摘要
根据压裂气井地层中气体的渗流过程,用严格的渗流力学方法建立气藏中存在一条有限导流能力垂直裂缝的渗流数学模型,通过采用离散方法求解可以获得一系列无量纲裂缝导流能力参数条件下井筒无量纲压力与无量纲时间的关系数据,由此可以预测一定气层和裂缝参数条件下压裂气井的产量随时间的变化情况。应用该方法对苏里格低渗透气田某一区块的压裂井初期动态产量进行预测,并分析裂缝长度、高度和导流能力对气井产量的影响,预测值与实际值的误差在10%以内。
The gas seepage model in the gas reservoir with a vertical fracture of finite seepage capacity is established based on the strict fluid mechanics. The relational data between dimensionless wellbore pressure drop and dimensionless time under different dimensionless fracture seepage capacity can be obtained by solving the mathematical model using discretization in time and space,and the dynamic production of a fracturing gas well under given reservoir conditions and fracture parameters can be predicted by means of the relational data. The method is used for the early dynamic production prediction of the fracturing gas wells in a block of Sulige Gasfield,and the effects of fracture length,height and seepage capacity on the early dynamic production of a fracturing gas well are analyzed. A case shows that the error between the predicted and the actual production is less than 10%.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2015年第1期57-61,7,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中石油重大科技专项"致密气藏开发重大工程技术研究"(编号:2010E-23)
关键词
低渗透气田
压裂气井
动态产量预测
裂缝参数
low-permeability gas field
fracturing gas well
dynamic production prediction
fracture parameter
