松原前扶油田开发区地下水脆弱性评价

发布时间：2018-09-04 08:48

【摘要】：前扶油田开发区是松原市的一个以石油工业为主的新兴经济开发区,地下水资源在油田开发过程中起着极为重要的作用。同时,地下水资源也是当地工农业发展和生活饮用的重要水源。近年来,由于油田区石油资源的开发和地下水的大量开采,地下水污染、区域水质恶化已成为该地区主要的环境问题。本文在对前扶油田开发区地质以及水文地质条件进行详细调查的基础上,结合目前地下水脆弱性分析理论和油田开发区的特点,对该区进行了地下水脆弱性分析。通过分析影响地下水固有脆弱性的因素,建立了地下水固有脆弱性评价指标体系。采用DRASTIC指标法和模糊综合评价法,综合评价了该区的地下水固有脆弱性。在模糊综合评价法中,采用层次分析法确定各评价指标的权重,进而利用MAPGIS编制了前扶油田开发区地下水脆弱性分区图。通过分地下水污染程度与地下水脆弱性之间的关系,对研究区地下水脆弱性进行综合性评价。研究结果表明,前扶油田区大部分地区属于地下水脆弱区和高脆弱区,较低脆弱区达到分布范围小；DRASTIC指标法和模糊综合评价法两种方法进行地下水脆弱性评价的结果基本一致,验证了本次地下水脆弱性分区的合理性。此次研究区地下水脆弱性评价的方法和结果,可为类似地区地下水脆弱性评价、地下水资源的合理开发与保护提供借鉴意义和实际指导。需要指出的是,在地下水脆弱性评价的过程中,若不考虑人类活动等特殊因素的影响,结果显示出的地下水脆弱性分区与污染现状程度分区不相对应,说明污染现状对地下水脆弱性影响已日愈显现。因此,污染程度也应作为地下水脆弱性评价的重要指标。
[Abstract]:Qianfu Oilfield Development Zone is a new economic development zone in Songyuan, which is dominated by petroleum industry. Groundwater resources play a very important role in oilfield development. At the same time, groundwater resources are also an important source of water for the development of local industry and agriculture and living and drinking. In recent years, because of the exploitation of oil resources and the exploitation of groundwater, groundwater pollution, regional water quality deterioration has become the main environmental problem in this area. Based on the detailed investigation of geological and hydrogeological conditions in Qianfu Oilfield Development Zone, combined with the current groundwater vulnerability analysis theory and the characteristics of oilfield development zone, the groundwater vulnerability analysis is carried out in this area. Based on the analysis of the factors affecting the inherent vulnerability of groundwater, the evaluation index system of the inherent vulnerability of groundwater is established. The inherent vulnerability of groundwater in this area was evaluated by DRASTIC index method and fuzzy comprehensive evaluation method. In the fuzzy comprehensive evaluation method, the weight of each evaluation index is determined by analytic hierarchy process (AHP), and then the zoning map of groundwater vulnerability in Qianfu oilfield development zone is compiled by using MAPGIS. Based on the relationship between groundwater pollution and groundwater vulnerability, the groundwater vulnerability in the study area was comprehensively evaluated. The results show that most of the areas in Qianfu Oilfield belong to the fragile area of groundwater and the area of high vulnerability, and the distribution range of the lower vulnerable area is small. The results of groundwater vulnerability assessment by DRASTIC index method and fuzzy comprehensive evaluation method are basically consistent, which verifies the rationality of groundwater vulnerability zoning. The methods and results of groundwater vulnerability assessment in this study area can provide reference and practical guidance for groundwater vulnerability assessment and reasonable development and protection of groundwater resources in similar areas. It should be pointed out that, in the process of groundwater vulnerability assessment, if special factors such as human activities are not taken into account, the results show that the groundwater vulnerability zoning does not correspond to the zoning of pollution status. The results show that the effect of pollution status on groundwater vulnerability has become more and more obvious. Therefore, the degree of pollution should also be regarded as an important indicator of groundwater vulnerability assessment.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P641.8

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