南海西部高温高压井精准卡层关键技术体系构建及应用
The key technology system construction and application for accurate horizon prediction of HTHP wells in the Western South China Sea
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- 引用格式:
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郭书生,王世越,彭志春,柳泽旭,秦瑞.南海西部高温高压井精准卡层关键技术体系构建及应用[J].天然气与石油,2024,42(6):121-127.doi:10.3969/j.issn.1006-5539.2024.06.014
GUO Shusheng, WANG Shiyue, PENG Zhichun, LIU Zexu, QIN Rui.The key technology system construction and application for accurate horizon prediction of HTHP wells in the Western South China Sea[J].Natural Gas and Oil,2024,42(6):121-127.doi:10.3969/j.issn.1006-5539.2024.06.014
- DOI:
- 10.3969/j.issn.1006-5539.2024.06.014
- 作者:
- 郭书生1,2,3 王世越1,2 彭志春1,2 柳泽旭1 秦瑞4
GUO Shusheng1,2,3, WANG Shiyue1,2, PENG Zhichun1,2, LIU Zexu1, QIN Rui4
- 作者单位:
- 1. 中海石油(中国)有限公司海南分公司, 海南 海口 570100; 2. 海南省深海深层能源工程重点实验室, 海南 海口 570100; 3. 中国海油南海油气能源院士工作站, 海南 海口 570100; 4. 海油发展(澄迈)能源技术有限公司, 海南 海口 570312
1. CNOOC China Ltd., Hainan Branch, Haikou, Hainan, 570100, China; 2. Key Laboratory of Deep Sea Deep Formation Energy Engineering of Hainan Province, Haikou, Hainan, 570100, China; 3. CNOOC South China Sea Oil & Gas Energy Academician Workstation, Haikou, Hainan, 570100, China; 4. CenerTech Chengmai Energy Technology Co., Ltd., Haikou, Hainan, 570312, China
- 关键词:
- 莺琼盆地;高温高压;随钻声波;垂直地震剖面;随钻电阻率前视;精准卡层
Yinggehai-Qiongdongnan Basin; HTHP; Sonic logging while drilling; Vertical seismic profile; IriSphere; Accurate horizon prediction
- 摘要:
南海西部莺琼盆地是世界三大海上高温高压区域之一,勘探作业面临地层高温高压以及异常压力导致的钻井安全压力窗口窄的难题,实现安全钻探的必要条件之一即要实现精准卡层,进而将套管下至合适位置,保证充足的安全压力窗口钻进至目的层段。深度、压力预测的常规手段是利用邻井的时深关系和地层对比,但预测精度低、分辨率差同时也无法解决地层横向非均质性的问题。为解决以上问题,在现有技术基础上系统开展了高温高压探井精准卡层关键技术研究,总结了一套基于常规随钻声波测井、垂直地震剖面测井和随钻电阻率前视测井技术的高温高压井精准卡层关键技术体系,为高温高压井合理优化井身结构提供了有力的技术支持,地质目的完成率和作业时效显著提升,释放高温高压勘探作业的成本压力,推动了南海西部高温高压勘探作业安全顺利实施。研究成果可为高温高压井钻探过程中准确预测目的层深度提供技术参考。
The Yinggehai-Qiongdongnan Basin in the Western South China Sea is one of the three major high-temperature high-pressure (HTHP) marine areas in the world. Exploration operations in this area face challenges such as high formation temperatures, high pressures, and abnormal pressures, which result in a narrow drilling safety pressure window. One of the necessary conditions for safe drilling is the precise prediction of target depth and formation pressure. This allows for the proper placement of casing, ensuring sufficient safety pressure window to drill into the target interval. At present, the conventional methods for depth and pressure prediction are based on the time-depth relationship and formation correlation of adjacent wells. However, these methods suffer from low accuracy and poor resolution and cannot address the issue of lateral heterogeneity in the formation. To overcome these challenges, key technologies for accurate depth and pressure prediction in HTHP exploration wells have been systematically developed based on existing technologies in the Western South China Sea. A set of key technological systems, based on Conventional Sonic Logging While Drilling, Vertical Seismic Profile (VSP) Logging, and IriSphere Look-Ahead-While-Drilling Service, has been summarized. These provide robust technical support for the optimization of wellbore structure of HTHP wells, significantly improving the geological completion rate and operational efficiency, reducing the cost pressure of HTHP exploration operations, and promoting the safe and smooth implementation of HTHP exploration operations in the Western South China Sea. The research results provide technical references for accurate prediction of target layer depths during the drilling of HPHT wells.
