陆梁油田头屯河组油藏地应力分析及应用

随着对地应力认识的深入，它在油田勘探开发中的作用日渐明显。应用岩心测试、水力压裂等资料分析了陆梁油田头屯河组油藏的地应力及裂缝特征。水平最大主应力方向为NW，水平最小主应力梯度为0．0121MPa／m，天然的裂缝走向为近似东西向，比较真实地反映了油藏地应力分布状况。在分析地应力、裂缝特征的基础上，简述了裂缝与地应力的关系，并对压裂时地层中裂缝的延伸情况进行分析，同时分析了该油藏地应力、裂缝对油田开发的影响。

In-situ Stress Analysis of Toutunhe Reservoir in Luliang Oilfield and Its Application

In space with in-situ stress knowledge deepen progressively,it attaches incresingly impotance to the role of exploration and development for oil and gas. This paper determines the character of stress and fracture of Toutunhe reservoirs in Luliang oilfield,by testing core and analyzing the data of hydraulic fracture.The direction of horizontal stress is NW,the gradient of stress is abort 0.0121MPa/m,the strike of natural fracture is about EW.It reflects objectively in-situ stress condition for Toutunhe reservoir in Luliang oilfield.On the basis of these,this paper elaborates simply the relation between fracture and in-situ stress,and analyzes the state of fracture propagation under hydrulic fracture,and analyzes the infection that the in-situ stress and the fracture affect development of Toutunhe reservoir in Luliang oilfield.