Distribution and Genesis of the Secondary Pore of Paleogene Reservoir in Xihu Depression, Eastern Sea Basin

SU Ao; CHEN Hong-han; CAO Lai-sheng; LI Cheng-hai; LEI Ming-zhu; ZHAO Yu-tao

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SU Ao, CHEN Hong-han, CAO Lai-sheng, LI Cheng-hai, LEI Ming-zhu, ZHAO Yu-tao. Distribution and Genesis of the Secondary Pore of Paleogene Reservoir in Xihu Depression, Eastern Sea Basin[J]. Acta Sedimentologica Sinica, 2014, 32(5): 949-956.

Citation:

Distribution and Genesis of the Secondary Pore of Paleogene Reservoir in Xihu Depression, Eastern Sea Basin

1.
Evaluation Institute of Oil and Gas Development, Geophysical Research Institute, BGP, CNPC, Zhuozhou, Hebei 072750;
2.
China University of Geosciences (Wuhan) Resources Institute "Structure and Oil and Gas Resources" Key Laboratory of the Ministry of Education, Wuhan 430074;
3.
Research Institute of Petroleum Exploration and Development, Petro China Huabei Oilfield Company, Renqiu, Hebei 062550;
4.
Research Institute of Zhanjiang Branch, CNOOC, Zhanjiang, Guangdong 524057

Received Date: 2013-07-11
Rev Recd Date: 2013-09-23
Publish Date: 2014-10-10

Abstract

This paper mainly discusses the distribution and genesis of secondary pores in Paleogene sandstones in Xihu depression by using a number of the thin section, casting thin section, carbon and oxygen isotopes of carbonate cements, fluid inclusions, clay mineral X-ray diffraction, Laser Scanning Confocal Microscope and porosity and permeability data, combined with regional tectonic sedimentary background. The study results indicate that a large number of secondary pores occurred at two depth ranges of 2 500~3 100 m and 3 500~4 400 m; Organic acids dissolving feldspars minerals mainly leads to the first section of the secondary porosity zone, H₂S produced by sulphate thermal oxidation reduction reaction leads to part of the secondary porosity; quartz dissolution and abnormal high pressure leads to the second section of the secondary porosity zone in the alkaline fluid environment. The study concluded that the genesis of secondary pore zone contributes to predict reservoir stratum of high quality.
- Xihu depression,
- Paleogene reservoir,
- secondary pore,
- distribution

References

[1]	舒艳, 胡明毅, 蒋海军, 等. 西湖凹陷西部斜坡带储层成岩作用及孔隙演化[J]. 海洋石油, 2011, 31(4):63-67[Su Yan, Hu Mingyi, Jiang Haijun, et al. Diagenesis and reservoir porosity evolution of Western Slope Zone of Xihu sag[J]. Offshore Oil, 2011, 31(4): 63-67]
[2]	张武, 徐发, 徐国盛, 等. 西湖凹陷某构造花港组致密砂岩储层成岩作用与孔隙演化[J]. 成都理工大学学报:自然科学版, 2012, 39(2):122-129[Zhang Wu, Xu Fa, Xu Guosheng, et al. Diagenesis and pore evolution of Huagang Formation tight sandstone reservoirs in a structure of Xihu depression in East China Sea Basin[J]. Journal of Chengdu University of Technology: Science & Technology Edition, 2012, 39(2): 122-129]
[3]	苏奥, 陈红汉, 王存武, 等. 东海盆地西湖凹陷天然气来源探讨[J]. 地质科技情报, 2014, 33(1):157-162[Su Ao, Chen Honghan, Wang Cunwu, et al. Source of natural gas in Xihu depression of the East China Sea Basin[J]. Geological Science and Technology Information, 2014, 33(1): 157-162]
[4]	苏奥, 陈红汉, 王存武, 等. 东海盆地西湖凹陷油气成因及成熟度判别[J]. 石油勘探与开发, 2013, 40(5):521-527[Su Ao, Chen Honghan, Wang Cunwu, et al. Genesis and maturity identification of oil and gas in the Xihu Sag, East China Sea Basin[J]. Petroleum Exploration and Development, 2013, 40(5): 521-527]
[5]	郑永飞, 陈江峰. 稳定同位素地球化学[M]. 北京:科学出版社, 2000:1-247[Zhen Yongfeng, Chen Jiangfeng. Stable Isotope Geochemistry[M]. Beijing: Science Press, 2000: 1-247]
[6]	王勇, 钟建华, 陈昊, 等. 东濮凹陷古近系深层次生孔隙垂向分布特征及成因[J]. 石油勘探与开发, 2006, 33(5):576-580[Wang Yong, Zhong Jianhua, Chen Hao, et al. Vertical distribution and genesis of the secondary pore in deep formation of Paleogene at Dongpu sag[J]. Petroleum Exploration and Development. 2006, 33(5): 576-580]
[7]	Hudso J D. Stable isotopes limestone lithification[J]. Journal of Geological Society, 1977, 133(4): 637-660
[8]	Irwin H, Coleman M L, Curtis C. Isotope evidence for the source of diagenetic carbonate during burial of organic rich sediments[J]. Nature, 1977, 269 (5625): 209-213
[9]	张哨楠. 川西致密砂岩的石英次生加大及其对储层的影响[J]. 地质论评, 1998, 44(6):649-655[Zhang Shaonao. Quartz overgrowths and their influence on the reservoir quality of tight sandstone in the western Sichuan Basin[J]. Geological Review 2012, 44(6): 649-655]
[10]	钟大康, 朱筱敏, 蔡进功. 沾化凹陷下第三系砂岩次生孔隙纵向分布规律[J]. 石油与天然气地质, 2003, 24 (3):286-290[Zhong Dakang, Zhu Xiaomin, Cai Jingong. Vertical distribution of secondary pores in Paleogene sandstones in Zhanhua depression[J]. Oil & Gas Geology, 2003, 24 (3): 286-290]
[11]	张莉, 朱筱敏, 钟大康, 等. 惠民凹陷古近系碎屑岩次生孔隙纵向分布规律[J]. 地球科学, 2007, 32(2):253-259[Zhang Li, Zhu Xiaomin, Zhong Dakang, et al. Vertical distribution of secondary pores in Paleogene sandstones in Huimin depression and its genesis analysis[J]. Earth Science, 2007, 32(2): 253-259]
[12]	袁静, 张善文, 乔俊, 等. 东营凹陷深层溶蚀孔隙的多重介质成因机理和动力机制[J]. 沉积学报, 2007, 25(6):840-846[Yuan Jing, Zhang Shanwen, Qiao Jun, et al. Cause of formation and dynamic mechanisms in multiply medium of dissolved pores in deep formation of Dongying sag[J]. Acta Sedimentologica Sinica, 2007, 25(6): 840-846]
[13]	Machel H G. Bacterial and thermochemical sulfate reduction in diagenetic settings: oil and new insights[J]. Sedimentary Geology, 2001, 140(1): 143-175
[14]	郭宏莉, 王大锐. 塔里木油气区砂岩储集层碳酸盐胶结物的同位素组成与成因分析[J]. 石油勘探与开发, 1999, 26(3):31-33[Guo Hongli, Wang Darui. Stable isotopic composition and origin analysis of the carbonate cements within sandstone reservoirs of Tarim oil-gas bearing area[J]. Petroleum Exploration and Development, 1999, 26(3): 31-33]
[15]	钟大康, 朱筱敏, 周新源, 等. 初论塔里木盆地砂岩储层中SiO₂的溶蚀类型及其机理[J].地质科学, 2007, 42(4):403-414[Zhong Dakang, Zhu Xiaomin, Zhou Xinyuan, et al. An approach to categories and mechanism of SiO₂ dissolution in sandstone reservoirs in the Tarim Basin[J]. Chinese Journal of geology, 2007, 42(4): 403-414]
[16]	侯树杰, 袁亚娟, 万志峰, 等. 济阳坳陷车西洼陷异常高压与储层孔隙度的关系[J]. 海洋地质动态, 2010, 26(5):1-7[Hou Shujie, Yuan Yajuan, Wan Zhifeng, et al. Relationship between abnormal high pressure and reservoir porosity in Chexi sag of Jiyang depression[J]. Marine Geology Letters, 2010, 26(5): 1-7]

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Distribution and Genesis of the Secondary Pore of Paleogene Reservoir in Xihu Depression, Eastern Sea Basin

1. Evaluation Institute of Oil and Gas Development, Geophysical Research Institute, BGP, CNPC, Zhuozhou, Hebei 072750;

2. China University of Geosciences (Wuhan) Resources Institute "Structure and Oil and Gas Resources" Key Laboratory of the Ministry of Education, Wuhan 430074;

3. Research Institute of Petroleum Exploration and Development, Petro China Huabei Oilfield Company, Renqiu, Hebei 062550;

4. Research Institute of Zhanjiang Branch, CNOOC, Zhanjiang, Guangdong 524057

Received Date: 2013-07-11

Rev Recd Date: 2013-09-23

Publish Date: 2014-10-10

Key words:

Abstract: This paper mainly discusses the distribution and genesis of secondary pores in Paleogene sandstones in Xihu depression by using a number of the thin section, casting thin section, carbon and oxygen isotopes of carbonate cements, fluid inclusions, clay mineral X-ray diffraction, Laser Scanning Confocal Microscope and porosity and permeability data, combined with regional tectonic sedimentary background. The study results indicate that a large number of secondary pores occurred at two depth ranges of 2 500~3 100 m and 3 500~4 400 m; Organic acids dissolving feldspars minerals mainly leads to the first section of the secondary porosity zone, H₂S produced by sulphate thermal oxidation reduction reaction leads to part of the secondary porosity; quartz dissolution and abnormal high pressure leads to the second section of the secondary porosity zone in the alkaline fluid environment. The study concluded that the genesis of secondary pore zone contributes to predict reservoir stratum of high quality.

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Reference (16)

[1]	舒艳, 胡明毅, 蒋海军, 等. 西湖凹陷西部斜坡带储层成岩作用及孔隙演化[J]. 海洋石油, 2011, 31(4):63-67[Su Yan, Hu Mingyi, Jiang Haijun, et al. Diagenesis and reservoir porosity evolution of Western Slope Zone of Xihu sag[J]. Offshore Oil, 2011, 31(4): 63-67]
[2]	张武, 徐发, 徐国盛, 等. 西湖凹陷某构造花港组致密砂岩储层成岩作用与孔隙演化[J]. 成都理工大学学报:自然科学版, 2012, 39(2):122-129[Zhang Wu, Xu Fa, Xu Guosheng, et al. Diagenesis and pore evolution of Huagang Formation tight sandstone reservoirs in a structure of Xihu depression in East China Sea Basin[J]. Journal of Chengdu University of Technology: Science & Technology Edition, 2012, 39(2): 122-129]
[3]	苏奥, 陈红汉, 王存武, 等. 东海盆地西湖凹陷天然气来源探讨[J]. 地质科技情报, 2014, 33(1):157-162[Su Ao, Chen Honghan, Wang Cunwu, et al. Source of natural gas in Xihu depression of the East China Sea Basin[J]. Geological Science and Technology Information, 2014, 33(1): 157-162]
[4]	苏奥, 陈红汉, 王存武, 等. 东海盆地西湖凹陷油气成因及成熟度判别[J]. 石油勘探与开发, 2013, 40(5):521-527[Su Ao, Chen Honghan, Wang Cunwu, et al. Genesis and maturity identification of oil and gas in the Xihu Sag, East China Sea Basin[J]. Petroleum Exploration and Development, 2013, 40(5): 521-527]
[5]	郑永飞, 陈江峰. 稳定同位素地球化学[M]. 北京:科学出版社, 2000:1-247[Zhen Yongfeng, Chen Jiangfeng. Stable Isotope Geochemistry[M]. Beijing: Science Press, 2000: 1-247]
[6]	王勇, 钟建华, 陈昊, 等. 东濮凹陷古近系深层次生孔隙垂向分布特征及成因[J]. 石油勘探与开发, 2006, 33(5):576-580[Wang Yong, Zhong Jianhua, Chen Hao, et al. Vertical distribution and genesis of the secondary pore in deep formation of Paleogene at Dongpu sag[J]. Petroleum Exploration and Development. 2006, 33(5): 576-580]
[7]	Hudso J D. Stable isotopes limestone lithification[J]. Journal of Geological Society, 1977, 133(4): 637-660
[8]	Irwin H, Coleman M L, Curtis C. Isotope evidence for the source of diagenetic carbonate during burial of organic rich sediments[J]. Nature, 1977, 269 (5625): 209-213
[9]	张哨楠. 川西致密砂岩的石英次生加大及其对储层的影响[J]. 地质论评, 1998, 44(6):649-655[Zhang Shaonao. Quartz overgrowths and their influence on the reservoir quality of tight sandstone in the western Sichuan Basin[J]. Geological Review 2012, 44(6): 649-655]
[10]	钟大康, 朱筱敏, 蔡进功. 沾化凹陷下第三系砂岩次生孔隙纵向分布规律[J]. 石油与天然气地质, 2003, 24 (3):286-290[Zhong Dakang, Zhu Xiaomin, Cai Jingong. Vertical distribution of secondary pores in Paleogene sandstones in Zhanhua depression[J]. Oil & Gas Geology, 2003, 24 (3): 286-290]
[11]	张莉, 朱筱敏, 钟大康, 等. 惠民凹陷古近系碎屑岩次生孔隙纵向分布规律[J]. 地球科学, 2007, 32(2):253-259[Zhang Li, Zhu Xiaomin, Zhong Dakang, et al. Vertical distribution of secondary pores in Paleogene sandstones in Huimin depression and its genesis analysis[J]. Earth Science, 2007, 32(2): 253-259]
[12]	袁静, 张善文, 乔俊, 等. 东营凹陷深层溶蚀孔隙的多重介质成因机理和动力机制[J]. 沉积学报, 2007, 25(6):840-846[Yuan Jing, Zhang Shanwen, Qiao Jun, et al. Cause of formation and dynamic mechanisms in multiply medium of dissolved pores in deep formation of Dongying sag[J]. Acta Sedimentologica Sinica, 2007, 25(6): 840-846]
[13]	Machel H G. Bacterial and thermochemical sulfate reduction in diagenetic settings: oil and new insights[J]. Sedimentary Geology, 2001, 140(1): 143-175
[14]	郭宏莉, 王大锐. 塔里木油气区砂岩储集层碳酸盐胶结物的同位素组成与成因分析[J]. 石油勘探与开发, 1999, 26(3):31-33[Guo Hongli, Wang Darui. Stable isotopic composition and origin analysis of the carbonate cements within sandstone reservoirs of Tarim oil-gas bearing area[J]. Petroleum Exploration and Development, 1999, 26(3): 31-33]
[15]	钟大康, 朱筱敏, 周新源, 等. 初论塔里木盆地砂岩储层中SiO₂的溶蚀类型及其机理[J].地质科学, 2007, 42(4):403-414[Zhong Dakang, Zhu Xiaomin, Zhou Xinyuan, et al. An approach to categories and mechanism of SiO₂ dissolution in sandstone reservoirs in the Tarim Basin[J]. Chinese Journal of geology, 2007, 42(4): 403-414]
[16]	侯树杰, 袁亚娟, 万志峰, 等. 济阳坳陷车西洼陷异常高压与储层孔隙度的关系[J]. 海洋地质动态, 2010, 26(5):1-7[Hou Shujie, Yuan Yajuan, Wan Zhifeng, et al. Relationship between abnormal high pressure and reservoir porosity in Chexi sag of Jiyang depression[J]. Marine Geology Letters, 2010, 26(5): 1-7]

Distribution and Genesis of the Secondary Pore of Paleogene Reservoir in Xihu Depression, Eastern Sea Basin

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通讯作者: 陈斌, bchen63@163.com

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