垂向与球形渗流的测定及应用

DETERMINATION AND APPLICATION OF VERTICAL AND SPHERICAL VADOS FLOWS

陈平中 夏位荣 王新海

Chen Pingzhong Xia Weirong Wang Xinhai

通过垂向干扰测试,表明塔里木盆地东河砂岩油藏存在垂向渗流。在有垂向渗流且打开程度不完善的油井中,流体的流态表现为球形渗流,它是平面渗流和垂向渗流的总和。在地层测试解释中,若仍用平面径向流方法,则必然造成渗透率解释的严重偏差。对于这类油藏,打水平井或斜井能有效地提高产能。水平井提高产能的幅度随/的增大而增大;斜井在任何渗透率比值下都能提高产能,以井斜大于40°时最为明显。二者相较水平井比斜井更优。

The result of vertical interference test shows that vados flow exists in Donghe sandstonereservoir. In incompletely opened oil wells with vertical vados flow, the flowing shape of fluidappears to be spherical vados flow, and it is the sum of planar and vertical vados flow. In formation test interpretation, plane radial flow method would result in serious deviation of permeability interpretation. But horizontal well and deflecting well could effeciently improve theproductivity of this kind of reservoir. The amount of improved productivity would increasewith the increasing of /; deflecting well could improve the productivity at any permeability ratia, and the result would be more favourable when inclination is greater than 40?. Incomparason, the horizontal well is much better than the deflecting well.

10.11743/ogg19950307