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本文对川东地区阳一层位地质构造及岩性特性进行了分析。应用围岩稳定性极限平衡，内应力分析，建立井眼周边应力的力学模型，探讨井眼周边破碎区域的应力分布及平衡问题。阐明易垮塌、缩径的力学原因。为钻探阳一层位钻井措施提供参考。
This paper analyzes the geological structure and lithology characteristics of the Yang-1 layer in eastern Sichuan. Applying the limit equilibrium and internal stress analysis of the stability of surrounding rock, the mechanical model of the stress around the wellbore is established to discuss the stress distribution and the balance of the fractured area around the wellbore. Clarify the mechanics of collapse and diameter reduction. Provide a reference for drilling the first layer of drilling measures.