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GOR and LGR determinations from compressibility measurements

IP.com Disclosure Number: IPCOM000250231D
Publication Date: 2017-Jun-14
Document File: 1 page(s) / 40K

Publishing Venue

The IP.com Prior Art Database

Abstract

This paper discusses a method to generate real time gas-oil ratio (GOR) and liquid-gas ratio (LGR) values based on compressibility data during in well sampling.

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Title - GOR and LGR determinations from compressibility measurements Abstract – This paper discusses a method to generate real time gas-oil ratio (GOR) and liquid-gas ratio (LGR) values based on compressibility data during in well sampling.

There is a growing requirement for generating reservoir information as early as possible in the exploratory cycle. One such parameter of considerable importance to the reservoir engineer is the gas- oil ratio (GOR) of a typical black oil or bubble point hydrocarbon reserve identified during the exploratory step. The equivalent parameter for a condensate system is the liquid-gas ratio (LGR). Both the GOR and LGR are crucial parameters that will define the surface production equipment that will have to be installed, while also defining the monetization value of the reserve. As such, early determination of both these parameters is of considerable significance.

Modern sampling systems have a number of unique features, including a common nitrogen source for addressing the pressure maintenance needs of the collected samples. Essentially, every time there is a successful sample capture, the nitrogen pressure must fall. A gauge capable of monitoring this fall in nitrogen pressure can be used to deliver information of considerable importance. For example, nitrogen gauge readings in conjunction with real time telemetry to the surface, using for example an acoustic telemetry system, could be used to confirm successful sample capture in real time. Also important is the ability to relate the...