Surgil ESIA Report - Volume III - EKN

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“O’ZLITINEFTGAZ” PC PFS “Surgil field complex costruction with valuable components retrieval” Figure 4 – GGS 3 area Volume 2. Part 1. EIS Project for Surgil field construction 44
“O’ZLITINEFTGAZ” PC PFS “Surgil field complex costruction with valuable components retrieval” According to results of hydraulic calculation, if the pipe diameter is 273х9mm and the collector maximum length is 3.8km, so the pressure loss makes 0.56MPa. Gas pressure and temperature at input in GS will make 7.24MPa and 39 0 С relatively. Gas collector Pressure – 10.78MPa Diameter – 273mm Length – 3.8km (each) At the given stage the anthropogenic impact will be expressed in use of the lands under construction of GGS and gas-field gathering mains, and also in emissions of gas combustion products in atmosphere on torches during purging of collectors sites (periodic and short-term). 2.6 Complex Gas Treatment Unit (CGTU) For gas transportation through the main gas pipelines there are necessary careful clearing and dewatering of gas from solid impurities, aggressive components and moisture as they promote quick deterioration of the expensive equipment and cause disturbances in the conditions of normal operation. It is offered to carry out gas treatment on CGTU located on the field area, by method of low-temperature separations (LTS) with gas cooling at the expense of its expansion in turbo-expander. Treatment of the hydrocarbonic condensate allocated during gas separation on the LTS plant, is offered to make by open system of condensate gathering. Condensate is exposed to step aeration (separation, degassing) on the condensate separation and aeration plant. Gas condensate completely disappears under atmospheric pressure, and represents a stable condensate by saturated vapors pressure. Prevention of hydrate formation in the LTS plants is carried out by input of hydrate inhibitor into gas stream through sprayer directed towards gas flow for the best inhibitor dispersion in the gas stream and maintenance of its contact with water. It is offered to use diethyleneglycol (DEG) as anti-hydrate inhibitor on the CGTU. Production which is produced on the CGTU will be nonsulfurous dry combustible natural gas meeting on quality requirements of state standard Oz’DSt 948:1999 and stable gas condensate, meeting requirements of standard TSt 39.0-02:2004. CGTU productivity is defined proceeding from conditions of gas extraction from the field by years (including the term of attainment of constant extraction and the period of constant extraction) taking into account necessary requirements for reservation of equipment capacity. Design productivity of CGTU makes 3.0·10 9 m 3 per year. Productivity of one technological line of LTS for gas is 3.0·10 6 m 3 /day. Plant inlet pressure is 7.24MPa, Volume 2. Part 1. EIS Project for Surgil field construction 45
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NATIONAL HOLDING COMPANY «UZBEKNEF
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