Evolution of deformation bands, insights from structural diagenesis

Rodrigues, Ricardo de Souza; Silva, Fernando César Alves da; Córdoba, Valéria Centurion

doi:10.1016/j.jsg.2020.104257

Cited by 8 publications

(5 citation statements)

References 27 publications

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“…Previous studies have individually unraveled the structural evolution, in situ stress, fracture and diagenesis of Bashijiqike Formation in the Kuqa Depression (Jia and Li, 2008;Lai et al, 2017a;Shen et al, 2017;Nian et al, 2018;Ju and Wang, 2018;Lai et al, 2019a). Despite the extensive researches on diagenesis and structure, few researches have been conducted on the structural diagenesis by interacting structure with dia-Structural diagenesis, a cross-disciplinary approach investigating relationships between structures (deformation, fractures, etc) and diagenesis (Laubach et al, 2010), helps us to better understand the changes in reservoir petrophysical properties and subsurface fluid flow (Vandeginste et al, 2012;Matonti et al, 2017;Ferraro et al, 2019;Wu et al, 2019;Rodrigues et al, 2021). Foreland fold-and-thrust belts are challenging for hydrocarbon exploration due to their structural complexity and heterogeneous reservoir quality distribution (Vandeginste et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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

Lai

Dong

et al. 2022

Solid Earth

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Abstract. The Lower Cretaceous Bashijiqike Formation of the Kuqa Depression is made up of ultra-deeply buried sandstones in fold-and-thrust belts. Few researches have linked 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, but 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 attention is paid on the dissolution associated with the fracture planes. Large numbers of natural fractures are cemented by carbonate cements, which limit fluid flow. In addition, the presence of fracture enhances 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 these contain preserved intergranular pores. Natural fractures are mainly related to the low Δσ layers. The presence of intergranular and intragranular dissolution pores is 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 the Kuqa Depression.

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Section: Introductionmentioning

confidence: 99%

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

Lai

Dong

et al. 2022

Solid Earth

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“…a fault that has already lived numerous successive slips during previous geological times. This fault may have been cemented over time without slip, due to rock dissolution or partial melting [ (Walderhaug, 1994), (Di Toro et al, 2009), (Fondriest et al, 2020), (Rodrigues et al, 2021)], or filled with matrix particles (i.e. very thin cohesionless particles) produced by local comminution (Daouadji & Hicher, 2010) or by the introduction of other sediments within the fault gouge [ (Lee & Kim, 2005), (Woodcock & Mort, 2008)].…”

Section: Introductionmentioning

confidence: 99%

Influence of Grain-Scale Properties on Localization Patterns and Slip Weakening within Dense Granular Fault gouges

Casas

Mollon

Daouadji

2022

Preprint

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Fault zones are usually composed of a granular gouge, coming from the wear material of previous slips, which contributes to friction stability. Once considering a mature enough fault zone that has already been sheared, different types of infill materials can be observed, from mineral cementation to matrix particles that can fill remaining pore spaces between clasts and change the rheological and frictional behaviors of the gouge. We aim to understand and reproduce the influence of grain-scale characteristics on slip mechanisms and gouge rheology (Riedel bands) by employing the Discrete Element Method. A 2D-direct shear model is considered with a dense assembly of small polygonal cells of matrix particles. A variation of gouge characteristics such as interparticle friction, gouge shear modulus or the number of particles within the gouge thickness leads to different Riedel shear bands formation and orientation that has been identified as an indicator of a change in slip stability (Byerlee et al., 1978). Interpreting results with slip weakening theory, our simulated gouge materials with high interparticle friction or a high bulk shear modulus, increase the possible occurrence of dynamic slip instabilities (small nucleation length and high breakdown energy). They may give rise to faster earthquake ruptures.

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“…Structural diagenesis, a cross-disciplinary approach investigating relationships between structures (deformation, fractures, etc) and diagenesis (Laubach et al, 2010), helps to better understand the changes in reservoir petrophysical properties and subsurface fluid flow (Vandeginste et al, 2012;Matonti et al, 2017;Ferraro et al, 2019;Wu et al, 2019;Rodrigues et al, 2021). Foreland fold-and-thrust belts are challenging for hydrocarbon exploration due to their structural complexity and heterogeneous reservoir quality distribution (Vandeginste et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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

Lai

Liu

et al. 2021

Preprint

View full text Add to dashboard Cite

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.

show abstract

Evolution of deformation bands, insights from structural diagenesis

Cited by 8 publications

References 27 publications

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

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

Influence of Grain-Scale Properties on Localization Patterns and Slip Weakening within Dense Granular Fault gouges

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

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