多源信息叠合在延吉盆地油气远景预测的应用

基于GIS的多源信息叠合评价方法是以基础地质图件或数据作为信息，将原始地质图件和数据网格化并赋以属性值，通过地质信息分级标准，变换为标准信息图，通过因子分析，确定各参数的权重并建立油气评价模型，用符合地质含义的关系式进行数据与图层、图层与图层之间的叠合、计算，最后通过空间隐含信息的提取，预测出盆地的有利勘探区域.作者采用该方法，对已发现工业油气流的延吉盆地进行了多源信息叠合、计算评价，指出了章岩洞-崇明、延吉市周遍、铜佛寺周遍三大区块为油气勘探有利远景区.

Application to oil gas prospect forecast based on multi-source information superimposed evaluation method in Yanji basin

The GIS-based multi-source information superimposed evaluation method uses the geological map or geological data as information.First,it makes original maps and data grided and gives them attribute values.Second,it transforills the grid map into a standard information map based on information classification standard.Third,through factorial analysis,it determines various parameter weights,establishes the oil gas evaluation model,carries out superimposing and calculating between the data and layer,layer and layer by relationship formula conforming geological meanings.Finally,it forecasts the advantageous exploration region in the Yanji basin by extraction of hidden space information.Using this method,we have carried out appraisal by multiple source information superposition and computation in the Yanji basin with discovered industry oil and gas.Three big sub-areas including Zhangyangdonqg-chongming,the round edge of Yanji,and the round edge of Copper Buddhist Temple are pointed out as the future prospect area for explaration.