新疆石油地质

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (3): 300-303.

• 应用技术 • 上一篇    下一篇

地理信息系统的证据权法在油气资源评价中的应用

李勃, 张廷山   

  1. 西南石油 大学 资源与环境学院,成都 610500
  • 收稿日期:2009-10-23 发布日期:2020-09-17
  • 作者简介:李勃(1981-),男,山东威海人,硕士,石油地质,(Tel)13540825036(E-mail)libralibo@126.com.

Application of GIS-Based Evidence Weight Method to Appraisement of Hydrocarbon Resource Potential

LI Bo, ZHANG Ting-shan   

  1. Institute of Resources and Environment, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • Received:2009-10-23 Published:2020-09-17

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摘要： 以贝叶斯条件概率为基础的证据权法模型是基于地理信息系统的油气资源评价的常用方法之一,在分析塔里木盆地库车坳陷天然气成藏条件的基础上,首先在该系统中建立了烃源层、盖层、储集层、断层和压力等7 个地质证据图层,然后用证据权重模型结合该系统的叠置分析功能,计算出各证据图层的权重参数并进行独立性检验,最后生成研究区天然气资源勘探潜力的后验概率图,按照后验概率相对大小把预测区成藏可能性划分成Ⅳ级,将Ⅱ级以上分区定为天然气成藏有利靶区,从而为库车坳陷进一步勘探提供决策支持。

关键词: 油气地质异常, 地理信息系统, 叠置分析, 证据权法, 库车坳陷

Abstract: Evidence weight method based on Bayesian conditional probability is a common method for oil and gas resource assessment using geographical information system (GIS). After analyzing the natural gas reservoir-forming conditions of Kuqa depression in Tarim basin, this paper created seven geological evidence layers including source bed, caprock, reservoir, fault and strata pressure. By the evidence weight method integrated with overlay analysis of GIS, the weight of every layer is given and independence test of every two layers is made. At last, a posterior probability map of gas exploration potential is presented, by which the study area is classified into four grades, of which Ⅱgrade areas are defined target areas.

Key words: oil geological anomaly, geographic information system (GIS), overlay analysis, evidence weight method, Kuqa depression

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