Comparative evaluation of pressure distribution between horizontal and vertical wells in a reservoir (edge water drive)

Eiroboyi, I.; Wilkie, S. I.

doi:10.4314/njt.v36i2.19

Cited by 6 publications

(1 citation statement)

References 4 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simple excel software was used to enhance computation. Determination of transient pressure behavior for horizontal wells using dimensionless approach has fully overcome the challenges faced in conventional methods and has brought about major success in pressure analysis for both conventional and horizontal wells [2]. With clear delineation of characteristic shapes from diagnostic plots, flow periods are more distinctively separated, and because most often horizontal wells are applied to reservoir to prolong infinite activities as possible dimensionless analytical approach has played a major part by simplifying and magnifying plots.…”

Section: Introductionmentioning

confidence: 99%

Pressure distribution of a horizontal well in a bounded reservoir with constant pressure top and bottom

Orene¹,

Adewole²

2020

Nig. J. Tech.

View full text Add to dashboard Cite

The purpose of this study is to develop a mathematical model using Source and Green’s functions for a Horizontal Wells in a Bounded Reservoir with Constant Pressure at the Top and Bottom for the interpretation of pressure responses in the reservoir based on dimensionless pressure and pressure derivative. Reservoir and well parameters investigated revealed what sets of reservoir/ well parameters combination that will prolong infinite activity of the reservoir before steady state sets in. Results show that dimensionless lateral extent does not directly affect the dimensionless pressure and dimensionless pressure derivative for very short well lengths as used in this paper. Dimensionless pressure increases with reservoir pay thickness and delay the time for steady state conditions. In fact external fluid invasion is strongly affected by the size of the pay thickness, thus the minimum time for steady state period to set in is according to the relation TD ≥ LD/5. Keywords: Bounded, reservoir, steady-state conditions, horizontal well, constant pressure.

show abstract

Section: Introductionmentioning

confidence: 99%

Pressure distribution of a horizontal well in a bounded reservoir with constant pressure top and bottom

Orene¹,

Adewole²

2020

Nig. J. Tech.

View full text Add to dashboard Cite

show abstract

Performance of a horizontal well in a bounded anisotropic reservoir: Part I: Mathematical analysis

et al. 2022

View full text Add to dashboard Cite

To enhance the productivity of horizontal wells, it is of necessity to ensure that they perform optimally. This requires an understanding of how the reservoir’s geometry, anisotropy and well design affect the pressure response. Mathematical formulations can be used to simulate pressure response in the wellbore and the data obtained can be analysed to obtain well and reservoir parameters that can aid performance and evaluation. In this study, a mathematical model that can be used to approximate pressure response in a horizontal well is formulated, and a detailed mathematical analysis that can be used to obtain well and reservoir parameters are provided. A horizontal well inside a rectangular drainage volume with sealed boundaries is considered and the effect of each boundary on pressure throughout its productive life is studied. In the analysis, investigations on how the reservoir parameters can be approximated over a given period of production are conducted. This is achieved by identification of the appropriate source and Green’s functions. These source functions allow us to formulate a mathematical model for dimensionless pressure. Considering the diagnostic plots for both dimensionless pressure and dimensionless pressure derivative, mathematical analysis studies the possible behaviour of the plots. Analysis indicates that the reservoir anisotropy can be approximated during the infinite-acting flow at early times when other parameters are known. Further, when the first boundary is felt, in this case the vertical boundary, the horizontal permeability can be approximated during the transition flow periods at middle times. Finally, at late times when all the boundaries have been felt and a pseudosteady state flow is evident, reservoir dimensions can be approximated. These results can significantly improve well test analysis and enhance the performance evaluation of a horizontal well.

show abstract

Performance of a horizontal well in a bounded anisotropic reservoir: Part II: Performance analysis of well length and reservoir geometry

et al. 2023

View full text Add to dashboard Cite

Evaluation of the performance of horizontal wells is an important aspect in the enhancement of their productivity. This study provides mathematical computations, and analysis for theoretical well and reservoir considerations. The study investigates how well design and reservoirs geometry affect the overall performance of a horizontal well in a completely bounded reservoir throughout its productive life. A horizontal well in a rectangular reservoir with completely sealed boundaries is considered and the effect of dimensionless well length L D \hspace{.25em}{L}_{\text{D}} , dimensionless reservoir length x eD \hspace{.25em}{x}_{\text{eD}} , and dimensionless reservoir width y eD {y}_{\text{eD}} on the pressure response over a given period of production using dimensionless time t D {t}_{\text{D}} is studied. The mathematical model used was derived using source and Green’s functions presented in part I of this study. Appropriate well and reservoir parameters are considered and the respective dimensionless parameters are computed which are then used in computing dimensionless pressure P D {P}_{\text{D}} and its dimensionless pressure derivative P D ′ \hspace{.25em}{P}_{\text{D}}^{^{\prime} } . From the computations, the results obtained are analysed in diagnostic log–log plots with a discussion of the flow periods. The results obtained indicate that an increase in dimensionless well length decreases pressure response during the infinite-acting flow at early times and during transition flows at middle time but increases the pressure response during the pseudosteady state flow at late times. The dimensionless reservoir width and length are observed not to influence dimensionless pressure response during the infinite-acting flow at early times and during the transition flows at middle time, only affecting the prevalence time of the flow periods. However it is observed that during the pseudosteady state flow at late times, dimensionless pressure response reduces with increased dimensionless reservoir length and width.

show abstract

Comparative evaluation of pressure distribution between horizontal and vertical wells in a reservoir (edge water drive)

Cited by 6 publications

References 4 publications

Pressure distribution of a horizontal well in a bounded reservoir with constant pressure top and bottom

Pressure distribution of a horizontal well in a bounded reservoir with constant pressure top and bottom

Performance of a horizontal well in a bounded anisotropic reservoir: Part I: Mathematical analysis

Performance of a horizontal well in a bounded anisotropic reservoir: Part II: Performance analysis of well length and reservoir geometry

Contact Info

Product

Resources

About