Please wait a minute...
Shopping Cart Email List Chinese
Advanced Search Fig/Tab
Frontiers in Energy

ISSN 2095-1701

ISSN 2095-1698(Online)

CN 11-6017/TK

Postal Subscription Code 80-972

2018 Impact Factor: 1.701

Featured Articles  |  Most Downloaded  |  Most Reading
Online Submission Subscribe to Our RSS Content Feed
Front. Energy    2019, Vol. 13 Issue (2) : 354-366    https://doi.org/10.1007/s11708-018-0581-z
RESEARCH ARTICLE
Discovery of Fuling Shale Gas Field and its prospects
Xusheng GUO(), Yuping LI, Jinlei LI, Minggang FENG, Hua DUAN
Exploration Branch, Sinopec, Chengdu 610041, China
 Download: PDF(3505 KB)   HTML
 Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

A series of breakthroughs have been made in the understanding, evaluation, and exploration of shale gas from discovery, environmental protection to efficient exploration in the discovering of Fuling Gas Field. By revealing the positive correlation between organic carbon content and siliceous mineral content of shale deposited in deep shelf, dynamic preservation mechanism of “early retention and late deformation,” it is clarified that the shales deposited in deep shelf are the most favorable for shale gas generation, storage and fracturing. The preserving conditions determine the levels of shale gas accumulation, thus the evaluation concept of taking the quality of the shale as the base and the preserving conditions as key is proposed, the evaluation system for strategic selection of favorable zones is established for marine shale gas exploration in Southern China. Moreover, the “sweet point” seismic forecasting technologies for marine shale gas, the “six properties” logging technologies for evaluating shale gas layers, the technologies for quick and efficient drilling of horizontal well groups, and the fracturing technologies for composite fractures for horizontal wells are invented. The paper discussed the exploration prospect of shale gas in the shales of Wufeng-Longmaxi Formation in great depth in Sichuan Basin, shale gas exploration in the outer region of the south, and continental shale gas exploration in China.
Keywords shale gas      accumulation laws      exploration technologies      Longmaxi Formation      Fuling Shale Gas Field      Sichuan Basin     
Corresponding Author(s): Xusheng GUO   
Just Accepted Date: 13 August 2018   Online First Date: 18 September 2018    Issue Date: 04 July 2019
 Cite this article:   
Xusheng GUO,Yuping LI,Jinlei LI, et al. Discovery of Fuling Shale Gas Field and its prospects[J]. Front. Energy, 2019, 13(2): 354-366.
 URL:  
https://academic.hep.com.cn/fie/EN/10.1007/s11708-018-0581-z
https://academic.hep.com.cn/fie/EN/Y2019/V13/I2/354
Fig.1  Correlations between TOC and siliceous contents of shales from Wufeng Formation-Longmaxi Formation in Well JY1 in Fuling Shale Gas Field
Fig.2  Diagram showing TOC, siliceous living creatures and environment judgment of Wufeng Formation-Longmaxi Formation in south-western part of Sichuan Basin (Xiliao Outcrop Profile)
Fig.3  Bitumen pores by crude oil cracking in Longmaxi Formation in Fuling Area
Fig.4  Mode for pressure relief due to structural uplift of carbonic shales from Longmaxi Formation in Well JY1
Fig.5  Curves of porosity, permeability and effective stress of shales at depth 2566.96 m in Well JY2
Fig.6  Relationship between gas contents and pressure coefficients in key shale gas exploration wells in Fuling Shale Gas Field and its neighbor areas
Type/Weight Parameter Weight Point
1.0–0.75 0.75–0.5 0.5–0.25 0.25–0
Quality of mudstones/0.3 Thickness/m 0.1 >40 40–30 20–30 10–20
TOC/% 0.3 >4 4–2 2–1 <1
Kerogen type 0.1 Type Ⅰ Type Ⅱ1 Type Ⅱ2 Type Ⅲ
Maturation(Ro) 0.1 1.2–2.5 1.0–1.2 or 2.5–3.0 0.7–1.0 or 3.0–3.5 0.4–0.7 or 3.0–4.0
Brittle index/% 0.3 >60 60–40 40–20 <20
Geophysical properties/% 0.1 >6 6–4 4–2 <2
Preservation conditions
/0.4 		Faults 0.2 Undeveloped Few Developed Well developed
Structural pattern 0.1 Gentle folds Less gentle folds Relatively closed folds Closed folds
Pressure ratio 0.4 >1.5 1.5–1.2 1.2–1.0 <1.0
Cover rocks 0.1 Jurassic-Cretaceous Triassic Permian Silurian
Top and bottom layers 0.2 Very tight Tight Less tight Open/Unconformity
Commercial evaluations
/0.3 		Depth/m 0.2 1500–3500 3500–4500 >4500/500–1500 0–500
Resources (1×108 m3) 0.2 >500 200–500 100–200 <100
Production (1×104m3/km) 0.2 ≥10 3–10 0.3–3 ＜ 0.3
Surface conditions 0.1 Areas of plain+ hill>75% Areas of plain+ hill 50%–75% Dominated by low hills Dominated by mountains, plateau and swamp
Water system 0.1 Many rivers with reservoirs Less rivers with reservoirs nearby Water system undeveloped No great rivers
Market pipe net 0.1 Pipe net built Pipe net nearby Pipe net planned No market
Traffic 0.1 Covered by nation and provincial highways Covered half by provincial highways County highways Poor traffic
Tab.1  Evaluation on area favorable for marine shale gas exploration in southern China
Fig.7  Comparisons between Rickman brittle index and new brittle index by multiple parameter model
Fig.8  Sale Reservoirs judged by logging in Well JY1
Fig.9  Results of water saturation in shale reservoirs interpreted by logging in Well JY 5
Fig.10  Model of well structure with three levels
Fig.11  Hook-shape parallel cluster horizontal wells
Fig.12  Great three-axes physical simulation of shales
1 X S Guo. Enrichment Mechanism and Exploration Technologies in Jiaoshiba Area in Fuling Shale Gas Field. Beijing: Science Press, 2014 (in Chinese)
2 X S Guo, D F Hu, Z D Wen, et al. Major factors controlling the shale gas accumulation and high productivity in marine shales in the Lower Paleozoic of Sichuan Basin and its periphery: taking Wufeng-Longmaxi Formation as an example. Geology in China, 2014, 41(3): 893–901 (in Chinese)
3 X S Guo, D F Hu, Y P Li, et al. Analyses and thoughts on accumulation mechanism of marine and lacustrine shale gas: taking Longmaxi Formation and Da’anzhai Member of Ziliujing Formation in Sichuan Basin as examples. Earth Science Frontiers, 2016, 23(2): 18–28 (in Chinese)
4 H K Nie, R K Bian, P X Zhang, et al. Micro-types and characteristics of shale reservoirs of the Lower Paleozoic in southeastern part of Sichuan Basin and their effects on the gas contents. Earth Science Frontiers, 2014, 21(4): 331–343 (in Chinese)
5 X S Guo. Rules of two-factor enrichment for marine shale gas in Southern China: understandings from explorations and practices for shale gas in Longmaxi Formation in Sichuan Basin and its surrounding area. Acta Geologica Sinice, 2014, 8(7): 1209–1218 (in Chinese)
6 R B Liu. Typical features of the first giant shale gas field in China. Natural Gas Geoscience, 2015, 26(8): 1488–1498 (in Chinese)
7 Z Q Feng, D Liu, S P Huang, et al. Carbon isotopic compositions of shale gas in Longmaxi Formation of Silurian in the Changning Area, Sichuan Basin. Petroleum Exploration and Development, 2016, 43(5): 705–713(in Chinese)
https://doi.org/10.1016/S1876-3804(16)30092-1
8 C Barker. Calculated volume and pressure changes during the thermal cracking of oil to gas in reservoirs. AAPG Bulletin, 1990, 74(8): 1254–1261
9 D F Hu, H R Zhang, K Ni, et al. Preservation conditions and main controlling factors on shale gas in marine south-eastern part of Sichuan Basin. Natural Gas Industry, 2014, 34(6): 17–23 (in Chinese)
10 T J Li, H Liu, J X Liu, et al. Geological selection for prospect areas and methods for evaluations on resource Potentials. Journal of Southwest Petroleum University (Science& Technology Edition), 2011, 33(2): 28–34 (in Chinese)
11 D Z Dong, K M Cheng, S Q Wang, et al. Methods for evaluations on shale gas resources and application in Sichuan Basin. Natural Gas Industry, 2009, 29(5): 33–39 (in Chinese)
12 Y X Li, H K Nie, P Y You. Features of organic-rich shales and strategic selection of prospect areas in China. Natural Gas Industry, 2009, 29(12): 115–118 (in Chinese)
13 B J Fan, L Shi, X Q Pang. Characteristics of shale gas reservoirs and conditions for prospecting areas. Petroleum Geology and Recovery Efficiency, 2011, 18(6): 9–13 (in Chinese)
14 X S Guo, T L Guo, Z H Wei, et al. Thoughts on shale gas exploration and evaluations in southern China. Engineering and Science, 2012, 14(6): 101–105 (in Chinese)
15 J Z Zhao, C Q Fang, J Zhang, et al. Selection and evaluations on prospecting areas for shale gas exploration in China on the views of shale gas exploration and development in North America. Journal of Xi’an Shiyou University (Natural Science Edition), 2011, 26(2): 1–7 (in Chinese)
16 S Q Wang, S Y Wang, L Man, et al. Method for selection and evaluations on prospect areas and key parameters. Journal of Chengdu University of Technology (Science & Technology Edition), 2013, 40(6): 609–620 (in Chinese)
17 J Li, Y Gao, C Hua, et al. Enlightenments for building evaluation methods for selecting prospects areas for marine shale gas in South China by experiences of shale gas exploration in North America. Petroleum Geology and Recovery Efficiency, 2014, 21(4): 23–27 (in Chinese)
18 H L Løseth, M Wensaas, K Gading, K Duffaut, M Springer. Can hydrocarbon source rocks be identified on seismic data? Geology, 2011, 39(12): 1167–1170
https://doi.org/10.1130/G32328.1
19 R Rickman, M J Mullen, J E Petre, et al. A practical use of shale petrophysics for stimulation design optimization: all shale plays are not clones of the Barnett Shale. Society of Petroleum Engineers, 2008
20 Q R Passey, S Creaney, J B Kulla. A practical model for organic richness from porosity and resistivity logs. AAPG Bulletin, 1990, 74(5): 1777–1794
21 R K Mallick, S V Raju. Thermal maturity evaluation by parts of Upper Assam Basin, India. Organic Geochemistry, 1995, 23(10): 871–879
https://doi.org/10.1016/0146-6380(95)00088-7
22 J G Sun. Archie’s formula: historical background and earlier debates. Progress in Geophysics, 2007, 22(2): 472–486 (in Chinese)
23 X Y Li, R B Qin, C C Liu. Analyses on effects on calculating reservoir saturation by rock electrical parameters. Journal of Southwest Petroleum University (Science & Technology Edition), 2014, 36(3): 68‒195 (in Chinese)
24 Y G Li, Z Q Lu, L H Shi, et al. Studies saturation interpretation model based on variable rock-electro parameters. Well Logging Technology, 2015, 39(2): 181–195 (in Chinese)
25 X H Zhou. Drilling &completion techniques used in shale gas horizontal wells in Jiaoshiba block of Fuling Area. Petroleum Drilling Techniques, 2013, 41(5): 26–30 (in Chinese)
26 X H Zhou, Y B Zang. Application of “well factory” drilling technology in Fuling shale gas field. Petroleum Drilling Techniques, 2015, 43(3): 46–49 (in Chinese)
27 X Zhang, T X Jiang, C G Jia, et al. Studies on physical simulation of hydraulic fracturing of shale gas reservoirs. Petroleum Drilling Techniques, 2013, 41(2): 70–74 (in Chinese)
28 D H Zhou, F Z Jiao, C G Jia, et al. Large-scale multi-stage hydraulic fracturing technology for shale gas horizontal in Well JY1HF. Petroleum Drilling Techniques, 2014, 42(1): 75–80 (in Chinese)
29 Jr P D Schettler, C R Parmely, C Juniata. Contributions to total storage capacity in Devonian shales. In: SPE Eastern Regional Meeting. Lexington, Kentucky, 1991
https://doi.org/10.2118/23422-MS
30 K A Bowker. Recent development of the Barnett Shale play, Fort Worth Basin. West Texas Geological Society Bulletin, 2003, 42(6): 1–11
31 S L Montgomery, D M Jarvie, K A Bowker, et al. Missiissippian Barnett Shale, Fort Worth Basin, north-central Texas: gas shale play with Multitrillion Cubic Foot Potential. AAPG Bulletin, 2005, 89(2): 155–175
https://doi.org/10.1306/09170404042
32 J B Curtis. Fractured shale-gas systems. AAPG Bulletin, 2002, 86(11): 1921–1938
33 Y Z Huang, J L Huang, C M Ge, et al. Technical progresses are key factor promoting rapid development of shale gas exploration in United States. Natural Gas Industry, 2009, 29(5): 7–10 (in Chinese)
34 D Z Dong, C N Zou, J Z Li, et al. Potentials of shale gas resources and its exploration and development prospects. Geological Bulletin of China, 2011, 30(2‒3): 324–336 (in Chinese)
35 W Z Zhao, D Z Dong, J Z Li, et al. Potentials of shale gas resources and its future place in natural gas development in China. Engineering and Science, 2012, 14(7): 46–52 (in Chinese)
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed