张掖—民乐盆地地质—地球物理信息揭示的地热资源前景与勘查方法优化组合
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摘要
张掖—民乐盆地是一个中新生代复合盆地,包括中生代张扭性拉分断陷盆地和新生代挤压拗陷盆地。该盆地已经进行了大量地球物理勘查,并施工两口石油参数井,通过地层孔隙度、渗透率、密度和测温资料对比,证实新生界第四系和新近系疏勒河组是盆地热储盖层,古近系白杨河组埋深适中是理想热储层,白垩系埋深较大含水性较弱,属差—极差储集层,可作为热储层底板。本文结合区内钻孔测井参数,对民乐地热勘查开发区地震和电磁测深勘查效果的方法有效性进行了对比,探讨了勘查方法优化组合。
Zhangye-Minle basin is a composite basin, including the Mesozoic tensional fault basin and the Cenozoic extrude depression basin. The basin has carried out a large number of geophysical surveys and construction of two oil parameter wells. According to the comparison of formation porosity, permeability, density and temperature data, the Cenozoic Quaternary and Neogene Shulehe Formation are the thermal reservoirs of the basin, the Paleogene Baiyanghe Formation is the ideal thermal reservoir, and the Cretaceous can be used as a thermal reservoir floor due to the larger burial depth and weak water content. Based on borehole logging parameters in this area, this paper compares the validity of the methods of seismic and electromagnetic soundings in the Geothermal Exploration and Development Zone of Minle Basin, and discusses the optimal combination of exploration methods.
Zhangye-Minle basin is a composite basin, including the Mesozoic tensional fault basin and the Cenozoic extrude depression basin. The basin has carried out a large number of geophysical surveys and construction of two oil parameter wells. According to the comparison of formation porosity, permeability, density and temperature data, the Cenozoic Quaternary and Neogene Shulehe Formation are the thermal reservoirs of the basin, the Paleogene Baiyanghe Formation is the ideal thermal reservoir, and the Cretaceous can be used as a thermal reservoir floor due to the larger burial depth and weak water content. Based on borehole logging parameters in this area, this paper compares the validity of the methods of seismic and electromagnetic soundings in the Geothermal Exploration and Development Zone of Minle Basin, and discusses the optimal combination of exploration methods.
引文
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[2]刘兴春.民乐山前平原新构造运动及其对地下水埋藏的影响[J].甘肃地质学报,2000,09(01):74-79
[3]赵聚林,刘多朝.概论祁连山前民乐盆地隐伏构造、第四系及地下水——依据1∶10万综合电法成果[J].甘肃地质学报,2005,14(01):82-85
[4]魏红军,李百祥.张掖—民乐盆地地质构造特征与张掖市地热资源开发可行性分析[J].甘肃地质,2007,16(04):73-76+84
[5]扬树锋,等著.祁连山北缘冲断构造特征及含油气远景[M].北京:科学出版社,2007
[6]王多杰.民乐盆地及邻区构造地貌特征[J].甘肃地质,1990(10):88-99
[7]王多杰,徐小卫.民乐盆地的新构造与地震[J].甘肃地质,1991(11):24-35
[8]王鈞,黄尚瑶,汪集旸.中国地温场特征[M].北京:地震出版社,1990
[9]安永康,孙知新,李百祥.甘肃省地热资源分布特征、开发现状与前景[J].甘肃地质学报,2005,14(02):70-75
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[12]瞿毓沛,蔡体梁.甘肃的第三系[J].甘肃地质,1984(02):1-40