气候变化领域集成服务门户(CCPortal): The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity

CCPortal

DOI	10.1029/2020JB020435
	The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity
	Fender T.D.; Van Der Land C.; Rouainia M.; Graham S.P.; Jones D.M.; Vane C.H.; Wagner T.
发表日期	2020
ISSN	21699313
卷号	125 期号:12
英文摘要	Quantification of risk to seal integrity in CCS, or gas extraction from hydraulic fracturing, is directly affected by the accessibility of organic pores within organic rich mudrocks. Knowledge of the host organic matter's mechanical properties, which are influenced by depositional environment and thermal maturity, are required to reduce operational risk. In this study we address the effect of both depositional environment and maturity on organic matter Young's modulus by means of Atomic Force Microscopy Quantitative ImagingTM, which is a nondestructive technique capable of nanomechanical measurements. Shales from varying marine depositional environments covering kerogen Types II (Barnett), IIS (Tarfaya), and II/III (Eagle Ford/ Bowland) are analyzed to capture variance in organic matter. The findings show organic matter has a Young's modulus ranging between 0.1 and 24 GPa. These marine shales have a bimodal distribution of Young's modulus to some degree, with peaks at between 3–10 and 19–24 GPa. These shales exhibit a trend with maturity, whereby Young's modulus values of <10 GPa are dominant in immature Tarfaya shale, becoming similar to the proportion of values above 15 GPa within the oil window, before the stiffer values dominate into the gas window. These peaks most likely represent soft heterogeneous aliphatic rich kerogen and stiff ordered aromatic rich kerogen, evidenced by the increase in the stiffer component with maturity and correlated with 13C NMR spectrocopy. These findings enable increased realism in microscale geomechanical fracture tip propagation models and may allow direct comparison between Young's modulus and Rock-Eval parameters. ©2020. The Authors.
英文关键词	atomic force microscopy; geomechanics; organic matter; shale; Young's modulus
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187472
作者单位	School of Natural and Environmental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom; School of Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom; British Geological Survey, Nottingham, United Kingdom; Lyell Centre, Heriot Watt University, Edinburgh, United Kingdom
推荐引用方式 GB/T 7714	Fender T.D.,Van Der Land C.,Rouainia M.,et al. The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity[J],2020,125(12).
APA	Fender T.D..,Van Der Land C..,Rouainia M..,Graham S.P..,Jones D.M..,...&Wagner T..(2020).The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity.Journal of Geophysical Research: Solid Earth,125(12).
MLA	Fender T.D.,et al."The Assessment of Organic Matter Young's Modulus Distribution With Depositional Environment and Maturity".Journal of Geophysical Research: Solid Earth 125.12(2020).