储层物性下限确定方法的研究现状与展望
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摘要
储层物性下限是储量评价中识别储层、确定有效厚度的重要参数。系统考察储层物性下限确定方法,并对技术发展方向进行展望。研究认为:可依据方法、使用资料特点将物性下限方法分为岩心分析、测试分析两大类;岩心分析方法通过统计分析实验室测量的孔隙度、渗透率等参数确定各种阈值作为物性下限,确定的物性下限比较乐观,适用于测试资料较少的勘探阶段;测试分析方法通过统计分析产液能力与含油产状、孔隙度、渗透率等参数的关系来给出物性下限,确定的物性下限比较保守,适合在开发阶段使用,与岩心分析方法组合使用可在开发阶段动态确定物性下限;物性下限研究应该注意非均质性、试油工艺等问题带来的冲击。
Petrophysical property cutoffs are important parameters to identify reservoirs and their effective thickness in calculating reserves. Based on literature review and case studies,the methods for petrophysical property cutoffs and development trends are explored. Some conclusions can be drawn: 1) all methods can be divided into core analysis method and oil test method based on the characteristics of the methods and the data used; 2) core analysis method can take some thresholds as petrophysical property cutoffs through statistical analysis of parameters such as porosity,permeability and so on. Its results are aggressive and the method is suitable to exploration stages where no enough test data is present; 3) oil test method can get petrophysical property cutoffs through statistical analysis on the relation of production capacity with some parameters such as oil-bearing occurrence,porosity,permeability and so on. Its results are conservative and the method applies to development stage. In addition,it is good to make dynamic adjustment of the cutoffs in development stages with the combination of core analysis method and oil test method; 4) it is necessary to pay more attention to the impacts of some issues such as reservoir heterogeneity,production test and so on.
Petrophysical property cutoffs are important parameters to identify reservoirs and their effective thickness in calculating reserves. Based on literature review and case studies,the methods for petrophysical property cutoffs and development trends are explored. Some conclusions can be drawn: 1) all methods can be divided into core analysis method and oil test method based on the characteristics of the methods and the data used; 2) core analysis method can take some thresholds as petrophysical property cutoffs through statistical analysis of parameters such as porosity,permeability and so on. Its results are aggressive and the method is suitable to exploration stages where no enough test data is present; 3) oil test method can get petrophysical property cutoffs through statistical analysis on the relation of production capacity with some parameters such as oil-bearing occurrence,porosity,permeability and so on. Its results are conservative and the method applies to development stage. In addition,it is good to make dynamic adjustment of the cutoffs in development stages with the combination of core analysis method and oil test method; 4) it is necessary to pay more attention to the impacts of some issues such as reservoir heterogeneity,production test and so on.
引文
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