Main pageFeedbackSite map
Search:
 

News Subscription
Your e-mail:
Modify subscription





Questionnaire










Hydrate inhibitor flow profile model for field pipelines



Buznikov N.A., Istomin V.A., Mitnitskiy R.A. (OOO Gazprom VNIIGAZ, RF, Moskovskaya obl.)

E-mail: V_Istomin@vniigaz.gazprom.ru

OLGA software proved useful under study of hydrate inhibitor (methanol and diethyleneglycol) flow profile in a field pipeline designed for Cenomanian gas. Inhibitor build-up tends to occur under lower gas rates, in pipeline depression area segments, while inhibitor rate appearing relatively low. The authors show that under liquids accumulation conditions, major inhibitor outflow appears to be extremely uneven, with around several day long periods. Under transition from liquid accumulation to outflow, inhibitor propagation rate tends to rise, followed by steady-state concentration across pipeline length after it is filled by inhibitor. It was found that under liquid accumulation, diethyleneglycol propagation time across the line appears shorter than for methanol in water, while the pipeline filling time remaining immune to inhibitor type under greater gas flow rates.

References

1. Rotov A.A., Trifonov A.V., Istomin V.A., Nazarov O.V. Analiz dvizheniya metanola v truboprovodakh gazosbornykh setey [Analysis of methanol dynamics in gas gathering pipeline systems]. Avtomatizatsiya, telemekhanizatsiya i svyaz v neftyanoy promyshlennosti, 2011, no. 6, pp. 2629.
2. Buznikov N.A., Suleymanov V.A. Dinamika nakopleniya i vynosa vodnogo rastvora ingibitora gidratoobrazovaniya pri nachalnom zapolnenii morskogo truboprovoda [Aqueous hydrate inhibitor accumulation and removal profiles under offshore pipeline initial filling]. Gazovaya Promyshlennost Gas Industry, 2014, no. 8, pp. 3437.
3. Ellul I.R., Asi S.R. Can dynamic complex multiphase phenomena be modeled? Proceeding of 42th PSIG Annual Meeting. Napa Valley, California, USA, 2011, Report No. 1117.
4. Belt R., Djoric B., Kalali S., Duret E., Larrey D. Comparison of commercial multiphase flow simulators with experimental and field databases. Proceeding of 15th International Conference on Multiphase Production Technology. Cannes, France, 2011, Report No. BHR-2011-I2.
5. Pˆeneloux A., Rauzy E., Frˆeze R. A consistent correlation for RedlichKwongSoave volumes. Fluid Phase Equilibria, 1982, vol. 8, no. 1, pp. 723.



Back to the section