疏松砂岩油藏大孔道识别的典型曲线方法  

Typical Curves of Identification of High Capacity Channel in Unconsolidated Sand-stone Oil Reservoirs

作　　者：高慧梅[1] 姜汉桥[2] 陈民锋[2] 

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中国石油大学(北京)石油天然气工程学院,北京102249

出　　处：《石油天然气学报》2009年第1期108-111,共4页Journal of Oil and Gas Technology

基　　金：中国石油天然气集团公司石油科技中青年创新基金项目(04E7029)

摘　　要：大孔道是疏松砂岩油藏长期注水冲刷形成的次生高渗透条带,极易造成注水低效循环。为了识别大孔道出现时机和发育程度,采用数值模拟方法,绘制了分流系数RKH、非均质系数RLH和不同大孔道出现时机影响的水驱特征典型曲线,分析指出大孔道出现的越早,相同采出程度下的水油比上升得越快;大孔道发育程度越高,随着瞬时水油比的增加,采出程度对含水率的导数曲线上波峰出现得越晚。研究表明对照不同的曲线图版拟合一口特定井或井组的实际数据能够识别非均质程度和存在大孔道的可能性。本文的曲线图版在吉林扶余油田的实际应用中取得了较好的效果。The high capacity channel developed in long-term water flooding reservoir reduced the sweeping efficiency.In order to study the time and degree of high capacity channel by using numerical simulation,a series of type curves were plotted which studied the influence of diverting index RKH,heterogeneity index RLH and appear time of high capacity channel influencing the water-flooding characters.The results show WOR is raised rapidly as the high capacity channel appears earlier at the same degree of reserves recovery.As development degree of high capacity channel is high,wave crest in the curve for derivation of reserves recovery degree to water-cut appears later with the increase of instantaneous WOR.The actual data for a given well or a group of wells can be matched with various patterns to identify the degree of heterogeneity and the potential existence of a high capacity channel.The practical application in Fuyu Oilfield obtains a better result.

关 键 词：大孔道 典型曲线 数值模拟 分流系数 砂岩油藏 水驱 

分 类 号：P618.13[天文地球—矿床学]