基于压力恢复测试的气井油套环空泄漏程度评价

发布时间：2018-06-24 20:23

本文选题：“三高”气井 + 压力恢复测试　；参考：《特种油气藏》2017年01期

【摘要】："三高"(高温、高压、高产)气井在开发过程中越来越多地出现环空带压问题,环空带压预示着井筒发生泄漏,井筒完整性受到削弱,威胁气井安全生产。气井井筒完整性失效最根本的原因就是管柱发生泄漏。在借鉴已有研究成果的基础上,利用平衡原理,计算环空泄漏点深度;基于环空压力现场诊断测试曲线,建立了一种环空泄漏程度评估方法。该方法通过拟合现场实测数据,可预测环空压力的发展趋势,评价环空井筒泄漏的速度和泄漏点的等效直径。该方法对环空异常带压的诊断评估、环空压力的控制具有重要意义。
[Abstract]:"Three high" (high temperature, high pressure, high yield) gas wells appear more and more in the process of development, the annular band pressure indicates the leakage of the wellbore, the wellbore integrity is weakened, and the gas well is threatened safely. The most fundamental reason for the failure of the wellbore integrity is the leakage of the pipe column. Based on the existing research results, Using the equilibrium principle to calculate the depth of the leakage point of the annular space, based on the test curve of the annular pressure field, a method of evaluating the leakage degree of the annular space is established. By fitting the field measured data, the development trend of the annular pressure can be predicted and the velocity of the leakage of the annular shaft and the equivalent diameter of the leakage point are evaluated. The control of annulus pressure is of great significance in the diagnosis and evaluation of pressure.
【作者单位】：中国石油西南油气田分公司;西南石油大学;
【基金】：国家自然科学基金项目“H2S/CO2溶解度测试、预测及其与油套管完整性的相关性研究”(51274170) 中国石油西南油气田分公司博士后科研项目“龙王庙高温高压大产量气井完整性的管柱力学研究”(20140305-11)
【分类号】：TE375

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