【摘要】 在非常规储层的勘探开发历程中,人们逐渐意识到当非常规储层中具有异常高的孔隙流体压力时有利于油气的保存和获得较高的单井产能,为了在非常规储层中寻找高效井、高产井,对孔隙流体压力进行定量的预测是十分有必要的.目前预测孔隙流体压力的方法主要是利用了在异常高压地层中具有低纵波速度的特性,但由于异常高压不是唯一引起纵波速度降低的原因,所以利用现有方法预测孔隙流体压力存在一定的误差.近年来随着地震勘探技术的进步,很多学者利用岩石物理实验证实孔隙流体压力与横波速度之问也有很密切的关系,因此我们从杨氏模量的定义出发结合波动方程推导了有效应力与纵、横波速度以及密度之间的关系,并引入多孔介质中的有效应力定理开发出了一种新的方法来计算非常规储层中的孔隙流体压力.利用该方法在准噶尔盆地低渗透储层的油气勘探中取得了良好的应用效果.更多还原

【Abstract】 In the course of unconventional reservoir exploration and development,people gradually realize that when the unconventional reservoir with abnormal high pore pressure is conducive to the preservation of oil and gas and obtain higher productivity of single well.So it is necessary to make quantitative predictions of pore pressure in order to find efficient wells,and high-yield wells.The existing prediction methods of pore pressure is the main use of the characteristics with low P-wave velocity in abnormal high pressure formation,but because of abnormal high pressure is not the only cause of P-wave velocity decreased,so the use of existing method in the prediction of pore pressure there exist certain errors.In recent years with the development of seismic exploration technology,many scholars using rock physics experiments confirmed that there is a close relationship between pore pressure and S-wave velocity,so we are starting from the definition of Young’ s modulus of the wave equation with the effective stress and the relationship between P-wave velocity,S-wave velocity and density,and introduce effective the porous medium theorem of development should be a new method to calculate pore pressure in reservoir.The method obtains a good application effect in low permeability reservoirs in Junggar basin oil and gas exploration.更多还原