Abstract

Using as data base a group of correlations generated from Eastern Venezuela PVT Laboratory experiments, a group of "minimum limiting conditions" based on simple field production measurements are proposed which, production measurements are proposed which, when met simultaneously, guarantee that the produced fluid stream is a gas condensate at reservoir conditions. It was also concluded that for each of the selected production parameters there is a "Transition Zone parameters there is a "Transition Zone in which the production stream can be a volatile oil or a gas condensate at reservoir conditions. It is concluded that the proposed method to define the existance of such gas condensates is very important for Eastern Venezuela since it expands the typical ranges that several authors have indicated to clasify the produced fluids as gas condensates at reservoir conditions.

A. Introduction

In the process of studying the Eastern Venezuela reservoirs it is a very common situation to have the need to achieve adequate characterization of the phase behavior for the fluids originally in place in such reservoirs. In many fluids cases for the Traditional Producing Areas, the first issue to be resolved is to define if the produced fluid is a conventional black oil, volatile oil, or gas condensate.

The main objective of this paper is to present a method to delimiter the type of fluids at initial reservoir conditions. Since the proposed method or procedure is proposed method or procedure is based on common production parameters of the petroleum industry, parameters of the petroleum industry, the engineers can easily define the nature of the fluids in each case under review.

This method is proposed after a comprenhensive literature search as well an in-depth review of a significant group of PVT laboratory experiments available for Eastern Venezuela.

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