Experimental and Numerical Investigations of Waterflood Profiles with Different Well Configurations

Abstract

Experimental and numerical investigations of a waterflooding process with three different well configurations, vertical injection-vertical production (VI-VP), vertical injection-horizontal production (VI-HP), and horizontal injection-horizontal production (HI-HP), are studied here in a two-dimensional visualization cell with wells placed inside the porous medium. Water and oil profiles are tracked by mixing colored dyes that are soluble in only one phase. Experimental initial oil saturation distribution is supplied to the simulator using colored dye distribution by the Matlab image processing tool. The water flood profiles obtained by simulation using ECLIPSE are in reasonable agreement with experimental results. It is observed from experimental flood profiles that irreducible (connate) water distribution has an effect on the waterflood movement. It is seen that drawdown created by a vertical well is felt on the flood profile from the beginning of the waterflooding whereas this is not the case with the horizontal well. It is also observed that in case of the VI-VP configuration, the relative swept area is more.

Bioconversion of coal: new insights from a core flooding study

“…This will allow researchers to perform laboratory core ooding experiments, which are commonly conducted by petroleum reservoir engineers for studies related to the crude oil and gas recovery. [25][26][27][28][29] In such cases, the reservoir is mimicked by packing sand particles [27][28][29] or by using an actual core sample from the reservoir. 25,26,30 Such a technique provides an effective means to understand and quantify the oil/gas recovery process due to a ooding uid.…”

Field Validation of a Non-logging Alternative Method for the Prediction of the Location of Water-Cresting in Horizontal Wells for Water-Drive Reservoirs

“…For heavy oil reservoir, the problem of water-cresting becomes especially more severe due to the unfavorable mobility ratio . With the onset of water-cresting, the productivity of the well rapidly declines, , and in the worst case, it can lead to the well-being entirely flooded out . Currently, an assortment of mechanical and chemical well interventions is available involving chemical packers, − foam gel, cross-linked polymers, dual completion, inflow control devices, − and so forth.…”

Method of Predicting the Location of Water Cresting for Horizontal Wells in a Water-Drive Reservoir for Early Prevention

“…When early water breakthrough occurs in a water-drive reservoir with a vertical well, it is called coning; when it happens in a horizontal well, this phenomenon is called water cresting or cusping . When water cresting occurs in a gas- or oil-producing well, it can lead to rapid production decline and/or loss of well due to rise in the water-cut. − To save the well, currently there are various types of mechanical and chemical well intervention methods such as chemical packers, − foam gel, dual completion, and inflow control devices. − But prior to their application, the location of water cresting needs to be sited first with specialized logging tools. , These interventions, though effective, have a drawback for being a postbreakthrough procedure after water-cuts become very high and remediation cost is very expensive. Since coning or water cresting in a water-drive reservoir has become a more recognized problem, increasing amount of research has been devoted to this topic.…”