准噶尔盆地南缘阿什里地区构造特征及有利勘探方向
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摘要
阿什里地区位于北天山山前冲断带,构造变形复杂,地震剖面反射不清,多年来难以明确其构造变形特征。根据野外地质露头和地震剖面解释,运用平衡剖面技术建立并验证了阿什里地区的构造解释模型,并根据断层发育特征及变形样式的差异,将阿什里地区分为逆掩推覆带、山前变形带和前缘变形带。结合区域地质背景,根据构造变形特征分析,将阿什里地区构造演化分为:晚二叠世的前陆盆地压陷阶段、三叠纪的挤压挠曲阶段、早-中侏罗世的伸展拗陷阶段、晚侏罗世—古近纪的陆内挤压拗陷阶段和上新世以来的强烈挤压阶段。结合区域烃源岩发育特征,根据生烃演化史分析,确定了头屯河构造带为有利勘探方向。
Ashili area lies in the piedmont thrust belt in north Tianshan mountain,with complex structural deformation,poor seismic profile and unclear structural characteristics.Based on the field geologic outcrops and seismic interpretation data,the structural interpretation model for this area is developed and verified,combined with regional geologic background and balanced section technique.In view of the fracture development feature and deformation differences,Ashili area can be divided into overthrust nappe zone,piedmont deformation zone,and frontal deformation zone.And its tectonic evolution can be divided into five stages such as the foreland basinal compressive depression stage of Late Permian,the compressive-flexural stage of Triassic,the extensional depression stage of Early-Middle Jurassic,intracontinental compressive depression stage of Late Jurassic-Paleocene and the intensive compression stage of Pliocene.And according to the regional source rocks development feature and the hydrocarbon-generating evolution history analysis in this area,Toutunhe structural belt is determined as the favorable prospecting target.
Ashili area lies in the piedmont thrust belt in north Tianshan mountain,with complex structural deformation,poor seismic profile and unclear structural characteristics.Based on the field geologic outcrops and seismic interpretation data,the structural interpretation model for this area is developed and verified,combined with regional geologic background and balanced section technique.In view of the fracture development feature and deformation differences,Ashili area can be divided into overthrust nappe zone,piedmont deformation zone,and frontal deformation zone.And its tectonic evolution can be divided into five stages such as the foreland basinal compressive depression stage of Late Permian,the compressive-flexural stage of Triassic,the extensional depression stage of Early-Middle Jurassic,intracontinental compressive depression stage of Late Jurassic-Paleocene and the intensive compression stage of Pliocene.And according to the regional source rocks development feature and the hydrocarbon-generating evolution history analysis in this area,Toutunhe structural belt is determined as the favorable prospecting target.
引文
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[8]方世虎,郭召杰,张志诚,等.准噶尔盆地中生代演化的地层学和沉积学证据[J].高校地质学报,2004,10(4):554-561.
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[10]吴孔友,查明,王绪龙,等.准噶尔盆地构造演化与动力学背景再认识[J].地球学报,2005,26(3):217-222.
[11]陈叶全,王伟锋.准噶尔盆地构造演化与油气成藏特征[J].石油大学学报(自然科学版),2004,28(3):4-8.
[2]于福生,李国志,杨光达,等.准噶尔盆地南缘褶皱—冲断带变形特征及成因机制模拟[J].大地构造与成矿学,2009,33(3):386-395.
[3]中科院地学部,新疆石油管理局.准噶尔盆地形成演化与油气形成[M].北京:科学出版社,1989:1-25.
[4]陈书平,张一伟,汤良杰,等.准噶尔晚石炭世—二叠纪前陆盆地的演化[J].石油大学学报(自然科学版),2001,25(5):11-15.
[5]赵白.准噶尔盆地的形成与演化[J].新疆石油地质,1992,13(3):191-196.
[6]陈发景,汪新文,汪新伟.准噶尔盆地的原型和构造演化[J].地学前缘,2005,12(3):77-88.
[7]陈新,卢华复,舒良树,等.准噶尔盆地构造演化分析新进展[J].高校地质学报,2002,8(3):257-267.
[8]方世虎,郭召杰,张志诚,等.准噶尔盆地中生代演化的地层学和沉积学证据[J].高校地质学报,2004,10(4):554-561.
[9]吴庆福.准噶尔盆地发育阶段、构造单元划分及局部构造成因概论[J].新疆石油地质,1986,7(1):29-37.
[10]吴孔友,查明,王绪龙,等.准噶尔盆地构造演化与动力学背景再认识[J].地球学报,2005,26(3):217-222.
[11]陈叶全,王伟锋.准噶尔盆地构造演化与油气成藏特征[J].石油大学学报(自然科学版),2004,28(3):4-8.
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