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Overcoming complex near-surface conditions for improved seismic imaging in Tarim Basin, China

Leading Edge 2025年第3期44卷 206-213页

作者： Zhao, ruirui Zheng, duoming Yang, Shanshan Zuo, Anxin Chen, Yangyang Zhu, Xianhuai Xu, Ken Gray, Sam PetroChina Tarim Oilfield Company Research Institute of Exploration and Development Xinjiang Korla China CNPC R&D Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Korla China Engineering Research Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang China Forland Geophysical Services HoustonTX United States Viridien CalgaryAB Canada

Seismic imaging in the Tarim Basin, China, presents significant challenges due to complex near-surface conditions, including desert environments, foothills, and loess mountains. These challenges are comparable to those found in regions such as the Arabian Peninsula, North Africa, the Andes Mountains, and other complex terrains worldwide. recent advancements in seismic imaging aimed at overcoming these obstacles include: (1) advanced constrained near-surface tomography, which has significantly enhanced the robustness of near-surface velocity-depth model estimation, leading to improved resolution of deep reservoir images;(2) a recent ultra-long-offset (greater than 15 km) experiment in the foreland basin of the Tarim Oilfield, demonstrating that more accurate and deeper near-surface velocity models can be generated on land using turning-ray tomography;(3) finite-frequency wavepath tomography, which has been proven through field data examples to be a robust alternative to traditional full-waveform inversion for land seismic data;and (4) integrated tomography, which combines diving waves and reflected seismic data to develop a comprehensive velocity model from shallow to deep sections for anisotropic prestack depth migration from topography. These technologies, developed for and applied to the Tarim Basin, can be applied, with modifications, to other land basins around the world. © 2025 by The Society of exploration Geophysicists.

关键词： Watersheds

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drilling design and Optimization Technology for ultra deep Wells in Tarim Oilfield:A Case Study of Well Take-1, the deepest Well in Asia 58

Drilling Design and Optimization Technology for Ultra Deep W...

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58th US rock Mechanics / Geomechanics Symposium 2024, ArMA 2024

作者： ChunSheng, Wang ShaoBo, Feng Zhi, Zhang Bo, Zhou XiaoLiang, Wang XiaoGang, Lv JinLong, Liu Bao, Zhou R&D Center for Ultra Deep Complex Reservior Exploration and Development CNPC Korla China

ISBN: (纸本)9798331305086

The Tarim Basin is a Precambrian superimposed composite *** main source rocks are characterized by ultra-deep and ancient *** 2023, based on the dual goals of oil and gas discovery and scientific exploration, Tarim Oilfield proposed the deepest exploration target in China named Take-1, to explore deeper carbonate oil and gas reservoirs under the Fuman Oilfield, with a designed vertical depth of 11,100 *** order to achieve drilling goals safely and efficiently, pioneering work has been done in drilling *** drilling design is based on comprehensive geological engineering *** design of the upper casing reaches the deepest depth in the area, and engineering technical measures are adopted to achieve the drilling of multiple sets of *** force of wellhead tools on ultra-long and overweight casing is simulated and calculated to avoid the casing entering the plastic deformation state during the running *** parameters and vibration effects shall be fully considered during the design of drilling tool assembly to realize safe *** research and field implementation progress show that the key technology of the drilling design of Take-1 can solve the series of drilling difficulties faced and achieve the goal of the 10,000-meter drilling project. Copyright 2024 ArMA, American rock Mechanics Association.

关键词： deep oil well drilling

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New progress and future exploration targets in petroleum geological research of ultra-deep clastic rocks in Kuqa depression,Tarim Basin,NW China

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Petroleum exploration and development 2025年第1期52卷 79-94页

作者： WANG Qinghua YANG Haijun YANG Wei R&D Center for Ultra-Deep Complex Reservoir Research and Development CNPCKorla 841000China Tarim Oilfield Company PetroChinaKorla 841000China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China

Significant exploration progress has been made in ultra-deep clastic rocks in the Kuqa depression,Tarim Basin,over recent years.A new round of comprehensive geological research has formed four new understandings:(1)Establish structural model consisting of multi-detachment composite,multi-stage structural superposition and multi-layer ***-stage structural traps are overlapped vertically,and a series of structural traps are discovered in underlying ultra-deep layers.(2)Five sets of high-quality large-scale source rocks of three types of organic phases are developed in the Triassic and Jurassic systems,and forming a good combination of source-reservoir-cap rocks in ultra-deep layers with three sets of large-scale regional reservoir and cap rocks.(3)The formation of large oil and gas fields is controlled by four factors which are source,reservoir,cap rocks and *** on the spatial configuration relationship of these four factors,a new three-dimensional reservoir formation model for ultra-deep clastic rocks in the Kuqa depression has been established.(4)The next key exploration fields for ultra-deep clastic rocks in the Kuqa depression include conventional and unconventional oil and *** conventional oil and gas fields include the deep multi-layer oil-gas accumulation zone in Kelasu,tight sandstone gas of Jurassic Ahe Formation in the northern structural zone,multi-target layer lithological oil and gas reservoirs in Zhongqiu–dina structural zone,lithologic-stratigraphic and buried hill composite reservoirs in south slope and other favorable *** oil and gas fields include deep coal rock gas of Jurassic Kezilenuer and Yangxia formations,Triassic Tariqike Formation and Middle-Lower Jurassic and Upper Triassic continental shale *** achievements have important reference significance for enriching the theory of ultra-deep clastic rock oil and gas exploration and guiding the future oil and gas exploration deployment.

关键词： Tarim Basin Kuqa depression ultra-deep layers clastic rock multi-layer structural deformation multilayered migration and accumulation new three-dimensional accumulation model

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Study on the Seepage Characteristics of deep Tight reservoirs Considering the Effects of Creep

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Energy Engineering 2025年第5期122卷 1735-1754页

作者： Yongfu Liu Haitao Zhao Xingliang deng Baozhu Guan Jing Li Chengqiang Yang Guipeng Huang R&D Center for Ultra-Deep Complex Reservoir Exploration and Development China National Petroleum CorporationKorla841000China National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580China

The seepage characteristics of shale reservoirs are influenced not only by multi-field coupling effects such as stress field,temperature field,and seepage field but also exhibit evident creep characteristics during oil and gas *** complex fluid flow in such reservoirs is analyzed using a combination of theoretical modeling and numerical *** study develops a comprehensive mathematical model that integrates the impact of creep on the seepage process,with consideration of factors including stress,strain,and time-dependent *** model is validated through a series of numerical experiments,which demonstrate the significant influence of creep on the seepage *** results indicate that the rock mechanical parameters and creep constitutive model were determined through triaxial compression tests and uniaxial creep tests.A creep-seepage coupling control equation for shale was established based on the Burgers creep *** absolute value of the volumetric strain of shale increases rapidly in the initial creep stage,and the increase in vertical stress accelerates the rock’s creep *** the deceleration creep stage,the volumetric strain of the reservoir increases rapidly,leading to a significant decrease in *** the stable creep stage,the pores and fractures in the rock are further compressed,causing a gradual reduction in permeability,which eventually stabilizes.

关键词： Tight reservoir mechanical parameter creep model multi-field coupling seepage characteristics

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Facies-Controlled Pre-Stack Geostatistical Inversion for Enhancing Prediction Accuracy in ultra-deep, Low-Permeability Gas reservoirs: A Study of the Cretaceous Yageliemu Formation in the Kuqa depression 12

Facies-Controlled Pre-Stack Geostatistical Inversion for Enh...

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12th Academic Conference of Geology resource Management and Sustainable development, GrMSd 2024

作者： Cheng, Suo Yuan, Yuan Chen, Wei-Li Li, Qing Research Institute of Exploration & Development PetroChina Tarim Oilfield Company Xinjiang Korla841000 China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Korla841000 China Xinjiang Engineering Research Center for Ultra-deep Complex Reservoir Exploration and Development Xinjiang Korla841000 China Xinjiang Key Laboratory of Ultra-deep Oil and Gas Xinjiang Korla841000 China

ISBN: (纸本)9798331314545

The Cretaceous Yageliemu Formation gas reservoirs in the Kuqa depression of the Tarim Basin are characterized by deep burial, complex lithology, and low permeability, posing significant challenges for development. To improve development efficiency, this study employs pre-stack geostatistical inversion with facies control to enhance the accuracy of sandbody prediction. The ratio of compressional to shear wave velocity (Vp/Vs) was jointly applied to identify favorable reservoirs. Subsequently, tasks such as pre-stack inversion data preparation, variogram simulation without well constraints, and variogram range optimization were carried out. This led to the establishment of a comprehensive prediction method for favorable reservoirs in low-permeability reservoirs based on facies-controlled pre-stack geostatistical inversion. The inversion results significantly improved reservoir prediction accuracy, with sandbody thickness prediction accuracy reaching 93%-95%, and strong alignment with geological trends. The prediction outcomes effectively delineate the distribution of favorable reservoirs in low-permeability zones and have achieved promising application results in well placement and deployment. © 2024 Proceedings of the 12th Academic Conference of Geology resource Management and Sustainable development, GrMSd 2024. All rights reserved.

关键词： Low permeability reservoirs

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Formation mechanism and reservoir quality evaluation in tight sandstones under a compressional tectonic setting: the Jurassic Ahe Formation in Kuqa depression, Tarim Basin, China

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Petroleum Science 2025年第03期 998-1020页

作者： dong Li Gui-Wen Wang Kang Bie Jin Lai de-Wen Lei Song Wang Hai-Hua Qiu Hong-Bo Guo Fei Zhao Xing Zhao Qi-Xuan Fan National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum (Beijing) College of Geosciences China University of Petroleum (Beijing) Research Institute of Petroleum Exploration and Development Tarim Oilfield Company CNPC R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Exploration Division Xinjiang Oilfield Company CNPC

The northern structural belt of Kuqa depression is adjacent to the South Tianshan orogenic belt, which are characterized by complex geological conditions. The reservoir quality of the Jurassic Ahe Formation is controlled by sedimentation, diagenesis, and tectonics, and show complex pore structure and strong heterogeneity, thereby hindering effective natural gas exploration and development. Core, thin sections,cathodoluminescence(CL), scanning electron microscopy(SEM), conventional well logs and image logs are used to characterize the petrological characteristics and pore systems. Then a comprehensive analysis integrating sedimentation, diagenesis, and tectonics is performed to unravel the reservoir formation mechanism and distribution of reservoir quality. results show that reservoir properties are generally environmentally selective. Coarse grained sandbodies(gravelly sandstones) formed in high depositionalenergy have the best physical properties, while fine sandstone and mudstone with low depositional energy is easily to be tightly compacted, and have poor reservoir quality. Porosity usually decreases with compaction and cementation, and increases due to dissolution. Clay minerals filling pores result in a deterioration of the pore structure. Microfracture formed by fracturing can connect the matrix pores,effectively improving the reservoirs' permeability. The differential distribution of fractures and in-situ stress plays an important role in modifying reservoir quality. The in-situ stress has obvious control over the matrix physical properties and fracture effectiveness. The matrix physical properties are negatively correlated with the value of horizontal stress difference(Δσ). As the value of Δσ increases, the pore structure becomes more complex, and the macroscopic reservoir quality becomes poor. The smaller the strike divergence between the natural fracture and SHmax, the lower the value of Δσ in the fracture layers is, and the better the fracture effectivene

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Innovative Fluid Characterization Methodology for ultradeep Tight reservoirs in different Formation Types: Tarim Basin Case Studies

Innovative Fluid Characterization Methodology for Ultradeep ...

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2025 International Petroleum Technology Conference, IPTC 2025

作者： Huan, Zhipeng Zhang, Wei Ni, Xiaowei Ai, Yong Cai, Liang Wang, Wei Wu, Jin Long Cao, Yingchang China University of Petroleum Shandong Qingdao China PetroChina Tarim Oilfield Company Xinjiang Korla China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Xinjiang Korla China SLB Beijing China

ISBN: (纸本)9781959025436

The Tarim Basin, located in the Xinjiang Uygur Autonomous region of China, is renowned for its substantial oil and gas reserves. The geological formations in the basin span various geological periods, contributing to its rich hydrocarbon resources. The reservoir is located deep to more than 8000 meters vertically and consists of various lithologies. The reservoirs are rich in fractures but have tight petrophysical properties. Fluid identification is crucial to locate the sweet spot for exploration and development. resistivity is the most common and straight-forward method for fluid identification, however, because of the mixed effects from pore structure, the influence of the surrounding rocks formation, sedimentary dips, and far-end fractures etc., hydrocarbons and water cannot be easily distinguished based on the resistivity difference. In tight carbonates, the Archie equation is not a satisfactory solution due to the reservoir's strong heterogeneity in mineralogy and pore structure. The compressional coefficient and Poisson's ratio do not exhibit an obvious crossover effect because of the compaction effect on rock sonic waves. New wireline logging techniques were developed to provided non-electrical solutions, including T1-T2 based nuclear magnetic resonance (NMr), advanced spectroscopy and pulsed neutron measurements. T1-T2 based 2d NMr measurements provide porosity and permeability information from T2-based analysis. When used in conjunction with T1 -based measurements, fluid identification through different T1-T2 response offers an advantage for distinguishing hydrocarbons and water. The continuous measurement enables separation and quantitation of different fluids within the pore system throughout the entire interval of the targeted reservoir. Advanced spectroscopy uses both capture and inelastic gamma ray spectroscopy measurements, providing precise dry weights for elements and minerals, along with total organic carbon (TOC). It also provides thermal neutron

关键词： Proven reserves

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Study on the Fluid-Solid Coupling Seepage of the deep Tight reservoir Based on 3d digital Core Modeling

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Energy Engineering 2025年第2期122卷 537-560页

作者： Haijun Yang Zhenzhong Cai Hui Zhang Chong Sun Jing Li Xiaoyu Meng Chen Liu Chengqiang Yang PetroChina Tarim Oilfield Company Korla841000China CNPC R&D Center for Ultra-Deep Complex Reservoir Exploration and Development Korla841000China National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao266580China Structure and Shipping Department Offshore Oil Engineering(Qingdao)Co.Ltd.Qingdao266520China

deep tight reservoirs exhibit complex stress and seepage fields due to varying pore structures,thus the seepage characteristics are significant for enhancing oil *** study conducted triaxial compression and permeability tests to investigate the mechanical and seepage properties of tight sandstone.A digital core of tight sandstone was built using Computed Tomography(CT)scanning,which was divided into matrix and pore phases by a pore equivalent diameter threshold.A fluid-solid coupling model was established to investigate the seepage characteristics at *** results showed that increasing the confining pressure decreased porosity,permeability,and flow velocity,with the pore phase becoming the dominant seepage *** and large pores closed first under increasing pressure,resulted in a steep drop in ***,permeability slightly decreased under high confining pressure,which followed a first-order exponential *** velocity increased with seepage *** the damage mainly occurred in stress-concentration regions under low seepage *** behavior followed linear darcy flow,the damage emerged at seepage entrances under high pressure,which decreased rock elastic modulus and significantly increased permeability.

关键词： digital core fluid-solid coupling pore structure microscopic seepage

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Optimization calculation method of ultra-deep production logging velocity profile correction coefficient 6

Optimization calculation method of ultra-deep production log...

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6th International Conference on Internet of Things, Automation and Artificial Intelligence, IoTAAI 2024

作者： Wang, Huawei Zhu, Lei Liu, Xianyuan Liu, Zhizhen Zhou, Wenyuan Tian, Longmei Song, Wenguang Tarim Oilfield Company PetroChina Xinjiang Korla841000 China Cnpc R&d Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Korla841000 China Engineering Research Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Uygur Autonomous Region Xinjiang Korla841000 China Guangdong Ocean University School of Computer Science and Engineering Yangjiang529500 China

ISBN: (纸本)9798350386974

In recent years, with the continuous development of China's industry, the country's demand for petroleum energy has also increased. Therefore, maintaining stable production in oil fields is crucial for ensuring the stable development of the Chinese economy. dynamic monitoring of production logging is an important means of stabilizing and increasing oil and gas production. Generally, the flow rate values of fluids in each production layer in the production wellbore are measured using a turbine flowmeter. When measuring flow in the production wellbore using a turbine flowmeter, it is placed at the center of the wellbore fluid due to supporting equipment. The flow value measured by the turbine flowmeter is the flow value at the center of the wellbore. during the measurement process, when the turbine flowmeter is centered, it reflects the velocity Va of the fluid in the middle of the casing wellbore. In order to accurately obtain the cross-sectional flow rate value of the wellbore, it is necessary to measure the velocity value Vm of the fluid in the cross-section of the casing wellbore. At this point, dividing Vm by Va is denoted as Cv. The traditional method takes Cv as a constant value of 0.83. By studying the fluid velocity value in ultra deep production logging, it was found that the value Cv is not a constant value of 0.83. This value is closely related to the wellbore inner diameter, the ratio of turbine blade diameter to wellbore inner diameter, fluid density value, fluid viscosity value, and average fluid velocity value. This article designs an iterative optimization calculation method to calculate the Cv value. Comparing and analyzing the results of iterative optimization calculation with experimental values, it was found that the calculation accuracy of this method reached 97%. It can fully meet the requirements of calculating the fluid velocity value in the wellbore for production logging. © 2024 IEEE.

关键词： Oil well logging

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research on online inspection technology for wellhead equipment based on phased array ultrasonic testing 4

Research on online inspection technology for wellhead equipm...

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4th International Conference on Testing Technology and Automation Engineering, TTAE 2024

作者： Liu, Haohao Feng, Shaobo Zhao, Mifeng Wei, Junhui Wang, Pengcheng Zhou, Xuan Pan, Jianwu Zhang, Yushu Cao, Jia PetroChina Jianghan Machinery Research Institute Co. Ltd. Jingzhou434001 China Tarim Oilfield Company PetroChina Korla841000 China R&D Center for Ultra-Deep Complex Reservoir Exploration and Development CNPC Korla841000 China Engineering Research Center of Ultra-deep Complex Oil and Gas Reservoir Exploration and Development Xinjiang UygurAutonomous Region Korla841000 China

ISBN: (数字)9781510686656

ISBN: (纸本)9781510686649

For major oil fields under PetroChina, the wellhead equipment is usually abundant and diverse, selected based on the depth of the reservoirs and the extraction processes. during service, wellhead equipment is prone to erosion and corrosion, which can lead to safety risks such as leaks. Therefore, corrosion detection of high-risk wellhead equipment in service is crucial for ensuring the safe operation of these devices. Considering the operating conditions and structural characteristics of wellhead equipment, the applicability of various non-destructive testing methods was compared, and a defect detection scheme for wellhead equipment, primarily based on phased array ultrasonic testing(PAUT), was determined. Using PAUT technology, an online inspection was conducted on the wellhead equipment of 10 oil and gas wells in the Keshen block of Tarim Oilfield, which were prone to corrosion. It was found that in two of these wells, the passage and flange end surface of the production wing connection short section were both corroded, with the corrosion groove having a depth of approximately 5.0 mm and a width of approximately 50 mm. The on-site inspection results validated the feasibility of applying PAUT for online inspection of wellhead equipment. © 2024 SPIE.

关键词： ultrasonic testing

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