陇东地区延长统油藏测压技术

针对陇东地区延长统油藏尾管测试、环空测试、起泵测试等常规测试工艺存在关井测压占井时间长、对产量影响严重、曲线不完整的缺点,开展了井下关井测压技术试验。介绍了井下关井测压管串结构、工具和仪器选型、施工过程。2004年在西峰油田5口井进行了现场测试。实践表明,井下关井测试工艺可减少因长期关井造成的产量损失,且工艺简单、易操作、成本较低,可获得较高的经济效益;可大幅度削减井筒储存效应的影响,测试资料在较短的时间内可出现径向流段或边界反映,试井分析解释的地层压力、表皮因子等参数的准确度得到了进一步提高,为油田的高效开发提供了可靠依据。

Test Pressure Technique of Yanchang Epoch Reservoir in Longdong Region

Natural test technicses,such as liner logging,annulus logging and pump pull out logging,have a lot of limitation in yanchang epoch reservoir.Natural test ways have long close well time, affect yield of well,test curve isn't integrity,so we enhance the development monitors in the case of close well.Downhole pipe string structure,tool of test pressure and instrument chosing type and the operating processWere introduced.Field test 5 wells in Xifeng Oilfield in 2004, practices show that test technicses in downhole close well can reduce output losing owing to long-term close well,and it's technologies simple, operating easier,cost lower and have a higheconomic benefit,it also can reduce wellbore storage effect.Test data show radial drainage area and boundary reflection at short time,the precision of well test interpretative on skin factor and formation pressure was increased,it could provide reliable data for oilfield devolopment.