| 如何消除应用于合采井原油产量分配计算的气相色谱指纹技术存在的缺陷 |
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| 引用本文： | 邹宇峥,蔡元明,马亭,梅博文.如何消除应用于合采井原油产量分配计算的气相色谱指纹技术存在的缺陷[J].石油实验地质,2001,23(2):213-220. |
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| 作者姓名： | 邹宇峥 蔡元明 马亭 梅博文 |
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| 作者单位： | 1.中国石化无锡实验地质研究所, 江苏无锡 214151 |
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| 基金项目： | 中国石油天然气集团公司资助项目(990203-04-02). |
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| 摘 要： | 气相色谱指纹技术(以下简称GCF)作为油藏地球化学领域中的一项重要技术,为油田管理和开发工作作出了重大贡献。GCF被应用于合采井原油产量分配计算已经取得初步成效,但是它在应用的过程中已暴露出了诸多缺陷。这些缺陷是:①GCF不可避免会受噪声影响,从而对仪器的稳定性要求比较严格;②进样量及进样的速度仍须基本保持一致;③对于无正构烷烃的生物降解油,峰的确定相对困难;④峰高的大小受操作者确定的积分方式的影响较大;⑤建立在绝对线性叠加基础上的“标准图版”法并不存在严格的普遍性,这样的近似从理论上讲是有缺陷的,用常规的数学方法往往得不到正确的结果;⑥三层合采的问题仍然没有得到较好的解决。文中对其理论上的缺陷作了数学上的严密推导,证明了峰高比值和产量分配百分比并不具有线性叠加关系,并针对以上缺陷提出了两个改进方案:⑴内标法;⑵偏最小二乘法。着重对方案⑵进行了深入的研究和探讨。通过对早期GCF的改进,对于人工配比混合油的预测值与真实值的绝对误差小于5%,由此证明方案⑵是准确、可靠的。对同一口合采井,文中将方案⑵的计算结果与紫外光谱技术(以下简称UV)的计算结果进行了对比,两种方法具有相当好的符合性和可比性。最后,该文较为详细地讨论了GCF和UV两种技术各自所适用的范围。在应用的过程中, 这两种技术是互为补充的, 应当根据具体情况加以选择。
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| 关 键 词： | 产量分配 偏最小二乘法 气相色谱指纹 合采油井 紫外光谱 油藏地球化学 |
| 文章编号： | 1001-6112(2001)02-0213-08 |
| 收稿时间： | 2000-09-15 |
| 修稿时间： | 2000年9月15日 |
HOW TO ELIMINATE THE DEFECTS OF GCF APPLIED TO THE PRODUCTION-PARTITIONING
CALCULATION OF CRUDE OIL IN CONPRODUCING WELLS |
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| Affiliation: | 1.Wuxi Research Institute of Experimental Geology, SINOPEC, Wuxi, Jiangsu 214151, China2. Testing Center, Jianghan Petroleum College, Jingzhou, Hubei 434100, China |
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| Abstract: | WT5BZ]As an important technique in the reservoir geochemical domain,the gas chromatographic fingerprints technique (GCF) has made great contribution to the administration and development of oilfields.GCF has won initial success when applied to the production partitioning calculation of crude oil in conproducing wells.But many defects as follows were revealed during its application.(1) As GCF is affected by noise unavoidably,the requirements for the stability of instruments are very strict.(2) the amount and velocity of inlet samples must be kept identical on the whole.(3) The determination of peaks is relatively difficult for biodegraded oil without n alkane.(4) The peak height is greatly affected by the integration method the operator selects.(5) As the "standard plate" method established on the basis of absolute linear stacking has not strict universality,the approximation has defects theoretically and correct results cannot be obtained usually by means of conventional mathematical methods.(6) The questions about trilayer conproduction have not been resolved better.About its theoretical defects,it is proved by strict mathematical deduction that there is no linear stacking relationship between peak height ratios and production partitioning percentages.Furthermore,the internal standard method and the bias least square method two improving schemes aimed at the above defects were suggested,and the later scheme was studied and discussed emphatically and thoroughly.By improvement on original GCF,the absolute error between predicted and measured values for artificial partition mixed oil is less than 5%. This proved the accuracy and reliability of the later scheme.The comparison of the calculation results from the later scheme with those from the ultraviolet spectral technique (UV) for the same conproducing well shows that the two methods have quite good coincidence and comparability.At last,the respective appliable ranges of GCF and UV two techniques are discussed in detail.As the two techniques are mutually complementary,we must make selections according to concrete conditions in the course of application. |
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| Keywords: | WT5BZ]production partition the bias least square method gas chromatographic fingerprints conproducing oil wells ultraviolet spectrum reservoir geochemistry |
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