作　　者： ; ; (严小勇）;

机构地区： 西南石油大学

出　　处： 《油气井测试》 2013年第6期5-7,13,共4页

摘　　要： 水平井分段压裂是低渗油气藏增产的重要措施之一。针对压裂水平井的试井分析,开发出压裂水平井无限导流多裂缝渗流的半解析数学模型。该模型是一类求解无限导流多裂缝系统的井底压力和流率分布的通用机制,通过更换离散裂缝单元的压力响应,即可计算其它的油藏条件下的压力响应。分析讨论了压裂水平井的典型曲线可能展现出的裂缝线性流、裂缝拟径向流、系统线性流和系统拟径向流的4种流动机制,裂缝线性流之后的可能出现裂缝拟径向流期压力导数水平段,容易被误解为全系统的径向流段。通过现场实测资料证实了与理论动态的一致性。针对试井解释计算的实时性要求,提出了压裂水平井压力动态的快速近似计算模型,该模型可进一步应用于压裂水平井产能评价与生产动态预测。 For analysis of well test of multifractured horizontal well(MFHW),a mathematical model of semi-analytical infinite conductivity multiple fracture flow for MFHW is developed.It is general mechanism for calculated bottom pressure and flow rate distribution of infinite conductivity multiple fracture system.By replacing the discrete unit pressure response,the dynamic of MFHW can be calculated for other types of reservoir.Four kinds of flow regimes,which are crack linear flow,crack pseudo radial flow,the system flow and system of linear pseudo radial flow will show on log-log type curve of MFHW.The derivative horizontal segment of fracture pseudoradial flow that is behind liner flow would misunderstand easily as total radial system flow.Field measured data is consistent with theoretical results.According to well test interpretation real time calculation,a fast approximate calculation model is presented for MFHW pressure dynamic.The model can apply to evaluate productivity and predict production performance of MFHW.

关 键 词： 压裂水平井 试井分析 解释模型 流动机制

领　　域： [石油与天然气工程]