Cementing Discussion Topic 汇报内容
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How to achieve zonal isolation? 提高固井质量的几个要素 Channel Seal Channel Seal体系
CO2STOP Slurry CO2STOP体系
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HPHT Slurry 高温高压水泥浆 Cement Assurance Tool & Swell Packer 固井保障工具和油气膨胀封隔器
屈服值低于20
• Gel-strength Development of Less Than 25 lb/100 ft2 (122 kg/m2) Over Three Days 3天以上凝胶强度发展低于25 lb/100 ft2 (122 kg/m2) • Fluid Loss Not Exceeding 10 cc On API Lowpressure Test API低压试验失水不超过10cc
下部井段使用合成基ChannelSeal™
• Use Water-Based ChannelSeal™ as a Lead Slurry Use 使用水基ChannelSeal作为领浆 • Extended Gel-Time Cement Slurry 凝结时间延长的水泥浆
CBL with Synthetic Based ChannelSealTM 合成基ChannelSeal CBL测井结果
• 下套管前注入 • 下套管和固井 • 容易顶替，即便窜槽 也能封固 • 性能
– 55°F (10°C) to 300°F (175°C) – BHP of 12,500 psi (highest tested)
• No Spacer Is Needed For Separating the ChannelSeal™ Fluid From the Cement Slurry Or Improving Mud Displacement
CO2STOP Slurry CO2STOP体系
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HPHT Slurry 高温高压水泥浆 Cement Assurance Tool & Swell Packer 固井保障工具和油气膨胀封隔器
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How to achieve zone isolation? 提高固井质量的几个要素
•• Mud Conditioning Mud Conditioning 处理好泥浆 处理好泥浆 •• Mechanical Aids机械辅助 Mechanical Aids机械辅助 – Pipe Movement – Pipe Movement 活动管柱 活动管柱 – High Port Up-Jet Float Shoe – High Port Up-Jet Float Shoe 向上喷射式浮鞋 向上喷射式浮鞋 •• Centralization Centralization 套管居中 套管居中 •• Fluid Velocity Fluid Velocity 流速 流速 •• Spacers & Flushes Spacers & Flushes 隔离液及清洗 隔离液及清洗
100 75
% Success
50
25 0 0 0.5 1.0 1.5 2.0 2.5
3.0
Annular Clearance (in.)
(From Rike, SPE 12903, 1984)
Mud
Cement
Cementing Discussion Topic 汇报内容
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How to achieve zonal isolation? 提高固井质量的几个要素 Channel Seal Channel Seal体系
• Placed In Well Prior To Running Casing • Casing Installed and Cemented • Easily Displaced But Will Set If By-passed • Performance Range
• 55°F (10°C) to 300°F (175°C) • BHP of 12,500 psi (highest tested)
井参数
• 井深11,233英尺，井斜 90° • 上层套管－7″，下深 9,814英尺，井斜19.5° • 井眼尺寸－ 7″，用6in.× 7-in偏心钻头钻进 • 井底温度187°F • 合成基，密度 11.35lb/gal
Nigerian Job Design
尼日利亚设计
• Use Synthetic-Based ChannelSeal™ Over the Lower Interval
集团公司固井技术研讨会
2007年10月17日-19日 天津塘沽
哈里伯顿固井工艺与固井新工具
针对
高压酸性气井、高压气井、 超深井、小间隙井 集团公司 以及特殊结构井等复杂疑难井 的固井质量问题
KK Chong 远东高级技术经理
Cementing Discussion Topic 汇报内容
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How to achieve zonal isolation? 提高固井质量的几个要素 Channel Seal Channel Seal体系
CO2 + H2O = Carbonic acid 碳酸
Carbonic acid + Portland cement = no cement 碳酸 ＋ 普通水泥 ＝ 无水泥
A Phenomena That Has Been Well Documented 在相关文献中陈述的现象
• • • SPE/IADC 18618 - Effects of CO2 Attack on Cement in HighTemperature Applications SPE 15176 - Carbon Dioxide Corrosion in Oilwell Cements “Natural CO2 – Rich Steam Heated Waters in the BroadlandsOhaaki Geothermal System, New Zealand: Their Corrosive Nature” Geothermal Resources Council, Transactions. Vol 10, pp. 75-79 Sep, 1986 SINTEF Petroleum Research Mid-term report June 2002: The Long Term Sealing Capacity of Cemented Petroleum wells in a CO2 Storage Project
• ChannelSeal™和水 泥浆之间不需要隔离 液
ChannelSeal Vs. Conventional Means ChannelSeal与常规方法 对比
• ChannelSeal Placed During Drilling Process with Drill String In Hole –随钻具注入
Deviation = 61°
Deviation = 81°
When Do I Recommend the ChannelSealTM Process? 推荐使用条件
– When Displacement Rates Are Low Due To Tight ECD‘s 需要严格控制ECD时，要降低顶替速度时 – When Zonal Isolation Is Critical 对固井质量要求高时 – When the Shoe Test Is Critical 套管鞋测试要求严格时 – In Highly Deviated Wellbores When Low Side Channeling Is A Concern 大斜度井中低边窜槽时 – When Casing Is Poorly Centralized 套管居中不好时 – When It Is Difficult To Reciprocate or Rotate the Casing String During Displacement 顶替困难或顶替过程需要转动套管时
Mud Conditioning 泥浆处理
LOW MOBILITY MUD MOBILE MUD
FILTRATE
FILTRATE
CEMENT
FILTER CAKE CASING
FORMATION
Comparison of Annular Clearance to Primary Cementing Success 环空间隙对固井质量的影响
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Chemical Reactions 化学反映
Reactions Involved
相关化学反映
CO2 + H2O → H2CO3 H2CO3 + C-S-H → silica gel + CaCO3 H2CO3 + Ca(OH)2 → CaCO3 + 2H2O H2CO3 + CaCO3 → Ca(HCO3)2
– Higher Annular Velocities Around BHA高环空返速 – Lower Gel Strength of Mud低切力 – Mud Easier To Mobilize and Displacement泥浆易于流动和顶替
• Conventional Cement Job / Casing in Hole 常规固井/下套管
Case Histories – Expandable Casing 案例－可膨胀尾管
• To Date (1/2003) Wit Jobs on Expandables 随膨胀尾管完成41项Channel Seal作业 – Synthetic Oil and Oil-Based 合成油及油基 – Water-Based Systems 水基体系 – Shoe Integrity - 100% Successful Tests 套管鞋完整性－100％成功测试