Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock

MIAO Jian yu; ZHU Zong qi; LIU Wen rong; LU Huan yong

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Article Navigation > Acta Sedimentologica Sinica > 2004 > 22(1): 169-175

MIAO Jian yu, ZHU Zong qi, LIU Wen rong, LU Huan yong. Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock[J]. Acta Sedimentologica Sinica, 2004, 22(1): 169-175.

Citation:

MIAO Jian yu, ZHU Zong qi, LIU Wen rong, LU Huan yong. Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock[J]. Acta Sedimentologica Sinica, 2004, 22(1): 169-175.

Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock

Key Laboratory of Continental Dynamics,Ministry of Education, Northwest University; Department of Geology, Northwest University, Xi'an 710069

Received Date: 2003-02-18
Rev Recd Date: 2003-06-07
Publish Date: 2004-03-10

Abstract

Based on the research of the living examples of argillaceous rock in the Paleogene Neogene in Jiyang depression, both the occurrence of the organic matters and the characteristics of the pore structure are analysed. Then the pattern of the relationship between the expulsion path and the primary migration of hydrocarbon in the rock has been observed. The study shows that the pores are small but numerous, and the throats are narrow and thin in argillaceous rock, in which there is better sorting of pore throats, and a better interconnecting as well, besides, there are microfractures frequently observed there. When the argillaceous rocks containing more organic matter enter maturity stage, they are helpful to form thicker dissolved pores, and may easily produce more microfractures. This does not only favor the formation of abnormal pressure, but can delay the process of compact as well, therefore, which may protect the pore system. The occurrence of the organic matters in argillaceous rock can be classified into three types: the Enrichment Type, the Dispersion Type and the Partial Enrichment Type.(a) The Enrichment Type means that the organic matters are distributed plentifully along the bedding plane in the rock which deposited mainly in the finer clay particle and fewer detrital material (15%),and are rich in organic matter; (b) The Dispersion Type means that the organic matters are scattered respectively in the rock which deposited in the coarser clay particle and more detrital material (15%). This type of deposit of organic matters is various in abundance; (c) The Partial Enrichment Type has the properties of both the Enrichment Type and the Dispersion Type. By means of thicker pore throat system it becomes one of the ways through which the mature hydrocarbon can be exported from source rock when the organic matters occurred in Dispersion Type in argillaceous rock.When the organic matters are richer and occurred in the Enrichment Type in argillaceous rock,the binding and cementing of detritus and rock are weaker,besides,the fluid pressures are higher and can easily produce more microfractures. Therefore,they become the major path for primary migration of the mature hydrocarbon.
- organic matter occurrence,
- argillaceous rock,
- primary migration,
- Paleogene Neogene,
- Jiyang depression

References

[1]	LeythaeuserD, MackenzieA, SchaeferR G, et al.A novel approach for recognition and quantification of hydrocarbon migration effects in shale-sandstone sequences.AAPGBulletin,1984, 68(2):196～219
[2]	田世澄,孙尚如.油气初次运移的地球化学效应及排烃类型.地球科学-中国地质大学学报,1990, 15(1):75～86[TianShicheng, Sun Shangru. Geochemical effect and expulsion type of primary migration of petroleum.Earth Science-Journal of China University of Geosciences, 1990, 15(1):75～86]
[3]	李明诚.石油与天然气运移.北京:石油工业出版社,1994.32～89[Li Mingcheng. Migration of oil and gas. Beijing: Petroleum Industry Press,1994.32～89]
[4]	郝石生,柳广弟,黄志龙,等.油气初次运移的模拟模型.石油学报,1994,15(2):21～30[Hao Shisheng, Liu Guangdi, Huang Zhilong, et al. Simulation models for primary hydrocarbon migration.Acta Petrolei Sinica,1994,15(2):21～30]
[5]	Rudkiewicz J L,BeharF. Influence of kerogen type and TOC content on multiphase primary migration. Organic Geochemistry,1994, 21(2):121～133
[6]	DickeyP A. Possible primary migration of oil from source rock in oil phase. AAPG Bulletin,1975, 59(2):337～345
[7]	Magara K. Possible primary migration of oil globules. Journal of Petroleum Geology,1981,3(3):325～331
[8]	陈荷立,汤锡元.油气初次运移的研究现状.见:石油地质译文选,第2集.北京:石油工业出版社,1987.1～17[Cheng Heli, Tang Xiyuan. Current research on primary migration of oil and gas. In: Selections Ⅱof translated text on petroleum geology.Beijing:Petroleum Industry Press,1987,1～17]
[9]	王行信.蒙脱石的成岩演变与石油的初次运移. 沉积学报,1985,3(1):81～91[Wang Xingxin. Diagenetic evolution of montmarillonite and primary migration of petroleum.Acta Sedimentologica Sinica, 1985,3(1):81～91]
[10]	苗建宇,祝总祺,刘文荣,等. 泥岩有机质的赋存状态及其对泥岩封盖能力的影响.沉积学报,1999,17(3):478～482[Miao Jianyu, Zhu Zongqi, Liu Wenrong, et al. Occurrence of organic matter and its effect on sealing ability of argillaceous rock. Acta Sedimentologica Sinica, 17(3):478～481]
[11]	MagaraK. Comparsion of porosity-depth relationships of shale and sandstone. Journal of Petroleum Geology,1980,3(2):175～185
[12]	Robert R Berg, Anthony F Gangi.Primary migration by oil-generation microfracturing in low-permeability source rocks: application to the Austin chalk, Texas. AAPG Bulletin, 1999, 83(5):727～756
[13]	赵杏媛. 如何全面认识粘土矿物在初次运移中作用的探讨.沉积学报,1990,8(2):67～73[Zhao Xingyuan. Discussion on the effect of clay minerals in primary migration of petroleum.Acta Sedimentologica Sinica,1990,8(2):67～73]
[14]	彭大钧,李仲东,刘兴材,等.济阳盆地沉积型异常高压带及深部油气资源的研究.石油学报,1988, 9(3): 9～17[Peng Dajun,Li Zhongdong,Liu Xingcai, et al. A study of depositional type abnormally high pressure zone and deep oil-gas resources in Jiyang basin. Acta Petrolei Sinica, 1988,9(3): 9～17].
[15]	陈荷立,汤锡元.山东东营凹陷泥岩压实作用及油气初次运移问题的探讨.石油学报,1983,4(2):9～16[Cheng Heli, Tang Xiyuan. A discussion on the compaction of argillaceous rocks and migration of oil and gas in Dongying sag Shandong province. Acta Petrolei Sinica,1983,4(2):9～16]
[16]	Momper J A. Oil migration limitations suggested by geological and geochemical considerations. AAPG. Continuing Education Course Note Series 8, 1978

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Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock

Key Laboratory of Continental Dynamics,Ministry of Education, Northwest University; Department of Geology, Northwest University, Xi'an 710069

Received Date: 2003-02-18

Rev Recd Date: 2003-06-07

Publish Date: 2004-03-10

Key words:

Abstract: Based on the research of the living examples of argillaceous rock in the Paleogene Neogene in Jiyang depression, both the occurrence of the organic matters and the characteristics of the pore structure are analysed. Then the pattern of the relationship between the expulsion path and the primary migration of hydrocarbon in the rock has been observed. The study shows that the pores are small but numerous, and the throats are narrow and thin in argillaceous rock, in which there is better sorting of pore throats, and a better interconnecting as well, besides, there are microfractures frequently observed there. When the argillaceous rocks containing more organic matter enter maturity stage, they are helpful to form thicker dissolved pores, and may easily produce more microfractures. This does not only favor the formation of abnormal pressure, but can delay the process of compact as well, therefore, which may protect the pore system. The occurrence of the organic matters in argillaceous rock can be classified into three types: the Enrichment Type, the Dispersion Type and the Partial Enrichment Type.(a) The Enrichment Type means that the organic matters are distributed plentifully along the bedding plane in the rock which deposited mainly in the finer clay particle and fewer detrital material (15%),and are rich in organic matter; (b) The Dispersion Type means that the organic matters are scattered respectively in the rock which deposited in the coarser clay particle and more detrital material (15%). This type of deposit of organic matters is various in abundance; (c) The Partial Enrichment Type has the properties of both the Enrichment Type and the Dispersion Type. By means of thicker pore throat system it becomes one of the ways through which the mature hydrocarbon can be exported from source rock when the organic matters occurred in Dispersion Type in argillaceous rock.When the organic matters are richer and occurred in the Enrichment Type in argillaceous rock,the binding and cementing of detritus and rock are weaker,besides,the fluid pressures are higher and can easily produce more microfractures. Therefore,they become the major path for primary migration of the mature hydrocarbon.

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Reference (16)

[1]	LeythaeuserD, MackenzieA, SchaeferR G, et al.A novel approach for recognition and quantification of hydrocarbon migration effects in shale-sandstone sequences.AAPGBulletin,1984, 68(2):196～219
[2]	田世澄,孙尚如.油气初次运移的地球化学效应及排烃类型.地球科学-中国地质大学学报,1990, 15(1):75～86[TianShicheng, Sun Shangru. Geochemical effect and expulsion type of primary migration of petroleum.Earth Science-Journal of China University of Geosciences, 1990, 15(1):75～86]
[3]	李明诚.石油与天然气运移.北京:石油工业出版社,1994.32～89[Li Mingcheng. Migration of oil and gas. Beijing: Petroleum Industry Press,1994.32～89]
[4]	郝石生,柳广弟,黄志龙,等.油气初次运移的模拟模型.石油学报,1994,15(2):21～30[Hao Shisheng, Liu Guangdi, Huang Zhilong, et al. Simulation models for primary hydrocarbon migration.Acta Petrolei Sinica,1994,15(2):21～30]
[5]	Rudkiewicz J L,BeharF. Influence of kerogen type and TOC content on multiphase primary migration. Organic Geochemistry,1994, 21(2):121～133
[6]	DickeyP A. Possible primary migration of oil from source rock in oil phase. AAPG Bulletin,1975, 59(2):337～345
[7]	Magara K. Possible primary migration of oil globules. Journal of Petroleum Geology,1981,3(3):325～331
[8]	陈荷立,汤锡元.油气初次运移的研究现状.见:石油地质译文选,第2集.北京:石油工业出版社,1987.1～17[Cheng Heli, Tang Xiyuan. Current research on primary migration of oil and gas. In: Selections Ⅱof translated text on petroleum geology.Beijing:Petroleum Industry Press,1987,1～17]
[9]	王行信.蒙脱石的成岩演变与石油的初次运移. 沉积学报,1985,3(1):81～91[Wang Xingxin. Diagenetic evolution of montmarillonite and primary migration of petroleum.Acta Sedimentologica Sinica, 1985,3(1):81～91]
[10]	苗建宇,祝总祺,刘文荣,等. 泥岩有机质的赋存状态及其对泥岩封盖能力的影响.沉积学报,1999,17(3):478～482[Miao Jianyu, Zhu Zongqi, Liu Wenrong, et al. Occurrence of organic matter and its effect on sealing ability of argillaceous rock. Acta Sedimentologica Sinica, 17(3):478～481]
[11]	MagaraK. Comparsion of porosity-depth relationships of shale and sandstone. Journal of Petroleum Geology,1980,3(2):175～185
[12]	Robert R Berg, Anthony F Gangi.Primary migration by oil-generation microfracturing in low-permeability source rocks: application to the Austin chalk, Texas. AAPG Bulletin, 1999, 83(5):727～756
[13]	赵杏媛. 如何全面认识粘土矿物在初次运移中作用的探讨.沉积学报,1990,8(2):67～73[Zhao Xingyuan. Discussion on the effect of clay minerals in primary migration of petroleum.Acta Sedimentologica Sinica,1990,8(2):67～73]
[14]	彭大钧,李仲东,刘兴材,等.济阳盆地沉积型异常高压带及深部油气资源的研究.石油学报,1988, 9(3): 9～17[Peng Dajun,Li Zhongdong,Liu Xingcai, et al. A study of depositional type abnormally high pressure zone and deep oil-gas resources in Jiyang basin. Acta Petrolei Sinica, 1988,9(3): 9～17].
[15]	陈荷立,汤锡元.山东东营凹陷泥岩压实作用及油气初次运移问题的探讨.石油学报,1983,4(2):9～16[Cheng Heli, Tang Xiyuan. A discussion on the compaction of argillaceous rocks and migration of oil and gas in Dongying sag Shandong province. Acta Petrolei Sinica,1983,4(2):9～16]
[16]	Momper J A. Oil migration limitations suggested by geological and geochemical considerations. AAPG. Continuing Education Course Note Series 8, 1978

Relationship betweenOccurrence of Organic Matter and the Primary Migration of the Hydrocarbon in Argillaceous Rock

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