辽东湾北部工程地质条件评价

发布时间：2018-04-01 20:29

本文选题：辽东湾北部　切入点：工程适宜性　出处：《国家海洋局第一海洋研究所》2014年硕士论文

【摘要】：辽东湾北部具有良好的油气开发前景，是我国第三大油田大力开发的海域油气资源区。然而海上油气的勘探开发是一项投资高风险高的工程。辽东湾北部处于双台子河等河流入海区域，受海陆互相作用影响具有多种灾害性地质，对该海域的勘探开发具有不同等级的影响。因此对该海域进行工程地质条件评价具有很高的实际价值。本文在收集整理辽东湾北部地质和地球物理资料的基础上，概括总结了该区域内存在的灾害地质类型，并采用层次分析法和模糊数学法对灾害地质进行了定量化分析，按照系统性原则、客观性原则、可操作性原则、主导性原则建立了以地震烈度、埋藏古河道、浅层气、地层承载力和海底侵蚀为评价指标的风险评价体系，并赋予评价指标不同权值，根据最大隶属度原则计算得出海域内的不同区块的风险性等级。评价结果与辽东湾北部区域已知的地质灾害分布特点相符，说明该评价方法具有合理性和可行性，对于今后的海域开发工作具有一定的参考价值。根据对辽东湾北部区块的风险性评价结果可知该区域大部分区块工程地质条件良好，高风险区即工程地质条件不良区域的分布主要受埋藏古河道和浅层气影响，，在河口等较高风险区需要注意灾害性地质的防范工作。
[Abstract]:The northern part of Liaodong Bay has good prospects for oil and gas development. The exploration and development of offshore oil and gas is a project with high investment and high risk. The northern part of Liaodong Bay is located in the area of Shuangtaizi River and other rivers entering the sea. There are many kinds of disastrous geology affected by the interaction between sea and land, which have different effects on the exploration and development of the sea area. Therefore, it is of great practical value to evaluate the engineering geological conditions of the sea area. On the basis of collecting and arranging geological and geophysical data of northern Liaodong Bay, the types of disaster geology in this area are summarized, and the quantitative analysis of disaster geology is carried out by using analytic hierarchy process (AHP) and fuzzy mathematics method. According to the systematic principle, objectivity principle, maneuverability principle and leading principle, the risk evaluation system is established with seismic intensity, buried ancient river course, shallow gas, bearing capacity of stratum and undersea erosion as evaluation indexes. According to the principle of maximum membership degree, the risk grades of different blocks in the sea area are calculated. The evaluation results are consistent with the known distribution characteristics of geological hazards in the northern part of Liaodong Bay. It shows that the evaluation method is reasonable and feasible, and has certain reference value for the future development of sea area. According to the results of risk assessment in the northern part of Liaodong Bay, the engineering geological conditions of most blocks in this area are good, and the distribution of the high risk area, that is, the region with poor engineering geological conditions, is mainly affected by buried paleochannel and shallow gas. Attention should be paid to the prevention of disastrous geology in high risk areas such as estuaries.
【学位授予单位】：国家海洋局第一海洋研究所
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P642;P744.4

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