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从数学模型建立到图示求解,建立了应用紫外光谱技术计算合采井单层产能贡献的新方法。以计算出的单层和人工配比油样的吸光系数为纵坐标,以波长为横坐标作图,得到配比标准图版。将混采井油样的紫外光谱分析结果插入标准图版中比对,与之最接近的那条人工配比曲线的配比即为混采井油样中各单层油组所占的比例。以QHD32-6-3井区稠油油藏为例,应用该方法计算了A22井单层产能贡献。结果表明,Nm_4油组是A22井产能的主要贡献者,Nm_4油组占70%,Nm_1油组占30%。应用紫外光谱技术,特别是对应用谱指纹技术有一定局限性的生物降解稠油,使合采井产量贡献监测又多了一项油藏地球化学实验技术。
From the establishment of the mathematical model to the graphical solution, a new method of calculating the single-layer productivity contribution of combined production wells by UV spectroscopy was established. To calculate the single-layer and artificial ratio of the oil absorption coefficient for the vertical axis to the wavelength of the abscissa for mapping, to obtain the ratio of standard plate. The mixed oil wells UV spectrum analysis results into the standard version of the comparison, the closest match with the ratio of the artificial mixture that is the mixed oil wells in the proportion of the single-layer oil group. Taking the heavy oil reservoir in QHD32-6-3 well area as an example, this method is used to calculate the contribution of single-layer capacity in A22 well. The results show that Nm_4 oil is the main contributor to the productivity of well A22, with Nm_4 oil group accounting for 70% and Nm_1 oil group accounting for 30%. Application of UV spectroscopy, especially for biodegradable heavy oil with some limitations of spectral fingerprinting, has added another reservoir geochemical experimental technique to monitor the contribution of combined production wells.