Use of Permanent Resistivity and Transient-Pressure Measurement for Time-Lapse Saturation Mapping

Charara, Marwan; Manin, Y.; Bacquet, C.; Delhomme, J.P.

doi:10.2118/80433-pa

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…Marlinverno and Torres-Verdin (2000), Charara et al (2002), and Manin et al (2002) also used synthetic time-lapse resistivity data from a permanent array cemented outside of the casing with or without transient pressure measurements to monitor the water-injection fronts, while Alpak et al (2004c) applied the same synthetic data to estimate absolute permeability in different layers. Compared with previous studies, the study being reported has the following distinct features:…”

Section: Introductionmentioning

confidence: 99%

Characterization of Reservoir Heterogeneity Through Fluid Movement Monitoring With Deep Electromagnetic and Pressure Measurements

Zhan

Kuchuk

Al-Shahri

et al. 2010

SPE Reservoir Evaluation &Amp; Engineering

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This paper presents a novel technique to characterize detailed formation heterogeneity for a carbonate reservoir using measurements from electrode resistivity array (ERA), a wireline formation tester, and a permanent downhole pressure sensor. The ERA was installed on tubing in a barefoot well rather than permanently cemented outside the casing as in previous applications. This notable difference provided flexibility for device installation and operation but also introduced particular issues in the ERA data acquisition and interpretation. Furthermore, the ERA measurements were carried out in conjunction with low-salinity water injection and oil and water production in the same well. The primary finding presented in this paper is that the time-lapse ERA voltages near a source electrode showed unique characteristics that represented local formation heterogeneity. This localized sensitivity of ERA data allows detailed characterization of the formation heterogeneity within the length of the ERA string in the vertical direction and about 100 ft laterally around the wellbore. The scale size of the investigated formation heterogeneity is comparable to typical grid sizes used in current reservoir simulations. Models were developed to identify stratified permeability heterogeneities from the time-lapse ERA voltages. The stratified heterogeneity estimated from the ERA measurements was compared to and verified by openhole logs and core analyses data. The final heterogeneous reservoir model from the ERA was subsequently applied to a numerical simulation that integrated the dynamic fluid flow, salt transport, and electrode array responses for monitoring water-front movement and estimating multiphase formation properties. The history matching of the time-lapse ERA data confirmed the first pass estimates of the identified heterogeneities. terization and fluid movement monitoring (Belani et al. 2000;van Kleef et al. 2001). In the present study, the ERA technology was applied to the identification of formation heterogeneity in a typical Middle East carbonate reservoir. The notable difference between

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Section: Introductionmentioning

confidence: 99%

Characterization of Reservoir Heterogeneity Through Fluid Movement Monitoring With Deep Electromagnetic and Pressure Measurements

Zhan

Kuchuk

Al-Shahri

et al. 2010

SPE Reservoir Evaluation &Amp; Engineering

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“…Raghuraman and Ramakrishnan (2001) also combine in-situ permanent resistivity array measurements with cemented pressure-sensor data to constrain quantitatively fracture thickness, fracture absolute fluid permeability, and fracture porosity within an actual reservoir. Charara et al (2002) perform a numerical experiment to demonstrate the use of permanent resistivity and transient pressure measurements for time-lapse saturation monitoring. Wang and Horne (2000) integrate permanent resistivity sensor and production data to improve the estimation of spatial distributions of absolute fluid permeability.…”

Section: Introductionmentioning

confidence: 99%

Joint inversion of transient‐pressure and dc resistivity measurements acquired with in‐situ permanent sensors: A numerical study

2004

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We develop a quantitative methodology to interpret jointly in-situ transient pressure and dc resistivity measurements acquired in a hypothetical water injection experiment, with the goal of displacing oil in a hydrocarbon-bearing formation. The assumed measurement acquisition system consists of enforcing timevariable flow rates while injecting water into the surrounding rock formations, thereby producing a sequence of repeated transient pressure pulses. In-situ dc resistivity measurements are acquired at the end of every flowrate pulsing sequence. The objective of the experiment is to estimate the spatial distributions of absolute fluid permeability and electrical resistivity. Geophysical inverse theory is used to account for the presence of noisy measurements.Synthetic data with noise are inverted to assess the relative benefits of different types of sensor geometries in axisymmetric models of permeability and electrical resistivity. Results strongly suggest that cooperative inversion of in-situ transient pressure and dc resistivity measurements reduces nonuniqueness in the estimation of resistivity and absolute permeability governed by dynamic fluid-flow phenomena. This leads to a more accurate estimate of permeability and resistivity compared to separate inversion of each data type.

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Determination of In-situ Two-Phase Flow Properties through Downhole Fluid Movement Monitoring

Kuchuk

Zhan

et al. 2008

All Days

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In this paper, we present a novel method for in situ estimation of two-phase transport properties of porous media using time-lapse resistivity, pressure, and flow rate data from a permanent downhole Electrode Resistivity Array (ERA) and pressure, and a production logging tool. The primary objective of this Fluid Movement Monitoring (FMM) setup and experiment is to provide in-situ measurements required to determine multiphase flow properties, such as relative permeabilities and capillary pressures. Continuous monitoring of oil displacement by injected water in all the permeable zones was conducted in a carbonate reservoir in Saudi Arabia. The field experiment was divided into two stages:Selection of the well location, coring and logging, experimental setup and completion designs, cleanup, production profiles, pressure transient buildup tests, water injection and subsequent production of all injected water, and collection of all relevant data that include time-lapse pressure, production and injection profiles, and resistivity; andInterpretation of all the data acquired from different sources, development of algorithms/software to compute the movement of the injected fluid through the reservoir, and the inversion of multi-source and multi-physics measurements. This monitoring experiment was achieved through an integrated interpretation of different data sets such as transient drawdown/injection and drawdown/buildup tests, 3D deep resistivity, production and injection profiles, openhole log, and core measurements. This approach is new to the industry and the first field experiment for direct in situ determination of two-phase flow properties. The key outcome of this field experiment is a full verification of the permanent downhole resistivity array and pressure sensor experimental setup for estimating in-situ layer relative permeabilities and capillary pressure and monitoring water movement inside the formation. This allowed multiphase characterization of the formation around the measurement well to a radial depth of tens of meters.

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Use of Permanent Resistivity and Transient-Pressure Measurement for Time-Lapse Saturation Mapping

Cited by 6 publications

References 4 publications

Characterization of Reservoir Heterogeneity Through Fluid Movement Monitoring With Deep Electromagnetic and Pressure Measurements

Characterization of Reservoir Heterogeneity Through Fluid Movement Monitoring With Deep Electromagnetic and Pressure Measurements

Joint inversion of transient‐pressure and dc resistivity measurements acquired with in‐situ permanent sensors: A numerical study

Determination of In-situ Two-Phase Flow Properties through Downhole Fluid Movement Monitoring

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