柴达木盆地北缘红山地区白垩系勘探目标
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摘要
根据柴达木盆地北缘红山地区的露头、钻井、地震、CEMP资料,采用高分辨率层序地层学观点,对红山地区白垩系犬牙沟群进行了长期、中期基准面旋回层序划分,建立起了犬牙沟群层序地层格架。在此基础上对长期基准面旋回层序进行了沉积相分析,研究认为:两个长期基准面旋回分别对应于犬牙沟群上、下段;犬牙沟群下段物源来自南缘柴达木古隆起,主要为辫状河三角洲沉积;犬牙沟群上段物源来自北缘褶皱山系,主要为冲积扇沉积。并重点对该区的烃源岩和犬牙沟群下段的储层、圈闭特征、成藏条件、油气显示等进行了全面分析,指出Ⅳ号断块为上盘(F7断层以上)的主要勘探目标,红北1、红北2、红北3圈闭为下盘(F7断层以下)的主要勘探目标。
According to the materials of exposure,drilling,seismic data and CEMP in Hongshan area of northern Qaidam Basin,with the theory of high-resolution sequence stratigraphy,the sequence stratigraphic framework of the Quanyagou Group is established,based on the sequence division of long term and mid-term basic level cycles of the Group. Sedimentary facies analysis is thereby conducted on the long term basic level cycle sequence. It is considered hat two long term basic level cycles accord with the upper and lower members of the Quanyagou Group; the sedimetaology resources of the lower member comes from the Qaidam paleo-uplift which is to the south of Hongshan area,with braided river delta well-developed; the sedimetaology resources of the upper member in Quanyagou Group comes from the folded mountain which is to the north of Hongshan area,with alluvial fan well-developed. Hydrocarbon source rocks,reservoirs in the lower member,trap traits,hydrocarbon accumulation conditions,and oil-gas indication are analyzed comprehensively. It is pointed that the fault-block IV is the major exploration target in the upper wall (above F7 fault),while the No.1,No.2,and No.3 traps of the northern Hongshan area are the major target in the lower wall (below F7 fault).
According to the materials of exposure,drilling,seismic data and CEMP in Hongshan area of northern Qaidam Basin,with the theory of high-resolution sequence stratigraphy,the sequence stratigraphic framework of the Quanyagou Group is established,based on the sequence division of long term and mid-term basic level cycles of the Group. Sedimentary facies analysis is thereby conducted on the long term basic level cycle sequence. It is considered hat two long term basic level cycles accord with the upper and lower members of the Quanyagou Group; the sedimetaology resources of the lower member comes from the Qaidam paleo-uplift which is to the south of Hongshan area,with braided river delta well-developed; the sedimetaology resources of the upper member in Quanyagou Group comes from the folded mountain which is to the north of Hongshan area,with alluvial fan well-developed. Hydrocarbon source rocks,reservoirs in the lower member,trap traits,hydrocarbon accumulation conditions,and oil-gas indication are analyzed comprehensively. It is pointed that the fault-block IV is the major exploration target in the upper wall (above F7 fault),while the No.1,No.2,and No.3 traps of the northern Hongshan area are the major target in the lower wall (below F7 fault).
引文
陈新领、薛建勤等,柴达木盆地北缘山前带石油地质综合评价与勘探目标选择,2004。
江苏省有色金属华东地质勘查局八一四队,柴达木盆地红山地区大煤沟—怀头他拉CEMP勘探成果报告,2006。
陈新领、薛建勤等,柴达木盆地北缘山前带石油地质综合评价与勘探目标选择,2004。
陈新领、薛建勤等,柴达木盆地北缘山前带石油地质综合评价与勘探目标选择,2004。
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[2]薛光华,杨永泰.柴达木盆地北缘中新生代构造演化与油气的关系[J].大庆石油地质与开发,2002,21(1):35～39.
[3]和钟铧,刘招君,郭巍,等.柴达木北缘中生代盆地的成因类型及构造沉积演化[J].吉林大学学报(地球科学版),2002,32(4):333～338.
[4]姜波,徐凤银,彭德华,等.柴达木盆地北缘断裂构造变形特征[J].中国矿业大学学报,2004,33(6):687～692.
[5]薛光华,杨永泰.柴达木盆地北缘油气分布规律研究[J].石油实验地质,2002,24(2):141～146.
[6]金之钧,张明利,汤良杰,等.柴达木中新生代盆地演化及其控油气作用[J].石油与天然气地质,2004,25(6):603～608.
[7]张敏,尹成明,陈琰,等.柴达木盆地北缘含油气系统与油气勘探方向[J].沉积学报,2005,23(1):143～149.
[8]Cross T A.High-resolution stratigraphic correlationfrom the perspective of base-level cycles and sedimentaccommodation.In:Proceedings of NorthwesternEuropean Sequence Stratigraphy Congress.1994:105～123.
江苏省有色金属华东地质勘查局八一四队,柴达木盆地红山地区大煤沟—怀头他拉CEMP勘探成果报告,2006。
陈新领、薛建勤等,柴达木盆地北缘山前带石油地质综合评价与勘探目标选择,2004。
陈新领、薛建勤等,柴达木盆地北缘山前带石油地质综合评价与勘探目标选择,2004。
[1]胡受权,曹运江,黄继祥,等.柴达木盆地北缘地区前陆盆地演化及油气勘探目标[J].天然气工业,1999,19(4):1～5.
[2]薛光华,杨永泰.柴达木盆地北缘中新生代构造演化与油气的关系[J].大庆石油地质与开发,2002,21(1):35～39.
[3]和钟铧,刘招君,郭巍,等.柴达木北缘中生代盆地的成因类型及构造沉积演化[J].吉林大学学报(地球科学版),2002,32(4):333～338.
[4]姜波,徐凤银,彭德华,等.柴达木盆地北缘断裂构造变形特征[J].中国矿业大学学报,2004,33(6):687～692.
[5]薛光华,杨永泰.柴达木盆地北缘油气分布规律研究[J].石油实验地质,2002,24(2):141～146.
[6]金之钧,张明利,汤良杰,等.柴达木中新生代盆地演化及其控油气作用[J].石油与天然气地质,2004,25(6):603～608.
[7]张敏,尹成明,陈琰,等.柴达木盆地北缘含油气系统与油气勘探方向[J].沉积学报,2005,23(1):143～149.
[8]Cross T A.High-resolution stratigraphic correlationfrom the perspective of base-level cycles and sedimentaccommodation.In:Proceedings of NorthwesternEuropean Sequence Stratigraphy Congress.1994:105～123.
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