Excavation Damage Zone fracture modelling for seismic tomography: A comparison of explicit fractures and effective medium approaches

Parastatidis, Emmanouil; Hildyard, M.W.; Nowacki, Andy; Flynn, William J.; Suikkanen, Johannes

doi:10.1016/j.ijrmms.2023.105509

Cited by 1 publication

(1 citation statement)

References 25 publications

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“…In the field of geology and rock mechanics, fractures can be classified based on different modes of crack propagation, known as Mode I, Mode II, and Mode III fractures [24,25]. These modes are associated with different types of stress conditions and deformation mechanisms, and they can affect the behavior and stability of rocks differently.…”

Section: Derivation Of Stress-sensitive Formulae For Fractured Carbon...mentioning

confidence: 99%

Study on the Mechanism of Stress Sensitivity Changes in Ultra-Deep Carbonate Reservoirs

Cai,

Jiang,

Liu

2024

Applied Sciences

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Quantitative evaluation of stress sensitivity of ultra-deep carbonate reservoirs has been one of the challenges in exploration and development, and the problem of permeability loss law in ultra-deep carbonates under variable stress conditions has not been solved so far and further research is urgently needed. Through experimental and numerical simulation methods, the stress-sensitive evaluation equations were established based on matrix-type carbonate and fractured carbonate reservoirs, the stress-sensitive changes under different Young’s modulus were discussed, and the degree of permeability loss under different stresses was evaluated. Finally, the dual-media model of ultra-deep carbonate was established, and the practical application was carried out in the Shunbei area of the Tarim Basin. Studies have shown that (1) under the same effective stress, the stress sensitivity of matrix-type and fracture-type carbonate reservoirs is related to the Young’s modulus of the rock skeleton. In matrix-type carbonate reservoirs, rocks with a larger Young’s modulus have smaller rigidity and stronger stress sensitivity. In fracture-type carbonate reservoirs, the stress sensitivity is relatively weak under a smaller Young’s modulus, and relatively strong under a larger Young’s modulus. (2) Measured under the conditions of 87 MPa of peripheral pressure, 50 MPa of flow pressure, and 120 °C, the effective stress of matrix-type carbonate reservoirs has an exponential relationship with the permeability of reservoirs. The degree of stress sensitivity for fracture-type is generally higher than that of matrix-type reservoirs, and the smaller the Young’s modulus, the larger the difference in stress sensitivity. (3) The stress sensitivity of typical ultra-deep carbonates in the Shunbei area of the Tarim Basin is higher by establishing a dual-porosity model based on the initiating pressure gradient, which supports new evidence for the characteristics of ultra-deep carbonates with high-stress sensitivity. In actual production, the impact of stress sensitivity on the reservoir volume calculation and efficient development of ultra-deep carbonate reservoirs requires critical attention.

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Section: Derivation Of Stress-sensitive Formulae For Fractured Carbon...mentioning

confidence: 99%

Study on the Mechanism of Stress Sensitivity Changes in Ultra-Deep Carbonate Reservoirs

Cai,

Jiang,

Liu

2024

Applied Sciences

View full text Add to dashboard Cite

show abstract

Excavation Damage Zone fracture modelling for seismic tomography: A comparison of explicit fractures and effective medium approaches

Cited by 1 publication

References 25 publications

Study on the Mechanism of Stress Sensitivity Changes in Ultra-Deep Carbonate Reservoirs

Study on the Mechanism of Stress Sensitivity Changes in Ultra-Deep Carbonate Reservoirs

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