications

Variation of Total Stresses During Field Operation Using Finite Element Technique, Zubair Oil Field.

Variation of Total Stresses During Field Operation Using Finite Element Technique, Zubair Oil Field.

Crude Oil Classification Based On Age And Provenance From The Southern Iraq: A Review

Microfacies and reservoir quality of the Middle Cretaceous Rumaila Formation in the AD oilfield, central Mesopotamian Basin, southern Iraq

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