Segmentally variable density perforation optimization model for horizontal wells in heterogeneous reservoirs

Pang, Wei Wei; Chen, Dechun; Zhang, Zhongping; Jiang, Lian; Li, Changheng; Xu, Zhao‐Dong; Wang, Bing

doi:10.1016/s1876-3804(12)60036-6

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…By accurately finding out the water production interval of horizontal wells, adopting plugging strategies or properly adjusting the bottom water inflow profile, these techniques can effectively prolong the life of production wells. And among all these techniques, perforation completion, including variable density perforation and selectively perforated completion, plays a critical role in alleviating water cresting (Pang et al 2012).…”

Section: Introductionmentioning

confidence: 99%

A new mathematical model for horizontal wells with variable density perforation completion in bottom water reservoirs

Wang

Yanwu

et al. 2017

Pet. Sci.

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Horizontal wells are commonly used in bottom water reservoirs, which can increase contact area between wellbores and reservoirs. There are many completion methods used to control cresting, among which variable density perforation is an effective one. It is difficult to evaluate well productivity and to analyze inflow profiles of horizontal wells with quantities of unevenly distributed perforations, which are characterized by different parameters. In this paper, fluid flow in each wellbore perforation, as well as the reservoir, was analyzed. A comprehensive model, coupling the fluid flow in the reservoir and the wellbore pressure drawdown, was developed based on potential functions and solved using the numerical discrete method. Then, a bottom water cresting model was established on the basis of the piston-like displacement principle. Finally, bottom water cresting parameters and factors influencing inflow profile were analyzed. A more systematic optimization method was proposed by introducing the concept of cumulative free-water production, which could maintain a balance (or then a balance is achieved) between stabilizing oil production and controlling bottom water cresting. Results show that the inflow profile is affected by the perforation distribution. Wells with denser perforation density at the toe end and thinner density at the heel end may obtain low production, but the water breakthrough time is delayed. Taking cumulative free-water production as a parameter to evaluate perforation strategies is advisable in bottom water reservoirs.

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Section: Introductionmentioning

confidence: 99%

A new mathematical model for horizontal wells with variable density perforation completion in bottom water reservoirs

Wang

Yanwu

et al. 2017

Pet. Sci.

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“…When fluid flows in perforation hole, the friction coefficient between fluid and hole wall is related to the flow law. In the laminar flow, the friction coefficient is as follows 33 : …”

Section: Mathematical Model Of Fluid Flowmentioning

confidence: 99%

Construction and application of flow pressure drop model of perforated well considering pressure loss of perforation hole

Jiang,

Wu,

Zheng

et al. 2023

Sci Rep

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Perforating well is one of the main production wells in reservoir development. Perforating effect directly affects well production, so the optimization of perforating parameters has attracted wide attention. Because pressure difference serves as the driving force for fluid flowing from formation to wellbore, it is important to understand the composition of production pressure difference in perforating well, which can guide the optimization of perforating parameters and the evaluation of perforating effect. In order to clarify the composition of production pressure difference during the production process of perforated wells, a pressure drop model pressure drop model is established based on fluid mechanics theory, which includes a pressure drop model of formation and a pressure drop model of perforation hole. The pressure drop model of formation is firstly constructed based on the Darcy's law and the equivalent resistance method, and the pressure drop model of perforation hole is built by the fluid tube-flow theory. Secondly, the numerical calculation method is adopted to realize the coupling solution of models, and the accuracy of this model is verified by comparison of the Karakas-Tariq model. Finally, the effects of formation physical properties and perforating parameters on flow pressure drop are discussed. The results show that there is a difference of more than 2 orders of magnitude between the pressure drop generated in perforation hole and flow pressure difference, and pressure drop of perforation hole can be neglected in practical applications. Comparing with medium–high permeability reservoirs, optimizing perforation parameters in low permeability reservoirs has a more significant impact on flow pressure drop. Among perforating parameters, perforation length and perforation density have great influence on flow pressure difference, while perforation diameter and phase angle have relatively little influence. These results have certain guiding significance for optimizing perforating parameters in different permeability reservoirs.

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Investigation of the radial uniform and variable inflow profiles to improve production in the perforated horizontal wellbore

Kareem,

Hasini,

Abdulwahid

2024

Heat Mass Transfer

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Segmentally variable density perforation optimization model for horizontal wells in heterogeneous reservoirs

Cited by 11 publications

References 10 publications

A new mathematical model for horizontal wells with variable density perforation completion in bottom water reservoirs

A new mathematical model for horizontal wells with variable density perforation completion in bottom water reservoirs

Construction and application of flow pressure drop model of perforated well considering pressure loss of perforation hole

Investigation of the radial uniform and variable inflow profiles to improve production in the perforated horizontal wellbore

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