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碳酸盐岩裂缝性地层破裂压力定量预测目前仍是一道非常复杂的难题。文章应用水力压裂力学原理，紧密结合川南东部地区阳新统碳酸公岩地层特征，探讨了该地区的地层破裂压力机理，认为该区大部分压裂酸化井人工压裂缝是在自然垂缝上延伸扩展，破裂压力近似等于其垂缝延伸压力。在水平挤压应力和扭剪应力作用下，岩体抗张强度主要受地层破碎系数和应力强度指数控制，文章建立了预测地层破裂压力的物理一数学模型，确定岩体视抗张强度，进而对地层破裂压力进行预测。经实际破裂压力资料验证，绝对误差最大５．０ＭＰａ，一般小于３．０ＭＰａ；相对误差最大５．０％，一般小于２．０％。
Quantitative prediction of fracture pressure of fractured carbonate rock is still a very complicated problem. In this paper, based on the principle of hydraulic fracturing mechanics, in combination with the characteristics of the Yanggousong carbonate rock in the eastern part of South Sichuan, the mechanism of formation fracture pressure in this area is discussed. The fracturing acid fracturing in most of the fractured acid fracturing wells in this area is extended on the natural tunnel Expansion, rupture pressure is approximately equal to its vertical seam extension pressure. Under horizontal compressive stress and torsional shear stress, the tensile strength of rock mass is mainly controlled by formation crushing coefficient and stress intensity index. The paper establishes a physical-mathematical model for predicting formation fracture pressure and determines the apparent tensile strength of rock mass. Predict formation pressure. The actual fracture pressure data validation, the absolute maximum error 5.0MPa, generally less than 3.0MPa; relative maximum error of 5.0%, generally less than 2.0%.