Theory, Technology and Practice of Unconventional Petroleum Geology

Journal of Earth Science, Journal Year: 2023, Volume and Issue: 34(4), P. 951 - 965

Published: Aug. 1, 2023

Language: Английский

---

Estimating total organic carbon of potential source rocks in the Espírito Santo Basin, SE Brazil, using XGBoost

Marine and Petroleum Geology, Journal Year: 2024, Volume and Issue: 162, P. 106765 - 106765

Published: Feb. 19, 2024

Language: Английский

---

Characteristics of Organic Matter Types and Organic Matter Pore Development in Marine–Continental Transitional Shale

Geological Journal, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

ABSTRACT The types of organic matter (OM) significantly impact the hydrocarbon generation potential, reservoir capacity and mechanical properties shale. Unlike relatively homogeneous OM in high‐maturity marine shale (predominantly solid bitumen), marine–continental transitional exhibits a more complex assemblage, comprising mixture terrestrial kerogen (vitrinite, inertinite liptinite) bitumen. Accurate differentiation quantification their associated pores are critical for evaluating formations. This study investigates Upper Carboniferous Taiyuan Formation Ningwu Basin, representative system. A correlative microscopy approach integrating scanning electron (SEM) optical was employed to classify types, which further augmented by image segmentation processing techniques elucidate pore development characteristics. It reveals disparities with different proposes an SEM–based identification method distinguishing them. Results indicated that vitrinite has thick cell walls vertical fractures, low grayscale value carbon content ranging from 80% 95%; thinner distinct protrusions, slightly higher than between 75% 90%; liptinite often retains morphology residual vegetation, such as serrated cutinite, flat ring‐like sporinite lens‐like structured alginite. Solid bitumen highest is amorphous shape. related type, most developed found bitumen, secondary origin. followed inertinite, both primary present. also degree thermal evolution surrounding minerals contact relationships. Basin wide range total (TOC) contents, average 2.14%. Its microscopic components primarily (over 50%), maturity (average 1.17%) rigid 42.3%), resulting poorly intergranular storage spaces. However, high strong adsorption still endow ability enrich gas. possesses unique geological features, including interspersed thin coal seams sandstone layers. generates hydrocarbons supplies gas conjunction shale, whereas sand layers enhance harbouring potential large‐scale reserves. Thus, integrated exploration exploitation model involving coal, tight recommended maximise resource

Language: Английский

---

Enhanced Data-Driven Machine Learning Models for Predicting Total Organic Carbon in Marine–Continental Transitional Shale Reservoirs

Sustainability, Journal Year: 2025, Volume and Issue: 17(5), P. 2048 - 2048

Published: Feb. 27, 2025

Natural gas, as a sustainable and cleaner energy source, still holds crucial position in the transition stage. In shale gas exploration, total organic carbon (TOC) content plays role, with log data proving beneficial predicting reservoirs. However, complex coal-bearing layers like marine–continental transitional Shanxi Formation, traditional prediction methods exhibit significant errors. Therefore, this study proposes an advanced, cost- time-saving deep learning approach to predict TOC shale. Five well records from area were used evaluate five machine models: K-Nearest Neighbors (KNNs), Random Forest (RF), Gradient Boosting Decision Tree (GBDT), Extreme (XGB), Deep Neural Network (DNN). The predictive results compared conventional for accurate predictions. Through K-fold cross-validation, ML models showed superior accuracy over models, DNN model displaying lowest root mean square error (RMSE) absolute (MAE). To enhance accuracy, δR was integrated new parameter into models. Comparative analysis revealed that improved DNN-R reduced MAE RMSE by 57.1% 70.6%, respectively, on training set, 59.5% 72.5%, test original model. Williams plot permutation importance confirmed reliability effectiveness of enhanced indicate potential technology valuable tool parameters, especially reservoirs lacking sufficient core samples relying solely basic well-logging data, signifying its effective assessment development.

Language: Английский

---

Research Progress in Nanoparticle Inhibitors for Crude Oil Asphaltene Deposition

Molecules, Journal Year: 2024, Volume and Issue: 29(5), P. 1135 - 1135

Published: March 3, 2024

Currently, the alteration of external factors during crude oil extraction easily disrupts thermodynamic equilibrium asphaltene, resulting in continuous flocculation and deposition asphaltene molecules oil. This accumulation within pores reservoir rocks obstructs pore throat, hindering efficient gas, consequently, affecting recovery gas resources. Therefore, it is crucial to investigate principles inhibition synthesis inhibitors. In recent years, development nanotechnology has garnered significant attention due its unique surface volume effects. Nanoparticles possess a large specific area, high adsorption capacity, excellent suspension catalytic abilities, exhibiting unparalleled advantages compared with traditional organic inhibitors, such as sodium dodecyl benzene sulfonate salicylic acid. At present, there are three primary types nanoparticle inhibitors: metal oxide nanoparticles, inorganic nonmetal nanoparticles. paper reviews advancements application challenges technology based on mechanism nano-inhibitors. The aim was provide insights for ongoing research this field identify potential future directions.

Language: Английский

---

Unveiling the Oldest Industrial Shale Gas Reservoir: Insights for the Enrichment Pattern and Exploration Direction of Lower Cambrian Shale Gas in the Sichuan Basin

Engineering, Journal Year: 2024, Volume and Issue: unknown

Published: April 1, 2024

The lower Cambrian Qiongzhusi (Є1q) shale in the Sichuan Basin, formerly considered a source rock, recently achieved high gas production (7.388 × 105 m3·d−1) from well Z201 Deyang–Anyue rift trough (DART), marking an exploration breakthrough of world's oldest industrial reservoir. However, enrichment mechanism within DART is not fully understood. This study reviews formation reservoirs by comparing them with cotemporaneous deposits outside DART, and several findings are presented. interval was correlated main phase explosion (lower stage 3). In early ecosystem, dominant animals likely accelerated settling rates organic matter (OM) upper 1st member Є1q (Є1q12) feeding on small planktonic organisms producing larger fragments fecal pellets. High primary productivity euxinic conditions contributed to OM (Є1q11). Additionally, inside demonstrated better properties than those terms thickness, brittle minerals, content, porosity. particular, abundant pores facilitated enrichment, whereas higher thermal maturity shales possibly led graphitization collapse some pores. Meanwhile, overpressure high-production wells generally reflects preservation, benefiting shale's self-sealing nature, "upper capping plugging" configuration, limited faults microfractures. Considering these insights, we introduced "ternary enrichment" model for gas. Although current found at reservoir 3, two additional were identified significant potential, thus suggesting "multilayer stereoscopic development" strategy future DART.

Language: Английский

---

Molecular Dynamics Simulations of Supramolecular Polymers within Nanoconfinements for Enhanced Oil Recovery

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(4), P. 5255 - 5267

Published: Jan. 19, 2024

Supramolecular polymers offer promising potential for enhanced oil recovery (EOR) advancing techniques. Current instrumental analyses face limitations in capturing instantaneous intracomplex motions due to temporal and spatial constraints. The molecular mechanism of supramolecular polymer transport behavior within nanoconfinement is not yet fully understood. Therefore, the self-assembly β-cyclodextrin (β-CD) adamantane (ADA)-modified (p-AA-β-CD-ADA) was delved into this work. Further exploration focuses on translocation dynamics p-AA-β-CD-ADA under external driving forces. Results suggest that β-CD ADA were assembled nodes form a host guest, combining with "node–rebar–cement" interaction model encapsulating formation these polymers. heightened density hydrate layers at nanoscale pore throats acts as constraining factor, resulting restricted mobility altered During passage through nanopore throats, host–guest molecules experience noncovalent dissociation. Notably, exhibit remarkable self-healing capabilities, reinstating their assembly state upon traversing throats. This work provides molecular-level comprehension utility EOR processes, offering valuable information design employed low-permeability reservoirs.

Language: Английский

---

Investigation on the anisotropy of meso-mechanical properties of shale rock using micro-indentation

Bulletin of Engineering Geology and the Environment, Journal Year: 2023, Volume and Issue: 83(1)

Published: Dec. 28, 2023

Language: Английский

---

Hydrogen bond recombination regulated by strongly electronegative functional groups in demulsifiers for efficient separation of oil–water emulsions

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 461, P. 132525 - 132525

Published: Sept. 12, 2023

Language: Английский

---

The Controls of Laminae on Lacustrine Shale Oil Content in China: A Review from Generation, Retention, and Storage

Energies, Journal Year: 2023, Volume and Issue: 16(4), P. 1987 - 1987

Published: Feb. 16, 2023

The successful development of shale oil in China has claimed that laminated is a favorable lithofacies for the effective extraction petroleum. Clarifying role laminae generation, migration, storage, and enrichment urgent important. Starting from describing classifying lamina, common methods terms used to delineate lamina types are briefly summarized. results different schemes often mutually inclusive, which prompted scholars work towards unified division scheme. influencing factors retention systems, including organic matter (OM) type, total carbon (TOC) content, OM maturity, mineral composition, pore structure, preservation conditions, systematically discussed. Subsequently, comparative on source rock quality, reservoir properties, hydrocarbon expulsion efficiency shales with laminar structures carried out. comparison reveal high efficiency. However, strong generation capacity superior storage space synergistically control considerable amount retained system. Especially mobility also considered because great size connectivity. fine evaluation structure prediction distribution significance selection “sweet spot area” or interval”.

Language: Английский

---