Diamondoids and biomarkers: As a tool to better define the effects of thermal cracking and microbial oxidation on oils/condensates from reservoirs of the Upper Indus Basin, Pakistan
作者： Muhammad Irfan Jalees , Thomas S. Bianchi , Roger Sassen , Fazeelat Tahira
DOI: 10.1007/S13146-011-0042-9
关键词: Petroleum 、 Structural basin 、 Oil field 、 Organic matter 、 Environmental chemistry 、 Maturity (geology) 、 Mineralogy 、 Mineral resource classification 、 Diamantane 、 Diamondoid 、 Geology
摘要: The present study examined crude oils and condensates from 12 productive oil field zones in the Upper Indus Basin, Pakistan, located at 33°11′00″N to 33°56′00″N 73°10′00″ 73°56′00″E. These belonged Eocene, Paleocene, Jurassic ages. GC GC–MS parameters revealed that these samples were mature contained marine algal/bacterial organic matter sources an oxidizing environmental/dysoxic environment. total methyladamantanes/admantane ratio varied 4.05 15.25 showed increasing levels of microbial oxidation. diamantane/adamantane 1.14 3.06, methyldiamantanes/diamantane also supports results. degree classification oxidation different best defined by plotting American Petroleum Institute gravity versus diamondoid concentrations. Diamondoid indicated a maturity but based on particular parameter used, which considerably. This further demonstrated utilization both biomarkers diamondoids provided approach for determining level condensates.
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