In situ stress variations associated with regional changes in tectonic setting, northeastern Brooks Range and eastern North Slope of Alaska

Dixit, N. C.; Hanks, Catherine L.; Wallace, Wesley K.; Ahmadi, Mohabbat; Awoleke, Obadare O.

doi:10.1306/08051616013

Cited by 14 publications

(9 citation statements)

References 29 publications

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“…The calculation of in situ stress magnitude supports petroleum engineers' decisions about well design, wellbore stability and fracture stimulation (Zoback et al, 2003;Ju and Wang, 2018;Iqbal et al, 2018;Lai et al, 2019). The three mutually orthogonal principal stresses include (1) vertical (overburden) stress (Sv), (2) maximum horizontal stress (SHmax), and (3) minimum horizontal stress (Shmin) (Zoback et al, 2003;Verweij et al, 2016;Dixit et al, 2017;Lai et al, 2019).…”

Section: In Situ Stress Magnitudesmentioning

confidence: 99%

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Structural diagenesis in ultra-deep tight sandstones in Kuqa depression, Tarim Basin, China

Lai

Liu

et al. 2021

Preprint

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Abstract. The Lower Cretaceous Bashijiqike Formation of Kuqa depression is ultra-deeply buried sandstone in fold-and-thrust belts. Few researches link diagenetic processes with structure. To fill this gap, a comprehensive analysis integrating diagenesis with structure pattern, fracture and in situ stress is performed following a structural diagenetic approach. The results show that the pore spaces include residual intergranular pores, intergranular and intragranular dissolution pores, and micro-fractures. The sandstones experienced a high degree of mechanical compaction, and compaction is limited in well-sorted rocks or abundant in rigid quartz grains. The most volumetrically important diagenetic minerals are calcites. The framework grains experienced a varied degree of dissolution, and intergranular and intragranular dissolution pores are formed. Special aims are paid on the dissolution associated with the fracture planes. Most natural fractures are cemented by carbonate cements, which limit fluid flow. In addition, presences of fracture enhance dissolution, and the fracture planes are enlarged by dissolution. Cementation and dissolution can occur simultaneously in fracture surfaces, and the enlarged fracture surfaces can be cemented by late-stage cements. The in situ stress magnitudes are calculated using well logs. The horizontal stress difference (Δσ) determines the degree of mechanical compaction, and rocks associated with low Δσ experienced a low degree of compaction, and there contain preserved intergranular pores. Natural fractures are mainly related to the low Δσ layers. The presences of intergranular and intragranular dissolution pores are mainly associated with the fractured zones. The high quality reservoirs with intergranular pores or fractures are related to low Δσ layers. The structural diagenesis researches above help the prediction of reservoir quality in ultra-deep sandstones, and reduce the uncertainty in deep natural gas exploration in Kuqa depression.

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Section: In Situ Stress Magnitudesmentioning

confidence: 99%

“…Pore pressure (Pp), also is known as formation pressure at a certain depth (Dixit et al, 2017), can be calculated from sonic well logs using Eaton's method (Eaton, 1969;Tingay et al, 2009). 0 0 ( )( / ) c p w n…”

Section: In Situ Stress Magnitudesmentioning

confidence: 99%

Structural diagenesis in ultra-deep tight sandstones in Kuqa depression, Tarim Basin, China

Lai

Liu

et al. 2021

Preprint

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Section: In Situ Stress Magnitudesmentioning

confidence: 99%

Comment on se-2021-85

Maerz¹

2021

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“…Under natural conditions, the flow of fluids in porous structures is connected with the movement of gases and liquids in geological deposits [1]. These deposits, as primary reservoirs, are areas of migration [2][3][4][5][6][7][8][9][10][11][12][13][14][15] of such substances as crude oil or natural gas, but also of the movement of other liquids and gases, such as water brine or methane in rock masses of hard coal. In each of these cases, recognizing conditions of the flow of gasses by porous deposits can, to a considerable degree, contribute to better understanding mechanisms of the flow and the migration of gasses in the given rock deposit, which can also correlate with more effectively getting gas out of natural geological deposits.…”

Section: Introductionmentioning

confidence: 99%

Model of Flow Resistance Coefficient for a Fragment of a Porous Material Deposit with Skeletal Structure

Wałowski

2021

Energies

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The hydrodynamic conditions resulting from the permeability of porous materials are based not only on the assessment of the gas flow through these materials, but also the losses related to the pressure energy in this flow. Flow resistance is a direct measure of this loss. The aim of this experimental research was to evaluate the flow resistance of the porous material in relation to the gas flow. The research was carried out on a material with a slit-porous structure. The tests were carried out on a system for measuring gas permeability under the conditions of gas bubbling through the char. The issue of the total pressure drop process in the porous bed was considered in the Reynolds number category. The coefficient of flow resistance for the char was determined and the value of this coefficient was compared with the gas stream, and an experimental evaluation of the total pressure drop on the porous bed was made. The novelty of this article is the determination of the tortuosity and the gas permeability coefficient for a solid of any shape—a rigid skeleton.

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In situ stress variations associated with regional changes in tectonic setting, northeastern Brooks Range and eastern North Slope of Alaska

Cited by 14 publications

References 29 publications

Structural diagenesis in ultra-deep tight sandstones in Kuqa depression, Tarim Basin, China

Structural diagenesis in ultra-deep tight sandstones in Kuqa depression, Tarim Basin, China

Comment on se-2021-85

Model of Flow Resistance Coefficient for a Fragment of a Porous Material Deposit with Skeletal Structure

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