Monitoring of condensate flows with a view to improving the quality of the odorant at U-30 of the OGPP

Abstract

Currently, mercaptans are produced synthetically both in the domestic and foreign industry, which makes them cost high. The formation fluid of the Orenburg and Karachaganak fields processed at the Orenburg GPP is a rich raw material source of low-boiling natural mercaptans. Currently, the composition of the odorant is impermanent. It differs in the limits of boiling and the mixture ratios of natural mercaptans. The composition of the synthesized odorant includes a mixture of mercaptans from C1 to C4 and higher. The presence of methylmercaptan is undesirable as it reduces the intensity of the gas smell. In addition, the presence of heavy mercaptans from C4 and higher is also undesirable as they tend to hydrate formation. Since only C2-C3 mercaptans are to be present in the odorant, there arose a problem of removing or reducing the unwanted mercaptans. To solve this problem, an analysis of the flow of condensates entering the U-30 was carried out in order to obtain a quality odorant. The quality of the produced odorant was improved by the exception and selection of the optimal ratio of incoming condensate flows. The research is aimed at improving the quality of the odorant derived at the U-30 facility of the Orenburg GPP from light condensate fractions, where there is used a mixture of internal condensates from facilities U-741 (installation of condensate stabilization BX-04), U-374 (fractionation department of gas treatment plant E-18), U-40 (propane blocks, condensate of dehydration), U-11 (regeneration unit glagola, condensate of dehydration) after stabilizing at U-09 (hydrocarbon condensate processing plant), and also the absorbent from U-90 (plant for production of broad fraction of light hydrocarbons).