Reservoir non-homogeneity and its effect on water injection effect in Guoqi West Area
Guoqi west area currently exists in the development of water injection in the injection of the overall effectiveness of poor,plane contradiction is prominent,part of the wells water scurrying,water flooding and other serious problems.In or-der to improve the development effect of water injection in the Chang6 reservoir in this area and achieve water control and oil stabilization,research on the influence of reservoir non-homogeneity on the effect of water injection has been carried out at different levels.The results show:The long six low permeability sandstone reservoirs in this area are stronger inhomogeneities.The sand body in the layer is distributed in a positive rhythm,and the injected water is easy to surge along the high permeabili-ty section at the bottom,resulting in premature flooding at the bottom.Strong non-homogeneity between layers,uneven longi-tudinal distribution of sand layers,and the phenomenon of single-layer sudden advance of injected water is obvious;The var-ying degree of sand body development on the planes results in a prominent tongue-in-plane phenomenon.Therefore,in the process of water injection development for different causes of reservoir inhomogeneity,to take corresponding development meas-ures,can provide an important geological reference basis for improving the effect of water injection development.
Guoqi west areaextra-low permeability sandstone reservoirsreservoir inhomogeneitywater injection devel-opmentwater control and oil stabilization
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