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13th International Field Exploration and development Conference, IFEdC 2023

作者： Jing, Ling-Zhi Cui, Meng Yang, Xin-Yi Tian, Yu-Meng Shi, Xiao-Yan CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9789819702718

drilling and completion is the core of energy production and plays an irreplaceable role in improving oil and gas exploration and development and increasing crude oil recovery. Similarly, drilling data is of great significance in drilling optimization, perforation, hydraulic fracturing, and oil and gas production. However, in actual production, data quality and application often fall short, making it difficult to further enhance and optimize oilfield engineering technology. Therefore, effective data governance to address data quality and application problems has become an urgent and critical issue. Additionally, the scale, quality, complexity, and security of data are essential issues that must be considered in data governance processes. To address these issues, this paper proposes an engineering technology data governance approach covering data quality control, data standardization, data modeling, and data mining. These methods and tools have been applied in production practices, and have achieved good results. Additionally, this paper explores the application of intelligent data governance, which aims to quickly and efficiently manage data. This paper compares the advantages and disadvantages of existing data governance algorithms in data governance, providing reference application scenarios for more efficient, reliable, and accurate drilling data governance. In summary, the proposed data governance approach and techniques provide the foundation for further improvements in oilfield engineering technology and management, as well as enhancing data utilization and decision-making for the petroleum service industry. Effective methods and tools must be used to address the challenges of data governance, including data scale, quality, complexity, and security. The proposed data governance approach for engineering technology, along with its applications and exploration in intelligent data governance, provides significant support for the exploration and implementation of d

关键词： Quality control

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Experimental Study on the Transmission Law of Ultrasonic in Mud 1

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Zhang, Shuo Gao, Wen-Kai Teng, Xin-Miao ding, Hua-Hua Liu, Ke Yu, de-Zhou CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (数字)9789819704798

ISBN: (纸本)9789819704781

In the process of oil and gas exploitation, the problems of wellbore instability and collapse seriously restrict the efficiency and safety of drilling and completion engineering. Ultrasonic borehole imaging technology while drilling has the advantages of accurately reflecting borehole shape, identifying fractures, pores, bedding and other characteristics. It can be used for real-time monitoring and evaluation of borehole engineering conditions and quality while drilling, which can effectively reduce drilling risks and costs, improve drilling efficiency and reservoir drilling rate. In order to develop ultrasonic borehole imaging tools while drilling and accurately interpret the ultrasonic images, this paper researches the transmission law of ultrasonic in mud, builds and designs the experimental device and experimental platform, formulate the experimental scheme. Laboratory simulation experiments were carried out to analyze the effects of different measurement distances, different mud density, different temperatures and different objects on the travel time and echo amplitude of ultrasonic and the main factors affecting the imaging effect. The experimental results show that: (1)The ultrasonic travel time increases linearly with the increase of measurement distance, increases with the increase of mud density, and increases slightly with the increase of transmission medium (water) temperature;(2) The ultrasonic echo amplitude decreases exponentially with the in-crease of measurement distance, decreases exponentially with the increase of mud density, and increases slightly with the increase of trans-mission medium (water) temperature;(3) Ultrasonic travel time information can be used for well diameter measurement and wellbore shape identification;(4) The ultrasonic echo amplitude information can be used to identify and image the characteristics of wall cracks, pores and holes;(5) Ultrasonic can be applied to the measurement and imaging of high density oil/water-based mud

关键词： Boreholes

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Early Stuck Pipe detection Based on Time Series Analysis

Early Stuck Pipe Detection Based on Time Series Analysis

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2024 SPE Asia Pacific Oil and Gas Conference and Exhibition, APOGCE 2024

作者： Shi, Xiaoyan Ji, Yong Cui, Meng Wu, dong Guo, Weihong Jing, Lingzhi Tian, Yumeng Yang, Xinyi CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9781959025269

recognizing stuck pipe signs in an earlier time and adopting appropriate action can greatly reduce nonproductive time during drilling and improve drilling safety. The purpose of this paper is to propose a time series analysis approach and build a reliable and easy-to-use tool to automatically detect stuck pipe accurately and early. Based on the in-depth theoretical analysis and historical stuck pipe data analysis, main early stuck pipe indicators during different drill operations are identified. More than ten time series analysis algorithms and machine learning algorithms are utilized to capture subtle change trends and local change patterns in noisy real-time measured surface data during drilling, and a self-adaptive threshold value determination method is proposed to improve the detection accuracy under different data measurement quality. Moreover, correlation analyses are conducted on the multidimensional time series based on the studied rules and priori knowledge to reduce the false alarms caused by curtain drilling operations. An early stuck pipe detection software tool is built. The tool consumes both real-time and archived drilling data, and provides alarms when stuck pipe indicators are detected. 19 wells’ historical drill data are fed to the tool for algorithm verification, the results show that the tool can automatically detect all 22 stuck pipe incidents in the data set, among which, 5 incidents were detected 2 hours before the field recorded event time, 2 incidents were detected more than 1 hour before the field recorded time, 8 incidents were detected 3-42 minutes before, 4 incidents were detected about the same time as the field recorded time, and 3 incidents were detected less than 2 minutes later than the field recorded time. The average false alarm rate is about once per 48 hours operation time. The tool was also connected to the real-time drilling data in remote drilling operation support center. during the trail, two early stuck pipe signs are cap

关键词： drills

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development Analysis and Prospect of Continuous Circulation drilling technology 13th

Development Analysis and Prospect of Continuous Circulation ...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Hu, Zhi-Jian Li, Xing-Yue Shao, Qiang Cheng, Jin CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9789819702558

Continuous circulation drilling technology has been widely applied abroad and has become an effective means to solve the safety of drilling in complex formations. However, due to insufficient understanding, there is still a significant gap in product development and application level between China and foreign countries. In order to improve understanding, the paper first systematically reviews the development history and current situation of continuous circulation drilling technology and products in domestic and foreign, and then through typical application cases, the main application fields and advantages of the current continuous cycle drilling technology are analyzed and summarized, as well as the applicability, compatibility, safety and reliability of different products. The application practice show that it can play an important role in the narrow density window wells, HTHP wells, Erd wells, horizontal wells and gas/foam drilling wells, and significantly improve the drilling safety and success rate. In view of the development requirements of domestic oil and gas resources, the development plan of applying continuous circulation drilling technology to potential fields such as ultra-deep carbonate reservoir and unconventional shale gas is proposed, and according to the characteristics of two different systems, the optimal schemes are selected and the corresponding development objectives are formulated, which will provide useful reference for promoting the further development of continuous circulation drilling technology. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Horizontal wells

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Effect of Montmorillonite on the Properties of Organic-Inorganic Composite Cross-Linked Polyacrylamide Gel System 13th

Effect of Montmorillonite on the Properties of Organic-Inorg...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Zhang, Shi-Ling Qiao, Yan Ning, Kun Zhang, Yang Shang, Li-Tao Wang, Yan Hou, Teng-Fei Bai, Hao-Li CNPC Engineering Technology R and D Company Limited Beijing China Tarim Oilfield Company of CNPC Xinjiang China

ISBN: (纸本)9789819702633

The organic-inorganic composite cross-linking technology can effectively improve the temperature resistance of polyacrylamide gel systems. However, the effect of adding montmorillonite to the system and its impact on performance has not been studied. By using visual code method, differential scanning calorimetry (dSC), and other methods, the effects of montmorillonite on the temperature resistance, gelation properties, and microstructure of the organic-inorganic composite cross-linking polyacrylamide gel system were investigated. The microstructure of the gel system was analyzed by infrared spectroscopy and scanning electron microscopy (SEM). The results showed that the organic-inorganic composite cross-linking gel with different mass fractions of montmorillonite can effectively form a gel, which covers the three-dimensional network structure and does not damage the original spherical-tree structure. By changing the dosage of montmorillonite, it is found that the strength of the gel system is not only related to the density of the three-dimensional network structure, but also related to the composition of the network structure. The gelation time is approximately 21.0–22.0 h, with strength ranging from H to F level. The gel does not break down after high-temperature aging at 140 ℃ for 120 days, indicating good long-term thermal stability. The peak temperature of the differential scanning calorimetry increases with the increase of montmorillonite mass fraction. When the montmorillonite mass fraction is 2.5%, the peak temperature can reach 181 ℃. Adding montmorillonite can improve the performance of the organic-inorganic composite cross-linking polyacrylamide gel system, and can be used to prepare medium-strength gel systems for high-temperature oil and gas field profile control and water shut-off to further enhance the recovery rate. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Clay minerals

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An Artificial Intelligence Algorithm for the real-Time Early detection of Sticking Phenomena in Horizontal Shale Gas Wells

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Fluid dynamics & Materials Processing 2023年第10期19卷 2569-2578页

作者： Qing Wang Haige Wang Hongchun Huang Lubin Zhuo Guodong Ji CNPC Engineering Technology R&D Company Limited Planning and Support InstituteBeijing102206China

Sticking is the most serious cause of failure in complex drilling *** the present work a novel“early warning”method based on an artiﬁcial intelligence algorithm is proposed to overcome some of the known pro-blems associated with existing sticking-identiﬁcation *** method is tested against a practical case study(Southern Sichuan shale gas drilling operations).It is shown that the twelve sets of sticking fault diagnostic results obtained from a simulation are all consistent with the actual downhole state;furthermore,the results from four groups of veriﬁcation samples are also consistent with the actual downhole *** shows that the pro-posed training-based model can effectively be applied to practical situations.

关键词： Shale gas drilling sticking fault artificial intelligence risk early warning technology

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Prediction of Horizontal and Vertical distribution Trend of Formation Pressure and Characteristics of Safety density Window in Yinggehai Basin 29th

Prediction of Horizontal and Vertical Distribution Trend of ...

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29th International Conference on Computational and Experimental engineering and Sciences, ICCES 2023

作者： Gao, reyu Cui, Yi Fan, Jinzhao Yang, Guang Yang, Hongwei CNPC Engineering Technology R&D Company Limited Beijing102206 China

ISBN: (纸本)9783031429866

The formation pressure system of Yinggehai Basin has the characteristics of poor horizontal distribution regularity and severe vertical distribution changes. This paper proposes a new method for predicting the horizontal and vertical distribution trend of formation pressure for the situation of limited offshore drilling data. The method is based on the topological triangulation algorithm, combined with the data set to fit the multivariate interpolation function, and conveniently realizes the prediction and visualization of the three-dimensional horizontal and vertical distribution trend of regional formation pressure. On this basis, through the analysis of the relevant data of the complex accident points that have been drilled, the characteristics of the single well safety density window and the regional safety density window are clarified. The study found that there is no high pressure in the shallow layer of the block, and the formation pressure spreads smoothly in the lateral direction;the high pressure top surface is at 3500 m, and the formation pressure gradually increases with the increase in longitude and decrease in latitude in the lateral direction. The formation pressure rises extremely rapidly with the increase of depth in the longitudinal direction, which has the characteristic of "broken line pressurization". The safety density window of single well is in the shape of funnel with the characteristic of turning back, and the turning section is between 3500 and 4000 m. The safety density window feature of the block can be divided into three stages according to the depth, and the window appears extremely narrow after 3500 m (3). © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Forecasting

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Collision Mechanism of Marine drilling riser and Internal String in deep-water drilling 34th

Collision Mechanism of Marine Drilling Riser and Internal St...

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34th International Ocean and Polar engineering Conference, ISOPE 2024

作者： Zhang, Minghe Cui, Longlian Wang, Haige Yang, Jin Yang, Guobin Zhang, Guobin Liu, Qi Kong, Lulin Sun, Ke Jia, Wanting CNPC Engineering Technology R&D Company Limited China Beijing China

ISBN: (纸本)9781880653784

due to the complex marine environment loads, large horizontal deflection of marine risers, and contact and collision between risers and internal pipe strings will occur during drilling string installation and drilling process, resulting in drilling string wear and deformation, which brings great challenges to deep-water drilling. Based on the pipe-in-pipe model, the static analysis model of the whole process of contact and collision between riser and internal drilling string is established, and the contact modes of riser and internal drilling string are classified. The sensitivity analysis of key mechanical parameters, such as water depth, platform offset, environmental loads, and riser top tension was also carried out. The numerical simulation method is used to show the contact and collision between risers and internal pipe strings, and the control method for risers and internal string collision under different water depth conditions is proposed. © 2024 by the International Society of Offshore and Polar Engineers (ISOPE).

关键词： Marine risers

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AdLM-LWd: Adaptive deep Learning Model for Lithology Identification from Logging- While-drilling data with Online Learning Mechanism

ADLM-LWD: Adaptive Deep Learning Model for Lithology Identif...

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2024 International Conference on New Trends in Computational Intelligence, NTCI 2024

作者： Zhao, Ziyun Lin, Wang Jing, Lingzhi Tian, Yumeng Guo, Weihong CNPC Engineering and Technology R&D Company Limited Beijing102206 China

ISBN: (纸本)9798331517021

Accurate lithology identification from Logging-While-drilling (LWd) data is crucial for optimizing drilling operations and enhancing reservoir characterization in the oil and gas industry. However, the lack of standardized datasets and the need for real-time adaptability in varying geological environments pose significant challenges. This study addresses these issues through three key contributions. First, a comprehensive dataset for lithology identification is constructed, combining LWd features with corresponding lithology labels, providing a valuable resource for deep learning applications in this field. Second, a novel deep learning model is proposed, integrating 2d convolution and bidirectional LSTM to effectively capture both spatial and temporal features of LWd data. The model demonstrates high stability and performance across various metrics in extensive cross-validation tests. Lastly, an Adaptive Incremental Learning Algorithm (AILA) is introduced, incorporating online learning mechanisms and dynamic adaptation strategies to enhance the model's real-time adaptability. These advancements contribute to more accurate and adaptive lithology identification systems, which potentially improve real-time decision-making in drilling operations and lead to more efficient and cost-effective exploration and production processes. © 2024 IEEE.

关键词： Gas industry

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Application of Integrated directional and Guide drilling technology in deep Coalbed Methane 7

Application of Integrated Directional and Guide Drilling Tec...

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7th International Conference on downhole Measurement and Control, ICdMC 2024

作者： Zhu, Weixing Wang, Zhuang Wu, dong Lin, Wang Wang, Yaxuan Huang, Kai He, Jiayu Xue, Hongzhi CNPC Engineering Technology R&D Company Limited Beijing102206 China

deep coalbed methane is characterized by deep burial, complex and diverse microstructures, significant lateral variations in reservoirs, and the development of internal interlayers. Current seismic exploration methods suffer from severe high-frequency signal attenuation in coal layers, resulting in low seismic resolution, which severely limits the precision of geological models for coalbed methane and the encounter rate of reservoirs in horizontal wells. Based on this, this paper introduces an integrated directional and guide drilling technology and applies it to horizontal well operation, achieving excellent results. Firstly, in the pre-drilling phase, we utilize well-seismic integrated reservoir and structural prediction techniques to meticulously characterize coal seam distribution patterns and subtle geological structures. This enables the construction of a geo-steering model specifically for horizontal wells, optimizing the locations of target points, designing well trajectories, and selecting the optimal configuration of geological steering tools. Secondly, in the drilling operation stage, this system iteratively refines the depth-domain seismic section based on real-time measure while drilling (for short MWd). This process reconstructs the geological steering model, precisely predicts the position of coal seams at the bottom of the well, continuously optimizes the well trajectory design in real-time, and ultimately generates geo-steering instructions. Finally, after the completion of drilling operations, the system evaluates the coal seam area and iteratively refines the three-dimensional geological model. This process provides technical support for the deployment of the next well and the design of the target trajectory. After verification through multiple horizontal wells targeting deep coalbed methane, the guiding model reconstructed by this technology has achieved a fitting rate of over 95%, significantly enhancing the reservoir encounter rate to above 90%

关键词： Horizontal wells

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