东非裂谷Albert盆地北区地温场分布及其对原油物性影响  

The distribution of geothermal fields and its influence on the physical properties of crude oil in the north Albert Basin,East African Rift Valley

作　　者：刘钧 甘雨 吕文睿 沈默 卜范青 LIU Jun;GAN Yu;LYU Wenrui;SHEN Mo;BU Fanqing(CNOOC International Limited,Beijing 100028,China)

机构地区：[1]中国海洋石油国际有限公司,北京100028

出　　处：《复杂油气藏》2023年第3期308-314,共7页Complex Hydrocarbon Reservoirs

摘　　要：东非裂谷乌干达Albert湖盆北区不同油田的储层地温梯度存在较大差别,即使同一油田内部不同井区的地温梯度也存在很大差异。通过分析地温测试资料,总结归纳研究区现今地温梯度的分布规律及影响地温场差异分布的主控因素,并分析了区域原油物性差异分布特征及主要原因。结果表明:研究区地温是影响原油物性差异分布的主要因素,地温梯度由南往北整体呈逐渐减小趋势,影响地温梯度的主控因素是上覆盖层的泥岩厚度、泥质含量及断层分布模式。The geothermal gradients of different oil fields in the northern region of Lake Albert Basin in the East African Rift Valley of Uganda are quite different,even the geothermal gradients in different well zones within the same oilfield are also very different.Based on the analysis of ground temperature test data,the distribution law of the current ground temperature gradient in the study area and the main controlling actors affecting the distribution of the differences in the ground temperature field are summarized,and the distribution characteristics and main reasons for the differences in the physical properties of crude oil in the region are also analyzed.The results show that the ground temperature in the study area is the main factor influencing the distribution of differences in crude oil physical properties,the geothermal gradient decreases gradually from south to north,and the main controlling factors affecting the geothermal gradient are the mudstone thickness,the shale content,and the distribution pattern of faults in the overlying layer.

关 键 词：地温场 地温梯度 原油物性 主控因素 裂谷盆地 

分 类 号：P314[天文地球—固体地球物理学]