元坝超深高含硫气井油套环空窜气综合治理技术

Comprehensive Control Technology of Ultra-Deep and High Sulfur Gas Wells with Sustained Annular Escape Gas in Yuanba

摘要: 元坝气田是迄今为止国内发现埋藏最深的海相气田，具有高温、高压、高含硫、地质条件复杂、含水、位于人口稠密地区的特点，属于典型的“三高”气田。气田投产以来，元坝1-1H井出现了油套环空窜气，影响了气井正常生产。针对环空窜气漏点诊断困难、环空保护液漏失等问题，现场实施了液面监测、超细碳酸钙堵漏、泄压–环空保护液加注、套管腐蚀速率监测等技术措施，形成了高含硫气井油套环空综合治理技术。并对含H2S套压异常井的环空治理方案提供了新思路，保障了气井的安全、平稳生产，也为国内外高含硫气井油套环空窜气治理提供了借鉴。

Abstract: Yuanba gas field is the deepest buried marine gas field found in China. It belongs to high tempera-ture, high pressure, high sulfur content, complex Geological conditions, water content, and located in densely populated areas. It is a typical “three high” gas field. Since the gas field was put into de-velopment, the Sustained Annular escape Gas was found in well of yuanba1-1H. It has affected the normal production of gas wells. In order to solve the problems of sustained annular escape gas and protection fluid leakage, technical measures such as liquid surface monitoring, superfine calcium carbonate plugging, pressure-sustained annular protection fluid filling, and casing corrosion rate monitoring were carried out on the spot to form a comprehensive management technology for sustained annular escape gas in high sulfur gas wells. It also provides a new idea for the cir-cumferential management scheme of the H2S sleeve pressure abnormal well, which guarantees the safety and smooth production of the gas well, and also provides a reference for the management of sustained annular escape gas of the high-sulfur gas well.