PREDICTION AND CONTROL TECHNOLOGY OF SHALLOW GEOLOGICAL HAZARDS IN DEEPWATER AREA
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摘要: 浅层气、浅层流和天然气水合物等地质灾害是深水钻井过程中面临的主要技术挑战,做好深水浅层地质灾害预测能够为钻井设计和施工提供可靠的科学依据和技术保障。根据南海荔湾深水海域海底浅层地震资料建立了浅层地质灾害预测模板。针对浅层气和浅层流的特点,建立了一套现场钻井施工过程中的监测方法,形成了一套浅层气和浅层流地质灾害现场控制技术。Abstract: Geological hazards, such as the shallow gas, shallow flow and natural gas hydrate, are the major technical challenges being confronted in the operation of deepwater drilling. Accurate prediction of deepwater shallow geological hazards will provide a scientific basis and technical support for well drilling design and construction. Based on the sub-bottom seismic data from the deepwater area of the South China Sea, we established a shallow geologic hazards prediction model in this paper. According to the characteristics of shallow gas and shallow flow, a monitoring method was proposed to monitor the geohazard during the drilling process and an on-the-spot control technology on the shallow gas and shallow flow induced geological disasters was established. The prediction, monitoring and testing methods and control techniques will protect the offshore construction from the shallow geological hardads, and provide technical support for safe construction in deepwater areas.
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Key words:
- deepwater /
- shallow layer /
- geologic hazard /
- prediction
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