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基于“四元致险”模型的地震导向钻井地质漏失风险层预测方法
陈帅, 袁三一, 袁俊亮, 丁智强, 许言午
1 中国石油大学(北京)油气资源与工程全国重点实验室,北京 102249 2 中海油研究总院有限责任公司,北京 100029
Seismic-guided prediction of geological lost circulation risk zones based on a “four-element hazard” model
CHEN Shuai, YUAN Sanyi, YUAN Junliang, DING Zhiqiang, XU Yanwu, JIANG Zhenxue, TANG Xianglu
1 State Key Laboratory of Petroleum Resources and Engineering, China University of Petroleum, Beijing 102249, China 2 CNOOC Research Institute Ltd., Beijing 100029, China

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摘要  钻井漏失作为钻井工程中最常见的复杂与事故类型之一,其精准预测对保障油气资源的安全高效勘探开发具有重要意义。然而,传统漏失风险预测方法依赖历史钻测井数据与经验分析,欠缺对地质构造特征等关键地质风险要素的考虑,存在预测滞后性与空间局限性,难以满足复杂地层钻前预测需求。针对上述问题,本文提出基于“四元致险”模型的地震导向钻井地质漏失风险预测方法。基于海上钻井典型区块的跨尺度数据,融合测井、钻井与三维地震信息,从地质统计与典型井分析入手,系统揭示了断裂带、火山通道、岩性突变界面与异常高压地层 4 类主控致险因素,构建了“四元致险”模型框架。进一步以地震信息为主导,融合测井与钻井数据的约束机制,提取多源敏感地震属性,建立四类风险体的识别方法,即通过多属性贝叶斯融合建立断裂带风险概率模型,振幅-方差联合分析识别火山通道边界,响应特征优选构建岩性界面敏感属性集,结合孔隙压力反演实现异常高压层预测。渤海A区和南海B区的实际应用表明,多口钻井钻前漏失风险预测与实际钻井过程中的风险事故吻合率较高,其中成功预测渤海H1 井 80%漏失层位,包括多个复合成因的漏失层,瞬时漏速达 90 m³/h,验证了该模型对复杂地层钻井风险的前瞻有效预测能力。总之,研究成果构建了一套面向复杂构造区的地震导向的三维钻前漏失地质风险综合识别流程,为井位部署、轨迹设计与钻井安全管理提供关键支撑。
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关键词 : 钻井漏失,地震导向钻井,四元致险模型,地震属性,钻前预测,地质体识别
Abstract

Lost circulation is one of the most frequent and hazardous complications in drilling operations, and its accurate prediction plays a vital role in ensuring the safe and efficient exploration and development of hydrocarbon resources. However, conventional prediction methods largely rely on historical drilling and logging data combined with empirical analyses, while often neglecting critical geological risk elements such as structural features. These methods suffer from delayed predictions and limited spatial applicability, making them insufficient for pre-drilling risk assessment in complex geological environments. To address these challenges, this study proposes a seismic-guided prediction method for geological lost circulation risks based on a “four-element hazard” (FEH) model. Utilizing multi-scale data from representative offshore drilling blocks, the method integrates well-logging data, drilling parameters, and 3D seismic information. Through geological statistics and analysis of typical well sections, four major geological factors are identified as the primary triggers for lost circulation: fault zones, volcanic conduits, lithologic discontinuities, and abnormally overpressured formations. These factors form the foundation of the FEH model framework. Guided primarily by seismic data and constrained by well and drilling information, the method extracts multi-source sensitive seismic attributes to establish identification workflows for each of the four risk types. Specifically, a multi-attribute Bayesian fusion model is used to estimate fault-related risk probabilities; joint amplitude-variance analysis delineates the boundaries of volcanic conduits; lithologic interface indicators are optimized based on response features; and abnormal overpressure zones are predicted by integrating seismic velocity and pore pressure inversion. Field applications in the Bohai A Block and South China Sea B Block demonstrate strong consistency between predicted risk zones and actual lost circulation events. In particular, the model successfully forecasted 80% of the loss intervals in the Bohai H1 well, including several composite-origin zones, with a maximum instantaneous loss rate of 90 m³/h. These results validate the model’s capability for forward-looking and effective risk prediction in structurally complex formations. In summary, this research develops a three-dimensional, seismic-guided, pre-drilling risk identification workflow targeting structurally complex zones. The method provides essential technical support for well placement optimization, trajectory design, and proactive drilling risk management.

Key words: lost circulation; seismic-guided drilling; four-element hazard model; seismic attributes; pre-drilling prediction; geological body identification
收稿日期: 2025-06-13     
PACS:    
基金资助:国家自然科学基金“融合岩石物理- 钻井信息的海上深层钻井风险识别方法研究”(U24B2031) 资助
通讯作者: yuansy@cup.edu.cn
引用本文:   
陈帅, 袁三一, 袁俊亮, 丁智强, 许言午. 基于“四元致险”模型的地震导向钻井地质漏失风险层预测方法. 石油科学通报, 2025, 10(03): 478-495 CHEN Shuai, YUAN Sanyi, YUAN Junliang, DING Zhiqiang, XU Yanwu, JIANG Zhenxue, TANG Xianglu. Seismic-guided prediction of geological lost circulation risk zones based on a “four-element hazard” model. Petroleum Science Bulletin, 2025, 10(03): 478-495.
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