施尚明;邱树立;汪佳;马军弟;王艳玲;

• 1:大庆石油学院地球科学学院,大庆石油学院地球科学学院,大庆石油学院地球科学学院,长庆油田公司第二采气厂,长庆油田公司第二采气厂 黑龙江大庆163318,黑龙江大庆163318,黑龙江大庆163318,陕西榆林719000,陕西榆林719000

摘要：

大庆油田庆深气田的深层天然气井具有井深、井底温度高、井底压力大、气水同产等特点,前人的井底静压折算公式不能达到生产所需的精度.根据大庆油田庆深气田在开发过程中的试采数据,预测气水同产井在关井过程中井底存在一定高度的液柱.根据井筒内天然气与水的流动特性,推导液柱高度的折算公式.将Cullender和Smith的井底静压公式与液柱产生的压力公式合并,最终得出深层天然气井井底静压折算的适用方法.对徐深7井KYC107Ⅰ层的井底静压进行折算,折算精度小于1MPa,此结果符合实际生产的需要.

关键词： 庆深气田;井底静压;气水同产;液柱高度

Abstract: The deep gas wells of Qingshen gas field in Daqing are characterized by the great well depth,high bottom temperature,high bottom pressure and gas production with water.The bottom hole pressure's reducing formula that predecessors had used cannot meet production's need.In view of the above situation,according to the pumping data developed from production of Daqing Oil Field,we predict that there is fluid column at the bottom of gas production well with water when the well is shut in.According to the flow behavior of gas and water in the bore hole,we finally confirm the fact that fluid column exists,and derive a formula for calculating the height of fluid column.We also arry on the suitable merge Cullender and Smith's bottom hole pressure formulation and pressure intensity caused by fluid column,finally obtain the suitable method for calculating the bottom hole pressure of deep gas well computation suitable method.The improved formula has been tested on Well Xushen-7's KYC107Ⅰlayer,and convert accuracy degrees are all smaller than 1 MPa.The result can conform to the actual production need.

Keywords: Qingshen gas field;static bottom-hole pressure;gas production with water;height of fluid column

基金项目: 黑龙江省研究生创新科研项目(YJSCX2007-0142HLJ)

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