Advances in improved/enhanced oil recovery technologies for tight and shale reservoirs

Wang, Lei; Tian, Yan; Yu, Xiangyu; Wang, Cong; Yao, Bowen; Wang, Shihao; Winterfeld, Philip H.; Xu, Wei; Yang, Zhenzhou; Wang, Yonghong; Cui, Jingyuan; Wu, Yu‐Shu

doi:10.1016/j.fuel.2017.08.095

Cited by 261 publications

(88 citation statements)

References 155 publications

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“…The recovery factor for huff-n-puff case was 11.46%, which was 1.48 times the 7.74% RF of depletion. The improvement factor of 1.48 matched the field observations in the literature (Wang et al 2017;Hoffman 2018). Table 4.3 shows the component RF of C3.…”

Section: Huff-n-puff Vs Depletionsupporting

confidence: 77%

“…In addition, a reduced IFT in miscible injection often means more mobilized oil (Yang et al 2019). Lastly, gas injection with hydrocarbon gas or CO2 could reduce the environmental impact from gas flaring or greenhouse gas emissions (Wang et al 2017). Gas huff-n-puff is often favored compared with flooding when reservoir permeability is lower than 1 md, because of shorter response time and the ease of single-well operation (Sheng 2015).…”

Section: List Of Tablesmentioning

confidence: 99%

“…Gas huff-n-puff is often favored compared with flooding when reservoir permeability is lower than 1 md, because of shorter response time and the ease of single-well operation (Sheng 2015). Among all of the gas sources, CO2 is an ideal solvent owing to its capability of extracting intermediate hydrocarbon components (Wang et al 2017).…”

Section: List Of Tablesmentioning

confidence: 99%

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Simulation of High Water-Cut in Tight Oil Reservoirs during Cyclic Gas Injection

Zhang

Tian

Shen

et al. 2019

Day 2 Fri, November 08, 2019

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Section: Huff-n-puff Vs Depletionsupporting

confidence: 77%

Section: List Of Tablesmentioning

confidence: 99%

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Simulation of High Water-Cut in Tight Oil Reservoirs during Cyclic Gas Injection

Zhang

Tian

Shen

et al. 2019

Day 2 Fri, November 08, 2019

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“…In the face of the continuous growth of world oil and gas demand and the decline of conventional resources production, tight oil resources with great potential have gradually become burning issues in global petroleum exploration and development [1][2][3][4]. China has abundant and plentiful tight oil resources [5], most of which are continental deposits, unlike the United States, where they are marine deposits [6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Displacement Effects of Different Injection Media in Tight Oil Sandstone by Online Nuclear Magnetic Resonance

et al. 2018

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In order to evaluate the displacement effect of four kinds of injection media in tight oil sandstone, water, active water, CO2, N2 flooding experiments were carried out in laboratory. Online Nuclear Magnetic Resonance (NMR) spectrometers combine the advantages of NMR technology and core displacement experiments. In the displacement experiment, NMR data of different injection volumes were obtained and magnetic resonance imaging (MRI) was carried out. The results showed that micro and sub-micropores provided 62–97% of the produced crude oil. The enhanced oil recovery ratio of active water flooding was higher than that of conventional water flooding up to 10%. The recovery ratio of gas flooding in micro and sub-micropores was 60–70% higher than that of water flooding. The recovery ratio of CO2 flooding was 10% higher than that of N2 flooding. The remaining oil was mainly distributed in pores larger than 0.1 μm. Under the same permeability level, the remaining oil saturation of cores after gas flooding was 10–25% lower than water flooding. From MRI images, the displacement effects from good to bad were as follows: CO2 flooding, N2 flooding, active water flooding, and conventional water flooding.

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“…capillary pressure curves, are used as inputs to reservoir simulation software (Rezaee 2015) and provide valuable information for management and decision making. Also, several methods used in enhanced oil recovery (EOR) are based on flooding with chemicals such as polymer solutions, foams or emulsions with the purpose of reducing the mobility ratio of displacing fluid to the displaced fluid (Wang et al 2017). This results in reduction of viscous fingering and therefore in improved sweep efficiency in the reservoir (Sheng 2011).…”

Section: Introductionmentioning

confidence: 99%

Using Xanthan Gum Solutions to Characterize Porous Media with the Yield Stress Fluid Porosimetry Method: Robustness of the Method and Effects of Polymer Concentration

2018

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The yield stress fluids porosimetry method (YSM) was recently presented as a simple and non-toxic potential alternative to the extensively used mercury intrusion porosimetry (MIP). The success of YSM heavily relies on the choice of an appropriate yield stress fluid to be injected through the investigated porous medium. In previous works, xanthan gum aqueous solutions were used due to their ability to exhibit a pseudo-yield stress without substantial levels of unwanted thixotropy or viscoelasticity. Given that YSM is based on the existence of a yield stress, the accuracy of the obtained pore size distribution (PSD) crucially depends on the capacity of the injected fluid to emulate the shear rheology of a yield stress fluid. However, this capacity has still not been fully assessed in the case of xanthan gum solutions. Neither has the robustness of YSM with regard to errors in the determination of the shear-rheology parameters of the injected fluid been analysed. The shear viscosity of polymer solutions is known to be deeply influenced by polymer concentration. For these reasons, a first objective of this work is to evaluate the effect of polymer concentration on the accuracy of PSDs obtained by YSM when using xanthan gum solutions as injected fluids in laboratory experiments. To do so, xanthan gum solutions with different polymer concentrations were injected through analogous samples of a sintered silicate and the obtained PSDs were compared to the results of standard MIP. Moreover, the sensitivity of YSM to errors in the experimental determination of the shear-rheology parameters was also investigated through numerical experiments. The results of the present work permitted to gain further insight into the viability of YSM as an efficient alternative to MIP.

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Advances in improved/enhanced oil recovery technologies for tight and shale reservoirs

Cited by 261 publications

References 155 publications

Simulation of High Water-Cut in Tight Oil Reservoirs during Cyclic Gas Injection

Simulation of High Water-Cut in Tight Oil Reservoirs during Cyclic Gas Injection

Evaluation of Displacement Effects of Different Injection Media in Tight Oil Sandstone by Online Nuclear Magnetic Resonance

Using Xanthan Gum Solutions to Characterize Porous Media with the Yield Stress Fluid Porosimetry Method: Robustness of the Method and Effects of Polymer Concentration

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