1基本情况1.1事故井基本情况介绍高18-21井组位于某厂某作业区高52区块09井区,开采长10油藏,该井组共有7口油井和3口水井。长10油藏从2008年初开始开发,同年11月开始注水。截至2013年7月,已开发油井168口,日产油611t;注水井开注47口,日注水577m3。主力层位埋深1 650m,原始地层压力13.05MPa,压力系数0.79,地层饱和压力10.78MPa,原始气油比 1 Basic Information 1.1 Introduction to Accident Wells The high 18-21 well group is located in the 09 well block of Block 52 in the high-pressure area of ​​a certain operation area of ​​a certain factory and has a Chang 10 oil reservoir. The well group has a total of 7 wells and 3 wells. Chang 10 reservoir development from the beginning of 2008, the same year in November began water. As of July 2013, 168 wells have been developed and 611t have been produced per day. There are 47 injection wells and 577m3 per day. The main layer depth of 1 650m, the original formation pressure of 13.05MPa, pressure coefficient of 0.79, formation saturation pressure of 10.78MPa, the original gas-oil ratio