元坝含硫气井环空带压诊断方法与治理措施

Diagnostic Method and Treatment Measures of Sulfur Gas Wells with Sustained Annular Pressure in Yuanba Gas Field

摘要: 环空带压现象在国内外高压气井中普遍存在，特别是高含H₂S气井如果环空出现了异常压力，会影响到气井的安全生产，需要对气井环空异常压力进行诊断与治理。元坝长兴组属于高含H₂S，中含CO₂储层。本文结合元坝含硫气井的现场经验，对环空异常压力的诊断及判别方法进行了改进，并对含H₂S套压异常井的环空保护液加注治理方案提供了新思路，以保障气井的安全、稳定生产，也为国内外环空带压气井的诊断与治理提供借鉴。

Abstract: Annulus pressure is a common phenomenon in high pressure gas well at home and abroad, especially in wells with high H₂S content if the annulus appeared abnormal pressure, safety production will affect the gas well and need diagnosis and treatment. The Changxing formation in Yuanba belongs to high H₂S and medium CO₂ reservoir. Based on the field experience of Yuanba, the diagnosis methods of abnormal pressure in annulus are improved, and a new idea for the treatment of annulus filling fluid with H₂S casing pressure abnormal well is put forward. This ensures the safety and stable production of gas wells, and provides reference for the diagnosis and treatment of gas wells with annulus at home and abroad.