航磁寻找油气藏几种方法应用效果分析
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摘要
航磁异常与油气藏之间有着密切的关系 ,烃类向上逸散及局部构造在磁异常中都有不同程度的表现 ,由此可以建立航磁异常与烃类分布关系的理论模式。文中探讨了 3种提取与油气相关异常的方法 ,即用剖面上延剩余法提取与烃类相关的高频微磁异常及与局部构造有关的中频局部异常 ;用归一化总梯度法确定油气上方场源位置 ;用线积分法圈定油气田范围等 ,并结合实例对以上方法的应用效果进行了分析
There is a close relationship between areomagnetic anomalies and hydrocarbon accumlations,because upward diffusion of hydrocarbon and local structures may be expressed in magnetic anomalies with various intensity.Thus,a theoretic model can be established for the relationship between aeromagnetic anomaly and hydrocarbon distribution.Three methods are discussed to identify anomalies related to hydrocarbon accumulations:(1)Upward continuation method of residual magnetic anomaly along profile section which can extract high frequency micromagnetic anomalies related to hydrocarbon and middle frequency magnetic anomalies related to local structures; (2)Normalized total gradient method,which can be used to determine location of magnetic field source above hydrocarbon accumulations; (3)Line integral method,which is useful to mapping areas of oil and gas fields.In combination with several application cases,the actual effects of these methods are analyzed.
There is a close relationship between areomagnetic anomalies and hydrocarbon accumlations,because upward diffusion of hydrocarbon and local structures may be expressed in magnetic anomalies with various intensity.Thus,a theoretic model can be established for the relationship between aeromagnetic anomaly and hydrocarbon distribution.Three methods are discussed to identify anomalies related to hydrocarbon accumulations:(1)Upward continuation method of residual magnetic anomaly along profile section which can extract high frequency micromagnetic anomalies related to hydrocarbon and middle frequency magnetic anomalies related to local structures; (2)Normalized total gradient method,which can be used to determine location of magnetic field source above hydrocarbon accumulations; (3)Line integral method,which is useful to mapping areas of oil and gas fields.In combination with several application cases,the actual effects of these methods are analyzed.
引文
1)蔡振京等 .松辽盆地高精度构造航磁成果报告 .1985
2 )蔡振京等 .山东滨县—博兴地区高精度航磁伽马能谱成果报告 .1987
3 )李卢玲等 .柴达木盆地中部地区航空磁测详查结果报告 .1985
1)马英等 .磁电勘探线积分方法技术及有关问题研究 .1990
1 亨德森 R著 ,郑宝生译 .航空磁测直接显示碳氢化合物 .航空物探技术 ,1990 ,(2 ) :76～ 81
2 卡什达诺夫 B A著 ,焦恩富译 .利用航磁资料进行局部石油预测 .航空物探技术 ,1989,(2 ) :68～ 72
3 皮尔逊 S J著 ,陆邦干译 .磁电勘探直接找油气 .河北涿州 :石油部物探局研究院情报室 ,1982
4 张锦波 .辽河断陷南部沿海地区航磁直接找油技术的应用 .见 :中国石油天然气总公司情报研究所编 ,非地震物化探法油气勘探百例集 ,1991,99～ 10 4
5 王家林等 .磁测找油的进一步试验及有关问题的研究 .石油地球物理勘探 ,1985 ,2 0 (4) :3 98～ 40 0
2 )蔡振京等 .山东滨县—博兴地区高精度航磁伽马能谱成果报告 .1987
3 )李卢玲等 .柴达木盆地中部地区航空磁测详查结果报告 .1985
1)马英等 .磁电勘探线积分方法技术及有关问题研究 .1990
1 亨德森 R著 ,郑宝生译 .航空磁测直接显示碳氢化合物 .航空物探技术 ,1990 ,(2 ) :76～ 81
2 卡什达诺夫 B A著 ,焦恩富译 .利用航磁资料进行局部石油预测 .航空物探技术 ,1989,(2 ) :68～ 72
3 皮尔逊 S J著 ,陆邦干译 .磁电勘探直接找油气 .河北涿州 :石油部物探局研究院情报室 ,1982
4 张锦波 .辽河断陷南部沿海地区航磁直接找油技术的应用 .见 :中国石油天然气总公司情报研究所编 ,非地震物化探法油气勘探百例集 ,1991,99～ 10 4
5 王家林等 .磁测找油的进一步试验及有关问题的研究 .石油地球物理勘探 ,1985 ,2 0 (4) :3 98～ 40 0
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