| Qingdao Institute of marine geology, China Geological Survey | Host |
| Citation: |
XIAO Guolin, CAI Laixing, GUO Xingwei, WU Guoqiang, DONG Heping, LI Baogang. DETAILED ASSESSMENT OF MESO-PALEOZOIC HYDROCARBON SOURCE ROCKS: IMPLICATIONS FROM WELL CSDP-2 ON THE CENTRAL UPLIFT OF THE SOUTH YELLOW SEA BASIN[J]. Marine Geology Frontiers, 2017, 33(12): 24-36. doi: 10.16028/j.1009-2722.2017.12004
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DETAILED ASSESSMENT OF MESO-PALEOZOIC HYDROCARBON SOURCE ROCKS: IMPLICATIONS FROM WELL CSDP-2 ON THE CENTRAL UPLIFT OF THE SOUTH YELLOW SEA BASIN
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Abstract
The well CSDP-2 is the first whole coring deep hole ever drilled on the Central Uplift of the South Yellow Sea Basin. It penetrated many sets of clastic and carbonate rocks from the Late Ordovician Formation up to the Early Triassic Qinglong Formation unconformably under the Neogene. The data of organic abundance, organic types, thermal evolution history, soluble organic matter and hydrocarbon-generating intensity of the sequence confirms that on the Central Uplift there occurs three sets of effective hydrocarbon source rocks: the lipophilic limestone of the Upper Member of the Qinglong Formation, the mudstone of the Upper Ordovician up to the upper member of the Lower Silurian and the oil-gas type limestone of the Middle and Upper Members of the Carboniferous. The effective hydrocarbon source rocks that generated gas are mainly the mudstone and carbonaceous mudstone of the Dalong Formation-Longtan Formation, the stink limestone of Upper Qixia Formation which is rich in organic, limestone of middle-lower Carboniferous and the carbonaceous mudstone in the bottom of Carboniferous. The Mesozoic and Paleozoic total hydrocarbon-generating intensity revealed by the drilling is (20.7619-31.2839)×108m3gas equivalent/km2 and its gas-generating intensity is roughly comparable to large and medium-sized gas fields of the world. According to our calculation, the total oil-generating intensity of the oil source rock is (43.076-55.30)×104t/km2, and the total gas-generating intensity of gas source rock is (16.4543-25.7539)×108m3/km2. The total gas-generating intensity of source rocks is 4-5 times higher than the oil-generating intensity, and the hydrocarbon-generating intensity of clastic rocks is twice higher than that of limestone. High hydrocarbon-generating intensity and abundance of hydrocarbon source layers have provide sufficient materials for a medium-large oil and gas accumulation, showing a good oil and gas exploration prospect of the Mesozoic-Paleozoic in the region of the Central Uplift of the South Yellow Sea Basin.
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References
[1] 郭兴伟, 朱晓青, 宋世杰.大陆架科钻CSDP-2井在南黄海海相地层中首次钻遇油气显示[J].海洋地质与第四纪地质, 2015, 35(5):124. [2] 郭兴伟, 朱晓青,牟林, 等.南黄海中部隆起二叠纪-三叠纪菊石的发现及其意义[J].海洋地质与第四纪地质, 2017, 37(3):21-127. [3] 王东良, 李欣, 李书琴, 等.未成熟—低成熟煤系烃源岩生烃潜力的评价——以塔东北地区为例[J].中国矿业大学学报:自然科学版, 2001, 30(3):317-322. [4] 郝石生, 高岗, 王飞宇, 等.高过成熟海相烃源岩[M].北京: 石油工业出版社, 1996. [5] 钟宁宁, 秦勇.碳酸盐岩有机岩石学[M].北京:科学出版社, 1995. [6] 程克明, 王兆云, 钟宁宁, 等.碳酸盐岩油气生成理论与实践[M].北京:石油工业出版社, 1996. [7] 钟宁宁, 张枝焕.石油地球化学进展[M].北京:石油工业出版社, 1998. [8] 夏新宇.碳酸盐岩生烃与长庆气田气源[M].北京:石油工业出版社, 2000. [9] 梁狄刚, 张水昌, 张宝民, 等.从塔里木盆地看中国海相生油问题[J].地学前缘, 2000, 7(4):543-547. [10] 薛海涛, 卢双舫, 钟宁宁.碳酸盐岩气源岩有机质丰度下限研究[J].中国科学(D辑), 2004, 34(A01):127-133. [11] 陈建平, 梁狄刚, 张水昌, 等.中国古生界海相烃源岩生烃潜力评价标准与方法[J].地质学报, 2012, 86(7):1132-1142. doi: 10.3969/j.issn.0001-5717.2012.07.009 [12] 秦建中, 刘宝泉, 国建英, 等.关于碳酸盐烃源岩的评价标准[J].石油实验地质, 2004, 26(3):281-285. doi: 10.3969/j.issn.1001-6112.2004.03.012 [13] 薛海涛.碳酸盐岩烃源岩有机质丰度评价标准[M].北京:石油工业出版社, 2010. [14] 张善文, 隋风贵, 林会喜, 等.渤海湾盆地前古近系油气地质与远景评价[M].北京:地质出版社, 2009. [15] 侯读杰, 冯子辉.油气地球化学[M].北京:石油工业出版社, 2011. [16] 黄保家, 肖贤明, 董伟良.莺歌海盆地烃源岩特征及天然气生成演化模式[J].天然气工业, 2002, 22(1):26-32. doi: 10.3321/j.issn:1000-0976.2002.01.007 [17] 黄保家.莺-琼盆地天然气的成因特征及烃源岩生气潜力[C]//21世纪中国油气勘探国际研讨会论文集, 2002: 400-409. -
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XIAO Guolin, CAI Laixing, GUO Xingwei, WU Guoqiang, DONG Heping, LI Baogang. DETAILED ASSESSMENT OF MESO-PALEOZOIC HYDROCARBON SOURCE ROCKS: IMPLICATIONS FROM WELL CSDP-2 ON THE CENTRAL UPLIFT OF THE SOUTH YELLOW SEA BASIN[J]. Marine Geology Frontiers, 2017, 33(12): 24-36. doi: 10.16028/j.1009-2722.2017.12004
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Figure 1.
Tectonic subdivision of the South Yellow Sea Basin and location of well CSDP-2 (from reference [2])
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Figure 2.
Organic matter abundance of hydrocarbon source rock of well CSDP-2
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Figure 3.
Total hydrocarbon and chloroform "A" in muddy limestone of the Lower Triassic
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Figure 4.
Classification and evaluation by content of (S1+S2) and TOC in mudstone hydrocarbon source rocks
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Figure 5.
TOC distribution of dark mudstone hydrocarbon source rocks for the Longtan Formation of Permian
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Figure 6.
Classification of hydrocarbon source rocks by kerogen microscopic component of well CSDP-2
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Figure 7.
Chromatogram of saturated gas phase group of carbonate hydrocarbon source rocks in lower Triassic Qinglong Formation of well CSDP-2
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Figure 8.
Pr/nC17 and Ph/nC18 diagrams of well CSDP-2 showing source of organic matters of hydrocarbon source rocks
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Figure 9.
Chromatogram of saturated group of gas-phase in hydrocarbon source rock of well CSDP-2
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Figure 10.
Diagrams of thermal evolution of well CSDP-2
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Figure 11.
Diagram CPI versus OEP showing maturity of hydrocarbon source rocks of well CSDP-2