Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq

Sun, Wei; Qiao, Zhanfeng; Guang-hua, Shao; Sun, Xuewei; Gao, Jixian; Cao, Peng; Zhang, Jie; Chen, Wangang

doi:10.1016/s1876-3804(20)60091-x

Cited by 24 publications

(6 citation statements)

References 21 publications

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“…Various methods for architecture analysis were used, including field outcrops measurements of modern sediments, indoor simulation experiments, and ground penetrating radar measurements [26][27][28][29][30]. However, since the morphological characteristics of the sedimentary facies architecture in the underground could not be observed directly, the core analysis, logging data interpretation, comparison of the small layers of the well profile-combined with the analysis of the prediction results of seismic data-were used to indirectly judge the architectural features of the sedimentary body [31,32].…”

Section: Methodsmentioning

confidence: 99%

Carbonate Platform Reef-Shoal Reservoir Architecture Study and Characteristic Evaluation: A Case of S Field in Turkmenistan

Wang

Zhou

et al. 2021

Energies

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Carbonate sediments are susceptible to many factors, such as paleostructure, diagenesis, and strong microbial alteration; as such, their sedimentary architecture still calls for further research. In this study, the reef and shoal bodies in the XVm and XVp layers of the Middle–Upper Jurassic Karlov-Oxfordian in the S gas field were used as the object, and the architecture of the reef-shoal facies was studied. Based on the idea of “vertical grading and horizontal boundary”, the interface characteristics of the 6th to 4th levels of reef-shoal bodies in the study area were summarized, as were four ways to determine the boundaries of reef-shoal bodies. Based on the dense well network, we quantitatively described the scale of each small layer of single reef shoal body through the point-line-surface method and established a geological database of the reef shoal bodies in the study area. In addition, we established the width and thickness of the reef shoal body and the empirical formula for relationships. The study of morphological characteristics of reef-shoal bodies and the degree of overlap revealed six architecture models of reef-shoal bodies. The vertical and lateral superimposed reefs were obtained by evaluating the reservoir space, pore throat characteristics, and physical property characteristics corresponding to various architecture models. The vertical and lateral superimposed shoals corresponded to large reservoir thicknesses. The petrophysical properties were good, and we concluded that the reef-shoal superimposed area was a sweet spot for reservoir development. We applied the research results of reef-shoal architecture reservoir characteristics to gas field development, and therefore improved well pattern deployment in the reef-shoal superimposed area. By comparing the test results of newly deployed horizontal wells with adjacent vertical wells, we confirmed that the selection of horizontal wells was better for gas field development. This study on the architecture of reef-shoal facies could guide the study of carbonate rock architecture.

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Section: Methodsmentioning

confidence: 99%

Carbonate Platform Reef-Shoal Reservoir Architecture Study and Characteristic Evaluation: A Case of S Field in Turkmenistan

Wang

Zhou

et al. 2021

Energies

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“…The location of the Halfaya oil field is shown in Fig. 2 [28]. It has a proven reserve of 4.1 billion barrels and a production potential of 200,000-535,000 barrels per day.…”

Section:  Area Of the Case Studymentioning

confidence: 99%

“…Generally, Mishrif is one of the main Cretaceous reservoirs in the Mesopotamian Basin and Middle East [29,30]. The Mishrif Formation, which is the primary producing zone in the Halfaya Oilfield, is approximately 400 meters thick and is characterized by the development of grain shoal reservoirs [28,31]. These reservoirs can be further divided into 15 sublayers [31].…”

Section:  Area Of the Case Studymentioning

confidence: 99%

“…The Mishrif reservoir primarily consists of rudstone, grainstone, and packstone, with well-developed intergranular and dissolved pores, contributing to its porosity [31]. The formation is connected to the Arabian shield in the south and has a regional structural location adjacent to subbasin deepwater facies in the southwest [28]. The geological features and reservoir architecture of the Mishrif Formation in the Halfaya Oilfield provide valuable insights for the development of similar reservoirs in the Middle East.…”

Section:  Area Of the Case Studymentioning

confidence: 99%

“…The thickness of the Mishrif Formation ranges from 350 to 400 meters. Understanding the characteristics and properties of the Mishrif Formation is crucial for effective reservoir engineering and production optimization in the Halfaya Oilfield [28,32].…”

Section:  Area Of the Case Studymentioning

confidence: 99%

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Optimization of Gas Lifting Design in Mishrif Formation of Halfaya Oil Field

Ahmed,

Sadeq,

Ben Mahmud

2023

IJCPE

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The optimization of artificial gas lift techniques plays a crucial role in the advancement of oil field development. This study focuses on investigating the impact of gas lift design and optimization on production outcomes within the Mishrif formation of the Halfaya oil field. A comprehensive production network nodal analysis model was formulated using a PIPESIM Optimizer-based Genetic Algorithm and meticulously calibrated utilizing field-collected data from a network comprising seven wells. This well group encompasses three directional wells currently employing gas lift and four naturally producing vertical wells. To augment productivity and optimize network performance, a novel gas lift design strategy was proposed. The optimization of gas allocation was executed to maximize oil production rates while minimizing the injected gas volume, thus achieving optimal oil production levels at the most effective gas injection volume for the designated network. The utilization of the PIPESIM Optimizer, founded on genetic algorithm principles, facilitated the attainment of these optimal parameters. The culmination of this study yielded an optimal oil production rate of 18,814 STB/d, accompanied by a gas lift injection rate of 7.56 MMscf/d. This research underscores the significance of strategic gas lift design and optimization in enhancing oil recovery and operational efficiency in complex reservoir systems like the Mishrif formation within the Halfaya oil field.

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Sedimentary Types, Characteristics and Genesis of Carbonate Platform Tidal Channel in M Formation of a Oilfield in the Middle East

Yu,

Shen,

et al. 2024

Springer Series in Geomechanics and Geoengineering

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Sedimentary and reservoir architectures of MB1-2 sub-member of Middle Cretaceous Mishrif Formation of Halfaya Oilfield in Iraq

Cited by 24 publications

References 21 publications

Carbonate Platform Reef-Shoal Reservoir Architecture Study and Characteristic Evaluation: A Case of S Field in Turkmenistan

Carbonate Platform Reef-Shoal Reservoir Architecture Study and Characteristic Evaluation: A Case of S Field in Turkmenistan

Optimization of Gas Lifting Design in Mishrif Formation of Halfaya Oil Field

Sedimentary Types, Characteristics and Genesis of Carbonate Platform Tidal Channel in M Formation of a Oilfield in the Middle East

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