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Quantify the meso-damage evolution of shale during hydration using CT scanning technology to improve wellbore stability assessments during drilling.

April 1, 2014Petroleum Exploration and DevelopmentOpen Access

Study of meso-damage characteristics of shale hydration based on CT scanning technology

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Authors

TMTianshou MaSouthwest Petroleum University PCPing ChenSouthwest Petroleum University

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Implication

Experimental study reveals rapid early-stage meso-damage in hydrated shale samples, indicating that wellbore instability risks escalate immediately upon fluid contact.

Key Points

Quantify the meso-damage evolution of shale during hydration using CT scanning technology to improve wellbore stability assessments during drilling.
Conducted staged CT scanning tests on shale core samples subjected to prolonged hydration soaking.
Analyzed CT image gray-level histograms, applied pseudocolor enhancement for visual clarity, and segmented images to compute the hydration damage variable over time.
Meso-damage evolves most rapidly during the early period of soaking, marked by a shift in the CT gray-level histogram from a unimodal to a bimodal distribution.
Following the rapid initial evolution, the damage variable increases at a continuous, slower rate until macroscopic shale failure occurs.

Cite This Study

Ma et al. (2014) studied this question.

synapsesocial.com/papers/6a7387f86cf7a6ca1f6c3bae https://doi.org/10.1016/s1876-3804(14)60029-x

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Implication

Experimental study reveals rapid early-stage meso-damage in hydrated shale samples, indicating that wellbore instability risks escalate immediately upon fluid contact.

Study of meso-damage characteristics of shale hydration based on CT scanning technology

Discussion

Member takes

Implication

Key Points

Cite This Study

Study of meso-damage characteristics of shale hydration based on CT scanning technology

Discussion

Member takes

Implication

Key Points

Cite This Study

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