New Wireline Formation Tester Development Makes Sampling and Pressure Testing Possible in Extra-Heavy Oils in Mexico

Mosqueda, Tania Flores De Dios; Aguilar, Maria Guadalupe; Herrera, Rafael; Garcia, German; Peyret, Emilie; Ramirez, Edher; Arias, Abraham; Corre, Pierre-Yves; Slapal, Miroslav; Ayán, Carlos

doi:10.2118/159868-ms

Cited by 11 publications

(4 citation statements)

References 14 publications

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“…It has been taken three formation tester samplings and pressure testing (Perez, 2012). To monitor the surface conditions of pressure and temperature were installed in real time sensors, the data can be monitored from any device with internet.…”

Section: The Field Developmentmentioning

confidence: 99%

Development Of The Mexican Field - Samaria Neogene

Mosqueda

Isidro

Arteaga-Cardona

et al. 2014

Day 2 Tue, December 09, 2014

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Due to the success and experience obtained in the Samaria Neogene field pilot test, it was decided to exploit the field by cycling steam stimulation.The development of the field has been carried out in three phases. The first phase, 48 wells were drilled with 400 meters spacing. The positive results of the first phase encouragement the development of the second and third phases, they consisted in 43 and 33 infill wells, with 200 and 150 meters spacing respectively.In the first cycles, the injection pressure was very high, even in the wells that were produced for 6 months with Sucker Rod Pump (up to 2,400 psi in the deepest wells). In the second cycles there were no high injection pressures since the well surroundings were depressurized by the first cycle. In the second cycles the injection pressure drop between 50 to 400 psi, achieving a very good steam admission by the wells in the second and third cycles.As a result of the decrease in the well spacing, the wells close to the injection wells began to show a heat increase in the produced fluids, for example, in two wells with less than 50 meters of spacing between them, during the injection of one, the other rase the temperature from 60°C to 110°C. This behavior has been very benefical for the project because reduces the viscosity not only in the injection well if not also in some of the nearby wells, resulting in an increased production in both wells. In most cases, when one of the neighboring wells is producing from the same sands, also there is steam channeling. If this channeling will be controlled, it would exist the possibility of moving to a continuous steam injection. This paper will present how the steam injection has been successful despite different conditions taken in the pilot test.

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Section: The Field Developmentmentioning

confidence: 99%

Development Of The Mexican Field - Samaria Neogene

Mosqueda

Isidro

Arteaga-Cardona

et al. 2014

Day 2 Tue, December 09, 2014

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“…With the current availability of an arsenal of probes having different shapes, focused probes of circular or elongated design, and dual packers, this planning stage has now become a more complex process. The recently introduced 3D radial probe (Al Otaibi et al 2012;Flores de Dios et al 2012) adds another choice for the engineers in planning WFT surveys.…”

Section: Introductionmentioning

confidence: 99%

Flow Modeling and Comparative Analysis for a New Generation of Wireline Formation Tester Modules

et al. 2014

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Wireline formation testing (WFT) is an integral part of reservoir evaluation strategy in both exploration and production settings worldwide. Application examples include fluid gradient determination, downhole sampling, fluid scanning in transition zones, as well as interval pressure transient tests (IPTTs). Until recently, however, formation testing was still challenging and prone to failure when testing in low-mobility, unconsolidated, or heavy-oil-bearing formations, especially with single-probe type tools. A new-generation WFT module with a 3D radial probe expands the operating envelope. By using multiple fluid drains spaced circumferentially around the tool, the new module can sample in tighter formations and sustain higher pressure differentials while providing mechanical support to the borehole wall.We performed a detailed flow modeling-based analysis of the contamination cleanup behavior during fluid sampling with the new module. Using both miscible (sampling oil in oil-based mud) and immiscible (sampling oil in water-based mud) contamination models we studied the cleanup behavior over a wide range of formation properties and operating conditions. Comparison of the cleanup performance of the new module with the performance of conventional single-probe tools demonstrates that the new module is 10 to 20 times faster than the single-probe tools when sampling in tight formations. Finally, we also compared the new module against the sampling performance of dual packers and a focused probe.This work is directly relevant to the planning and fundamental understanding of wireline fluid sampling. The key contributions are miscible and immiscible contamination cleanup models that include the effect of tool storage, a comprehensive analysis of contamination cleanup behavior for the new-generation WFT module with comparisons against conventional single-probe, focused probe, and dual-packer tools, and a characterization of fluid sampling conditions versus the preferred type of sampling tool.

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“…Recently Al-Otaibi et al (2012) and Flores de Dios et al (2012) presented two papers on the applications of the slotted-packer module. The first paper dealt with downhole fluid sampling and transient tests in low mobility carbonate formations.…”

Section: Introductionmentioning

confidence: 99%

“…Of course, this solution does not accurately model the early time behavior of the slotted-packer module. The Flores de Dios et al (2012) paper mainly dealt with taking downhole fluid samples using the slotted packer module in a heavy-oil unconsolidated-sandstone reservoir (≈ 8 • API).…”

Section: Introductionmentioning

confidence: 99%

Pressure Transient Solutions for Vertically Slotted-Partially Penetrated Vertical Wells in Porous Media

Biryukov

Kuchuk

2014

Transp Porous Med

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In this paper, we present semi-analytical pressure transient solutions for vertically slotted-limited entry or partially penetrated vertical wells. These solutions are needed for interpretation of the pressure transient tests conducted with the Wireline Formation Testing vertically slotted-packer configuration, and in wells with vertically slotted-liner completions. These slots have limited size openings and are vertically placed on a non-permeable cylindrical wellbore in a porous medium. The fluid from the formation is produced through these slots into the wellbore. Pressure transient solutions are not readily available for the uniform pressure boundary condition on the surface of the slots because such a condition creates a mixed boundary value problem, which is difficult to solve. Here we present exact pressure transient solutions obtained under the assumption that the pressure on the slot surface is uniform but a priori unknown, and the rest of the wellbore surface is non-permeable (no-flow condition). Furthermore, we generalize our solution for the case of multiple slots (open sections) on the wellbore for both well testing and Wireline formation tester packer modules. Our solutions are compared with the existing solutions. A new formula for obtaining the drawdown horizontal mobility is presented for anisotropic media.

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New Wireline Formation Tester Development Makes Sampling and Pressure Testing Possible in Extra-Heavy Oils in Mexico

Abstract: Accurate fluid variations in vi completion stra he efficiency o mobility section with viscosity v

Cited by 11 publications

References 14 publications

Development Of The Mexican Field - Samaria Neogene

Development Of The Mexican Field - Samaria Neogene

Flow Modeling and Comparative Analysis for a New Generation of Wireline Formation Tester Modules

Pressure Transient Solutions for Vertically Slotted-Partially Penetrated Vertical Wells in Porous Media

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