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出 处:《价值工程》2015年第15期220-222,共3页Value Engineering
基 金:国家自然科学基金项目(编号:U1262106);全国油气资源战略选取调查与评价国家专项(编号:2009GYXQ13);黑龙江研究生创新科研项目(编号:YJSCX2012-064HLJ)联合资助
摘 要:茨榆坨采油厂牛74块沙二段储层物性较差,层内非均质性较强。为了研究储层层内非均质性,常用层内渗透率变异系数、突进系数、级差来定量表征储层层内非均质强弱程度。然而利用传统的地质统计学的方法计算出的渗透率变异系数范围在0^+∞之间,很难从定量的建立层内非均质程度的概念。针对此问题,本文利用与数据分布类型无关的洛伦兹曲线法建立层内渗透率变异系数模型,它求出的范围在0~1之间,可比性、适应性强,能明确反应层内非均质强弱程度。劳伦兹曲线法更适用于储层非均质性定量评价。S-2 segment reservoir’s physical property in Ciyutuo Oil production plant N74 pieces is bad, intraformational heterogeneity is relatively strong. In order to study the reservoir heterogeneity in reservoir stratum, it is commonly uses the permeability variation coefficient, dash coefficient and differential in the layer to express the characterize strength level of the heterogeneity in the reservoir stratum. However, the permeability variation coefficient's calculation results of utilizing traditional way of geostatistics is ranging from 0 to+∞, it is difficult to establish the concept of intraformational heterogeneity degree quantitatively. Aimed at this problem, this article utilizes Lorentz curve which has nothing to do with the data distribution to build the layer permeability variation coefficient model, the result is ranging from 0 to 1, it has strong comparability and adaptability which can clearly react intraformational heterogeneity degree of strength. The way of Lorentz curve is more suitable for the reservoir heterogeneity quantitatively evaluate.
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