Citation: | Jian-qiang Wang, Jian-ming Gong, Li Zhang, Hai-yan Cheng, Jing Liao, Jian-wen Chen, Jing Su, Chuan-sheng Yang, 2018. Discussion on “sandwich” structures and preservation conditions of shale gas in the South Yellow Sea Basin, China Geology, 1, 485-492. doi: 10.31035/cg2018064 |
In order to make a breakthrough in Mesozoic-Paleozoic shale gas exploration in the South Yellow Sea Basin, a comparison of the preservation conditions was made within the Barnett shale gas reservoirs in the Fortworth Basin, the Jiaoshiba shale gas reservoirs in Sichuan Basin and potential shale gas reservoirs in Guizhou Province. The results show that the “Sandwich” structure is of great importance for shale gas accumulation. Therein to, the “Sandwich” structure is a kind of special reservoir-cap rock assemblage which consist of limestone or dolomite on the top, mudstone or shale layer in the middle and limestone or dolomite at the bottom. In consideration of the Mesozoic-Paleozoic in the Lower Yangtze, and Laoshan Uplift with weak Paleozoic deformation and thrust fault sealing on both flanks of the Laoshan Uplift, a conclusion can be drawn that the preservation conditions of shale gas probably developed “Sandwich” structures in the Lower Cambrian and Permian, which are key layers for the breakthrough of shale gas in the South Yellow Sea. Moreover, the preferred targets for shale gas drilling probably locate at both flanks of the Laoshan Uplift.
[1] | Bowker K A. 2003. Recent development of the barnett shale play, Fort Worth Basin. West Texas Geological Society Bulletin, 42(6), 4–11. |
[2] | Bowker K A. 2007. Barnett Shale gas production, Fort Worth Basin: Issues and discussion. AAPG Bulletin, 91(4), 523–533. doi: 10.1306/06190606018 |
[3] | Fu N, Liu YL, Xiong BH, Li YCH. 2003. An analysis of abnormal geochemical parameters of Palaeozoic source rocks in CZ35-2-1 well, the Southern Yellow sea. China Offshore oil and gas (Geology), 17(2), 93–98. |
[4] | Gambacorta G, Trincianti E, Torricelli S. 2016. Anoxia controlled by relative sea-level changes: An example from the Mississippian Barnett Shale Formation. Palaeogeography, Palaeoclimatology, Palaeoecology, (459), 306–320. |
[5] | Gong JM, Wang JQ, Li XY, Wang J, Chen JW, Yang YQ, Li G. Jiang YB. 2013. Exploration targets of Paleozoic shale gas at the Laoshan Uplift, South Yellow Sea. Marine Geology & Quaternary Geology, 33(6), 115–120. |
[6] | Gou YH, Li ZF, Li DH, Zhang TM, Wang ZC, Yu JF, Xi YT. 2004. Lithofacies palaeogeography of the Early Silurian in Sichuan area. Journal of Palaeogeography, 6(1), 21–29. |
[7] | Guo TL, Zhang HR. 2014. Formation and enrichment mode of Jiaoshiba shale gas field in Sichuan Basin. Petroleum exploration and development, 41(1), 28–36. |
[8] | Liang CH, Jiang ZX, Cao YC, Zhang JC, Guo L. 2017. Sedimentary characteristics and paleoenvironment of shale in the Wufeng-Longmaxi formation, North Guizhou Province, and its shale gas potential. Journal of Earth Science, 28(6), 1020–1031. doi: 10.1007/s12583-016-0932-x |
[9] | Liang J. 2014. Tectonic effects on the reservoir in Qinglong Formation of the South Yellow Sea Basin. Marine Geology Frontiers, 30(10), 57–61. |
[10] | Lin LB, He Q, Yu Y, Dan Y, Peng YM. 2014. Development characteristics and sealing effectiveness of Lower Cambrian gypsum rock in Sichuan Basin. Acta Petrologica Sinica, 30(3), 718–726. |
[11] | Liu YW. 2016. The northern Guizhou A Page 1 well to achieve a major breakthrough in oil and gas survey. China Mining News, . |
[12] | Maria-Fernanda Romero-Sarmiento, Jean-Noël Rouzaud, Sylvain Bernard, Damien Deldicque, Michel Thomas, Ralf Littke. 2014. Evolution of Barnett Shale organic carbon structure and nanostructure with increasing maturation. Organic Geochemistry, (71), 7–16. |
[13] | Mohamed O, Roger MS. 2011. Shale depositional processes: Example from the Paleozoic Barnett Shale, Fort Worth Basin, Texas, USA. Central European Journal of Geosciences, 3(4), 398–409. |
[14] | Nie HK, Zhang JC, Zhang PX, Song XW. 2009. Shale gas reservoir characteristics of Barnett Shale gas reservoir in Fort Worth Basin. Geological Science and Technology Information, 28(2), 87–93. |
[15] | Pan SQ, Zou CN, Yang Z, Dong DZ, Wang YM, Wang SF, Wu ST, Huang JL, Liu Q, Wang DL, Wang ZY. 2015. Methods for shale gas play assessment: a comparison between Silurian Longmaxi Shale and Mississippian Barnett Shale. Journal of Earth Science, 26(2), 285–294. doi: 10.1007/s12583-015-0524-0 |
[16] | Wan HC, SunW, Liu SG, Ran B, Ye YH, Wang SY, Luo C, Tian MN. 2012. General situation and prospect evaluation of the shale gas in Wufeng-Longmaxi Formation of Sichuan Basin and surrounding areas. Journal of Chengdu University of Technology (Science & Technology Edition), 39(2), 176–181. |
[17] | Wang ZG. 2015. Breakthrough of Fuling shale gas exploration and development and its inspiration. Oil & Gas Geology, 36(1), 1–6. |
[18] | Wang JQ, Sun J, Xiao GL, Wu ZQ, Li SL. 2014. Tectonic characteristics of the South Yellow Sea Basin and implications for petroleum geology. Marine Geology Frontiers, 30(10), 34–39. |
[19] | Wu YQ, Jin ZG, Cai XD. 2012. Evaluation on Resource Potential and Thoughts on Exploitation of Shale Gas from Guizhou Province, China. Acta Mieralogica Sinica, 32(4), 564–575. |
[20] | Wu YQ, Jin ZG, Cai XD. 2012. Evaluation on resource potential and thoughts on exploitation of shale gas from Guizhou Province, China. Acta Mieralogica Sinaca, 32(4), 569–575. |
[21] | Xu ZHY, Yao GS, LiangX, Xiong SY, HeY, Zhang JH, Wang GC, LiaoY. Shi YH. 2015. Shale gas preservation conditions in the Lower Paleozoic, Yangtzeblock. Petroleum Geology & Experiment, 37(4), 407–417. |
[22] | Yan DY, Huang WH, Lu XX, Yi XD, Shi YL. 2016. Contrast of reservoir-forming conditions of marine-continental transitional shale gas in different sedimentary environments in the Lower Yangtze area of China. Journal of China Coal Society, 41(7), 1779–1787. |
[23] | Yang RD, Cheng W, Zhou RX. 2012. Characteristics of organic-rich shale and exploration area of shale gas in Guizhou Province. Natural gas geoscience, 23(2), 340–347. |
[24] | Yang ZH, LI ZM, Wang GS, Teng GE, Shen BJ. 2010. Enlightenment from petrology character, depositional environment and depositional model of typical shale gas reservoirs in North America. Geological Science and Technology Information, 29(6), 59–64. |
[25] | Yuan Y, Chen JW, Zhang YX, Liang J, Zhang YG, Zhang PH. 2018. Tectonic evolution and geological characteristics of hydrocarbon reservoirs in Marine Mesozoic-Paleozoic strata in the South Yellow Sea Basin. J. Ocean Univ. China (Oceanic and Coastal Sea Research), 17(5), 1075–1090. |
[26] | Zeng XL, Liu SG, Huang WM, Zhang CJ. 2011. Comparison of Silurian Longmaxi Formation shale of Sichuan Basin in China and Carboniferous Barnett Formation shale of Fort Worth Basin in United States. Geological Bulletin of China, 30(2-3), 372–384. |
[27] | Zhai GY, Bao SJ, Pang F, Ren SM, Zhao FP, Zhang F, Zhou Z, Wang DL. 2016. Breakthrough of the Natural Gas of Paleozoic Marine Strata in Wuling Mountain Complex Tectonic Zone. Acta Geoscientica Sinica, 37(6), 657–662. |
[28] | Zhai GY, Wang YF, Zhou Z, Yua SF, Chen XL, Zhang YX. 2018. Exploration and research progress of shale gas in China. China Geology, (2), 257–272. |
[29] | Zhang CM, Zhang WS, Guo YH. 2012. Sedimentary environment and its effect on hydrocarbon source rocks of Longmaxi Formation in southeast Sichuan and northern Guizhou. Earth Science Frontiers, 19(1), 136–145. |
[30] | Zhang HQ, Chen JW, Li G, Wu ZQ, Zhang YG. 2009. Discovery from seismic survey in Laoshan Uplift of the South Yellow Sea and the significance. Marine Geology & Quaternary Geology, 29(3), 107–113. |
[31] | Zhang T, Yi HW, Jia D, Ding H. 2016. Geological comparison of silurian gaojiabian formation of lower Yangtze area and Middle Devonian Marcellus formation in the appalachian Basin in North America. Geological Journal of China Universities, 22(1), 152–158. |
[32] | Zhang XM, Shi WZ, Xu QH, Wang R, Xu ZH, Wang J, Wang CH, Yuan Q. 2015. Reservoir characteristics and controlling factors of shale gas in Jiaoshiba area Sichuan Baisn. Acta Petroleisinica, 36(8), 926–939. |
[33] | Zhuang JJ, Yang FL, Zhao WF. 2010. Tectonic characteristics and numerical stress field simulation in Indosinian-Early Yanshanian stage, Lower Yangtze Region. Geological Journal of China Universities, 16(4), 475–482. |
Schematic tectonic division map of the South Yellow Sea Basin. a–location map of South Yellow Sea Basin after Zhang HQ et al., 2009; Gong JM, et al., 2013. b–“Sandwich”structure of Hetang Form, the Lower Cambrian in the South Yellow Sea Basin; c–“Sandwich” structure of Longtang and Dalong Formation, the Upper Permian in the South Yellow Sea Basin; d–comprehensive stratigraphic column of marine strata in the Southern Yellow Sea; e–geological profile of Line A-A’.
Cross section of Newark East shale gas field (a, b) and the shale gas formation model with a sandwich structure (c) of the Barnett shale, Fort Worth Basin (after Nie HK et al., 2009; Bowker K A, 2003; Bowker K A, 2007).
Synthetic stratigraphic column of the Jiaoshiba area (after Zhang XM et al., 2015; Gou YH et al., 2004).
Black shale of the Lower Paleozoic in Guizhou, China (after Zhang CM et al., 2012).