Published February 2024, Pg. 19-23

Section: Well drilling

UOT: 622.276

DOI: 10.37474/0365-8554/2024-02-19-23

An initial production assessment of oil and gas in a specific field was carried out using nodal analysis and decline curve analysis

J.M. Eyvazov - Azerbaijan State Oil And Industry University

E.H. Shakarov - Azerbaijan State Oil And Industry University

Global petroleum consumption is on the rise, and conventional production from reservoirs is struggling to meet this increasing demand. As a result, it becomes imperative to exploit non-traditional resources. Unconventional resources are often characterized by their exceptionally low permeability. To tap into these resources, horizontal wells are drilled, and multiple hydraulic fractures are employed to establish reservoirs. Achieving economically viable production rates necessitates the efficient flow of hydrocarbons through these hydraulic fractures toward the wellbore. The analysis of production decline involves the examination of historical trends in well and reservoir performance, focusing on plots that display the relationship between production rate and time as well as cumulative production. In the petroleum industry, four techniques are commonly used to assess reserves: decline curve analysis, numerical simulation, material balance, and volumetric analysis. Decline curve analysis, utilizing the least squares method, is particularly effective in fitting a best-fit equation to a set of data points. By calculating the future rate at any desired time and determining reserves from a specific point to an economically viable period, this approach proves valuable for estimating critical parameters such as the initial decline rate (D), initial rate (qi), and the hyperbolic exponent (b). These values can then be graphed over time to illustrate the decline in production rates.

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