Recent techniques on analyses and characterizations of shale gas and oil reservoir

Wang, Yamin; Wang, Zhenlin; Zhang, Zhengchen; Yao, Shanshan; Zhang, Hong; Zheng, Guoqing; Luo, Feifei; Feng, Lele; Liu, Kouqi; Jiang, Liangliang

doi:10.1016/j.enrev.2023.100067

Cited by 3 publications

(3 citation statements)

References 95 publications

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“…Different types of porosity systems exist within organic-rich shales (e.g., kerogen pores, interparticle, intraparticle, and fracture-type pores). Permeability provides a direct estimate of shale gas potential and can be used to determine the productivity of shale gas reservoirs. − …”

Section: Introductionmentioning

confidence: 99%

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Unconventional Reservoir Characterization of Patala Formation, Upper Indus Basin, Pakistan

Ehsan,

Chen,

Latif

et al. 2024

ACS Omega

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Unconventional hydrocarbon exploration is needed in the current oil and gas crisis scenario. Therefore, the development of conditions for unconventional hydrocarbon exploration is needed. In the Upper Indus Basin (UIB), Pakistan, the Patala Formation is one of the potential candidates for this unconventional exploration. It is a proven source rock at the regional level in the Kohat-Potwar sub-basin of UIB. This study aims to evaluate the shale gas potential of the rock in the Minwal-Joyamair area of the sub-basin. Developing a shale rock physics model is important for exploring and developing shale reservoirs due to the difference between unconventional shale and conventional sand reservoirs. These differences include mineral types, mineral characteristics, matrix pores, and fluid properties. To achieve the study's objectives, an integrated strategy provides for evaluating rock physics parameters, petrophysics, and geochemical analyses. This integrated approach indicates that the Patala Formation is a good potential reservoir for shale gas exploration. The Formation has a significant thickness (around 40−50 m), higher total organic carbon content (02−10%), higher brittleness index (0.44−0.56), and relatively shallow depth (2136−3223 m). These research findings suggested that the presence of organic and quartz-rich lithofacies can be considered as highly favorable "sweet spots" for shale-gas exploration in the UIB, Pakistan. Through proper understanding of the spatial and temporal distribution of these "sweet spots", shale-gas exploration can be developed as an effective strategy to exploit shale gas.

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Section: Introductionmentioning

confidence: 99%

“…Permeability provides a direct estimate of shale gas potential and can be used to determine the productivity of shale gas reservoirs. 21 − 23 …”

Section: Introductionmentioning

confidence: 99%

Unconventional Reservoir Characterization of Patala Formation, Upper Indus Basin, Pakistan

Ehsan,

Chen,

Latif

et al. 2024

ACS Omega

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“…Strategies such as CO 2 geological sequestration and enhanced oil recovery have garnered significant attention for their potential to both store CO 2 underground and enhance oil extraction efficiency [4]. Shale oil, distinguished from conventional oil by its presence in free and adsorbed states within the microscopic pores of organic-rich rock formations, presents unique technical challenges [5,6]. These challenges arise from the need for advanced technologies to effectively extract and process oil from such tight formations, differentiating it from conventional oil found in larger pores and fractures.…”

Section: Introductionmentioning

confidence: 99%

Optimization of CO2 Injection Huff and Puff Process in Shale Reservoirs Based on NMR Technology

Gao,

Liu,

et al. 2024

Applied Sciences

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The pore mobilization characteristics of CO2 when in shale reservoirs is an important indicator for evaluating the effectiveness of its application for enhanced recovery in shale reservoirs, and it is important to develop a comprehensive set of physical simulation methods that are consistent with actual field operations. This has underscored the need for efficient development techniques in the energy industry. The huff-n-puff seepage oil recovery method is crucial for developing tight oil reservoirs, including shale oil. However, the small pore size and low permeability of shale render conventional indoor experiments unsuitable for shale oil cores. Consequently, there is a need to establish a fully enclosed experimental method with a high detection accuracy to optimize the huff and puff process parameters. The NMR technique identifies oil and gas transport features in nanogaps, and in this study, we use low-field nuclear magnetic resonance (NMR) online displacement technology to conduct CO2 huff and puff experiments on shale oil, covering the gas injection, well stewing, and production stages. After conducting four rounds of huff-n-puff experiments, key process parameters were optimized, including the simmering time, huff-n-puff timing, number of huff-n-puff rounds, and the amount of percolant injected. The findings reveal that as the number of huff-n-puff rounds increases, the time required for well stabilization decreases correspondingly. However, the enhancement in recovery from additional huff-n-puff rounds becomes negligible after three rounds, showing only a 1.16% improvement. CO2 re-injection is required when the pressure falls to 70% of the initiaformation pressure to ensure efficient shale oil well development. This study also indicates that the most economically beneficial results are achieved when the injection volume of the huff-n-puff process is 0.44 pore volumes (PVs).

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Improving Stem Literacy Through Project-Based Geoscience Learning (Pjbgl) Model

Nastiti,

Sunarno,

Sukarmin

et al. 2024

JBSE

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The intricacy of real-world challenges in project-based geoscience learning is complex to assess with a STEM approach; hence, research into an effective model is necessary to address current issues in education. Understanding the role of STEM in resolving challenging real-world issues requires integrating STEM literacy that is appropriate for geoscience education. This study examines the effectiveness of the Project-Based Geoscience Learning (PJBGL) model in enhancing STEM literacy. By integrating project-based learning with geoscience, the aim is to create an interactive and immersive learning environment. The study seeks to contribute to knowledge about the effectiveness of this model compared to the conventional model. The aim was to evaluate the PJBGL model's impact on students' literacy, particularly in the geosciences. The study utilized a pretest-posttest control group design with 33 students, 19 in the experimental group and 14 in the control group, collecting STEM literacy data using a test instrument and analyzing the data with the Mann-Whitney test. Effect Size calculation using Cohen's d and increased STEM literacy was tested with the N-Gain formula. The research results show that the PJBGL model is more effective in increasing STEM literacy in geoscience learning than the conventional learning model. This finding holds implications for educators and curriculum developers seeking innovative strategies to cultivate students' STEM literacy. Keywords: geoscience learning, project-based learning, STEM literacy, quasi-experimental design

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Recent techniques on analyses and characterizations of shale gas and oil reservoir

Cited by 3 publications

References 95 publications

Unconventional Reservoir Characterization of Patala Formation, Upper Indus Basin, Pakistan

Unconventional Reservoir Characterization of Patala Formation, Upper Indus Basin, Pakistan

Optimization of CO2 Injection Huff and Puff Process in Shale Reservoirs Based on NMR Technology

Improving Stem Literacy Through Project-Based Geoscience Learning (Pjbgl) Model

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