低渗透非均质油藏动用程度评价新方法  

A new evaluation method of producing degree for low-permeability heterogeneous reservoirs

作　　者：宋洪庆[1] 朱维耀[1] 沈全富[2] 宋吉水[2] 黄小荷[1] 

机构地区：[1]北京科技大学,北京100083 [2]中油大庆油田有限责任公司,黑龙江大庆163100

出　　处：《特种油气藏》2009年第1期64-67,共4页Special Oil & Gas Reservoirs

基　　金：国家自然基金项目“特低渗透油层整体压裂两相渗流理论研究”(10772023);国家重点基础研究发展计划“中低丰度天然气藏大面积成藏机理与有效开发的基础研究”(2007CB209500)资金资助

摘　　要：根据低渗透非均质油藏的特点,分析了启动压力梯度、纵向非均质性、小层厚度和平面砂体厚度展布对该类油藏开发的影响。从势能叠加原理出发,推导出该类油藏小层有效驱动半径计算公式。根据该公式建立低渗透非均质油藏动用程度评价方法。实例分析表明,该方法具有预测精度高、简便和实用等优点,能为进一步有效开发低渗透非均质油藏提供一定的指导。The influences of threshold pressure gradient, vertical heterogeneity, subzone thickness and areal sand thickness distribution on development of low-permeability heterogeneous reservoirs are analyzed. The calculation formula of effective drive radius is presented for subzones in low-permeability reservoirs based on potential energy superposition principle. Then a new evaluation method of producing degree is developed for low-permeability heterogeneous reservoirs. It has been verified by calculation example that this method has the advantages of high accuracy, practicality and availability, and provides convenience for further development of low-permeability heterogeneous reservoirs.

关 键 词：低渗透油藏 有效驱动半径 非均质油藏 砂体厚度展布 启动压力梯度 动用程度 

分 类 号：TE33[石油与天然气工程—油气田开发工程]