石油与天然气地质 ›› 2000, Vol. 21 ›› Issue (2): 168-172.doi: 10.11743/ogg20000219

• 技术经纬 • 上一篇    下一篇

合采井原油产量分配计算的新技术──紫外光谱法

邹宇峥, 马亭, 梅博文   

  1. 江汉石油学院地球化学研究中心,湖北荆州434102
  • 收稿日期:2000-01-27 出版日期:2000-06-25 发布日期:2012-01-16
  • 基金项目:

    中国石油天然气集团公司资助项目:流体动态监测新技术与剩余油预测(编号:9902030402)部分成果

ULTRAVIOLET SPECTROMETRY——A NEW TECHNIQUE FOR CALCULATING OIL PRODUCTION ALLOCATION OF MINGLING RECOVERY WELLS

Zou Yuzheng, Ma Ting, Mei Bowen   

  1. Geochemistry Research Center, Jianghan Petroleum Institute, Jingzhou, Hubei
  • Received:2000-01-27 Online:2000-06-25 Published:2012-01-16

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摘要：

气相色谱指纹法的理论基础和反相液相色谱法的预处理方法在计算合采井原油产量分配时暴露出一些缺点。引入广泛用于测定多组分体系中各金属离子浓度的偏最小二乘紫外光谱法,可以有效地避免这些问题。不同层位的原油在生、运、聚的过程中,由于所经历的地质色层效应和次生作用(如生物降解)存在着差别,致使原油对紫外光谱的吸收产生可检测的差异。因此,可根据朗伯比耳定律建立原油吸光系数(ε)与产量分配百分比的线性叠加关系,用以精确求解合采井各单油层的产量分配。使用该方法在进行数据处理时,应考虑4个方面的因素:(1)在所选波长范围内,吸光度与浓度的线性关系要好;(2)在200～400nm波长范围内,尽量选取单层原油吸光系数差异大的波长段;(3)定量分析波长范围应尽量选择“峰顶”区域;(4)尽量避免尖峰。

关键词: 紫外光谱, 吸光度, 吸光系数, 偏最小二乘法, 原油, 合采井, 产量分配

Abstract:

Both the gas fingerprint chromatography and the preprocessing of reverse liquid chromatogram have shown their faults in calculating oil production allocation of mingling recovery wells.These faults could be solved through the determination of the concentration of metallic ions in multi-component systems by partial least-square ultraviolet spectrometry. Oils in different horizons have different ultraviolet spectrum absorption. The linear stacking relationship between crude oil absorptivity and oil production allocation percentage could be established according to Lambert-Beer's law,and oil production allocation of each end member could be calculated.Following points should be taken into acount in data processing by this method: 1.betterlinearrelationship between the absorbance and concentration in selected wavelength range(interval); 2.selecting data with great difference of absorptivity in the interval of 200～400 nm wavelength; 3.selecting quantitative analysis in the range of peak tops; 4.avoiding sharp peaks.

Key words: ultraviolet spectromotry, absorptivity, partial least-square, crude oil, mingling recovery well, production allocation

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