断陷盆地剥蚀厚度恢复的构造沉积综合法
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摘要
珠江口盆地惠州凹陷古近系为断陷盆地,珠琼二幕和南海运动使古近系的文昌组和恩平组遭受区域性剥蚀,之后进入持续海相沉积阶段,剥蚀前的地层古地温场、声波时差等特征被再次沉积改变,利用常规剥蚀恢复方法无法准确恢复文昌组和恩平组的剥蚀厚度。针对此,提出了构造沉积综合法。在分析盆地构造沉积特征的基础上,从剥蚀动力学角度出发,采用地震最小剥蚀厚度、构造沉积综合法剥蚀厚度、单井剥蚀厚度和井震关系的研究思路,进行剥蚀厚度恢复。对惠州凹陷古近系文昌组和恩平组剥蚀厚度恢复结果进行了分析,认为文昌组受剥蚀作用较强,在区域上存在较大差异,总体上剥蚀厚度较大;恩平组受剥蚀作用较弱,剥蚀厚度较薄。该方法对恢复断陷盆地剥蚀厚度具有较好的效果。
The Paleocene of Huizhou depression at Zhujiangkou basin is a rift-subsidence basin.Its Wenchang and Enping formations were regionally denuded by Zhuqiong and Nanhai movement,and then entered continuous marine deposition period,the characteristics of paleo -geothermal field and acoustic moveout of the formations before erosion were changed by deposit again.So,conventional methods can not accurately restore the denuded thickness of Wenchang and Enping formations.In order to solve the problem,starting from denudation dynamics,we adopted minimum denuded thickness from seismic data,denuded thickness from structural-sedimentary synthetic method,denuded thickness from single well and well-to-seismic relationship,to restore the denuded thickness of Wenchang and Enping formations.The restoration results were analyzed.The analysis showed that Wenchang formation was suffered stronger denudation, the denuded thickness is largely different in the whole region and is the thicker generally;Enping formation was suffered weaker denudation,and the denuded thickness is relatively thin. The method has good effect for restoring the denuded thickness of rift-subsidence basin.
The Paleocene of Huizhou depression at Zhujiangkou basin is a rift-subsidence basin.Its Wenchang and Enping formations were regionally denuded by Zhuqiong and Nanhai movement,and then entered continuous marine deposition period,the characteristics of paleo -geothermal field and acoustic moveout of the formations before erosion were changed by deposit again.So,conventional methods can not accurately restore the denuded thickness of Wenchang and Enping formations.In order to solve the problem,starting from denudation dynamics,we adopted minimum denuded thickness from seismic data,denuded thickness from structural-sedimentary synthetic method,denuded thickness from single well and well-to-seismic relationship,to restore the denuded thickness of Wenchang and Enping formations.The restoration results were analyzed.The analysis showed that Wenchang formation was suffered stronger denudation, the denuded thickness is largely different in the whole region and is the thicker generally;Enping formation was suffered weaker denudation,and the denuded thickness is relatively thin. The method has good effect for restoring the denuded thickness of rift-subsidence basin.
引文
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13陈增智,柳广弟,郝石生.修正的镜质体反射率剥蚀厚度恢复方法[J].沉积学报,1999,17(1):141-144
14张海军,曹强孙,孙建峰.地层剥蚀厚度恢复研究——以南黄海北部盆地东北凹陷为例[J].中国石油勘探, 2008,13(5):21-25
15朱世全,黄恩静,陈章清,等.基于成因解释的剥蚀厚度求取新模型及应用[J].新疆地质,2006,24(2):206- 209
16张小兵,张哨楠,赵锡奎,等.应用地震地层综合法计算叠合盆地剥蚀厚度——以塔里木盆地阿克库勒凸起为例[J].新疆石油地质,2007,28(3):366-368
17 Guidish T M.Basin evaluation using burial history calculations: an overview[J].AAPG Bulletin,1985, 69(1):92-105
18刘景彦,林畅松,喻岳钰,等.用声波测井资料计算剥蚀量的方法改进[J].石油实验地质,2000,22(4):302- 305
19郝石生,贺志勇,高耀斌,等.恢复地层剥蚀厚度的最优化方法[J].沉积学报,1988,6(4):93-99
20陈长民,施和生,许仕策,等.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社,2003.20-25
21胡少华.基于地震资料的构造-沉积综合方法——一种剥蚀厚度恢复新方法[J].石油地球物理勘探,2004,39 (4):478-483
22刘小平,杨立干,徐健.苏北盆地高邮凹陷始新统剥蚀厚度恢复[J].新疆石油地质,2004,25(2):128-130
2解习农,任建业,焦养泉,等.断陷盆地构造作用与层序样式[J].地质论评,1996,42(3):239-244
3李丕龙,张善文,肖焕钦,等.陆相断陷盆地构造演化与构造样式[M].北京:石油工业出版社,2003.6-12
4马立祥.利用砂岩孔隙度演化趋势估计古地层剥蚀量的简易方法[J].石油实验地质,1991,13(1):543-551
5 Magara K.Thickness of removed sediments,paleoporepressure, and paleotemperature,southwestern part of Western Canada Basin[J].AAPG Bulletin,1976,60 (4):554-565
6真炳钦次.压实与流体运移[M].陈荷立,译.北京:石油工业出版社,1981.8-301
7李勇,ALLEN P A,周荣军,等.青藏高原东缘龙门山晚新生代剥蚀厚度与弹性挠曲模拟[J].地质学报, 2005,79(5):608-615
8柳益群,周立发.用镜质体反射率法确定吐鲁番—哈密盆地的古地温梯度和估算地层剥蚀厚度[J].西北大学学报,1997,27(3):253-258
9赵力彬,黄志龙,李君,等.包裹体测温法在剥蚀厚度恢复中的应用[J].新疆石油地质,2005,26(5):580- 583
10佟彦明,宋立军,曾少军.利用镜质体反射率恢复地层剥蚀厚度的新方法[J].古地理学报,2005,7(3):417- 424
11 Dow W G.Kerogen studies and geological interpretation [J].Journal of Geochemical Exploration,1977, 7(2):79-99
12何生,王青玲.关于用镜质体反射率恢复地层剥蚀厚度的间题讨论[J].地质论评,1989,35(2):119-125
13陈增智,柳广弟,郝石生.修正的镜质体反射率剥蚀厚度恢复方法[J].沉积学报,1999,17(1):141-144
14张海军,曹强孙,孙建峰.地层剥蚀厚度恢复研究——以南黄海北部盆地东北凹陷为例[J].中国石油勘探, 2008,13(5):21-25
15朱世全,黄恩静,陈章清,等.基于成因解释的剥蚀厚度求取新模型及应用[J].新疆地质,2006,24(2):206- 209
16张小兵,张哨楠,赵锡奎,等.应用地震地层综合法计算叠合盆地剥蚀厚度——以塔里木盆地阿克库勒凸起为例[J].新疆石油地质,2007,28(3):366-368
17 Guidish T M.Basin evaluation using burial history calculations: an overview[J].AAPG Bulletin,1985, 69(1):92-105
18刘景彦,林畅松,喻岳钰,等.用声波测井资料计算剥蚀量的方法改进[J].石油实验地质,2000,22(4):302- 305
19郝石生,贺志勇,高耀斌,等.恢复地层剥蚀厚度的最优化方法[J].沉积学报,1988,6(4):93-99
20陈长民,施和生,许仕策,等.珠江口盆地(东部)第三系油气藏形成条件[M].北京:科学出版社,2003.20-25
21胡少华.基于地震资料的构造-沉积综合方法——一种剥蚀厚度恢复新方法[J].石油地球物理勘探,2004,39 (4):478-483
22刘小平,杨立干,徐健.苏北盆地高邮凹陷始新统剥蚀厚度恢复[J].新疆石油地质,2004,25(2):128-130
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