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油田开发过程中油层参数不断发生变化,其中变化最大的是含油饱和度。正确确定储层中剩余油饱和度分布对于油田开发方案制定、调整具有重要的意义。油田已进入高含水开发后期,先进的油藏监测技术,为进一步认识油藏、改造油藏、利用油藏提供了可靠的依据。近年来,高精度碳氧比(C/O)能谱测井技术的推广,在剩余油挖潜和在新井投产前对产层进行再认识及堵水作业等应用方面取得了明显地质效果。2002—2003年,在萨中开发区的北一二排三次加密、北一二排二类油层上返和南一区二次加密、南一区聚合物等井上实施了C/O能谱测井51口,应用该技术投产效果好于方案设计。2003年对4口高含水老井进行了C/O能谱测井测试,在其指导下完成堵水补孔方案编制工作,取得降含水5个百分点的好效果。
The parameters of the oil layer keep changing during the oilfield development, among which the change is the oil saturation. Correctly determining the distribution of residual oil saturation in reservoirs is of great significance for the formulation and adjustment of oilfield development plans. The oilfield has entered the advanced development stage of high water cut. Advanced reservoir monitoring technology provides a reliable basis for further understanding of reservoirs, rebuilding reservoirs and utilization of reservoirs. In recent years, the promotion of high-precision C / O spectral logging has achieved remarkable geological results in tapping the potential of remaining oil and re-recognizing the formation before the new well goes into operation. From 2002 to 2003, C / O energy spectrum was measured in the wells of the Sa’azhong Development Zone in the north-first row, the third-time encryption, the north-first-second-row and the second-type reservoirs, Well 51, the application of the technology put into effect better than the program design. In 2003, C / O spectrum logging test was carried out on four high water-containing old wells. Under the guidance of the program, the program of water plugging and recharging was completed and a good effect of reducing water content by 5% was achieved.