Analysis of the reservoir electrofacies in the framework of hydraulic flow units in the Whicher Range Field, Perth Basin, Western Australia

Kadkhodaie-Ilkhchi, Rahim; Rezaee, Reza; Moussavi‐Harami, Reza; Kadkhodaie, Ali

doi:10.1016/j.petrol.2013.10.014

Cited by 61 publications

(15 citation statements)

References 27 publications

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“…On the other hand, there is an increase of porous reservoir zones towards the Whicher Range wells 1 and 4. This is consistent with the results from production tests and the results from previous studies mentioning high production and most promising sandstone zones in these wells (Kadkhodaie-Ilkhchi et al, 2013). It is worth mentioning that the uncertainty is associated with the result of this study results is not inventible.…”

Section: Resultssupporting

confidence: 93%

Seismic inversion and attributes analysis for porosity evaluation of the tight gas sandstones of the Whicher Range field in the Perth Basin, Western Australia

Kadkhodaie-Ilkhchi

Moussavi‐Harami

Rezaee

et al. 2014

Journal of Natural Gas Science and Engineering

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Section: Resultssupporting

confidence: 93%

Seismic inversion and attributes analysis for porosity evaluation of the tight gas sandstones of the Whicher Range field in the Perth Basin, Western Australia

Kadkhodaie-Ilkhchi

Moussavi‐Harami

Rezaee

et al. 2014

Journal of Natural Gas Science and Engineering

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“…The concept of the hydraulic flow unit was initially proposed from the Kozeny-Carmen equation of a capillary tube model for rock pore spaces, with a key parameter in the method as the reservoir quality index (RQI), which is the average hydraulic radius in a rock 45 – 48 . The input parameters for reservoir quality index (RQI) and flow Zone indicator (FZI) are core porosity (Phi) and permeability (K) data that present the relationship below: …”

Section: Resultsmentioning

confidence: 99%

Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

Opuwari

Afolayan

Mohammed

et al. 2022

Sci Rep

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This study aims to generate rock units based on core permeability and porosity of OW oilfield in the Bredasdorp Basin offshore South Africa. In this study, we identified and classified lithofacies based on sedimentology reports in conjunction with well logs. Lucia's petrophysical classification method is used to classify rocks into three classes. Results revealed three lithofacies as A (sandstone, coarse to medium-grained), B (fine to medium-grained sandstone), and C (carbonaceous claystone, finely laminated with siltstone). Lithofacies A is the best reservoir quality and corresponds to class 1, while lithofacies B and C correspond to class 2 and 3, which are good and poor reservoir quality rock, respectively. An integrated reservoir zonation for the rocks is based on four different zonation methods (Flow Zone indicator (FZI), Winland r35, Hydraulic conductivity (HC), and Stratigraphy modified Lorenz plot (SMLP)). Four flow zones Reservoir rock types (RRTs) were identified as RRT1, RRT3, RRT4, and RRT5, respectively. The RRT5 is the best reservoir quality composed of a megaporous rock unit, with an average FZI value between 5 and 10 µm, and HC from 40 to 120 mD/v3, ranked as very good. The most prolific flow units (RRT5 and RRT4 zones) form more than 75% of each well's flow capacities are supplied by two flow units (FU1 and FU3). The RRT1 is the most reduced rock quality composed of impervious and nanoporous rock. Quartz is the dominant framework grain, and siderite is the dominant cement that affects flow zones. This study has demonstrated a robust approach to delineate flow units in the OW oilfield. We have developed a useful regional petrophysical reservoir rock flow zonation model for clastic reservoir sediments. This study has produced, for the first time, insights into the petrophysical properties of the OW oilfield from the Bredasdorp Basin South Africa, based on integration of core and mineralogy data. A novel sandstone reservoir zonation classification criteria developed from this study can be applied to other datasets of sandstone reservoirs with confidence.

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“…In this regard, reservoir behavior can be interpreted based on pore system properties controlled by depositional and post-depositional characteristics of the reservoir sandstones. Based on sedimentary rock typing, reservoir units (sand and silt) of Whicher Range sandstones were distinguished from non reservoir units (shale) using clustering of well log data and verification of results with petrographic data [16]. In this study, in order to characterize the reservoir sandstones and to recognize the main factors controlling reservoir quality, reservoir units (sandy and silty intervals) first studied petrophysically in terms of hydraulic flow unit and electrofacies concepts resulted in separation of petrophysical rock types.…”

Section: Petrophysical Characteristics Of Reservoir Sandstonesmentioning

confidence: 99%

An Integrated Rock Typing Approach for Unraveling the Reservoir Heterogeneity of Tight Sands in the Whicher Range Field of Perth Basin, Western Australia

Ilkhchi¹,

Rezaee

Moussavi‐Harami

et al. 2014

OJG

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Tight gas sands in Whicher Range Field of Perth Basin show large heterogeneity in reservoir characteristics and production behavior related to depositional and diagenetic features. Diagenetic events (compaction and cementation) have severely affected the pore system. In order to investigate the petrophysical characteristics, reservoir sandstone facies were correlated with core porosity and permeability and their equivalent well log responses to describe hydraulic flow units and electrofacies, respectively. Thus, very tight, tight, and sub-tight sands were differentiated. To reveal the relationship between pore system properties and depositional and diagenetic characteristics in each sand type, reservoir rock types were extracted. The identified reservoir rock types are in fact a reflection of internal reservoir heterogeneity related to pore system properties. All reservoir rock types are characterized by a compacted fabric and cemented framework. But distribution and dominance of diagenetic products in each of them depend on primary depositional composition and texture. The results show that reservoir rock typing based on three aspects of reservoir sandstones (depositional properties, diagenetic features and petrophysical characteristics) is a suitable technique for depiction of reservoir heterogeneity, recognition of reservoir units and identifying factors controlling reservoir quality of tight sandstones. This methodology can be used for the other tight reservoirs.

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Analysis of the reservoir electrofacies in the framework of hydraulic flow units in the Whicher Range Field, Perth Basin, Western Australia

Cited by 61 publications

References 27 publications

Seismic inversion and attributes analysis for porosity evaluation of the tight gas sandstones of the Whicher Range field in the Perth Basin, Western Australia

Seismic inversion and attributes analysis for porosity evaluation of the tight gas sandstones of the Whicher Range field in the Perth Basin, Western Australia

Petrophysical core-based zonation of OW oilfield in the Bredasdorp Basin South Africa

An Integrated Rock Typing Approach for Unraveling the Reservoir Heterogeneity of Tight Sands in the Whicher Range Field of Perth Basin, Western Australia

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