摘要
传统的地震波理论对于油气的构造勘探做出了重要贡献 ,但目前油气勘探的重点已转向隐蔽性油气藏 ,而储层岩石和岩石孔隙中的流体组成的是含流体孔隙介质 (或双相介质 ) ,有必要发展一套新的理论来指导油气的勘探和开发。以Biot理论和流体喷射流动理论为基础 ,从固液本构方程、流体动力学方程和广义达西定律出发 ,详细地推导出含油水两相流体孔隙介质的地震波传播方程。该方程将固体位移和流体的流动压力与固体的孔隙度和渗透率、流体的密度和饱和度建立起关系 ,通过正演模拟可以了解油气的存在和流体压力变化 ,适当的反演可获得岩石和流体的物性参数 ,这对于油田的勘探和注水油田的开发有重要的理论和实际意义。
Conventional seismic wave theory plays an important role in the exploration of oil and gas structurally. Now that the focus of hydrocarbon exploration has turned to look for subtle reservoirs, it is necessary to develop a set of new theory to guide the exploration and development of oil and gas considering that the reservoir rocks in question are now fluid-bearing media. In this paper, based on theories of Biot and squirt flow of fluids, the author derived the wave equations for seismic waves propagated in oil-and-water-bearing porous media via constitute relation, momentum balance, and generalized Darcy′s law. The equations relate the displacement of solids and flow pressure of fluids with the porosity and permeability of solids as well as the density and saturation of fluids. The hydrocarbon potentials and variations in fluid pressure can be inferred through forward modeling and the petrophysical parameters of rocks and fluids can be obtained via proper inversion method. The results are of great theoretical and practical significance for the exploration of oil and gas as well as the development of water flood fields.
出处
《石油物探》
EI
CSCD
2001年第4期8-13,共6页
Geophysical Prospecting For Petroleum
