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A significant contribution to the natural gas production is delivered from massive reservoirs with bottom water of several unique fields of Western Siberia, confined to highly productive Cenomanian formation. Most of them are brownfields at low reservoir pressures. Despite the high permeability of the reservoirs, a strong heterogeneity in the distribution of reservoir pressure and elevation of the gas-water contact (GWC) is observed, which is not reproduced by full-scale flow simulation models. The purpose of this study was a comprehensive analysis of permeability data from various sources for one of such objects to explain the observed features of field development. The analysis of areal and vertical permeability distribution includes the results of well log interpretation (WLIR) by three methods in 81 wells over more than 250 m of reservoir thickness, and several tens of pressure build-up curves (PBU). The analysis made it possible to identify the main causes of the uneven distribution of pressure, GWC elevation, drainage of gas volumes associated with a multi-fold difference in the average permeability between the drilled central (dome) part of the site and on its periphery. As the gas is produced and the GWC shifts upward, the contrast in permeability of the drilled and un-drilled zones increases, and the most permeable intervals pass to the area below the GWC. It is for the first time for the long-developed highly productive gas reservoirs with bottom water in the Cenomanian formation that complex analysis of well logging data, field development control data, and 3D reservoir models has been used to justify interrelation between the inhomogeneity of gas drainage, reservoir pressure distribution and GWC advance and the distribution of permeability within the reservoir. The need for detailed geological analysis is shown for constructing a model of the reservoir properties distribution in the inter-well space to help localizing and activating the remaining gas volumes, which are greater than 440 billion m3 for the Medvezhye field alone.

1 Ñàðîâñêèé èíaeåíåðíûé öåíòð, Íèaeåãîðîäñêàÿ îáë., Äèâååâñêèé ðàéîí, Ñàòèñ, Ðîññèéñêàÿ Ôåäåðàöèÿ 2 Ãàçïðîì äîáû÷à Íàäûì, ßìàëî-Íåíåöêèé àâòîíîìíûé îêðóã, Íàäûì, Ðîññèéñêàÿ Ôåäåðàöèÿ alex.ryabov@saec.ru Ïîñòóïèëà â ðåäàêöèþ 17.04.2015Ïðåäñòàâëåíà ìåòîäîëîãèÿ ÷èñëåííîãî ìîäåëèðîâàíèÿ ýðîçèîííûõ ÿâëåíèé â òðóáîïðîâîäíîé ñèñòåìå ïðè ïðîòåêàíèè ñìåñè ãàçà, òâåðäûõ ÷àñòèö è ïëåíîê êîíäåíñàòà íà ñòåíêàõ òðóáû. Ìîäåëèðîâàíèå ýðîçèîííûõ ïîâðåaeäåíèé ÿâëÿåòñÿ àêòóàëüíîé òåìîé äëÿ íåôòåãàçîâîé ïðîìûøëåííîñòè, àòîìíîé ýíåðãåòèêè, à òàêaeå ïðåäñòàâëÿåò áîëüøîé íàó÷íûé èíòåðåñ êàê ñëîaeíàÿ êîìïëåêñíàÿ çàäà÷à îöåíêè ïðî÷íîñòè è ðåñóðñà òðóáîïðîâîäîâ. Ðåøåíèÿ ïðèêëàäíûõ çàäà÷ ñòðîÿòñÿ íà îñíîâå âû÷èñëèòåëüíûõ êîìïëåêñîâ STAR-CCM+ è Abaqus. Èñïîëüçóþòñÿ âñòðîåííûå â STAR-CCM+ ôèçè÷åñêèå ìîäåëè ëàãðàíaeåâûõ ÷àñòèö, aeèäêèõ ïëåíîê è ýðîçèîííîãî èçíîñà. Ïîêàçàíû çàâèñèìîñòè ñêîðîñòè ýðîçèîííîãî ïîâðåaeäåíèÿ îò ðàçìåðîâ è êîíöåíòðàöèè òâåðäûõ ÷àñòèö, îò òîëùèíû aeèäêèõ ïëåíîê â îñîáî îïàñíûõ ìåñòàõ òðóáîïðîâîäîâ − íà èçãèáàõ, â ìåñòàõ ïîâîðîòîâ è ðàñïîëîaeåíèÿ øòóöåðîâ. Ðåçóëüòàòû ÷èñëåííûõ èññëåäîâàíèé êà÷åñòâåííî ñîîòâåòñòâóþò ðàñïîëîaeåíèþ è ôîðìàì ýðîçèîííûõ ïîâðåaeäåíèé, íàáëþäàåìûõ ïðè ýêñïëóàòàöèè ðåàëüíûõ îáúåêòîâ.Êëþ÷åâûå ñëîâà: ÷èñëåííîå ìîäåëèðîâàíèå, ýðîçèÿ, òâåðäûå ÷àñòèöû, aeèäêèå ïëåíêè. ÂâåäåíèåÎñíîâíûå çàïàñû óãëåâîäîðîäîâ êðóïíåéøèõ ãàçîâûõ ìåñòîðîaeäåíèé, ðàçðàáàòûâàåìûõ â íàñòîÿùåå âðåìÿ íà ñåâåðå Çàïàäíîé Ñèáèðè, ïðèíàäëåaeàò ñåíîìàíñêèì çàëåaeàì, èìåþùèì ñëàáîñöåìåíòèðîâàííûå ïåñ÷àíûå êîëëåêòîðû. Äëÿ ýòèõ ìåñòîðîaeäåíèé õàðàêòåðíî íàëè÷èå ìåõàíè÷åñêèõ ïðèìåñåé â ïðîäóêöèè ñêâàaeèí, îñîáåííî â ïåðèîä ïîçäíåé ñòàäèè ðàçðàáîòêè.Ðàçðóøåíèå ñêåëåòà ïëàñòà è âûíîñ ïåñêà íà óñòüå ñêâàaeèíû ïðèâîäèò ê àáðàçèâíîìó èçíîñó íàçåìíîãî îáîðóäîâàíèÿ è ÿâëÿåòñÿ îäíîé èç îñòðûõ ïðîáëåì ýêñïëóàòàöèè ñêâàaeèí. Íà ðèñ. 1 ïðèâåäåíû äàííûå ïî èçìåíåíèþ ÷èñëà m ïåñêîïðîÿâëÿþùèõ ñêâàaeèí ìåñòîðîaeäåíèÿ «Ìåäâåaeüå» âî âðåìÿ åãî ýêñïëóàòàöèè. Êàê âèäíî èç ðèñóíêà, êîëè÷åñòâî òàêèõ ñêâàaeèí ñ1988 ïî 2010 ãîä óâåëè÷èëîñü áîëåå ÏÐÎÁËÅÌÛ ÏÐÎ×ÍÎÑÒÈ È ÏËÀÑÒÈ×ÍÎÑÒÈ, ò. 77, ¹ 3, 2015 ã.A methodology for numerical simulation of erosion phenomena in the piping system flows in gas mixtures, and solids particles and fluid film on the pipe walls is presented in this paper . Simulation of erosion damage is a hot topic for the oil and gas, nuclear industry, as well as of great scientific interest as complex problems for assessing the strength of pipelines. Solutions are built on the basis STAR-CCM + and Abaqus codes. Use built-in STAR-CCM + physical model Lagrangian

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