Article
Geosciences, Multidisciplinary
Wenbiao Zhang, Zhiliang He, Taizhong Duan, Meng Li, Huawei Zhao
Summary: This study successfully quantitatively characterized and geologically modeled the fault/fracture-controlled paleokarsts through the establishment of a hierarchical structure and a hierarchical modeling method. The research was validated in the Tahe oilfield and can reflect the spatial structure of fault/fracture-controlled paleokarst carbonate reservoirs.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geochemistry & Geophysics
Ping Ren
Summary: The microfacies types and reservoir space characteristics of the Yingshan Formation in the Tarim Basin were systematically studied using core, thin section, logging data, imaging logging data, and field outcrop. The results show that there are nine microfacies and four microfacies associations in the formation, with high-energy microfacies forming favorable reservoirs and low-energy microfacies forming relatively small-scale fractured and fracture-dissolution pore types of reservoirs.
Article
Geosciences, Multidisciplinary
Siqi Ouyang, Xiuxiang Lu, Han Quan, Rizwan Sarwar Awan, Jianxun Zhou, Rui Wang
Summary: This research explores the evolution process and factors influencing the tight carbonate caprock of the Yingshan Formation in the Ordovician Tarim Basin using laboratory experiments and data analysis. Karstification and cementation are found to be crucial factors affecting the evolution and distribution of the caprock. Factors such as paleogeomorphology, phreatic surfaces, original sedimentary environment, and fault distribution influence karstification, while buried fluids control cementation. Understanding the evolution of the caprock is important for evaluating carbonate reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Bo Jiu, Wenhui Huang, Nana Mu, Ruilin Hao
Summary: Paleokarst carbonate reservoirs play a crucial role in oil and gas exploration, and the study of ultra-deep karst-hydrothermal reformed carbonate reservoirs in the Yubei area provides insights into the paleokarst periods, chemical properties of hydrothermal fluids, and the formation mechanism of these reservoirs.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Engineering, Marine
Zhan Zhao, Jingtao Liu, Wenlong Ding, Ruiqiang Yang, Gang Zhao
Summary: This study utilized seismic data and variance attribute to identify two types of fault damage zones and analyzed their spatial geometric characteristics. The results showed significant differences in width between the two types of damage zones, with width and throw of the zones following a power-law distribution. Factors affecting width and formation process were discussed, along with the impact of damage zones on oil and gas exploration. Seismic variance attribute was deemed a useful technique for characterizing ultra-deep strike-slip fault damage zones.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Geosciences, Multidisciplinary
Fei Tian, Jiangyun Zhang, Wenhao Zheng, Hui Zhou, Qihao Ma, Chunguang Shen, Qingyou Ma, Mingjie Lan, Yunchen Liu
Summary: Large-scale strike-slip faults can create porous carbonate reservoirs and oil and gas reservoirs, but their complex heterogeneity poses challenges to accurately determining reservoir geometry. This study proposes an innovative Geology-Geophysics-Data Mining workflow to enhance the resolution of multiscale geophysics data through geological insights. The workflow includes noise reduction, computation of impedance curves, quantification of impedance from stable sedimentary features, and validation using well log data. The findings provide a reliable foundation for directional drilling and hydrocarbon accumulation studies.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geochemistry & Geophysics
Yong Dan, Guoquan Nie, Bin Liang, Qingyu Zhang, Jingrui Li, Hongqi Dong, Shaocong Ji
Summary: The karst fracture-cave oil and gas reservoirs in the Yingshan Formation of the Tazhong Uplift have shown good exploration results, but mud fillings near the top impact the reservoir property. Petrological and geochemical analysis revealed the mud fillings are a mixture of dissolution particles, clay minerals, and calcite cements, possibly derived from early seawater during deposition. Oxygenated conditions during the hypergene period led to the filling of fractures and caves, with effects from meteoric freshwater dissolution and seawater transgression.
Article
Energy & Fuels
Ying Bai, Wei Liu, Wanglin Xu
Summary: This study examines the formation process and impact on reservoirs of the dolomite reservoirs in the Ordovician formations in the Tarim Basin. By analyzing petrological and geochemical data, the study finds that different dolomites have different dolomitization mechanisms. The results show that sabkha and reflux dolomitization were the primary mechanisms and have a significant impact on pore formation.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Yong Dan, Junjie Ba, Bin Liang, Qingyu Zhang, Jingrui Li, Guoquan Nie
Summary: This study summarizes the physical and chemical characteristics of inclusions in the northern slope of the Tazhong area based on testing of inclusions in karst fractures and fracture-cave calcite. The major inclusions are liquid and gas-liquid phases, with minor hydrocarbon phases. The development of inclusions is characterized by high temperature and high salinity or low temperature and low salinity. The formation of karst reservoirs in the Tazhong area is found to be associated with eogenetic karstification of meteoric water and seawater in the Middle Caledonian period.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
Xintong Wang, Jian Wang, Yingchang Cao, Jun Han, Kongyou Wu, Yin Liu, Keyu Liu, Mingfeng Xie
Summary: The Ordovician carbonate fault-controlled reservoir in the Shunnan area is different from typical karst reservoirs. The development of this reservoir is influenced by a deep and large strike-slip fault. Various data analyses were conducted to study the characteristics, diagenesis types, diagenetic fluid evolution, fluid-rock interactions, and reservoir response. The results showed that areas with releasing bend and superimposed parts in the fault zone are where fluid dissolution and transformation occur preferentially. Dolomite is conducive to the development of fault fracture zones and promotes the dissolution and transformation of deep thermal fluid.
MARINE AND PETROLEUM GEOLOGY
(2022)
Article
Geochemistry & Geophysics
Wenbo Zhang, Guangwei Wang, Zicheng Cao
Summary: This study investigates the impact of reflux dolomitization on carbonate sediment reservoir quality, evaluating the sensitivity of dolomitization using three-dimensional reactive transport models. The results show that factors such as permeability, injection rate, and geothermal gradient are closely related to dolomitization.
Article
Geochemistry & Geophysics
Wenbiao Zhang, Zhiliang He, Taizhong Duan, Qiqi Ma, Meng Li, Huawei Zhao
Summary: Carbonate fault-controlled karst reservoirs are unique due to their buried depth and significant heterogeneity compared to other reservoir types. This study focuses on the Shunbei 5 fault zone in the Tarim Basin and presents a 3D architectural model based on various data sources. The characterization of fault-controlled karst reservoirs is essential for efficient development. The study identifies five architectural elements and proposes techniques to predict their distribution.
INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION
(2023)
Article
Geochemistry & Geophysics
Yuyong Yang, Jun Lu, Haiying Li, Qiaomu Qi, Huailai Zhou
Summary: The study introduces a novel workflow for predicting spatial fracture distribution in the Sangtamu carbonate formation using S-wave splitting (SWS) analysis of a 3D3C vertical seismic profiling (VSP) data set. The proposed method demonstrates good agreement with well-log data and can serve as a quantitative diagnostic tool for fractures in a carbonate reservoir.
Article
Energy & Fuels
Hua Liu, Yu-Wei Yang, Bin Cheng, Zi-Cheng Cao, Shen Wang, Zi-Yue Jiang, Fei-Fei Yuan
Summary: The Lower-Middle Ordovician reservoir bitumen in the Shunnan area of the Tarim Basin is influenced by various geological events, with hydrothermal activity and thermochemical sulfate reduction playing significant roles in its characteristics and origins. Wells with hydrothermal activity show higher RB contents and abnormal maturity due to Early Permian hydrothermal activity, while the cracking of crude oil is a key factor in the widespread distribution of RB.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Baiwen Huang, Shaonan Zhang, Ziye Lu, Ning Ye, Bei Zhu, Xiaoqi Ding, Yingtao Li
Summary: Through a combination of various tools, the study successfully identified the types and origins of dolomites in the Yingshan Formation of the Gucheng area in the Tarim Basin, including three primary matrix dolomites and three special cements. These dolomites were formed in different burial environments, with some influenced by hydrothermal fluid mixtures.
MARINE AND PETROLEUM GEOLOGY
(2021)
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)