第38参第6期 2016年11月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2016)06078704
DOI: 10.13639/j.odpt.2016.06.014
Vol. 38 No. 6 Nov.2016
高温高压高含硫气井固井水泥环封隔能力评价技术
武治强刘书杰联亚椭岳家平周建良
中海油研究总院
引用格式：武治强，刘书杰，联亚勃，岳家平，周建良.高温高压高含硫气并固井水泥环封隔能力评价技术[J］.石油钻采工艺,2016,38(6)：787-790
摘要：随着中海油海上及海外复杂油气图大力开发，高温高压高含硫并开采数量不断增多，固井水泥环封隔性能失效引起的环空带压或股性气体泄漏同题，已经成为制的高温高压高含疏气田安全作业和生产的瓶颈。从分析固并水泥环对隔能力影响固素、失效机理等方面出发，总结了高温高压高含硫固并水泥环对隔能力失效的主要原因，分析认为在高温高压高含硫条件下水泥石力学性能和结构变化是影响水泥环对隔能力的重要图素之一；结合高温高压高含硫井特点，设计了固井水泥环对隔能力评价思路，建立了固并水泥环层间对隔能力评价方法，提出了改善水泥环长期对隔能力的技术指施，为提高高温高压高含硫图并水泥环密时完整特性和延长油气并生产寿命，提供了新的工程技术发展方向与解决途径。
关键词：高温高压高含硫井；固井；水泥环；封隔能力；评价技术
中图分类号：TE256
文献标识码：A
Evaluation technology for isolation capacity of cement sheath in HTHP high-sulfurgas wells
WU Zhiqiang, LIU Shujie, GENG Ya'nan, YUE Jiaping, ZHOU Jianliang
CNOOC Research Institute, Bejing 100028, Chind
Citation: WU Zhiqiang, LIU Shujie, GENG Ya'nan, YUE Jiaping, ZHOU Jianliang. Evaluation technology for isolation capacity of cement sheath in HTHP high-sulfur gas wells L J J . Oil Drilling & Production Technology, 2016, 38(6): 787-790
Abstract: As CNOOC develops offshore and overseas complex oil and gas fields vigorously, there are more and more HTHP (high temperature and high pressure) high-sulfur wells. And the annulus pressure or acidic gas leakage caused by the isolation failure of cement sheath is the bottle neck which restricts the safe operation and production of HTHP high-sulfur gas fields. In this paper, the main reasons for the isolation failure of cement sheath in HTHP high-sulfur wells were analyzed from the aspects of influence factors and failure mechanisms. It is indicated that the mechanical and structural change of set cement is one of the main factors influencing the isolation capacity of cement sheath under high temperature, high pressure and high sulfur. Then, based on the characteristics of HTHP high-sulfur wells, the evaluation idea on the isolation capacity of cement sheath was proposed, the evaluation method on the interlayer isolation capacity of cement sheath was established, and the technical measures to improve long-term isolation capacity of cement sheath were developed. In this way, it provides the new technical development direction and solution for improving the isolation integrity of cement sheath in HTHP high-sulfur wells and prolonging the service life of oil and gas wells.
Key words: HTHP high-sulfur well; cementing; cement sheath; isolation capacity; evaluation technology
随着海上及海外油气勘探开发的不断深入，高温高压高含硫井钻探数量日益增多，固并后环空带压和酸性气体泄漏等间题也日渐突出。这些复杂间
题一且发生，补救措施成本高、风险大，处置不当会危及人员和平台安全，并引起巨大的经济损失和人员伤亡。如何确保固并水泥环在高温高压高含硫环
基金项目：国家科技重大专项子课题“海上沟气并压力究整性及寿命评估技术研究"（编号：2011ZX05024-003-04)。
第一作者：式治强(1985-),2011年毕业于西南石沟大学油气并工程专业，现主要从事海上钻并工程设计和研究工作。通讯地址：(100028）
北京市朝阳区太阳宫南街6号院中海油大厦。电语；010-84526769。E-mail:wuzhq2@cnooc.com.cn
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