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Recovery of hydrocarbons from a mixture of hydrocarbons and drilling fluid by selective reaction of the drilling fluid leaving the hydrocarbon unaffected
Recovery of hydrocarbons from a mixture of hydrocarbons and drilling fluid by selective reaction of the drilling fluid leaving the hydrocarbon unaffected
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机译:通过钻井液的选择性反应从烃和钻井液的混合物中回收烃,而使烃不受影响
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摘要
A method of separating from a mixture of oil-based drilling fluid and sample of formation hydrocarbon, the liquid component of the drilling fluid, which method comprises treating, e.g. chemically, the mixture in a way that selectively substantially affects the liquid component of the drilling fluid, producing one or more treatment products, while leaving the formation hydrocarbon substantially unaffected; and separating the treatment products from the formation hydrocarbon, by solvent extraction. The liquid component of the drilling fluid conveniently comprises one or more esters (which do not occur in significant quantities in naturally occuring formation hydrocarbons) and which can be hydrolysed to give water-soluble products readily removable from the formation hydrocarbon. The invention is applicable to sampling of formation hydrocarbon using wireline formation testers or sampling tools.
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