低压稠油油田测试设计及钻井完井过程中油层损害评价方法

Well Testing Design for Low Pressure Viscous Oilfields and Evaluation Method for Formation Damage in Drilling Operations

绥中36-1油田和秦皇岛32-6油田都属低压稠油油藏,其储层岩石疏松,孔渗性极佳。在完井试油测试中,必须对测试方案进行合理的设计,选取合理的测试压差,以防止速敏性和应力敏感性造成地层损害。根据储层测试过程中的损害特点,对完井过程中的测试方案进行了设计,对测试设计的风险进行了评价,并在此基础上,给出了钻井完井过程中油层损害的评价方法。

Both SZ 36 - 1 and QHD 32 - 6 are low pressure viscous oil fields with unconsolidated reservoirs and very high porosity. It is vital to have reasonable design for well testing and test differential pressure in order to prevent formation damage by quick sensitivity and stress sensitivity. According to the nature of formation damage, an evaluation is given in this paper to the design and risks of well testing. And an evaluation method is introduced for formation damages during drilling and completion.