The Use of a Wireline Formation Tester with Dual Intake Inflatable Packers to Optimize Fluid Analysis in an Eastern Siberia Heavy Oil Field

Tsiklakov, Alexander; Weinheber, Peter; Wichers, Wicher Roelf; Zimin, Sergey; Oshmarin, Roman

doi:10.2118/146044-ms

Cited by 15 publications

(6 citation statements)

References 5 publications

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“…With respect to area open to flow, the standard dual packer spacing is 1 m. However, by implementing the dual-intake options (Tsiklakov, 2011b) we can increase that spacing to 1.6 m. The dual-intake has the additional benefit of being able to segregate the oil from the water in the dual packer interval. A pump connected to the upper inlet pumps off the lighter hydrocarbon phase and a second pump attached to the lower inlet pumps away the heavier water phase.…”

Section: Objectives and Challengesmentioning

confidence: 99%

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers

et al. 2014

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Unconventional hydrocarbon resources are becoming more and more important to the overall world energy picture and Russia is no exception. Heavy oil has long been an acknowledged asset but renewed efforts to replace the aging conventional resource base are focusing increased attention on this often neglected resource. Many of Russia's heavy oil fields were discovered 20-30 years ago and the formation evaluation data from these old exploration wells is often scanty. Quality fluid samples, especially, were almost impossible to obtain. Aside from the very high viscosity that almost precludes fluid movement, the reservoirs were often either unconsolidated sands with low failure strengths or, in rare cases, carbonates with extensive vug and fracture networks. However, with a renewed focus on these reservoirs, quality formation samples are a necessity.In this paper we show successful approaches using wireline formation testers to acquire heavy oil sample in two Lukoil fields in the Timan Pechora region: Varandeyskoe and Zapadno-Lekeiyaginskoe. These fields have many differences but two important similarities: very heavy oil and a vital need to understand the fluid properties.

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Section: Objectives and Challengesmentioning

confidence: 99%

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers

et al. 2014

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“…При опробовании нефте-и газонасыщенных интервалов в скважинах, пробуренных с растворами на водной основе, дополнительное преимущество дает использование двойного пакера с сегрегационным патрубком (Tsiklakov, 2011b). Особенностями данной конфигурации является увеличение межпакерного интервала с 1 до 1.6 м, а также наличие дополнительного верхнего входного порта (рис.…”

Section: вынос частиц породы из пластаunclassified

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers (Russian)

Blinov¹,

Weinheber²,

Ivashin³

et al. 2014

SPE Russian Oil and Gas Exploration &Amp; Production Technical Conference and Exhibition

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“…The dual intake (Tsiklakov, 2011) is a customized MDT dual packer module. This configuration has two inlet ports in the sampling interval, referred to as the upper and lower inlets.…”

Section: Dual Intake -Mdt Dual Packer Customizationmentioning

confidence: 99%

Integration of a Complex Log Data Suite for the Evaluation of Pokurskaya Formation in Western Siberia

et al. 2013

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The maintenance of Western Siberia oil production levels has required the industry to evaluate and develop ever more complex reservoirs. In this case study we look at the evaluation of the heavy oil bearing field located in the north part of Western Siberia and specifically the unconsolidated Pokurskaya formation of the Cenomanian age. The specific evaluation requirements included an understanding of the oil properties, especially viscosity and its variations, and an understanding of recovery factor by an analysis of residual oil saturation. In order to accomplish these objectives an extensive suite of log data was acquired including standard triple combo data, cross-dipole acoustic, NMR, micro-images, spectroscopy and formation tester samples and pressures.In this paper we show how an innovative use of NMR data allowed us to improve the fluid model and irreducible water saturation calculations. Combining NMR with standard data allowed a prediction of the residual oil saturation. Additionally, from the NMR data we were also able to extract oil viscosity information, however we needed a calibration point and for that a formation oil sample was required.Unconsolidated formations saturated with viscous oils are notoriously difficult to sample with formation testers. Sand production can lead to contaminated samples, tool plugging and even borehole collapse. To avoid these issues we included dipole sonic data to estimate formation strength in order to select the optimal sampling locations. Additionally a new 'dual intake' straddle packer configuration was used to optimize the fluid sampling. As a result of these precautions samples were successfully acquired and the resulting PVT data was used in field development planning as well as calibration points for a continuous NMR-derived viscosity curve. Advanced logging suite for Pokurskaya formation studying PetrophysicsAs industry attention turns to ever more difficult and complex reservoirs to exploit the complexity of the attendant petrophysical interpretations increase. Case in point is the Pokurskaya formation of the Messoyakha field in the Yamalo-Nenets Autonomous Okrug. To date no integrated log-core data analysis has been performed on this formation due in part to poor core data/recovery and incomplete log data sets. In this paper we describe how we performed such a study accounting for complexities such as multiple clay and matrix components, sorting variations, variable fluid saturations and viscous oil. We divided out study into two phases, an elementary analysis of the mineral composition and a fluid model. The primary outputs of the elementary analysis (ELAN) is a total pore volume and a clay volume. By using geochemical log data from a neutron capture spectroscopy log (ECS*) it is possible to evaluate the mineralogical components, resolve the clay components and then refine the total porosity estimation. We note that the neutron capture spectroscopy measurements is independent of external information, a significant advantage in our case as we had no core data...

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The Use of a Wireline Formation Tester with Dual Intake Inflatable Packers to Optimize Fluid Analysis in an Eastern Siberia Heavy Oil Field

Cited by 15 publications

References 5 publications

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers

Techniques for Successful Heavy Oil Sampling with Wireline Formation Testers (Russian)

Integration of a Complex Log Data Suite for the Evaluation of Pokurskaya Formation in Western Siberia

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