A study on assessment of hydrocarbon potential of the lignite deposits of Saurashtra basin, Gujarat （Western India）  

作　　者：Prakash K. Singh V. K. Singh P. K. Rajak Neeraj Mathur 

机构地区：[1]Coal and Organic Petrology Lab, Centre of Advanced Studyin Geology, Banaras Hindu University, Varanasi,Uttar Pradesh 221005, India [2]Centre of Excellence for Energy Studies, Oil India Limited,Rukminigaon, GS Road, Guwahati, Assam 781022, India

出　　处：《International Journal of Coal Science & Technology》2017年第4期310-321,共12页国际煤炭科学技术学报（英文）

摘　　要：In the present investigation, Bhavnagar lignites of the Saurashtra basin （Gujarat） have been studied to assess their hydrocarbon generating potential. The samples of upper as well as lower lignite seams have been studied through microscopy and subjected to various chemical analyses viz. proximate analysis, ultimate analysis and Rock-Eval Pyrolysis. These lignites have high moisture and low to moderate ash yield but are characterized by high volatile matter. Petro- graphically they comprise predominantly of huminite group maceral while liptinite and inertinite groups occur in sub- ordinated amount. Huminite is chiefly composed of detrohuminite and telohuminite. The Tma~ （av. 416.23 ~C） and huminite reflectivity （0.28%-0.30%） indicate a low degree of maturity for these lignites which is also substantiated by the T,n~~ versus hydrogen index plot. The organic matter is subjugated by kerogen Type-III with a potential to expel hydrocarbon on liquefaction. Study further reveals that the fixed hydrocarbon is several folds higher than the free hydrocarbons. Being high in reactive maceral content, a high ＇conversion＇ and good ＇oil yield＇ values for these lignites were observed. Thus, the empirically derived values match well with those obtained through the experimental values of Rock-Eval Pyrolysis and validate their hydrocarbon generating potential.

关 键 词：Saurashtra lignite. Reactive maceral - Rock-Eval. Hydrocarbon generating potential 

分 类 号：TD[矿业工程]