New Instrumentation and Methods for Production Logging in Multiphase Horizontal Wells

Chace, David; Trcka, Darryl; Georgi, Daniel T.; Wang, Jianrong; Bousche, Olaf; Spek, Alex van der; Nasser, Hassan Al

doi:10.2118/53220-ms

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…The proposed sensor can obtain the permittivity and the conductivity of the materials in the pipes, and the experiments demonstrates that the designed sensor enlarges the measurement range compared to the single-modality sensor. There are many mature array logging instruments abroad: for example, Baker Atlas designs the multi capacitance flow meter [30], [31], [32]: Schlumberger develops the digital entry fluid imaging tool based on conductance array probe [33] and the flow scan imaging [34]; Sondex designs the multiple array production suite including the capacitance array tool, resistance array tool and spinner array tool [35], [36]. The aforementioned mature tools are mainly utilized for the full-bole non-collecting situations and only are mainly suitable for the flowing horizontal wells with high yield.…”

Section: Introductionmentioning

confidence: 99%

A Novel Combined Conductance Sensor for Water Cut Measurement of Low-Velocity Oil-Water Flow in Horizontal and Slightly Inclined Pipes

Kong

Xing

et al. 2019

IEEE Access

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This paper studied conductance-based method for water cut measurement to dynamically monitor the horizontal oil-producing wells. Existing conductance tools cannot obtain the response values corresponding to the water phase in horizontal wells due to the characteristics of the ring-shaped electrode structure and the horizontal well structure. In order to tackle this issue, this paper designed a novel Combined Conductance Sensor (CCS), which mainly consists of the Ring-Shaped Conductance Probe (RSCP) and the novel Clock-like Conductance Probe Array (CCPA). Specifically, we first established the structure model of CCS, optimized the geometry of CCPA by analyzing the uniformity of electric field distribution generated by the exciting electrodes of CCPA and then analyzed the local sensitivity field region of the optimized CCPA. Then we studied the flow pattern distribution of the horizontal oil-water two-phase flow and analyzed the response characteristics and the linear relation between RSCP and CCPA. In addition, this research developed the CCS-based tool and conducted the experiments about different inclined angles in horizontal and slightly inclined pipes. Extensive experiments demonstrated that the developed CCS can cover the three-quarter scale of water cut measurement(25%-100%) in horizontal and slightly inclined pipes, and the experimental results verified the validity of CCS for the water cut measurement. Comparing to the existing methods, the proposed CCS is more suitable for water cut measurement with the advantages of simple structure and low cost for the horizontal oil wells with the characteristics of the low production, which could be used widely in the actual logging. INDEX TERMS Combined conductance sensor, design and geometry optimization, horizontal and slightly inclined pipes, oil-water two-phase flow, water cut.

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Section: Introductionmentioning

confidence: 99%

A Novel Combined Conductance Sensor for Water Cut Measurement of Low-Velocity Oil-Water Flow in Horizontal and Slightly Inclined Pipes

Kong

Xing

et al. 2019

IEEE Access

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Acoustics-Based Flow Monitoring During Hydraulic Fracturing

Stokely

2016

Day 2 Wed, February 10, 2016

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A "semi-empirical" acoustics-based flow model is presented based on large scale flow loop testing using water, water thickened with a linear gel, and linear gel slurries containing various amounts of proppant. The flow model predicts volumetric flow rate through individual perforation clusters from calibrated high fidelity accelerometer measurements and knowledge of the fluid type and perforation cluster geometry. This model is applicable to the plug-and-perf completion often used in hydraulic fracturing of unconventional resources. The accelerometer data provides a benchmark for downhole fiber-optic distributed acoustic sensing (DAS). Custom flow loops were constructed and tested to measure acoustic signals generated by fluid turbulently flowing through simulated downhole perforations using water, water with a linear gel, and slurries containing ceramic proppant. Flow rates, perforation-hole sizes, number of clusters, number of perforations per cluster, fluid viscosity, and proppant slurry density were varied in a controlled way. These parameters were adjusted to represent a downhole stimulation treatment. The data was evaluated using symbolic regression with a 1,000-core compute cluster. Approximately three trillion analytic models were evaluated and scored for prediction accuracy and model simplicity. The data indicated that all of the fluids became significantly louder above a critical threshold. This threshold was observed to strongly depend on fluid viscosity, while no dependence was observed on the amount of proppant in the slurry. The discharge coefficient showed significant variability, even among repeated experiments when no erosion was present. Very different behaviors for the coefficient of discharge were observed between water and gelled water. The measurements and model provide a benchmark for wellbore monitoring with fiber-optic distributed acoustic measurements during stimulation. Accurate real-time flow allocation estimation allows for an immediate adjustment of treatment strategy using, for example, diverter spheres. Accurate flow allocation could possibly allow changes in stage designs to tune individual flow rates. Analytic expressions were derived relating the root-mean-square of the acoustic signal to both the perforation pressure loss and the flow speed per perforation as a function of cluster injection rate, viscosity, perforation diameter, and number of perforations. The relative importance of each of these variables was investigated and is quantitatively described. Several models for flow and accuracy were investigated and are discussed.

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Inflow Fluid Typing in Screened Horizontal Completions Using a Pulsed Neutron Holdup Imager

Maher

Trcka²

1999

All Days

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New Instrumentation and Methods for Production Logging in Multiphase Horizontal Wells

Abstract: This paper was prepared for presentation at the 1999 SPE Middle East Oil Show held in Bahrain, 20-23 February 1999.

Cited by 6 publications

References 5 publications

A Novel Combined Conductance Sensor for Water Cut Measurement of Low-Velocity Oil-Water Flow in Horizontal and Slightly Inclined Pipes

A Novel Combined Conductance Sensor for Water Cut Measurement of Low-Velocity Oil-Water Flow in Horizontal and Slightly Inclined Pipes

Acoustics-Based Flow Monitoring During Hydraulic Fracturing

Inflow Fluid Typing in Screened Horizontal Completions Using a Pulsed Neutron Holdup Imager

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