摘要
针对目前储层非均质性诸多表征参数存在的计算数值无界、分类方案主观性强及表征方法定量化程度低等问题,以洛伦兹曲线法为理论基础,通过对洛伦兹曲线法求得的数据进行数学变换处理,定义了一种新的非均质综合表征参数。该方法运算简单,参数具有对比性强、能定量化表征非均质程度、适用于任何类型油藏等优点。应用该方法对旅大油田的储层非均质性研究结果表明,旅大油田储层为中等非均质性,但层间及平面非均质程度较强。针对其储层非均质特征,制定了适合的开发调整思路:东二段上亚段实施联合开发,以定向井开发为主,少量水平(分支)井挖潜为辅;东二段下亚段实施分层系开发,分级分层配注调整措施。研究结果应用于旅大油田综合调整和提高采收率等方面效果显著,在综合含水率降低9%的同时,产油量增加约1000m3/d。
There are some defects in the existing evaluation systems of reservoir heterogeneity such as its unbounded parameters, high subjectivity classification and low degree of quantification. Based on Lorenz curve method, with the new transform process of data, a new parameter named as comprehensive coefficient of heterogeneity is used in reservoir heterogeneity research. This operation is very simple and the parameter has the virtues of strong comparison, quantitative characterization of heterogeneity degree and is applicable for any type of reservoirs. In the comprehensive research of reservoir heterogeneity in LD oilfield, the application result indicates that the level of LD oilfield reservoir heterogeneity is moderate, but the interlayer and horizontal heterogeneity is strong. For the heterogeneity characteristics of LD oilfield, the appropriate development adjustments are carried out; the main development method is directional wells with few horizontal wells or multi-lateral wells supplemented in K3d2U reservoir. At the same time, the separate stratum development and separated layer and injection process are used in E3d2L reservoir. It has significant practical guidance in oilfield adjustment and enhanced oil recovery. It is remarkable that the reduction in water cut is 9%,while the daily oil production increased by about 1000 m3/d.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2012年第5期88-90,103,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"海上稠油高效开发新技术"(2008ZX05024)
关键词
储层非均质性
洛伦兹曲线
层间干扰
分层系开发
开发调整
reservoir heterogeneity
Lorentz curve
formation interference
separate stratum development
development adjustments
