超深高含硫气藏完井管材优化与实践  

Optimization of Well Completion String for Ultra-deep Gas Reservoir with High Sulfur Content

作　　者：史雪枝[1] 周小虎[1] 乔智国[1] 

机构地区：[1]中国石化西南油气分公司石油工程技术研究院

出　　处：《石油机械》2016年第8期11-14,共4页China Petroleum Machinery

基　　金：国家科技重大专项"低渗油气田完井关键技术"(2011ZX05022-006)

摘　　要：为了缓解元坝气田完井安全性和经济性的矛盾,介绍了元坝气田在选材过程中开展的国产镍基合金油套管、电镀钨合金衬管和钛合金油管等不同材料的性能评价以及现场的应用情况。研究认为,通过适用性设计及系统试验评价,形成不同深度镍基合金材质的优化组合,并大规模应用国产材料,是超深高含硫气藏实现安全经济完井的一项重要途径。电镀钨合金管抗腐蚀性能优异,需对镀层厚度优化设计并优选上扣管钳钳牙,对于不作为油气泄漏屏障的衬管可满足使用要求。钛合金油管抗腐蚀性能优异,力学和整管性能满足标准对同钢级碳钢油管性能的要求,气密封性能优异,质量约为镍基合金的60%,在降低完井成本的同时可提高管柱的安全系数,有望替代传统的镍基合金油管。研究结果可为超深高含硫气藏完井管材的选用提供参考。To address the completion contradiction of safety and economy of Yuanba gas field and reduce well construction costs,this paper introduces the performance evaluation and field application of domestic nickel-based alloy casing and tubing,electroplating tungsten alloy liner and titanium alloy tubing during material selection for Yuanba gas field. Studies results suggested that,by feasibility design and system test evaluation,the optimal combination of nickel-based alloy with different depths and large-scale application of domestic materials is a critical way for ultra-deep gas reservoir with high sulfur content to achieve safe and economic completions. The plated tungsten alloy tube is excellent in corrosion resistance,and could meet the requirements for no-barrier liner with the optimization of coating thickness and selection of clamp jaw for pipe tong. Titanium alloy tubing,with the mass of about 60% nickel-based alloy tubing,is excellent both in corrosion resistance and gas sealing performance. Its mechanical property and the entire pipe performance could meet the standards for the carbon steel tubing with same grade. Thus,the titanium alloy tubing could reduce costs while increasing completion safety coefficient,presenting the potential of alternative for conventional nickel-based alloy tubing.

关 键 词：镍基合金 电镀钨合金衬管 钛合金油管 完井 高含硫 腐蚀 元坝气田 

分 类 号：TE925[石油与天然气工程—石油机械设备]