Zhigang Chen
Postgraduate in China University of Petroleum, China
Title: The Calculation of Original Hydrocarbons-in-Place with Flowing Material Balance in the vertical-single fracature well gas reservoir
Biography
Biography: Zhigang Chen
Abstract
The determination of reserves is a fundamental calculation in reservoir engineering. The material balance method uses actual reservoir performance data and therefore is generally accepted as the most accurate procedure for estimating original hydrocarbons-in-place (OGIP). In order to generate a traditional material balance plot, the well is shut in at several points during its producing life to obtain the average reservoir pressure. The flowing material balance uses the concept of boundary-dominated flow or pseudo-steady-state flow, as well as flowing pressures and rates to calculate original hydro-carbons-in-place. This paper presents the OGIP calculation of vertical-single fracture gas reservoir with flowing material balance analysis. In this paper, firstly calculate the time of Boundary-Dominated Flow to begin, then combine the values of flowing p/z and Agarwal-Gardner flowing material balance only needs to estimate OGIP. The calculation only needs the data of flowing pressures and rates . The calculation results show that the method is simple and feasible to calculate OGIP of vertical-single fracture gas reservoir.