Role played by clay content in controlling reservoir quality of submarine fan system, Forties Sandstone Member, Central Graben, North Sea

Bello, Abdulwahab Muhammad; Jones, Stuart J.; Gluyas, Jon; Açıkalın, Sanem; Cartigny, Matthieu

doi:10.1016/j.marpetgeo.2021.105058

Cited by 45 publications

(18 citation statements)

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“…Consequently, since the results of the experiments have shown that precursor detrital chlorite is essential for the continuous growth of diagenetic chlorite with increasing temperature, it is important to identify the depositional environments and processes in deep-water sandstones that could potentially lead to the formation and occurrence of diagenetic clay coats in ancient turbidite reservoirs (Bello et al, 2021). For instance, detrital clay coats in deep-water turbidites are reported to have been inherited from continental, transitional, and shallow marine/shelf environments before being transported to deep-water settings (Bahlis and de Ros, 2013;Yezerski and Shumaker, 2018;Bello et al, 2021). Thus, although such inherited coats might be susceptible to abrasion during transport, submarine channels, which are close to shelf, could potentially have remnant detrital clay coats that might recrystallize to form continuous, diagenetic coats during burial diagenesis, thereby preserving reservoir quality.…”

Section: Implications For Reservoir Quality Prediction In Ancient Tur...mentioning

confidence: 99%

“…Additionally, in ancient sandstones, the role played by detrital clay coatings in the formation of authigenic clay coatings cannot be accurately established due to their partial or complete transformation during burial diagenesis. For example, in the Palaeocene Forties Sandstone Member, Central North Sea, Bello et al (2021) reported that it was challenging to determine the extent of transformation as well as the amount or volume of precursor detrital clay coats required to form complete authigenic coats that prevent the development of quartz overgrowths. This is because thermally-driven alteration of precursor, detrital smectite clay to form chlorite, illite, and mixed layer-illite smectite has occurred in the sandstones (Shaw and Conybeare, 2003;Bello et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…For example, in the Palaeocene Forties Sandstone Member, Central North Sea, Bello et al (2021) reported that it was challenging to determine the extent of transformation as well as the amount or volume of precursor detrital clay coats required to form complete authigenic coats that prevent the development of quartz overgrowths. This is because thermally-driven alteration of precursor, detrital smectite clay to form chlorite, illite, and mixed layer-illite smectite has occurred in the sandstones (Shaw and Conybeare, 2003;Bello et al, 2021). Thus, establishing the extent of coverage of detrital clay coats required to inhibit the development of quartz and feldspar cements is important for improving reservoir quality prediction (Bloch et al, 2002;Taylor et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Experimental diagenesis using present-day submarine turbidite sands

et al. 2022

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Hydrothermal-reactor experiments were conducted to investigate the potential formation of chlorite and microquartz grain coatings on detrital quartz and feldspar grains, and to understand their role in inhibiting the formation of quartz and feldspar (albite) overgrowths. Modern-day proximal and distal unconsolidated sediment from the Bute Inlet (British Columbia, Canada) with known amounts of precursor clay content, were used as starting material. The samples were heated to 250°C at water vapour pressure in a hydrothermal reactor for 72 h. The experiments were performed with and without a silica supersaturated Na2CO3 (0.1 M) solution. Detailed microscopy and EDS mapping analysis identified that the main chlorite precursor, crucial for the formation of the synthesized grain coatings, was a Mg-rich chlorite. The experimental results showed that where the volume of precursor chlorite was low (i.e., 0.1%), notably in the proximal channel Bute samples, chlorite coatings were poorly developed, with a clay volume and maximum chlorite-coating coverage of 0.5% and 47%, respectively. In contrast, with an initial precursor chlorite volume of 14.5%, the distal lobe Bute sample has generated chlorite volume ranging from 42.9% to 56.3% post-experiment, with a maximum chlorite-coating coverage of 77%. The chlorite and microquartz coatings formed in the study are morphologically similar to those seen in natural sandstone reservoirs, and they have restricted the development of quartz and albite cementation in the reactor experiments. The findings provide quantitative data that can be utilised to describe diagenetic changes in mesodiagenetic environments.

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Section: Implications For Reservoir Quality Prediction In Ancient Tur...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental diagenesis using present-day submarine turbidite sands

et al. 2022

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“…The sand-carrying fluid is injected into the formation after the fore-fluid has opened the formation. It carries the proppant into the fractures, thereby increasing the conductivity of oil and gas (Bhatti et al, 2020;Bello et al, 2021;Guo et al, 2021). Then, the amount of sand-carrying fluid is also crucial to the fracturing effect.…”

Section: Engineering Factors and Fracturing Effectsmentioning

confidence: 99%

Simulation of Fracturing and Well Pattern Optimization of Fractured Tight Sandstone Reservoirs

et al. 2022

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The fracturing and well pattern optimization of fractured reservoirs is a hot spot in petroleum engineering. In this study, taking the tight oil reservoirs of the Yanchang Formation in the Ordos Basin as an example, an optimized plan of hydraulic fracturing and well pattern deployment of the fractured tight reservoir were systematically studied using a fluid-solid coupling model. The results show that the Chang 6 Member of Yanchang Formation mainly develop feldspar sandstone. A large number of vertical fractures are developed in Chang 6 Member, and they have significant shearing properties. The target sandstone reservoir is in the mid-diagenetic A stage. Natural fractures have a significant effect on the extension of hydraulic fractures. When the fracturing direction is parallel to the main strike of natural fractures, the extension distance of the hydraulic fractures is long and the fracturing scale is large; however, when the fracturing direction is orthogonal or oblique to the main strike of natural fractures, the extension distance of the hydraulic fractures is limited. Statistics show that the average length of hydraulic fractures when fracturing parallel to natural fractures is 1.3 times of that when fracturing perpendicular to natural fractures. In addition, after optimization of fracturing parameters, we found that the displacement should be controlled at 2–3 cubic meters/min, and the sand ratio should be controlled at 25%. The smaller the horizontal minimum principal stress difference between the fracturing layer and the shielding layer, the lower the elastic modulus, and the easier it is to control the fracture height. Microseismic monitoring results show that the half-fracture length and fracture height are mainly distributed in 80–140 m and 15–25 m, respectively. The optimized fracture half-length was 120 m and the half-fracture height was 20 m. Finally, the well pattern of the target layer is optimized considering natural fractures. Through this study, we found that the reverse five-spot well pattern is suitable for the efficient development of tight oil reservoirs of the Chang 6 Member in this area.

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“…In recent years, the research focus of clastic oil and gas reservoirs has gradually developed from conventional to unconventional reservoirs such as tight reservoirs, deep reservoirs or volcanic rock reservoirs (Kassem et al, 2021;Lv and Li, 2021;Boutaleb et al, 2022;Cui and Radwan., 2022). The different scales of reservoir heterogeneity, the reasons for the formation of tight oil and gas reservoirs, the origin of various secondary pores, and the division of reservoir types have all become the focus of reservoir geology (Li et al, 2013;Haile et al, 2018;Qiao et al, 2019;Wu et al, 2019;Bello et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Comprehensive evaluation and reservoir classification in the Quan 3 Member of the Cretaceous Quantou Formation in the Fuxin Uplift, Songliao Basin

Zhang

Wang

et al. 2022

Front. Earth Sci.

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Continental tight oil sandstone reservoirs are developed in the Cretaceous Quentou Formation in the Songliao Basin, China. At present, there is still a lack of research on the reservoir microstructures, reservoir physical properties, and the division scheme of reservoir types in the Quan 3 Member of the Quanzhou Formation. Therefore, in this paper, taking the Quan 3 Member in the Fuxin Uplift Belt of the Songliao Basin as an example, the microscopic pore structure characteristics of tight oil sandstones have been systematically studied, and the classification standard of tight sandstones has been formulated. Furthermore, the sweet spots of the main production layers are predicted. The results show that the I sandstone group in the Quan 3 Member in the study area belongs to shallow water delta facies. Feldspar lithic fine sandstones are developed in the target layer, and calcareous sandstone is locally developed. Moreover, the mian pore types of the target layer include dissolved intergranular and intragranular pores, followed by primary intergranular pores, while micro-fractures are occasionally seen. According to the mercury intrusion test results, the pore-throat structures of the reservoir in the Quan 3 Member are divided into four types: 1) small-pore medium-throat type (point bar and delta distributary channel), 2) small-pore micro-throat type (point bar), 3) small-pore micro-throat type (natural levee), 4) micro-pore micro-throat type (river floodplain and inter-tributary bay). The lower limits of the physical properties of the effective reservoirs in the Quan 3 Member has been determined: the porosity is 10% and the permeability is 0.1 mD. Finally, combined with the study of the mercury intrusion curves, the physical properties and the sedimentary facies, the classification standard of the Quan 3 Member reservoirs was formulated. For the I sandstone group, the sweet spots of the Type I reservoirs are mainly developed in the Fuyu Oilfield in the southeast areas. The sandstones in this area suffered less compaction, and primary and secondary pores suffered from late dissolution are mainly developed.

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Role played by clay content in controlling reservoir quality of submarine fan system, Forties Sandstone Member, Central Graben, North Sea

Cited by 45 publications

References 78 publications

Experimental diagenesis using present-day submarine turbidite sands

Experimental diagenesis using present-day submarine turbidite sands

Simulation of Fracturing and Well Pattern Optimization of Fractured Tight Sandstone Reservoirs

Comprehensive evaluation and reservoir classification in the Quan 3 Member of the Cretaceous Quantou Formation in the Fuxin Uplift, Songliao Basin

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