非均质气藏水平井三维渗流的产能预测方法  

Productivity Prediction Method of 3D Seepage Horizontal Wells in Heterogeneity Gas Reservoir

作　　者：尹洪军[1] 吕杭[1] 蔡明[1] 张绍辉[2] 

机构地区：[1]东北石油大学提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]中国石油勘探开发研究院勘探与生产工程监督中心,北京100083

出　　处：《数学的实践与认识》2011年第16期59-64,共6页Mathematics in Practice and Theory

基　　金：国家自然科学基金(50874023);黑龙江省科技计划项目(GZ09A407);黑龙江省提高油气采收率原理与技术科技创新团队(2009td08)

摘　　要：建立了非均质气藏水平井三维渗流产能预测的数学模型,采用有限元方法对其进行求解,求解时将地质模型区块中不同空间位置处的渗透率值以及其它气藏物性参数分别布置到有限元模型的相应位置处的网格中,从而体现了三维空间中气藏的非均质特性.分析了非均质性对气藏水平井产能的影响.结果表明,气藏的非均质性对水平井的产气量影响很大,在相同的生产压差下,存在高渗透带的气藏水平井产量明显高于均质气藏水平井的产量;高渗透带条数越多、渗透率越大,导致气藏内压力消耗越小,水平井产量越高.最后,结合松辽盆地徐深层气田的地质特点和储层特性,给出了该气田的水平井产能预测实例.研究方法符合气藏的实际情况,为气藏水平井,特别是非均质气藏水平井的产能预测提供了一种行之有效的方法.The productivity prediction mathematical model of 3D seepage horizontal wells in heterogeneity gas reservoir is established and also quantitatively calculated by means of finite element method. The permeability and other gas reservoirs parameters of the different space in the geological model is spread to the grid in the corresponding position of the finite element model, which represents the heterogeneity in the 3D gas reservoir. The effect of the heterogeneity on the productivity of the horizontal wells in gas reservior is analysized. The result shows that the reservoir heterogeneity plays an important role in gas productivity production from horizontal wells, and the gas production of horizontal wells with high permeability channels is obviously higher than the horizontal wells which in homogeneous gas reservoir under the condition of the same drawdown pressure. The more number of the high permeability and the bigger the permeability, the ＇smaller the pressure consumption, and the higher the horizontal output. Eventually, according to the geological characteristics and the reservoir features of a deep gas field located in Songiiao Basin, an example on productivity prediction of horizontal wells in this gas field is presented. Study presented in this paper is accordant with the practical situation, providing an effective approach to predict productivity of horizontal wells in gas reservoir, especially in anisotropic gas reservoir.

关 键 词：三维 非均质 有限元 气藏 水平井 产能预测 

分 类 号：TE328[石油与天然气工程—油气田开发工程]