碳氧比测井在中原油田的应用

中原油田主要储集层为中低孔隙度储层，随着油田开发时间的推移，地下情况日趋势复杂，注水、开发、调整都存在关很大难度。文中从这基本情况出发，根据中原油田十来年应用碳氧比测井的实际情况，采取了矿化度指示法、孔隙度特征曲线对比法等多种有效的判别气层、判断油气界面的方法，按照水淹层解释标准，其解释符合率均在８０％以上；在文明寨、濮城、马厂、文留等油田确定剩同饱和度，寻找未被水淹的区块和层位，提高开发程度取得

Application of Carbon-Oxygen Log in Zhongyuan Oilfield Development

The main reservoir in Zhongyuan Oilfield is sand-shale profile with middle or low porosity,with the oil field development lasted,the underground situation is gradually complicated. There exists great difficulty in injection,development and adjustment. This paper adopts salinity-indicator and porositycharacterzstic curve correlation effective methods to distinguish gas-bearing formation and gas-oil contact on the basis of ten years carbon-oxygen ratio (C/O) log practice. According to the waterflooded interpretation standard,this interpretation coincidence rate is above eighty percent. It has made obvious good result in Wenmingzai,Pucheng,Machang, Wenliu Oilfields to determine remaining oil saturation,find non-waterflooded region and raise development level. Another this paper puts forward improvement and perfect in low counting rate and bad repeatability in C/O log at present. It also suggests using high resolution C/O log tool in order to make C/O log have a good use in Zhongyuan Oilfield.