沧东凹陷孔一期构造活动的沉积响应
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摘要
钻井资料的缺少限制了对沧东凹陷孔一段构造与沉积的关系研究。利用地震属性技术,结合测井数据和三维地震剖面,对沧东凹陷孔一段构造与沉积特征进行分析与解释,结果表明:孔店凸起、沧东断层和火山作用是影响孔一期沧东凹陷演化的主要构造活动,其中,前两者直接控制着凹陷的发展。受构造活动影响,缓坡带与陡坡带2种构造样式存在于凹陷东西两侧,凹陷内部构成了3个沉积区:缓坡带沉积区、陡坡带沉积区及凹陷沉降中心沉积区。缓坡带主要沉积辫状河三角洲,砂体类型主要为辫状河道、河口砂坝沉积;陡坡带主要发育冲积扇和扇三角洲,砂体类型主要有扇体上发育的河道沉积及河口砂坝沉积;凹陷沉降中心是半深湖—深湖相沉积。沧东断层与孔店凸起是孔一期沧东凹陷构造演化的主控因素,更是控制凹陷沉积环境与沉积相类型及砂体空间展布特征的决定性因素。
Due to the few drilling data,the research on the characteristics and relationships between Ek_1 sedimentary and structure in Cangdong Sag is limited.Using the seismic attributes technology,and combining with the logging data and three-dimensional seismic profiles,the structure and sedimentary characteristics are analyzed and interpreted.The results show that the tectonic evolution of Cangdong Sag is mainly affected by Kongdian Arch,Cangdong Fault and volcanism,especially the former two ones which directly control the development of the sag.Influenced by the tectonic activity,the two structural styles of gentle slope and steep slope exist in the east and west sides of Cangdong Sag,so three sedimentary areas are built on the sag:the gentle-slope deposition zone,the steep-slope deposition zone and the subsidence-center deposition area.On the gentle-slope deposition zone,tne braided delta is deposited and the braided channel,sand bar deposits are the main types of sand bodies; alluvial fan and fan delta control the sand bodies types of debris flow deposits,and channel deposits and sand bar developes in alluvial fan on the steep-slope deposition zone;while it is the semi-deep lake and deep lake facies on the subsidence-center deposition area.To a large extent,Cangdong Fault and Kongdian Arch not only control the tectonic evolution of Cangdong Sag, but also are the decisive factors controlled on the types of depositional environment and sedimentary facies and the spatial distribution characteristics of sand bodies.
Due to the few drilling data,the research on the characteristics and relationships between Ek_1 sedimentary and structure in Cangdong Sag is limited.Using the seismic attributes technology,and combining with the logging data and three-dimensional seismic profiles,the structure and sedimentary characteristics are analyzed and interpreted.The results show that the tectonic evolution of Cangdong Sag is mainly affected by Kongdian Arch,Cangdong Fault and volcanism,especially the former two ones which directly control the development of the sag.Influenced by the tectonic activity,the two structural styles of gentle slope and steep slope exist in the east and west sides of Cangdong Sag,so three sedimentary areas are built on the sag:the gentle-slope deposition zone,the steep-slope deposition zone and the subsidence-center deposition area.On the gentle-slope deposition zone,tne braided delta is deposited and the braided channel,sand bar deposits are the main types of sand bodies; alluvial fan and fan delta control the sand bodies types of debris flow deposits,and channel deposits and sand bar developes in alluvial fan on the steep-slope deposition zone;while it is the semi-deep lake and deep lake facies on the subsidence-center deposition area.To a large extent,Cangdong Fault and Kongdian Arch not only control the tectonic evolution of Cangdong Sag, but also are the decisive factors controlled on the types of depositional environment and sedimentary facies and the spatial distribution characteristics of sand bodies.
引文
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[11]赵斌,刘维永,黄江波,等.地震综合解释技术在渤海A油田开发中的应用[J].石油地质与工程,2010,24(5):80-83. Zhao Bin,Liu Weiyong,Huang Jiangbo,et al.The application of geophysical technology in Bohai A Oilfield development[J].Petroleum Geology and Engineering,2010,24(5):80-83.
[2]李志文.沧东凹陷带的结构及勘探前景[J].石油学报,1989,10(3): 31-38. Li Zhiwen.Texture of Cangdong Sag belt and its prospects of petroleum exploration[J].Acta Petrolei Sinica,1989,10(3):31-38.
[3]韩冰.黄骅坳陷孔南地区孔二段沉积体系研究[D].成都:成都理工大学,2009. Han Bing.Study on sedimentary system of Kong Member 2 in Kongnan Area in Huanghua Depression[D].Chengdu:Chengdu University of Techennology,2009.
[4]向富强.地震相干分析和时频分析方法及其在储层描述中的应用[D].成都:成都理工大学,2008:46. Xiang Fuqiang.Coherence analysis and time-frequency analysis of seismic data and with their applications in reservoir characteristics [D].Chengdu:Chengdu University of Technology,2008:46.
[5]漆家福,陆克政,张一伟,等.黄骅盆地孔店凸起的形成与演化[J].石油学报,1994,15(增刊1):27-33. Qi Jiafu,Lu Kezheng,Zhang Yiwei,et al.The formation and evolution of Kongdian High in Huanghua Basin[J].Acta Petrolei Sinica, 1994,15(Suppl.1):27-33.
[6]Tingting Yao,Anil Chopra.Integration of seismic attribute map into 3D facies modeling[J].Journal of Petroleum Science and Engineering, 2000(27):69-84.
[7]Marco Benvenuti.Facies analysis and tectonic significance of lacustrine fan-deltaic successions in the Pliocene-Pleistocene Mugello Basin, Central Italy[J].Sedimentary Geology,2003(157 ):197-234.
[8]周力宏,李勇,王振生,等.陆相断陷盆地缓坡带沉积体系与成藏动力学:以黄骅坳陷为例[M].北京:科学出版社,2009:107. Zhou Lihong,Li Yong,Wang Zhensheng,et al.The sedimentary system and reservior-forming dynamics of the gentle slope zone in continental downfaulted bsain:an example from Huanghua Depression[M]. Beijing:Science Press,2009:107.
[9]李玉新.地震相干技术在断层与沉积相解释中的应用[J].沉积与特提斯地质,2006,26(3):69-71. Li Yuxin.The application of the seismic coherence technique to the interpretation of faults and sedimentary fades in Shengli Oilfield[J]. Sedimentary Geology and Tethyan Ceology,2006,26(3):69-71.
[10]王军,周东红,张中巧,等.低位楔形三角洲砂体岩性尖灭线地震响应特征探索[J].石油地质与工程,2010,24(5):33-36. Wang Jun,Zhou Donghong,Zhang Zhongqiao,et al.Study of the seismic response on the pinch out line of LST wedge-shaped delta[J]. Petroleum Geology and Engineering,2010,24(5):33-36.
[11]赵斌,刘维永,黄江波,等.地震综合解释技术在渤海A油田开发中的应用[J].石油地质与工程,2010,24(5):80-83. Zhao Bin,Liu Weiyong,Huang Jiangbo,et al.The application of geophysical technology in Bohai A Oilfield development[J].Petroleum Geology and Engineering,2010,24(5):80-83.
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