Interpretation models and charts of production profiles in horizontal wells

Guo, Hongjian; Liu, Junfeng; Dai, Junhu; Wang, Kai; Hong-wei, Song

doi:10.1007/s11430-009-5005-9

Cited by 10 publications

(4 citation statements)

References 3 publications

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“…Taking into account the computational speed of FEM in the 3D electric field, an oil droplet 2 mm in diameter was used in the simulation experiments. The spatial sensitivity distribution of SGLCP in a specific structure can be obtained by changing the position of the oil droplet in the sensitive area and solving the finite element model with formula (1).…”

Section: Spatial Sensitivity Definitionmentioning

confidence: 99%

“…With the rapid development of horizontal well technology, horizontal production profile logging data interpretation is becoming an important research hotspot in related research fields [1]. In particular, water volume fraction, as an important and representative parameter in two-phase flow measurement, needs to be acquired as accurately as possible in the development of the horizontal oil field and the optimization of the oil production process [2,3].…”

Section: Introductionmentioning

confidence: 99%

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The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

Kong

et al. 2017

Meas. Sci. Technol.

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Water volume fraction is an important parameter of two-phase flow measurement, and it is an urgent task for accurate measurement in horizontal oil field development and optimization of oil production. The previous ring-shaped conductance water-cut meter cannot obtain the response values corresponding to the oil field water conductivity for oil–water two-phase flow in horizontal oil-producing wells characterized by low yield liquid, low velocity and high water cut. Hence, an inserted axisymmetric array structure sensor, i.e. a six-group local-conductance probe (SGLCP), is proposed in this paper. Firstly, the electric field distributions generated by the exciting electrodes of SGLCP are investigated by the finite element method (FEM), and the spatial sensitivity distributions of SGLCP are analyzed from the aspect of different separations between two electrodes and different axial rotation angles respectively. Secondly, the numerical simulation responses of SGLCP in horizontal segregated flow are calculated from the aspect of different water cut and heights of the water layer, respectively. Lastly, an SGLCP-based well logging instrument was developed, and experiments were carried out in a horizontal pipe with an inner diameter of 125 mm on the industrial-scale experimental multiphase flow setup in the Daqing Oilfield, China. In the experiments, the different oil–water two-phase flow, mineralization degree, temperature and pressure were tested. The results obtained from the simulation experiments and simulation well experiments demonstrate that the designed and developed SGLCP-based instrument still has a good response characteristic for measuring water conductivity under the different conditions mentioned above. The validity and reliability of obtaining the response values corresponding to the water conductivity through the designed and developed SGLCP-based instrument are verified by the experimental results. The significance of this work can provide an effective technology for measuring the water volume fraction of oil–water two-phase flow in horizontal oil-producing wells.

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Section: Spatial Sensitivity Definitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

Kong

et al. 2017

Meas. Sci. Technol.

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“…From the above analysis, we can conclude that there is a difference for oil-water or gas-water two-phase in highly deviated and horizontal well, that means, there is a slip velocity. So we revise the well deviation influence to calculated slip velocity based on the definition formula, establish the well deviation correction model of slip velocity, calculate each phase apparent velocity, obtain the phase flow rate, and finally realize the data interpretation of production logging in highly deviated and horizontal well [9] .…”

Section: Well Deviation Correction Modelmentioning

confidence: 99%

Experimental Study of Well Deviation Correction Model in Deviated and Horizontal Wells Production Profile

Liu

Guo

2012

AMR

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There are big difference of fluid flow patterns between horizontal wells and vertical wells, so the current interpretation models of production logging multiphase flow in vertical wells are not suitable for data interpretation in highly deviated and horizontal wells. In this paper, firstly, the two-phase flow (oil-water and gas-water) simulation experiments have been carried out in large-diameter (0.124 meter internal diameter) uphill, horizontal and downhill Plexiglas pipe with practical production logging tools. Secondly, based on the conclusions of fluid flow mechanism from experimental data analysis, and considering the affecting factors (i.e. Logging tool and well deviation ), we have obtained slip velocity model after well deviation correction in highly deviated and horizontal wells, which have been corrected by the mature interpretation models. Finally, this proposed method has been proved correct and feasible through the experimental data validation.

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“…In the investigations on the flow patterns of horizontal oil-water two-phase flow patterns, experimental and theoretical study in a horizontal pipe with the inner diameter of 50.1 mm was comprehensively performed by Trallero et al (1996), and then the flow patterns are classified into segregated flow and dispersed flow; an experiment on the flow patterns under oil-water two-phase conditions in a large inner diameter horizontal pipe was conducted by Yang et al (2008), and the same result of flow patterns classification is obtained. Hence, in the actual horizontal oil wells with long distance undulating, a mixed flow pattern, which is mainly horizontal segregated flow, whose phenomenon that the underlayer shows a water flow and the upperlayer shows an oil flow or a dispersion of oil in water, exists in the horizontal oil-water two-phase flow with low velocity and high water cut, compared to vertical wells, and flow pattern and velocity are greatly influenced by the inclination of horizontal oil-producing wells (Trallero et al 1996;Lum et al 2006); so the most previous profile parameters measurement instruments for the production of vertical wells cannot be directly used for horizontal oil-producing wells (Guo et al 2009). And it can be deduced that the various complicated flow structures in horizontal oil-water two-phase flows raise many challenges in the profile parameter measuring sensor design.…”

Section: Introductionmentioning

confidence: 99%

Response characteristics of conductance sensor and optimization of control-drive circuit in horizontal pipes

Cui

et al. 2019

J Petrol Explor Prod Technol

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Oil-water two-phase flow in horizontal oil-producing wells with low velocity and high water cut generally presents the phenomenon that the underlayer shows water flow and the upperlayer presents oil flow or a dispersion of oil in water flow. And existing ring-shaped conductance water cut meter cannot obtain the online and real-time response values corresponding to oil field water conductivity in the calculating water holdup procedure. To tackle this issue, this paper designs a mini-conductance probe array (MCPA). In order to further investigate the ability of the total flow rate of the allowable measurement fluid and the parameters valuing of the water cut in horizontal segregated flow, this paper also analyzes the performance of MCPA with different structure parameters in terms of the spatial sensitivity distribution characteristics. Firstly, the geometry model and mathematical model of MCPA are designed, and the MCPA simulation model is analyzed by using the finite element method. Then, the optimum structure parameter results of the sensors are obtained through analyzing the spatial sensitivity distribution characteristics of MCPA in consideration of different distance between the two electrodes and different inner diameters. Lastly, the MCPA different parameters are developed, and experiments are carried out in horizontal multiphase flow experiment facility to analyze spatial sensitivity distribution characteristics of MCPA with different inner diameters on the basis of optimum parameters. Experimental results demonstrated that MCPA with a larger inner diameter would have high measurement accuracy in variation range of water cut, and has a high adaptability in horizontal oil-producing wells with relatively high flow rate and different flow conditions.

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Interpretation models and charts of production profiles in horizontal wells

Cited by 10 publications

References 3 publications

The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

The influence on response of axial rotation of a six-group local-conductance probe in horizontal oil–water two-phase flow

Experimental Study of Well Deviation Correction Model in Deviated and Horizontal Wells Production Profile

Response characteristics of conductance sensor and optimization of control-drive circuit in horizontal pipes

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