An overview of structures associated with bends of strike-slip faults: Focus on analogue and numerical models

Marine and Petroleum Geology, Journal Year: 2024, Volume and Issue: 167, P. 106983 - 106983

Published: Sept. 1, 2024

Language: Английский

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Quantitative Evaluation of Residual Acid Invasion and Flowback in Fractured-Vuggy Carbonate Reservoirs Using Microfluidics

Energies, Journal Year: 2025, Volume and Issue: 18(5), P. 1162 - 1162

Published: Feb. 27, 2025

Acid fracturing has become a crucial technology for developing carbonate reservoirs, playing particularly significant role in enhancing oil and gas recovery. However, the retention flowback behaviors of residual acid fractured-vuggy reservoirs after remain poorly understood, this uncertainty significantly hinders efficient development such reservoirs. In study, micro-computed tomography images rocks were used to extract actual fracture–vug structures. A microscopic flow model was then designed fabricated using wet etching techniques. Microfluidic experiments performed investigate invasion behavior within these This study introduces novel approach by integrating fracture-vuggy structures from micro-CT into microfluidic model, providing more realistic representation compared previous studies that relied on simplified or idealized geometries. Additionally, coefficient (the ratio invaded area total pore area) rate proportion expelled during flowback) introduced quantitatively assess efficiency under varying rates, viscosities, presence absence surfactants. The results demonstrate increases with injection rate, while decreases as is reduced. higher viscosity phase slower due increased resistance micro model. final lower phase. addition surfactants enhances flowback, increasing up 5% 3%.

Language: Английский

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Research on multi-scale digital core construction of carbonate rock with fractures and caves characteristics: a case study of Dengying formation carbonate rocks in Sichuan Basin

Frontiers in Earth Science, Journal Year: 2025, Volume and Issue: 13

Published: April 17, 2025

Carbonate reservoirs characterized by fractures and caves exhibit a complex spatial distribution significant heterogeneity. The establishment of precise reliable three-dimensional geological models is imperative to elucidate the influence mechanism fracture cave parameters on macroscopic petrophysical properties from micro scale. This foundation prerequisite for efficient development such reservoirs. In this paper, dual-scale CT core scanning data utilized adjust segmentation threshold high-resolution (small-scale) cores low-resolution (large-scale) cores. approach enables comprehensive characterization multi-scale porosity in large-scale realization digital fusion. A 3D model was generated using Slice-GAN neural network SEM images. well-developed extracted used as core. Through superposition, containing constructed. reliability constructed verified based four parameters: aperture distribution, coordination number, porosity, resistivity. research outcomes establish subsequent simulations, which aim assess resistivity response under varied size, angle, size conditions. provides technical advancing fundamental theoretical carbonate rocks.

Language: Английский

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Strike‐slip Fault Architecture and its Control on Fractured Carbonate Reservoirs: Insight from Outcrops in the North‐western Tarim Basin, NW China

Acta Geologica Sinica - English Edition, Journal Year: 2025, Volume and Issue: 99(2), P. 568 - 581

Published: April 1, 2025

Abstract Recent exploration has highlighted the critical role of strike‐slip faults in shaping ultra‐deep carbonate reservoirs Tarim Basin. This study integrates satellite imagery, UAV photogrammetry, outcrop surveys and microscopic analysis to investigate architecture these their impact on reservoir petrophysical properties. The exhibit cores consisting calcite bands, fault breccias fractures, while damage zones are predominantly fractured. Thicker associated with more extensive development. Individual primarily characterized by two sets fractures intersecting at small angles. When systems interact, dominant pattern is main angles one set larger angles, facilitating formation large‐scale reservoirs. We propose a model for core, which consists band breccias. These composed original host rock, cement quartz, poor physical properties, vugs show favorable characteristics. offers valuable insights into development fault‐controlled reservoirs, particularly

Language: Английский

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Segmentation characteristics of strike-slip fault zone and its reservoir control mechanisms in the southwestern Tarim Basin

Frontiers in Earth Science, Journal Year: 2024, Volume and Issue: 12

Published: Sept. 23, 2024

Understanding how fault-related structures influence oil and gas accumulation is crucial for geological investigations exploration planning. This study, based on 3D seismic data, analyzes the northeast-trending strike-slip fault zone in eastern part of Bachu Uplift. Automatic extraction techniques were employed to delineate zone, parallel bedding indicator was used identify reservoirs investigate fault’s segmented features reservoir-controlling characteristics. The results show that primarily governed by simple shear stress conforms Riedel model. Three distinct structural styles developed: vertical, pull-apart, push-up segments, each exhibiting varying profile characteristics planar patterns. segmentation controls distribution Ordovician fault-karst reservoirs. An enrichment model has been established, characterized external hydrocarbon supply, fault-mediated migration, reservoir control, high-elevation accumulation. study offers valuable insights controlled faults.

Language: Английский

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Faulted Karst Reservoir Spaces in Middle-Lower Triassic Carbonates, Qingjiang Region, Yangtze Block, China

Journal of Structural Geology, Journal Year: 2024, Volume and Issue: unknown, P. 105273 - 105273

Published: Oct. 1, 2024

Language: Английский

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