利用泰尔指数定量表征储层非均质性的一种新方法
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摘要
针对目前油气储层宏观非均质性评价参数众多、评价指标无边界的问题,提出了一种利用泰尔指数定量表征储层非均质性的新方法。该方法利用地层不均匀导致的测井数据差异来解释储层非均质性。以我国沿海地区M油田为例,以测井曲线中准确度较高的渗透率数据为基础,计算出储层内每个小层和层间的泰尔指数,并分别与变异系数法、洛伦兹系数法计算结果进行对比拟合。结果显示:在储层层内非均质性评价中,对泰尔指数与变异系数进行回归,相关性可达96%;对泰尔指数与洛伦兹系数进行回归,相关性可达95%。在储层层间非均质性评价中,对泰尔指数与变异系数进行回归,相关性可达99%。上述实验结果均表明泰尔指数法具有很高的准确性。综合分析,泰尔指数法具有方法简单、适用范围广、能同时定量表征层内和层间非均质性的优点,可以用于描述油气储层非均质性,为油气生产提供一定依据。
Aiming at the problems of numerous evaluation parameters and no boundary of evaluation indexes on macro-heterogeneity of oil and gas reservoirs at present,a new method named Theil index for quantitative characterization of reservoir heterogeneity was proposed.The principle of this method is that difference of log-ging data resulted from uneven formations was used to explain reservoir heterogeneity.Oilfield M in coastal areas of China was studied.On the basis of the permeability data with high accuracy in logging curves,the Theil index of each subzone and interlayer in reservoirs was calculated and compared with the results of variation coefficient method and Lorentz coefficient method.The results show that the correlation between Theil index and variation coefficient or Lorentz coefficient was 96% and 95% respectively through regression during the intralayer heterogeneity evaluation.The correlation between Theil index and variation coefficient was up to 99% during the interlayer heterogeneity evaluation.Those show the high accuracy of the Theil index method.Comprehensive analysis presents that the Theil index method is simple with the advantages of wide applica-tion range and simultaneous quantitative characterization of intralayer and interlayer heterogeneity.It can be used to describe the heterogeneity of oil and gas reservoirs and provide a basis for oil and gas production.
Aiming at the problems of numerous evaluation parameters and no boundary of evaluation indexes on macro-heterogeneity of oil and gas reservoirs at present,a new method named Theil index for quantitative characterization of reservoir heterogeneity was proposed.The principle of this method is that difference of log-ging data resulted from uneven formations was used to explain reservoir heterogeneity.Oilfield M in coastal areas of China was studied.On the basis of the permeability data with high accuracy in logging curves,the Theil index of each subzone and interlayer in reservoirs was calculated and compared with the results of variation coefficient method and Lorentz coefficient method.The results show that the correlation between Theil index and variation coefficient or Lorentz coefficient was 96% and 95% respectively through regression during the intralayer heterogeneity evaluation.The correlation between Theil index and variation coefficient was up to 99% during the interlayer heterogeneity evaluation.Those show the high accuracy of the Theil index method.Comprehensive analysis presents that the Theil index method is simple with the advantages of wide applica-tion range and simultaneous quantitative characterization of intralayer and interlayer heterogeneity.It can be used to describe the heterogeneity of oil and gas reservoirs and provide a basis for oil and gas production.
引文
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[10]彭仕宓,史彦尧,韩涛.油田高含水期窜流通道定量描述方法[J].石油学报,2007,28(5):79-84.
[11]彭定贇,王磊.财政调节、福利均等化与地区收入差距——基于泰尔指数的实证分析[J].经济学家,2013(5):21-28.
[12]岳崇旺,杨小明,钟晓勤,等.利用测井曲线的洛伦兹系数评价地层的非均质性[J].吉林大学学报:地球科学版,2015,45(5):1539-1546.
[2]杨茜,付玲.致密砂岩气的成藏机理及勘探前景[J].断块油气田,2012,19(3):302-306
[3]戴金星,倪云燕,吴小奇.中国致密砂岩气及在勘探开发上的重要意义[J].石油勘探与开发,2012,39(3):257-264.
[4]姜香云,吴胜和,王绍华.大港油田官104断块储层非均质性研究[J].地球物理学进展,2007,22(5):1446-1454.
[5]张兴平,衣英杰,夏冰,等.利用多种参数定量评价储层层间非均质性——以尚店油田为例[J].油气地质与采收率,2004,11(1):56-57.
[6]许宏龙,刘建,龚刘凭,等.储层非均质性研究方法综述[J].中外能源,2015,20(8):41-45.
[7]焦养泉,李思田,李祯,等.碎屑岩储层物性非均质性的层次结构[J].石油与天然气地质,1998,19(2):89-92.
[8]何琰,殷军,吴念胜.储层非均质性描述的地质统计学方法[J].西南石油学院学报,2001.2(3):13-15.
[9]杨少春.储层非均质性定量研究的新方法[J].石油大学学报:自然科学版,2000,24(1):53-56.
[10]彭仕宓,史彦尧,韩涛.油田高含水期窜流通道定量描述方法[J].石油学报,2007,28(5):79-84.
[11]彭定贇,王磊.财政调节、福利均等化与地区收入差距——基于泰尔指数的实证分析[J].经济学家,2013(5):21-28.
[12]岳崇旺,杨小明,钟晓勤,等.利用测井曲线的洛伦兹系数评价地层的非均质性[J].吉林大学学报:地球科学版,2015,45(5):1539-1546.
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