Sandstones and Sandstone Reservoirs

Bjørlykke, Knut; Jahren, Jens

doi:10.1007/978-3-642-02332-3_4

Cited by 44 publications

(41 citation statements)

References 43 publications

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“…First and foremost, understanding how these sedimentary facies packages or stacking patterns formed in a stratigraphic record is essential. are mainly dictated by mechanical compaction, however early carbonate cementation may cause total or partial porosity loss leading to lithification of siliciclastic sediments (Bjørlykke, 2014;Bjørlykke and Jahren, 2015). The depth could be less/greater than suggested here because it is temperature controlled and thus depends on the geothermal gradient and burial history (Bjørlykke and Høeg, 1997).…”

Section: Scientific Backgroundmentioning

confidence: 76%

Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces

Haile

Hellevang

Aagaard

et al. 2015

Marine and Petroleum Geology

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Section: Scientific Backgroundmentioning

confidence: 76%

Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces

Haile

Hellevang

Aagaard

et al. 2015

Marine and Petroleum Geology

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“…The most important reservoir properties are porosity and permeability, but pore geometry and wetting properties of the mineral surfaces may also influence petroleum production. Sandstones provide reservoirs for oil and gas, but also for groundwater which is a fluid that is becoming increasingly valuable (Bjørlykke & Jahren, 2010).…”

Section: Introductionmentioning

confidence: 99%

Study of Low-Salinity Waterflooding for Sandstone Reservoir

Cesarian

2019

indones. j. integr. sci. educ.

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Recent studies showed that salinity concentration of the injected water is more important factor rather than the amount of water injected. The objectives of this study are to analyse the effect of salinity and its behaviour in waterflooding and calculating the recovery factor of the oil produced in sandtone reservoir condition. This study focuses on analysing the effect of salinity to its recovery factor, relative permeability, breakthrough time and water cut of the oil-water system. Laboratory experiment had been carried out to determine the recovery factor by using sandstone core with the dimension length and diameter of 3 in and 1.5 in, respectively. Sodium Chloride (NaCl) was used to control the salinity concentration in waterflooding with range of 1,000 ppm to 14,000 ppm. The experiment was run with constant flow rate, pressure and temperature. In this experiment, deionized water with varied salinity and paraffin oil were used to perform the waterflooding procedure. Based on the results obtained, the highest total oil recovery by waterflooding was 57.8% with 4,000 ppm as the optimum salinity, which is 14.6% higher than oil recovered by 14,000 ppm. The results also showed the change in end-point value of relative permeability. It also showed that water cut tend to increase as the salinity increase, while breakthrough time tend to decrease as the salinity increase. AbstrakStudi terbaru menunjukkan bahwa konsentrasi salinitas air yang disuntikkan adalah faktor yang lebih penting daripada jumlah air yang disuntikkan. Tujuan dari studi ini adalah untuk menganalisis pengaruh salinitas dan perilakunya dalam waterflooding dan menghitung faktor pemulihan minyak yang dihasilkan dalam kondisi batu pasir reservoir. studi ini berfokus pada analisis pengaruh salinitas terhadap faktor pemulihannya, permeabilitas relatif, waktu terobosan dan potongan air dari sistem minyak-air. Eksperimen laboratorium telah dilakukan untuk menentukan faktor pemulihan dengan menggunakan inti batupasir dengan panjang dimensi 3 in dan diameter 1,5 in. Natrium Klorida (NaCl) digunakan untuk mengontrol konsentrasi salinitas dalam waterflooding dengan kisaran 1.000 ppm hingga 14.000 ppm. Eksperimen dilakukan dengan laju aliran, tekanan dan suhu yang konstan. Dalam eksperimen ini, air terdeionisasi dengan salinitas bervariasi dan minyak parafin digunakan untuk melakukan prosedur waterflooding. Berdasarkan hasil yang diperoleh, total perolehan minyak tertinggi dengan waterflooding adalah 57,8% dengan 4.000 ppm sebagai salinitas optimal, yang mana 14,6% lebih tinggi daripada minyak yang dipulihkan oleh 14.000 ppm. Hasil juga menunjukkan perubahan nilai titik akhir permeabilitas relatif. Eksperimen ini juga menunjukkan bahwa potongan air cenderung meningkat dengan meningkatnya salinitas, sementara waktu terobosan cenderung menurun dengan meningkatnya salinitas.

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“…Therefore, petrophysical properties such as porosity and permeability serve as important indicators for the assessment of the reservoir quality (Ajdukiewicz & Lander, 2010;Amthor & Okkerman, 1998;dos Anjos et al, 2000;Dutton et al, 2012;Taylor et al, 2015). In deeply buried sandstones where extensive quartz cementation occurs, the formation fluids are mostly supersaturated with silica (Bjorlykke & Egeberg, 1993;Bjørlykke & Jahren, 2015;Thiry & Maréchal, 2001) and thermal conditions favor precipitation on substrate grains (Lander et al, 2008;Walderhaug, 1994a). Thermal exposure characterizes the time spent at elevated temperatures (>75 ∘ ) that primarily favors syntaxial overgrowth cementation (Walderhaug, 1994b).…”

Section: Introductionmentioning

confidence: 99%

“…Sandstone being the most significant reservoir rock-type accounts for over 50% of the world petroleum reservoirs (Bjørlykke & Jahren, 2015). Therefore, diagenetic quartz cementation and its impact on porosity and permeability of sandstone has been a topic of intensive research since several decades.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the microstructural properties and dynamic relations are different in 3-D when compared to 2-D. Further, the shortcomings become highly evident in the estimation of permeability in porous rocks that requires information of flow pathways in full 3-D space. Computed microtomography and digital geometry processing (e.g., Auzerais et al, 1996;Blunt et al, 2013;Deng et al, 2015;Spanne et al, 1994) for numerically reconstructing 3-D pore geometries from the thin section of rock samples can only be utilized to estimate the transport properties in specific core samples. On the other hand, process-based approaches (Bosl et al, 1998;Øren & Bakke, 2002) that explicitly modeled diagenetic cementation and analyzed its implications on the evolution of permeability do not take into account the microscopic changes that occur due to anisotropic growth of cements leading to faceted crystal morphologies.…”

Section: Introductionmentioning

confidence: 99%

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Three‐Dimensional Phase‐Field Investigation of Pore Space Cementation and Permeability in Quartz Sandstone

et al. 2018

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The present work investigates the dynamics of quartz precipitation from supersaturated formation fluids in granular media, analogous to sandstones, using a multiphase‐field model. First, we derive a two‐dimensional (2‐D) Wulff shape of quartz from the three‐dimensional (3‐D) geometry and simulate the unitaxial growth of quartz in geological fractures in 2‐D in order to examine the role of misorientation and crystal c to a axis ratios (c/a) in the formation of quartz bridge structures that are extensively observed in nature. Based on this sensitivity analysis and the previously reported experiments, we choose a realistic value of c/a to computationally mimic the 3‐D anisotropic sealing of pore space in sandstone. The simulated microstructures exhibit similarities related to crystal morphologies and remaining pore space with those observed in natural samples. Further, the phase‐field simulations successfully capture the effect of grain size on (I) development of euhedral form and (II) sealing kinetics of cementation, consistent with experiments. Moreover, the initially imposed normal distribution of pore sizes evolves eventually to a lognormal pattern exhibiting a bimodal behavior in the intermediate stages. Furthermore, computational fluid dynamics analysis is performed in order to derive the temporal evolution of permeability in numerically cemented microstructures. The obtained permeability‐porosity relationships are coherent with previous findings. Finally, we highlight the capabilities of the present modeling approach in simulating 3‐D reactive flow during progressive sealing in porous rocks based on innovative postprocessing analyses and advanced visualization techniques.

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Sandstones and Sandstone Reservoirs

Cited by 44 publications

References 43 publications

Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces

Experimental nucleation and growth of smectite and chlorite coatings on clean feldspar and quartz grain surfaces

Study of Low-Salinity Waterflooding for Sandstone Reservoir

Three‐Dimensional Phase‐Field Investigation of Pore Space Cementation and Permeability in Quartz Sandstone

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