Simulation of unconventional well tests with the finite volume method

Cancelliere, Michel; Verga, Francesca

doi:10.1007/s12182-001-0215-6

Cited by 9 publications

(5 citation statements)

References 32 publications

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“…Well testing is a valuable source of information on reservoir properties and a lot of work has been done and is being performed in this realm (Kruseman and Ridder, 1990;Horne, 1995;Fetter, 2001;Bourdet, 2002;Gringarten, 2008;Fokker et al, 2005;Beretta et al, 2007;Benetatos and Viberti, 2010;Viberti, 2010;Verga et al, 2011;Cancelliere and Verga, 2012). Two issues remain which need further attention in well test analysis: the inclusion of reservoir heterogeneity and the treatment of rate variations.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Periodic Pumping Tests in Wells Penetrating a Heterogeneous Aquifer

Fokker¹,

Renner²,

Verga³

2013

American Journal of Environmental Sciences

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This study investigated how to utilize multiple frequency components of pressure data from periodic pulse tests to estimate the intra-well permeability and compressibility distribution and also the presence of heterogeneities in a real field case. Periodic well testing is a technique in which injection or production pulses of a fluid are applied to a well in a periodic fashion. One of its main advantages is that ongoing operations do not have to be interrupted during the test as the superposed harmonic components can be identified using Fourier analysis. Further, modeling calculations are much faster than calculations in the time domain as no time-stepping is required and only the frequencies observed in the test need to be evaluated. We applied an earlier developed numerical code in the frequency domain to evaluate periodic-test results in a shallow aquifer and obtained a good match between data and calculations. The interpreted formation heterogeneity is in line with the local geology. Joints of various orientations constitute the main hydraulic conduits of the tested subsurface but they do not directly connect the wells. Thus communication between the wells has to be established through low-permeability features. The interwell periodic testing has corroborated the geological understanding of the aquifer and helped understanding the fluid flow pattern.

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Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Periodic Pumping Tests in Wells Penetrating a Heterogeneous Aquifer

Fokker¹,

Renner²,

Verga³

2013

American Journal of Environmental Sciences

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“…In this section, we present a numerical model of two-phase flow for well test interpretation in a multiwell system firstly. When it comes to the differentiation of the partially differential flow equations, finite difference method [41][42][43][44][45][46][47][48] and finite volume method [49][50][51][52][53][54][55][56] are both commonly employed in solving fluid flow equation systems. However, in unstructured grids, formulating the finite volume method is much easier.…”

Section: Model Developmentmentioning

confidence: 99%

A Two-Phase Numerical Model of Well Test Analysis to Characterize Formation Damage in Near-Well Regions of Injection Wells

Zhang

Cheng

et al. 2021

Geofluids

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Formation damage usually occurs in near-well regions for injection wells completed in offshore oilfields under the development of line drive patterns. However, current works on characterizing the damage by well test analysis were basically focused on using single-phase analogy to solve two-phase flow issues, resulting in errors on the diagnosis and interpretation of transient pressure data. In this paper, we developed a two-phase model to simulate the pressure transient behavior of a water injection well in a multiwell system. To solve the model more efficiently, we used the finite volume method to discretize partially differential flow equations in a hybrid grid system, including both Cartesian and radial meshes. The fully implicit Newton-Raphson method was also employed to solve the equations in our model. With this methodology, we compared the resulting solutions with a commercial simulator. Our results keep a good agreement with the solutions from the simulator. We then graphed the solutions on a log-log plot and concluded that the effects of transitional zone and interwell interference can be individually identified by analyzing specific flow regimes on the plot. Further, seven scenarios were raised to understand the parameters which dominate the pressure transient behavior of these flow regimes. Finally, we showed a workflow and verified the applicability of our model by demonstrating a case study in a Chinese offshore oilfield. Our model provides a useful tool to reduce errors in the interpretation of pressure transient data derived from injection wells located in a line drive pattern.

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“…As a consequence, injection tests eliminate emissions during reservoir appraisal and, except for fluid sampling, can provide all the information needed to estimate the well productivity at a reasonably low cost and with a good degree of reliability (Levitan, 2002;Beretta et al, 2007). Since the physical phenomena characterizing injection test are different with respect to the conventional well test, numerical models capable to provide a reliable interpretation of the data have been developed over the last years (Verga et al, 2008;Cancelliere and Verga, 2012). An example of successful field experiences was presented in the study by Beretta et al (2006;.…”

Section: Injection Testingmentioning

confidence: 99%

Environmental Sustainability of Oil Industry

Rocca¹

2013

American Journal of Environmental Sciences

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Similarly to most industrial activities, the oil industry can affect the environment at several stages. The greatest impact is the release of waste into the environment in concentrations that are not natural. Virtually in all cases, the adverse impact can be minimized or eliminated through the implementation of a proper waste management plan. Over the past few years the oil industry has placed greater emphasis on minimizing the environmental impact of its operations in all the main phases of a hydrocarbon reservoir life: from appraisal to field development, from production and recovery to reservoir decommissioning. As a consequence, the oil industry is facing important technical challenges, approaching with great interest and expectation new emerging technologies, such as nanotechnologies and alternative solutions, like CO 2 underground storage. This study provides an overview of the most interesting solutions that have been proposed and critically highlights their potential benefits and drawbacks. The following paper focuses on some of the new approaches that have already changed the routine operation workflow, while others are currently being tested and may yet require further improvement.

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Simulation of unconventional well tests with the finite volume method

Cited by 9 publications

References 32 publications

Numerical Modeling of Periodic Pumping Tests in Wells Penetrating a Heterogeneous Aquifer

Numerical Modeling of Periodic Pumping Tests in Wells Penetrating a Heterogeneous Aquifer

A Two-Phase Numerical Model of Well Test Analysis to Characterize Formation Damage in Near-Well Regions of Injection Wells

Environmental Sustainability of Oil Industry

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