摘要
岩石润湿性差异是影响油藏注水开发效果的重要因素。由于油层间岩石润湿性变化,造成油层水驱过程中残余油饱和度差异和测井电阻率响应特征的不同。亲油岩石水驱后呈现高残余油和较高电阻率,是造成水淹级别预测偏差的主要原因。针对中国西部某油田,提出利用冲洗带电阻率-深感应电阻率-估算的原始电阻率对水淹层润湿性类型特征进行界定,再进一步选择不同的解释模型和参数进行水淹层等级评价,建立利用测井资料进行润湿性识别和水淹层等级评价的方法。
Rock wettability variation is the important factor of water flooding effectiveness. In the course of water drive, the changes of reservoir wettability cause the differences of residual oil saturation and logging resistivity respond feature. After the water flood development, oil-wet rock shows high residual oil saturation and high resistivity, which is the main cause of forecast deviation for flooding level. For a certain instance of the oilfield in western China, proposed is a range restriction about the wettability of the water flood zone by flushed zone resistivity--deep induction resistivity--estimated primary resistivity. Then, a different interpretation model and parameter are used to evaluate flooding levels. Established are methods of rock wettability identification and water flooded level evaluation with log data.
出处
《测井技术》
CAS
CSCD
北大核心
2010年第3期284-288,共5页
Well Logging Technology
关键词
测井响应
润湿性
水淹层
电阻率
残余油饱和度
亲油模式
亲水模式
logging response, wettability, water flooded zone, resistivity, residual oil saturation, oil-wet model, water-wet model
