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地应力剖面的研制为测井资料开辟了新的应用领域。通过对川西XL气田 4口井的地应力剖面分析 ,川西XL气田沙溪庙组储层岩石力学参数、三向主应力、水平应力场方向、工程常用压力及出砂指数有如下特征 :孔隙、裂缝的发育程度能够对储层的力学性质产生影响 ;三向主应力一般满足关系式 :σH>σV>σh,裂隙发育的层位水平主应力、破裂压力较围岩低 ,坍塌压力较围岩高 ;水平主应力方向与川西区域构造水平主应力方向基本一致 ,但个别层位主应力方向发生了较大变化 ;出砂指数值较高 ,基本不存在出砂现象。
The development of geostress profile opens up new application fields for logging data. Based on the analysis of the stress field profile of 4 wells in the west Sichuan gas field, the rock mechanics parameters, three-direction principal stress and horizontal stress field direction of the Shaximiao Formation in the western Sichuan gas field have the following characteristics: pore, Fracture development degree can affect the mechanical properties of the reservoir. The three-direction principal stress generally satisfies the relation: σH> σV> σh. The main horizontal stress and fracture pressure of the fractured layer are lower than the surrounding rock and the collapse pressure is lower than that of the surrounding rock High; the direction of the horizontal principal stress is basically the same as the principal stress direction of the tectonic level in the western Sichuan area, but the direction of the principal stress of individual layers is greatly changed; the index of sand production is relatively high with no sanding phenomenon.