氯能谱测井方法在卫城油田的应用研究

卫城油田储层孔隙度平均为14%，渗透率一般为(11～22)×10^－３μm²，泥质含量高，地层破碎，钻井时泥浆侵入深，地层水矿化度高，使得该油田的裸眼测井解释结论往往不可靠。针对存在的问题，该油田应用了氯能谱测井方法。应用效果表明，该方法能克服泥质含量高的低阻油层以及由于地层破碎泥浆侵入很深，超过了仪器的探测深度，使得裸眼测井解释结论不可靠的弊端，能识别低阻油层、识别干层和差油层、确定地层的孔隙度、剩余油饱和度、判断水淹层、水淹级别等，为油田的开发后期调整挖潜提供准确的依据。该方法预测精度高，是高矿化度油田开发后期较好的一种监测手段，在高矿化度地区值得推广应用。

The Applying Study of the Chlorine Logging in Weicheng Oil field

In Weicheng oil-field, the porosity is 14% and the permeability is(11~12)×10^-3μm². Moreover, the formation of Weicheng oil -field has the character of high shale content and high salinity. So the interpret results of conventional logging of oil- field have not reliability. Chlorine loggng whic ia ggig method of pulsed neutron logging can recognize the oil-bearing of low resistance, determinate the porosity and the remaining oil saturation and the watered-out area and the water-out degree and the water-oil contact and so on. It can complete the neutron lifetime log (NLL) and carbon/oxygen ratio log and the combination of induced polarization electrometric method log and the spontaneous potential (SP).So it is a good monitoring method of the development post-period high saliity oil-field. The pracal data verifies the validity of this method.