Data-driven approach for evaluation of formation damage during the injection process

Shabani, Ali; Jahangiri, Hamid Reza; Shahrabadi, Abbas

doi:10.1007/s13202-019-00764-9

Cited by 6 publications

(2 citation statements)

References 54 publications

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“…11,12 Recently, a CRM was introduced in waterflooding studies to estimate the connections between wells in a field. [13][14][15][16][17][18][19] The CRM is an intuitive and fast technique which uses only the well production and injection rates and pressure data. It exhibits the strengths of injector-producer connections and is able to estimate the production rate of each producer.…”

Section: Introductionmentioning

confidence: 99%

Data-driven technique for analyzing the injector efficiency in a waterflooding operation

Shabani¹,

Moosavi

Zivar

et al. 2020

SIMULATION

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Waterflooding is considered as one of the most common methods for improving the ultimate recovery of oil reservoirs. The efficiency of a waterflooding operation strongly depends on the determination and quantification of the relative connections between the injection and production wells. Injection and production rates are the most accessible data and they can provide useful information about the interwell connections. Recently, several data-driven approaches, such as the capacitance resistance model (CRM), have been presented based on available reservoir data. The CRM is a valuable analytical model for estimating the production rates and interwell connections through optimization of the production data. In this study, a CRM is used in order to estimate the production rate and evaluate the underground flow paths for both synthetic and real cases. A new concept called Value of Injection (VoI) is developed for the injectors to analyze their performance in the early time of the waterflooding prior to the significant water breakthrough. The calculated VoI is directly used for economical evaluation of the injectors. The results of this study show that a strong underground connection between an injector–producer pair does not always result in higher efficiency of the injector.

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Section: Introductionmentioning

confidence: 99%

Data-driven technique for analyzing the injector efficiency in a waterflooding operation

Shabani¹,

Moosavi

Zivar

et al. 2020

SIMULATION

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“…The CRM was first used by Yousef et al [16] to determine the connectivity between wells in 2005. Following that, the model was used in waterflooding reservoirs [17], large-scale reservoirs [18], and analysis of the formation damage from injected water [19]. Zhao et al [20] proposed the INSIM in 2015.…”

Section: Introductionmentioning

confidence: 99%

A New Methodology for the Multilayer Tight Oil Reservoir Water Injection Efficiency Evaluation and Real-Time Optimization

Cao

Xiu

Cheng³

et al. 2020

Geofluids

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It is important to determine the reasonable injection and production rates in the development of multilayer tight oil reservoir with water flooding treatment. Based on the INSIM (interconnection-based numeric simulation model), a connected network model, a new method is designed to evaluate the water injection efficiency of different layers in water flooding reservoirs and to optimize the injection-production system to produce more oil. Based on the types of sedimentary facies and corresponding injection-production data, the interwell connections are divided into four major categories (middle channel, channel edge, middle channel bar, and channel bar edge) and twelve subclasses. This classification standard of interwell connections could help to significantly improve the accuracy of judging the dominant flow path without constructing a complicated geological model. The interaction of interwells such as injection-production correlation and water injection efficiency could be revealed by simulating the production performance and computing the layer dividing coefficient and well dividing coefficient. A numerical example is used to validate this method by comparing results from FrontSim and this method, and the computational efficiency of this method is several dozen times faster than that of the traditional numerical simulation. This method is applied to quickly optimize the production schedule of a tight oil reservoir with the water flooding treatment, that is, the water injection rate of multilayer reservoirs could be optimized subtly by the injection efficiency of different layers, and the target of producing more oil with lower water cut could be achieved.

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Numerical simulation of formation damage by drilling fluid in low permeability sandstone reservoirs

Liu

2021

J Petrol Explor Prod Technol

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Understanding the formation damage surrounding the well during the drilling operation is the key to predict damage degree and protect the formation in oil/gas reserviors. Based on the core drainage results, we obtained an empirical relationship between the invasion volume of drilling fluid and permeability reduction of formation. Furthermore, the equation is incorporated into a commercial reservior numerical simulation simulator to characterize the behaviors of drilling fluid invasion process. The results show that, although the invasion depth in low permeability reservoirs is short with the range of 1.7–2.5 m, the effect on recovery factor is significant due to the narrow seepage area in the near fracture region. When considering the formation damage, the pressure in the near-fracture damage region drops sharply, leading to a three-stage shape in pressure distribution curve. In addition, we found that high viscosity and low density oil-based slurry and shorter soaking period are conducive to decrease the formation damage during drilling operation. This work reveals the fundamental mechanisms of formation damage in low permeability reservoirs, which is a theoretical basis in formulation drilling fluids and optimization operation parameters.

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Data-driven approach for evaluation of formation damage during the injection process

Cited by 6 publications

References 54 publications

Data-driven technique for analyzing the injector efficiency in a waterflooding operation

Data-driven technique for analyzing the injector efficiency in a waterflooding operation

A New Methodology for the Multilayer Tight Oil Reservoir Water Injection Efficiency Evaluation and Real-Time Optimization

Numerical simulation of formation damage by drilling fluid in low permeability sandstone reservoirs

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