低电阻油层测井方法在江汉油区的应用

Application of well-logging method for low resistivity oil layers in Jianghan Oil Region

低电阻率油层包括含有高矿化度地层水的油层、高含水饱和度和低含油饱和度的油层或富含泥质的砂岩低电阻油层等。其形成因素可归纳为受岩性、孔隙结构、流体性质及泥浆侵入影响等。为了识别低电阻油层,我们采用了多种方法,例如图版法、电阻率曲线重叠法、密度与声波曲线重叠法或密度、声波与中子曲线重叠法,以及定量解释法等。这些方法用于江汉油区的测井资料处理,取得良好效果。

The low resistivity oil layers include those layers with high salinity formation water, high water saturation and low oil saturation,or riched in argilliferous sandstone low resistivity oil layers. The forming factors which have influenced low resistivity may be summarized lithology,pore texture,fluid property and mud intrusion etc. In order to recognize low resistivity oil layers,we have used many methods,such as engraving method,resistivity curve overlapping method,density and acoustic curves overlapping method,or density,acoustic and neutron curves overlapping method,as well as quantitative interpretation method, etc. These methods have been used in logging data processing in Jianghan Oil Region and have gained good effects.