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深水井涌压井方法及其适应性分析

ISSN号：1001-0890
期刊名称：石油钻探技术
时间：2011.3.3
页码：45-49
分类：TE28[石油与天然气工程—油气井工程]
作者机构：[1]中国石油大学华东石油工程学院,山东青岛266555
相关基金：国家自然科学基金项目“超临界二氧化碳在非常规油气藏中应用的基础研究”（编号：51034007）、“含天然气水合物相变的环空多相流动研究”（编号：50871116）、”深水钻井中的气液两相流传热规律研究”（编号：51004113）和山东省自然科学基金项目“深水井控井筒与管线内多相流动传热研究”（编号：ZR2009FQ005）联合资助
相关项目：深水钻井中的气液两相流传热规律研究

关键词：深水钻井, 井溢流, 井控, 压井, deepwater drilling , well overflow, well control, killing well

中文摘要：

深水井涌的处理与陆上相比存在3个难点：一是钻遇浅层流时还没有安装井口；二是节流管线细长且摩阻较大；三是安全密度窗口很窄。为此，在介绍司钻法、工程师法、动力压井法和附加流速法等压井方法的基础上，分析了其特点与主要流程及其对于深水井涌的适用性；并在此基础上，模拟了浅层气井涌和安全密度窗口较小情况下深水钻井井涌的压井工况。模拟结果表明：钻遇浅层流在没有安装井口情况下，可采用动力压井法实施压井作业；在处理窄安全密度窗口的深水井涌时，采用工程师法压井更合适，在模拟井工况下，采用工程师法套管鞋处的最大压力比采用司钻法低0．28MPa；如果安全密度窗口太窄，则要采用附加流速法压井，在模拟工况下，采用附加流速法套管鞋处的最大压力可比常规压井方法降低0．94MPa，但采用附加流速法对井口设备要求较高，并需要对施工参数进行优化。

英文摘要：

There are three difficulties in dealing with deepwater well kick compared with that in onshore. Wellhead has not been installed when drilling shallow formation;chock line is long,thin and friction al;the safety density window is narrow. Based on the introduction of well killing methods,such as the driller method, engineer method, dynamic well killing method, and additional velocity method, this paper analyzed the characteristic, main procedure and applicability of these methods for controlling deepwater well kicks. Well killing for well kick was simulated when drilling deepwater well in shallow formation with narrow safety density window. The simulation results show that when drilling shallow formation without well- head equipment,dynamic well killing method is effective. When dealing with deepwater well kicks with narrow safety window, engineer method has more advantages than driller method. Simulation shows that the maximum pressure at the casing shoe in engineer method is 0.28 MPa less than that of driller method. If the safety density window is too narrow, the additional velocity method is better. The maximum pressure at the casing shoe is 0.94 MPa lower than the conventional method. However,additional velocity method requires better wellhead equipment ,and needs optimization of operation parameters.

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