Optimization of multistage fractured horizontal well in tight oil based on embedded discrete fracture model

Xu, Shiqian; Feng, Qingsong; Wang, Sen; Javadpour, Farzam; Yuyao, Li

doi:10.1016/j.compchemeng.2018.06.015

Cited by 57 publications

(17 citation statements)

References 38 publications

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“…Grid comparison: (a) physical domain, (b) grid domain for DFM, and (c) grid domain for EDFM. The black, thick segments in panel (a) represent actual fractures and are shown in red solid lines in the grid domains (b, c)(Xu et al, 2018).…”

mentioning

confidence: 99%

Advances and challenges in shale oil development: A critical review

Feng¹,

Xu²,

Xing³

et al. 2020

Adv. Geo-Energy Res.

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154

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mentioning

confidence: 99%

Advances and challenges in shale oil development: A critical review

Feng¹,

Xu²,

Xing³

et al. 2020

Adv. Geo-Energy Res.

Self Cite

154

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“…The network structure is similar to solid state in macro and unique fluid state in micro. Nevertheless, there are still some problems in the polymer gel system, especially the time of gelation is uncontrollable, which will lead to great uncertainty in the profile control (Karaoguz et al 2007;Wu et al 2011;Xu et al 2018;Sun et al 2021). In order to avoid these problems, preformed particle gel (PPG) has been researched and developed.…”

Section: Introductionmentioning

confidence: 99%

Synergistic mechanism of well pattern adjustment and heterogeneous phase combined flooding on enhancing oil recovery in mature fault-block reservoirs

Liu

Chen³

et al. 2022

J Petrol Explor Prod Technol

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With the maturity of fault-block reservoirs, the water percolation channels are formed after long-term waterflooding, which leads to large amounts remaining oil unrecovered and low recovery efficiency. Thus, it is imperative to seek for enhancing oil recovery methods to improve the development performance of mature fault-block reservoirs. Well pattern adjustment and heterogeneous phase combined flooding are both feasible technologies for enhancing oil recovery in mature fault-block reservoirs. Nevertheless, both technologies have their limitations. Thus, a hybrid approach combining WPA and HPCF was proposed. In this study, the large-scale plate sand-pack model flooding experiments were conducted to investigate whether hybrid strategy has better EOR ability than the single WPA or HPCF. Thereafter, on the basis of incremental oil recovery and distribution of remaining oil, the mechanism of the synergistic effect of WPA and HPCF was illustrated. Finally, the influence of reservoir inclination on development performance was proposed. The results show that EOR of hybrid strategy is the highest, followed by single HPCF, and single WPA is the least. The HPCF mainly recovers remaining oil on both sides of main streamline after water flooding, and it prolongs the period of EOR validity. WPA can change the fluid flow direction and force the subsequent liquid enters the un-swept non-main streamline areas in the water flooding stage. Furthermore, by combining WPA and HPCF, the HPCF can enter the non-main streamline areas to expand sweep volume and improve oil displacement efficiency under the induction of WPA. Besides, the reservoir inclination has an obvious influence on the development performance of fault-block reservoir. With the increase of reservoir inclination, the incremental oil recovery of the single strategy or hybrid strategy decreases. Thus, these findings of this study can help for better understanding the synergetic effect of HPCF and WPA, which can provide a hybrid strategy for enhancing oil recovery in mature fault-block reservoir.

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“…Huang et al [28] introduced intelligent optimization technology into the application of horizontal well fracturing development and obtained more accurate and flexible results than orthogonal test optimization, which caused extensive research by scholars. Xu et al [29] proposed a framework of the embedding discrete fracture model (EDFM) and intelligent algorithm to optimize the parameters of fractured horizontal wells and applied it in actual reservoirs to obtain a higher net present value than local grid refinement (LGR). However, previous studies mainly focused on the optimization of fracture parameters in the fixed fracture pattern [30][31][32][33][34][35][36], which could not automatically optimize the fracture pattern distribution of fractured horizontal wells according to geological conditions.…”

Section: Introductionmentioning

confidence: 99%

A New Approach for Automatic Optimization of Complex Fracture Network in Shale Reservoirs

Wang

Zhou

2021

Lithosphere

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Shale gas reservoirs have gradually become the main source for oil and gas production. The automatic optimization technology of complex fracture network in fractured horizontal wells is the key technology to realize the efficient development of shale gas reservoirs. In this paper, based on the flow model of shale gas reservoirs, the porosity/permeability of the matrix system and natural fracture system is characterized. The fracture network morphology is finely characterized by the fracture network expansion calculation method, and the flow model was proposed and solved. On this basis, the influence of matrix permeability, matrix porosity, fracture permeability, fracture porosity, and fracture length on the production of shale gas reservoirs is studied. The optimal design of fracture length and fracture location was carried, and the automatic optimization method of complex fracture network parameters based on simultaneous perturbation stochastic approximation (SPSA) was proposed. The method was applied in a shale gas reservoir, and the results showed that the proposed automatic optimization method of the complex fracture network in shale gas reservoirs can automatically optimize the parameters such as fracture location and fracture length and obtain the optimal fracture network distribution matching with geological conditions.

show abstract

Optimization of multistage fractured horizontal well in tight oil based on embedded discrete fracture model

Cited by 57 publications

References 38 publications

Advances and challenges in shale oil development: A critical review

Advances and challenges in shale oil development: A critical review

Synergistic mechanism of well pattern adjustment and heterogeneous phase combined flooding on enhancing oil recovery in mature fault-block reservoirs

A New Approach for Automatic Optimization of Complex Fracture Network in Shale Reservoirs

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