Chichimene field is a heavy oil field located in the little deformed sector known as the "foreland ‘basin plains of Colombia. This field is located in Castilla La Nueva in the Meta Department in the east part of the country. Chichimene field was discovered by Chevron in 1969 with the drilling of Chichimene-1 well (CH-1), but it only started production in 1.985. Since 2.00 Ecopetrol S.A has been in charge for field operation. Chichimene field produces a medium crude oil (approximately 20 API) from cretaceous structures named K1 and K2, In 2.01 an extra heavy crude oil (range between 7 – 9 API) from a terciary (T2) formation named San Fernando started production with the CH-18 Well. Despite of the high density presented, the T2 crude oil is mobile at reservoir conditions due to an abnormally elevated reservoir temperature The interest formation corresponds to an elongated northwest direction tertiary anticline layer, the crude oil discovered in this structure is extra-heavy produced by severe biodegradation and evaporative fractionation processes, the depositional model is associated to a distal marine Cretaceous rock. Nowadays the San Fernando formation produces about 14,000 BOPD using electric submersible pumps (ESP) as artificial lift method. This paper reviewed the conditions of the reservoir (petrophysical model, PVT properties, Oil, water and gas production behavior), the physical property of the produced fluids and fluid characteristics of foamy oil properties, to establish an appropriate mathematical expression for modeling the performance of these extra-heavy oil wells.
*A quien debe dirigirse la correspondencia ResumenLa importancia del flujo multifásico se origina en que cuando el fluido producido se desplaza desde el yacimiento hacia la superficie, se libera energía tanto en el flujo vertical como en el flujo horizontal; esta energía o presión está inmersa en el fluido mientras está en el yacimiento. Por lo tanto, es necesario realizar un buen diseño de los equipos del pozo, líneas de flujo, estranguladores, separadores, y demás conexiones. Para un diseño óptimo, es necesario realizar un estudio detallado del comportamiento del flujo multifásico en cada componente. El presente artículo presenta el desarrollo de un Software que permite determinar mediante correlaciones y modelos mecanísticos los perfiles de presión y temperatura que se presentan a lo largo de las tuberías. El Software está desarrollado en una interfaz gráfica en lenguaje de programación Java y fue validado en el Software comercial PIPESIM. De esta manera se podrá estudiar más a fondo el comportamiento del flujo multifásico en tubería vertical y horizontal. Modeling and simulation of an unconventional lifting multiphase system ABSTRACThe importance of the multiphase flow is caused in that when the produced fluid is displaced from the reservoir to the surface, energy is released in both the vertical and horizontal flow; this energy or pressure is possessed by the fluid while it is in the reservoir. Therefore, it is required to make a good design teams well, flowlines, throttles, separators and other connections. For optimum design, it is necessary to conduct a detailed study of the behavior of multiphase flow in each component. This paper presents the software developed which allows determine through correlations and mechanistic models, the profiles of pressure and temperature that occur along the pipes. The software was developed in a graphic interface in Java programming language and was validated with PIPESIM commercial software. In this way it can be further studied the behavior of multiphase flow in vertical and horizontal pipe.
The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.
For transporting industry of natural gas by pipeline systems, it’s vital to guarantee the integrity of their lines, in order to decrease operational costs and prevent accidents that may damaging against people’s safety, the environment or the infrastructure itself. In this paper it’s presented the principal compounds from a technical study about principal net and its distribution branches to municipalities of the National System Transport of Natural Gas operated by the Colombian Natural Gas Company – Ecogas, (specifically the Cusiana - Porvenir – La Belleza, La Belleza - Cogua, La Belleza – Vasconia, Vasconia - Neiva and Vasconia - Cali gas lines, see Figure 1). The principal objective is evaluate the possible condensation of hydrocarbons fluids inside gas lines, due to compositional characteristics of the gas, the different topographical conditions along the gas line route and the actual and future operational conditions to be implemented in the system. The evaluation performed over this gas streams, generates transcendental information in the creation of safe operational limits that minimizing the existence of obstacle problems and damages over pipeline systems and process equipment, due to the presence of liquid hydrocarbons inside these flow lines. This article has been prepared in four sections in order to guarantee easy access to each one of the steeps involved in the study. Section one presents the compositional and thermodynamic analysis of feeding gas streams; in section two, its presented the required information for modeling gas lines with definition of the gas pipeline numerical simulation model in stable state; section three presents the sensitivity analysis for gas variation upon loading gas composition at the inlet point of the system, variation of the operational conditions (flow, pressure and gas temperature) and environment temperatures for the different inlet points (branches) with verification of compliance of the Unique Transport Regulation (Reglamento Único de Transporte – RUT) established by CREG (CREG, 1999); section four presents the recommended set up of adequate work schemes required to guarantee the non-existence of hydrocarbon fluid due condensation in the evaluated system.
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