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中文摘要：
川西须家河组2段气藏属于低渗低孔致密深层气藏，地层压力和破裂压力高。破裂压力影响因素虽然十分复杂，但岩石力学特征作为其中一种直接影响因素，也是十分重要的。通过实验室常规岩石密度孔隙度测定、三轴强度试验和钻井液对岩石变形和破裂特性影响等破裂模拟试验数据，得知须2段岩石抗压强度、弹性模量和泊松比都比较大，岩石经钻井液浸泡后，塑性有所增加，直接使水平应力增大，从而增大了破裂压力值。破裂试验结果对研究区储层压裂改造具有重要的指导意义。
英文摘要：
Gas reservoir in Xujiahe Section 2 in west Sichuan are low porosity, low permeability, deep, high formation pore and fracture pressure, etc. Factors affecting formation fracture pressure are complicated, but rock mechanics is very important. Through measurement of conventional rock density, porosity, three-axial strength, and effects of drilling fluids on rock deformation and fracturing, it suggests that rock samples＇ compressive strength, elastic modulus, and Poisson ratio are relatively high. The fracture pressure is increased after being soaked in drilling fluids due to increased Mastic and corresponding horizontal stress. Fracturing tests provide guidance to reservoir hydraulic fracturing.
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