Application of Direct-Push Storage Logging Technology in the Northwest Oilfield
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摘要: 西北油田碳酸盐岩油气藏钻遇放空漏失或溢流的情况较多，从施工安全角度考虑，无法进行常规电缆测井；因井深及硫化氢含量高，部分斜井或水平井中钻具与套管环空间隙过小，无法进行电缆钻具输送测井。为了解决西北油田复杂环境下取全测井资料困难的问题，引进了一种无电缆、免对接的直推式存储测井工艺。介绍了直推式存储测井系统组成和主要技术指标，分析了其工艺特点。顺北、塔河及部分外围区块应用结果表明：直推式存储测井工艺的安全性、可靠性更高，可缩短测井占用井口的时间，大幅提高完井效率；在井况复杂或存在井控风险的井中，能够保证井下仪器的使用安全和井口安全，取全测井资料，且目的层测井资料获取率大幅提高（如顺北区块目的层测井资料获取率从31.25%提高至90.91%）。研究表明，直推式存储测井工艺取得的测井资料真实、可靠，可以满足储层评价需求，值得推广应用。Abstract: Conventional wireline logging cannot be carried out safely in the Northwest Oilfield due to lost circulation or overflow which often occurs in carbonate reservoirs. Because of well depth and high hydrogen sulfide content, as well as the small space between casing and drilling string in some inclined or horizontal wells, it is impossible to carry out wireline logging. To solve the difficulties in acquiring full logging data in complex environments of Northwest Oilfield, a new direct-push storage logging technology free of cables and docking was introduced. Further, introductions of the components, main technical indexes of this logging system were made, and the its technological characteristics were analyzed. Practical applications in Shunbei, Tahe and some peripheral blocks confirmed its higher safety and reliability, and it could shorten the time of occupying wellhead for logging and greatly improve completion efficiency. Besides, this new technology allows one to acquire full logging data while ensuring the safe service of downhole instruments and wellhead safety under complex well conditions or in wells with risks in well control. The acquisition rate of logging data in the target layers was significantly improved, for example, that of the Shunbei area was improved from 31.25% to 90.91%. The research results showed that the direct-push storage logging technology could acquire accurate and reliable data, and could meet the needs of reservoir evaluation, making it worthy of popularization and application.
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Keywords:
- direct-push logging /
- storage logging /
- logging system /
- logging technology /
- leakage /
- overflow /
- Northwest Oilfield
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图 3 TH10443X井奥陶系部分井段测井资料
Figure 3. Logging data of some sections in Ordovician in the Well TH10443X
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图 4 玉中2井奥陶系蓬莱坝组综合解释成果
Figure 4. Comprehensive interpretation of the Ordovician Penglaiba Formation in the Well Yuzhong-2
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图 5 顺北55X井奥陶系鹰山组部分井段综合解释成果
Figure 5. Comprehensive interpretation of some well sections in the Ordovician Yingshan Formation in the Well Shunbei-55X
表 1 直推式存储测井工艺与其他测井工艺的特点对比
Table 1 Comparison of the characteristics of direct-push storage logging technology with other logging Technologies
测井工艺 影响因素 抗拉压强度 测井方式 测井项目 测井质量 井控风险 电缆钻具输
送测井钻井液杂质、湿接头工具、电缆、电路稳定性 抗拉≤77.0 kN
抗压≤18.0 kN上测/
下测常规+能谱+成像类、井径≤120.7 mm无法施工 高 需耗时抢装工具剪断电缆压井 泵出式存储
测井保护套悬挂、投球泵出、电路稳定性 抗拉≤68.0 kN
抗压≤18.0 kN上测 常规 中 泵出前后可随时循环压井 直推式存储
测井电路稳定性 抗拉≤167.0 kN
抗压≤49.9 kN上测/
下测常规+能谱+偶极子 高 随时循环压井 
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表 2 井深8 000.00 m、测量井段500.00 m条件下不同测井工艺测井用时对比
Table 2 Comparison of logging time at depth of 8,000.00 m and logging section of 500.00 m with different logging technologies
测井工艺 各阶段用时/h 测井总用时/h 仪器组装 下钻 起钻 循环顶通 投球释放 对接及导向 裸眼测井 电缆钻具输送测井 ≥2 ≥26 ≥20 ≥4 0 ≥4 ≥4.0 ≥60 泵出式存储测井 ≥4 ≥20 ≥20 ≥4 ≥1.5 0 ≥3.5 ≥53 直推式存储测井 ≥2 ≥20 ≥20 正常灌浆 0 0 ≥4.0 ≥46
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