Article
Energy & Fuels
Zhao Wang, Hongming Tang, Jun Yang, Lu Huang
Summary: The relationship between pore characteristics and sedimentary microfacies of the unconsolidated sandstone reservoir in the Neogene Guantao Formation in the PLOilfield was investigated in this study. The results indicated that the pore structure of different sedimentary microfacies is influenced by factors such as sedimentary rock texture, siliceous minerals, and clay mineral distribution. The arenaceous microfacies had larger pore throat radius and lower pore fractal dimensions compared to the argillaceous microfacies. Additionally, empirical formulas for porosity, permeability, and pore throat radius were established based on conventional core tests.
Article
Energy & Fuels
Zhenghong Yu, Si Chen, Weidong Xie, Shu'e Zhao, Jianghao Ma, Tianhao Gong
Summary: This study identifies five types of sedimentary microfacies and analyzes the major diagenetic processes in sandstones through core observation and logging data. The results show that grain size is the primary controlling factor for reservoir quality, and it is influenced by sedimentary microfacies and diagenetic processes, which collectively affect the porosity and permeability of the reservoir.
Article
Geosciences, Multidisciplinary
Si Chen, Rui Zhao, Changwei Chen, Hua Wang, Jianghao Ma, Tianhao Gong, Zhenghong Yu
Summary: The Qikou Sag in the Bohai Bay Basin experienced tectonic and sedimentary evolution in stages 2-4, resulting in the deposition of oil-bearing sedimentary rocks. The depositional system exhibited retrogradation and then progradation in stage 2, retrogradation in stage 3, and upward coarsening and progradation in stage 4. These different stages corresponded to three episodic stages of rising and falling lake levels during the Paleogene.
MARINE AND PETROLEUM GEOLOGY
(2023)
Editorial Material
Environmental Sciences
Grisel Jimenez Soto
Summary: Grisel Jimenez Soto examines the ability of forward stratigraphic models to replicate the diverse sedimentary processes that affect the shape and distribution of sedimentary layers.
NATURE REVIEWS EARTH & ENVIRONMENT
(2023)
Article
Energy & Fuels
Rui Yang, Aoqi Jia, Sheng He, Tao Wang, Qinhong Hu
Summary: The pore characteristics and reservoir quality of analcite-rich shale oil reservoir in the Bohai Bay Basin were studied using various techniques, identifying six typical shale lithofacies. Siliceous shale showed high matrix permeability and good pore connectivity, while analcite-rich shale exhibited larger specific surface area and micropore volume. The authigenic analcite mineral had different effects on pore development and reservoir quality, with some primary pores lost but new secondary dissolution pores generated during diagenesis processes. Additionally, total organic carbon content also played a role in controlling reservoir quality.
Article
Energy & Fuels
Hua Fan, Juye Shi, Tailiang Fan, Zhiqian Gao, Yu Gu, Ze Gao, Tonghu Zhang, Yu Li, Bo Li
Summary: This study presents a feasible method for sedimentary microfacies analysis by combining FMI logs and conventional logs in the Middle Ordovician Tahe Oilfield in the Tarim Basin, China. The results show that the combination of FMI logs and conventional logs improves the accuracy of sedimentary microfacies identification and expands the application of FMI logs in carbonate microfacies interpretation. This method contributes to a better understanding of sedimentary facies distribution in the Ordovician strata of the Tahe Oilfield, Tarim Basin, China.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Hangyu Liu, Kaibo Shi, Bo Liu, Xinmin Song, Rui Guo, Genjiu Wang, Huan Wang
Summary: The Middle Cretaceous Rumaila Formation in the Central Mesopotamian Basin is composed of thick carbonate deposits and serves as a significant reservoir unit. The microfacies analysis revealed vertical variations and distinct reservoir qualities within different sedimentary facies belts. This study highlights the importance of sedimentary facies variation and early diagenesis in controlling reservoir quality and heterogeneity, providing insights for predicting reservoir quality in carbonate reservoirs with similar sedimentary and diagenetic processes.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Huan Wang, Kaibo Shi, Yongsheng Ma, Bo Liu, Xinmin Song, Yuzhu Ge, Hangyu Liu, Rene Hoffmann, Adrian Immenhauser
Summary: The study on Mishrif carbonates in the Central Mesopotamian Basin of Iraq shows a wide range of rock fabrics and diagenetic features that impact reservoir quality and flow properties. A homoclinal ramp geometry model with twelve microfacies types is proposed, showing low-energy conditions in the ramp. Two main diagenetic features shape reservoir properties, including early diagenetic dissolution and preferential cementation, leading to distinctive reservoir qualities.
MARINE AND PETROLEUM GEOLOGY
(2021)
Article
Energy & Fuels
Han Guomeng, Wang Li, Xiao Dunqing, Lou Da, Xu Muyue, Zhao Yonggang, Pei Yanlu, Guo Xiaowen, Teng Jiancheng, Han Yuanjia
Summary: The study utilized multiple techniques to investigate hydrothermal fluid-rock interactions in the Kong 2 Member of the Zaoyuan oilfield, identifying the presence of magmatic hydrothermal fluid as a potential cause for the abnormal enrichment of zeolite in the Cangdong Sag.
PETROLEUM EXPLORATION AND DEVELOPMENT
(2021)
Article
Geosciences, Multidisciplinary
Xiaona Zhang, Yanbin Yao, Guibin Zhang, Ruying Ma, Zefan Wang
Summary: This study used cores, thin sections, imaging logs, and laboratory measurements to investigate the factors influencing the formation and development of natural fractures in the Bozhong 19-6 gas field. Both tectonic fractures and dissolution fractures are well developed and interconnected. Lithology, stress, and weathering were found to affect fracture formation and development. A reservoir evolution pattern was proposed to target favorable reservoirs in the study area.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Ningliang Sun, Tianyu Chen, Jianbo Gao, Jianhua Zhong, Zhipeng Huo, Junli Qu
Summary: This study examined the fine-grained sedimentary rocks in the Dongpu Sag, Bohai Bay Basin to understand their lithofacies classification, sedimentary environment, reservoir quality, and shale oil potential. The results showed that the rocks were deposited in deep anoxic lacustrine environments and contained macro and mesopores, with the former primarily composed of interparticle pores between calcite and microfractures, and the latter controlled by clay and quartz-feldspathic minerals. The presence of recrystallized calcite laminae indicated high-quality shale oil reservoirs. These findings have important implications for shale oil development in similar saline lacustrine basins worldwide.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)
Article
Geochemistry & Geophysics
Jia Li, Chengyan Lin, Xianguo Zhang, Chunmei Dong, Yannan Wei, Wenyan Ning, Changcheng Han, Wei Guo
Summary: The study focuses on utilizing multipoint geostatistics (MPS) for modeling meandering river reservoirs, including establishing structural models at different scales and collaboratively simulating permeability models through permeability function sets.
Article
Geosciences, Multidisciplinary
Hai Liu, Mian Zhang, Xiaoming Chi
Summary: A seismic sedimentology study was conducted to analyze the complex fluvial reservoirs in the Neogene Guantao Formation in Kongdian Oilfield. Three facies associations were identified, and stratal slices were generated to analyze sediment distribution, revealing the evolution of fluvial channel systems in the study interval.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Ze Tao, Zhiliang He, Tiago M. Alves, Xiaowen Guo, Jian Gao, Sheng He, Wen Zhao
Summary: This study investigated the structural evolution in the Lijin and Boxing sags in the Dongying depression and found that inherited structures significantly control the development of overpressure in sedimentary basins.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Engineering, Chemical
Zehua Zhang, Chunqiang Xu, Chenjie Wang, Hong Li, Wensen Zhu, Hongliang Wang, Kaixuan Liang, Yong Su
Summary: This paper introduces a new method incorporating geophysical analysis and geological analysis to define the sedimentary characteristics and distributions in basins with few drilling wells. The method utilizes a compatible geological model, interprets seismic data, and verifies the results through seismic forward modeling. The study accurately defines the sedimentary characteristics and distributions of the study area, providing valuable information for oil and gas exploration.
Article
Geochemistry & Geophysics
Wenguang Wang, Min Wang, Shuangfang Lu, Chengyan Lin, Min Zheng
Summary: The hydrocarbon yield of source rocks is crucial for evaluating oil and gas resources. This study established an evaluation method and charts for the hydrocarbon yield of source rocks based on thermal pyrolysis experiment data, hydrocarbon generation kinetics models, and geological data. The concept of degree of openness was proposed, and it was found that the hydrocarbon yield of source rocks in a semiopen system is closer to the actual yield under geological conditions.
INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
(2022)
Review
Energy & Fuels
Shuangfang Lu, Junqian Li, Dianshi Xiao, Haitao Xue, Pengfei Zhang, Jijun Li, Fangwen Chen, Wenbiao Huang, Min Wang, Wenhao Li, Zhongcheng Li
Summary: The grading evaluation of shales is important for understanding shale reservoir formation and sweet-spot screening. The authors propose a new classification method based on comprehensive characterization of various shales. Results show that shale reservoirs can be divided into different grades based on the microscopic pore-throats. This classification scheme is applicable for evaluating shale reservoirs using logging data.
Article
Energy & Fuels
Pengfei Zhang, Shuangfang Lu, Zizhi Lin, Hongliang Duan, Xiangchun Chang, Yongfeng Qiu, Qian Fu, Qi Zhi, Junjie Wang, Hongsheng Huang
Summary: This study developed a set of models to correct the losses of light and heavy hydrocarbons in the pyrolysis parameter S1 using conventional and multistage Rock-Eval experiments. The estimation models of adsorbed, free, and movable amounts of oil were determined and validated. The results showed that the correction models can accurately estimate the oil content in shale, which is crucial for shale oil exploration and development.
Article
Astronomy & Astrophysics
Nengwu Zhou, Min Wang, Shuangfang Lu, Thomas J. H. Dodd, Wei Liu, Ying Guan
Summary: This study presents experimental evidence to show that geological processes can alter the pore fractal structure of rocks and discusses the evolutionary mechanism of this structure. The study links the diagenetic alteration and fractal properties of rocks, providing practical applications such as predicting permeability.
EARTH AND SPACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Lu Qiao, Huijun Wang, Shuangfang Lu, Yang Liu, Taohua He
Summary: In this study, a new approach to construct adaptive proxy models for production optimization problems is proposed. The approach utilizes an adaptive difference evolution algorithm to optimize the least-squares support vector machine as an approximation function, and training is performed using a self-adaptive response surface experimental design. The results show that this method can enhance the prediction accuracy and improve the optimization process.
Article
Energy & Fuels
Pengfei Zhang, Yajie Yin, Shuangfang Lu, Junqian Li, Xiangchun Chang, Junjian Zhang, Yumao Pang, Guo Chen, Yuqi Liu, Zhen Li
Summary: The study applies the multifractal theory to analyze the pore structure of shale oil and finds that different types of shale have different characteristics in terms of NMR porosity, BET SSA, and organic content, which affect the favorability of shale oil reservoirs. Furthermore, the study reveals the multifractal nature and complexity of shale pore structures.
Article
Energy & Fuels
Shengxian Zhao, Shuangfang Lu, Jianfa Wu, Wenbiao Li, Yongyang Liu, Junqian Li, Jian Zhang, Ziqiang Xia, Shan Huang
Summary: Experimental methods and classification criteria for gas-bearing properties, such as gas-in-place (GIP) content and adsorbed gas ratio (AGR), were developed for shale gas evaluation. The accuracy of different GIP content evaluation methodologies was compared, with the simplified carbon isotope fractionation (s-CIF) model showing the highest accuracy. The influencing factors for calculation error of the United States Bureau of Mines (USBM) method were examined.
Article
Energy & Fuels
Weichao Tian, Shuangfang Lu, Zhigang Wen, Xiu Chen, Yang Gao, Yang Li
Summary: This study proposed an improved method that combines nuclear magnetic resonance (NMR) tests and multicycle mercury intrusion porosimetry to quantitatively evaluate the microdistributions of different fluid types, classify the pore throat structure, and analyze the relationship between pore throat structure and different fluid types in low-permeability conglomerates. The study found that the movable fluids were mainly distributed in macropore throats and mesopore throats, capillary-bound fluid (CAF) mainly existed in micropore throats, and clay-bound fluid (CLF) was mainly distributed in clay-related pores.
Article
Geosciences, Multidisciplinary
Nengwu Zhou, Jiamin Lu, Shuangfang Lu, Pengfei Zhang, Min Wang, Zizhi Lin, Xinyu Jiang, Yang Liu, Guangshun Xiao
Summary: The petrological, mineralogical, and pore structure characteristics of sandstone and conglomerate were investigated to understand how depositional and diagenetic processes control reservoir quality. It was found that the content and type of matrix and lithic clasts in the sedimentary rock unit played a crucial role in controlling reservoir properties. High-quality reservoirs were more likely to be developed in specific sedimentary environments.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Energy & Fuels
Xiao Li, Shuangfang Lu, Shaojun Liu, Junqian Li, Xiaoting Pang, Wenbiao Li, Jun Wang
Summary: The carbon isotope fractionation model was used to evaluate the gas-bearing parameters and shale gas content in the Well JY A. The study found that the GIP content of shale ranged from 2.52 to 5.11 mL/g, with an average of 3.56 mL/g, and the adsorbed gas ratio accounted for 4.39%-30.28%, with an average of 14.64%. This method provides a more accurate assessment of shale gas resources compared to traditional methods.
Article
Geosciences, Multidisciplinary
Pengfei Zhang, Shuangfang Lu, Junqian Li, Junjie Wang, Junjian Zhang
Summary: This paper proposes an innovative approach based on experimental and theoretical models to investigate the oil occurrence mechanism in nanoporous shales. The migrations and distributions of adsorbed, irreducible, and movable oils were investigated using thermogravimetry (TG) and nuclear magnetic resonance (NMR) tests. The results showed that adsorbed, irreducible, and movable oils occur in different pore sizes. The study also reported the NMR T1-T2 patterns of the adsorbed, irreducible, and movable oils, which can directly reveal the states of oil micro-occurrence in shale pore-fracture systems.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Ziyi Wang, Nengwu Zhou, Shuangfang Lu, Yancheng Liu, Liming Lin, Yang Liu, Bo Song
Summary: This study investigates the generation, accumulation, and distribution of tight sandstone gas in the Linxing-Shenfu gas fields in the northeastern margin of the Ordos Basin. It utilizes various approaches and data analysis to characterize different types of reservoirs and their formation mechanisms.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Engineering, Chemical
Jiayu Zheng, Weichao Tian, Yang Gao, Zhigang Wen, Yunpeng Fan, Heting Gao, Shuangfang Lu, Xiaoyin Zheng
Summary: The pore structure and its complexity in low-permeability conglomerates were investigated in this study. The results showed that the pore system consists of multiple pore types, broad pore size distribution, and extremely irregular pore morphology. The fractal dimension of macropores increases with the increase of clay content and the decrease of quartz and feldspar contents. Moreover, the volume of macropores decreases with the increase of clay content and the decrease of quartz and feldspar contents. D3 and macropore volume control the physical properties and fluid mobility of conglomerates.
Article
Chemistry, Multidisciplinary
Pengfei Zhang, Shuangfang Lu, Junqian Li, Junjie Wang, Junjian Zhang, Yajie Yin
Summary: Heat treatment has a significant impact on the pore structure of shale reservoirs. This study conducted various tests and found that the decomposition of organic matter leads to a decrease in total organic carbon content. The pore structure of shale with low total organic carbon content showed different trends, and the content of organic matter and clay minerals were found to be the main factors controlling the pore structure during heat treatment.
Article
Energy & Fuels
Pengfei Zhang, Yajie Yin, Shuangfang Lu, Junjie Wang, Junjian Zhang, Qi Zhi, Hongsheng Huang
Summary: This study investigated the characteristics of lacustrine shales from the Funing Formation in the Gaoyou Sag, Subei Basin, using various methods. The results showed that the organic matter abundance and reservoir space development were key factors controlling shale oil content.
GEOENERGY SCIENCE AND ENGINEERING
(2023)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)
