吉木萨尔二叠系致密油岩石力学特性参数分析与压裂对策

Rock Mechanical Parameters Analysis of Permian Tight Formations at Jimusaer in Xinjiang and the Related Measures for Fracturing

致密油岩石力学特性是影响压裂裂缝形态和压后效果的重要影响因素,围绕吉木萨尔二叠系致密油压裂水平井裂缝缝网是否形成,缝高是否受限等问题,开展了三轴应力实验与岩石力学特性参数分析,同时结合微地震裂缝监测,从高力学强度层、岩石脆性、两向应力差、天然裂缝发育等方面分析了裂缝扩张形态及影响因素,在此基础上,进一步提出了针对性的致密油压裂对策。

Rock mechanical properties of tight formations are important factors in determining crack patterns and effect after fracturing. The formation of horizontal well facture networks and the limitation of fracture height during Permian tight formations fracturing at Jimusaer were mainly focus on. Triaxial stress test was used to analyze the characteristics of rock mechanical parameters,combined with microseismic fracture monitoring method. According to these two analysis methods,this paper developed comprehensive analyses on fracture extending patterns and its influencial factors from several aspects,such as studies on layers with high mechanical strength,rock brittleness,stress difference,natural fracture developments and so on. On these basis,targeted measures for tight formation fracturing have been put forward further.