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检索条件"机构=CNPC Engineering and Technology R&D Company"

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Application of digital Twin for real-Time Early Identification and Warning of Pipe Stuck Using Hybrid Approach of Physics Model and Machine Learning

Application of Digital Twin for Real-Time Early Identificati...

引用

2023 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2023

作者： Zhang, Jiawei Huang, Hongchun Wang, Haige Wang, Qing Ji, Guodong Li, Hong CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9781959025078

Pipe Stuck is one of the predominant causes for drilling-related non-productive time (NPT). According to statistics, losses up to hundreds of millions of dollars are caused by pipe stuck globally each year. Early identification and warning of pipe stuck are essential for predicting and avoiding stuck issue once preventive measures are taken promptly. Typical detecting methods based on data fluctuation amplitude or curve trends subject to expert user experience and human error. Moreover, pipe stuck usually have already happened in most cases when noticed by these methods. This paper presents an innovative system combing physics model with machine learning method, which enables automatically pipe stuck risk monitoring and warning while drilling. The new system combines these approaches: 1)real-time calculation of hook load, torque and standpipe pressure(SPP) for 9 different drilling states (rotary drilling, slide drilling, reaming, back-reaming, tripping in, tripping out and etc.) based on drill string mechanics and wellbore hydraulics model;2)The calculated parameters are checked and calibrated automatically within set computing cycle to narrow down calculation error;3) The deviation of actual parameters from theoretical modeled value and rate of change(rOC) of actual parameters are calculated and compared on time-series, based on which a pipe stuck risk index (PSrI) is proposed ranging from 0% to 100%;4) With different risk index ranges, pipe stuck risk level is monitored and evaluated as low (green), medium(yellow) and high(red) on real-time basis. For historical wells with and without pipe stuck issues under different drilling states, thresholds for deviation and rOC of parameters corresponding to different risk levels are obtained by random forest algorithm (rFA). The system is designed to provide users, driller or monitoring specialist a warning signal with prompt window jumping out and constant beep sound whenever a high-risk is identified. Once detected, preve

关键词： Infill drilling

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development of Sealing Joint for Collecting Slip ring 13th

Development of Sealing Joint for Collecting Slip Ring

引用

13th International Field Exploration and development Conference, IFEdC 2023

作者： Qiao, Han Han, Fei Hu, Zhi-Jian Wang, Ai-Guo Cheng, Jin CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9789819702558

The cable from the collecting slip ring is connected with the cable from the coiled tubing drum union, and the power supply from the surface to the downhole electric drilling tool and signal transmission are delivered via the cable passing through the coiled tubing. The high-pressure sealing at the coiled tubing drum and the reliable suspension of the cable inside the coiled tubing are two key factors affecting the safe and reliable operations of the coiled tubing electric drilling tool system. Given this, the sealing joint for collecting slip rings is developed for the annulus sealing and cable suspension of the coiled tubing-through cable near the bottom diameter of the drum. The tool is mainly composed of the bayonet, bayonet seat, sealing packing, upper joint and lower joint. The testing of the pressure bearing and suspension capacities of the tool shows that the developed sealing joint meets the requirements of 70 MPa sealing pressure and 10 ton cable suspension weight. The tool delivers high-pressure reliable sealing via "manual + packing" operations, and moreover, it offers a high suspension capacity by tightly clamping the separated armor steel wires of the cable. The development of this tool is of great significance to the safe and reliable operations of the surface coiled tubing drum for the coiled tubing electric drilling tool. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Electric power systems

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A Novel Kick detection Tool Based on Knowledge-data-dual-driven Approaches

A Novel Kick Detection Tool Based on Knowledge-Data-Dual-Dri...

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2023 SPE Offshore Europe Conference and Exhibition, OE 2023

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

ISBN: (纸本)9781613999936

recognizing abnormal fluid influx is the first and most important step for well control safety. However, due to the complexity of the wellbore fluid mechanism, uncertainty of the formation pressure and noises in the real-time measurement data, it is difficult to detect kicks by conventional approaches. The purpose of this paper is to propose a knowledge-data hybrid approach and build a reliable and easy-to-use tool to automatically detect kicks. Based on the knowledge of the kick main indicators, this work utilizes Long-Short moving window average algorithm combining advanced filtration technology to capture subtle change trends precisely and timely in noisy real-time measured surface data during drilling. Self-adaptive kick threshold value adopting approaches are proposed to improve the accuracy of kick detection for different data measuring technologies. The knowledge and inference logic of specific drilling operations and phenomena, such as wellbore ballooning effects and drilling fluid poring, are embedded in the data analysis technologies to reduce the false alarms of the kick detection system. A reliable and practical intelligent kick detection tool is built based on this knowledge-data-dual-driven method. The must-have input set of this tool only contains 8 channels, including pit volumes, outlet flowrate, stand pipe pressure, and etc, which makes the tool flexible and widely applicable. The tool consumes both real-time and archived drilling data, and provide audible and easy-to-understand visual alarms when kick is detected. Moreover, the tool supports different outlet flowrate measurement technologies, including Paddle meter, radar meter and Coriolis meter. Extensive testing process using historical data manifests that the kick detection rate is 100% (correctly detected 16 kicks out of total 16 kicks), and the overall detection time is 6.1 mins earlier comparing to that of conventional methods. The tool was also deployed in a real-time operation center for

关键词： Infill drilling

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research of drilling and completion technologies for heavy oil in Venezuela and offshore presalt hydrocarbons in Brazil

Research of drilling and completion technologies for heavy o...

引用

SPE Middle East Oil and Gas Show and Conference 2019, MEOS 2019

作者： Fang, Zhimeng Wang, Xi Fu, Jin Zhang, Shunyuan Chen, Chen Research Institute of Petroleum Exploration & Development CNPC Engineering Technology R&D Company Ltd. China CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781613996393

Located in south of Eastern Venezuela Basin, Orinoco Oilfield is an onshore heavy oil field in South America. The heavy oil is known for its high content of acids, heavy metals and asphaltenes with a viscosity of 1000-10000mPa·s. According to the reserve report released by PdVSA by the end of 2016, JUNIN Block that is situated in east of Orinoco Oilfield has an OOIP of 178*108bbl. data of drilled wells and distances between offset horizontal intervals in Orinoco were both studied to improve ultimate production rates. 3-dimension borehole trajectories were designed and the most effective anti-collision measures were taken. After optimziation 8-12 horizontal wells are distributed on one pad. As the horizontal interval extends, the stable production time is prolonged and the accumulative production per well improves. However, the recovery rate stops increasing when the horizontal interval is over 1600m in JUNIN Block. Economically a large space between offset horizontal intervals results in fewer wells and lower costs, but a smaller space contributes to a higher production efficiency per well. If the space exceeds 600m, the accumulative production rate increases much more slightly. A three-dimension well trajectory consists of a vertical interval, an angle building interval, an angle holding interval, an angle building & direction changing interval, a direction turning interval as well as an absolute horizontal interval. Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin after Campos Basin, where there are 9 oil fields ranking among the top 20 offshore oil fields in terms of OOIP. By June 2017 over 160×104bbl oil and gas were produced per day in deep water of Santos Basin, taking up 57.1% of the total yield of Cam

关键词： Lime

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Current Status and Trends in Shale Oil and Gas drilling engineering technology development at Home and Abroad

Current Status and Trends in Shale Oil and Gas Drilling Engi...

引用

International Petroleum and Petrochemical technology Conference 2024, IPPTC 2024

作者： Jing, Yu Bo, Zhou Pingliang, Fang Bing, Li Wenchao, Sun Long, Chang CNPC Engineering Technology R&D Company Limited Beijing China

Shale oil and gas is an important component of unconventional oil and gas, and the United States has achieved energy independence through the shale revolution. China has abundant unconventional oil and gas resources, and the vigorous development of shale oil and gas is a necessary path for the development of China's oil and gas industry. By systematically analyzing the developmental characteristics of shale oil and gas major countries, represented by North America, this study compares domestic and foreign shale oil and gas drilling engineering technologies from the perspectives of development process, well construction cycle, drilling parameters, and other aspects. It clarifies the advantages and challenges of Chinese shale oil and gas drilling engineering technology and provides targeted recommendations. The drilling mode for shale oil and gas in China has progressed from single horizontal wells to large-scale platform factory operations, significantly reducing costs and increasing efficiency. However, due to the complex geological conditions of shale formations and poor surface environment, China's shale oil and gas wells have a horizontal section length about 1000 meters shorter than those in North America, and the well construction cycle is 2-3 times longer. There are still certain gaps in drilling efficiency and operating costs compared to foreign countries. By systematically analyzing the development process and parameter characteristics of shale oil and gas drilling engineering technology at home and abroad, this study clarifies the current status of drilling engineering technology, providing references for the integration and promotion of mature technologies, demonstration of key core technology breakthroughs, and exploration of cutting-edge technology research and development. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Gas industry

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recommendation of rigless Solution to Ensure Wellbore Integrity and develop Low-Perm reservoirs in Middle East: Maximize Vitality of Coiled Tubing in Staged Fracturing, Water Injection and Fluid Monitoring

Recommendation of Rigless Solution to Ensure Wellbore Integr...

引用

2024 SPE Conference at Oman Petroleum and Energy Show, OPES 2024

作者： Chen, Chen Bai, Haoli Liu, Shanshan Zhao, Shufen Liu, Bingshan Che, Yang Liu, Huifeng CNPC Engineering Technology R&D Company Ltd. China CNPC R&D DIFC Company Ltd. United Arab Emirates

ISBN: (纸本)9781959025252

Low-perm carbonate reservoirs in the Middle East have great potential for development. Hydraulic fracturing is one of the key technologies to unlock their commercial potential. In recent years, an increasing number of oil companies have placed emphasis on the development of low-permeability reservoirs. The Sadi reservoir in Halfaya oilfield (Iraq) is characterized as a medium-porosity, extremely low to ultra-low-permeability limestone reservoir. due to poor reservoir properties, it has remained largely untapped. drawing from mature experiences in developing similar reservoirs globally, the application of multi-stage hydraulic fracturing techniques in horizontal wells, exemplified by the S5H1 well, has been initiated as a pilot test. AdNOC, a decade ago, commenced the development of the Arab d tight oil reservoir. The original acid stimulation plan was modified to a fishbone fracturing completion scheme. This adjustment not only resulted in significant cost savings per well, but also achieved an initial production rate of over 2100 barrels per day, more than triple that of the original plan. The production continues to be stable at present. Besides, AdNOC has been focusing on development of low-permeability (dY Zone A), using MrC (maximum reservoir contact) and compatible reservoir stimulation technologies. In Oman's daleel oilfield, the average thickness of the oil reservoir ranges from 10 to 30 meters, constituting a thin-layered, low-permeability carbonate reservoir. Maintaining the integrity of the wellbore is a critical consideration in the development of low-permeability reservoirs. Poor wellbore integrity can lead to complications in the production stage, resulting in an increasing quantity of inactive strings. To mitigate potential risks, the two-barrier philosophy serves as a guiding principle. This approach mandates the implementation of two independent and tested barriers to prevent issues related to well control during production operations and interventi

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research on the Step drilling System for Water Jet radial drilling 13th

Research on the Step Drilling System for Water Jet Radial Dr...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Chen, Zhi ren, Bin Lv, Wei-Ping Zhang, Yan Zhou, Shi-Jie Zhu, Ye CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9789819702558

The low traction force of the front-end nozzle for water jet radial drilling limits the drilling distance. The ground run drilling method has complex force transmission, large run-in-hole fluctuation, and has difficulty in the ground precise control of downhole drilling speed. In view of this, a step drilling system for water jet radial drilling is studied. The system realizes the low-speed drilling of the nozzle through the low-speed drilling controller, and ensures the continuous drilling of the nozzle through the step anchor feeding mechanism. The step anchor feeding mechanism has a feeding distance of 2 m each time, and the drilling distance of the nozzle is equal to the feeding distance multiplied by the feeding times. Increasing the feeding times can achieve long-distance drilling. After the drilling is completed, reduce the system pressure, and the step anchor mechanism releases the anchor. Then use a coiled tubing to lift the tool out of the wellbore. When jet drilling, the pushing speed (v1) of the nozzle is consistent with the rock breaking speed (v2) of the jet, and the rock breaking effect is good. If v1 > v2, it will cause the nozzle to collide with the end of the hole, causing the jet hose to bend and block in the hole, ultimately preventing long-distance drilling;If v1 © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： rocks

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Efficient drilling technology of Horizontal Wells in the duverney Block in Canada

Efficient Drilling Technology of Horizontal Wells in the Duv...

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2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Han, Haochen Yang, Guobin Zhang, Guobin Chen, Jia Chen, Peter Fu, Jin Wang, Siqi CNPC Engineering and Technology R&D Company CNPC Materials Procurement Center CNPC GreatWall Drilling Company Ltd.

ISBN: (纸本)9781613998342

recent years, both exploration and development have made considerable progress in the duverney block shale gas in Canada. However, technical problems exposed in horizontal drilling engineering need to be optimized: 1) Loss is common in shallow formations;2) High downhole friction torque, low rOP and drilling cuttings accumulation in long horizontal well section;3) Borehole instability leads to hanger or packer failure;4) drill bits and PdM have short servicing life and low efficiency. Optimization comes from three aspects: (1) Based on previous drilling experience and latest formation condition and development requirement, we design a new well profile for the block taking into drilling safety and further development account;(2) Optimize strong inhibitive, easy-maintenance and high cutting-carrying capacity OBM to ensure the safety requirements in the ultra-long open hole section;(3) BHA and parameters optimization. Optimize drill bit with high-abrasiveness and axial efficiency according to logging data, drillability and UCS. Upgrade conventional PdM into high-performance PdM with even-wall thickness. By means of simulation and calculation, drilling parameters suitable for duverney block has been optimized. Based on the optimization above, a stable and efficient well profile has been improved solving hanger failure on-site efficiently and complete with composite casing design (4-1/2 inch plus 5 inch) in reservoir section;a 90/10 oil-water ratio OBM has been optimized and applied onsite;Combined with high performance PdC bit and even-wall PdM as well as optimized drilling parameters, higher rOP and longer horizontal section have been achieved. The optimization has made successful field application results:(1) Completion depth has been deepened gradually, from 18,080 ft in 2013 to 23,208 ft at present, with an increase of 28.3%;(2) Horizontal section length has been increasing dramatically, from 6,190 ft in 2013 to 10,301 ft at present, with an increase of 66.4%;(3) Th

关键词： Horizontal wells

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Application of direct Torque Control (dTC) in the drilling System of Electric drilling Tool 13th

Application of Direct Torque Control (DTC) in the Drilling S...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Wang, Ai-Guo Han, Fei Wang, Hong-Wei Qiao, Han CNPC Engineering Technology R&D Company Limited Beijing China

ISBN: (纸本)9789819702558

drilling system with electric drilling tool is one of key drilling technologies for the development of electric-driven drilling in the days to come, but the characteristics of rock cutting by downhole electric motor driving bit is significantly different from that of rock cutting by conventional rotary table and TdS driving drilling string to rotate the bit. downhole electric motor is highly effective with flexible control, which is incomparable for rotary table and TdS. However, due to the limit of downhole space size, downhole electric motor fails to reach the reserve of torque for rotary table and TdS;At the same time, the characteristics of rock cutting by bit is alternating load with high frequency and is greatly affected by the factors of the outside, such as WOB, rPM, and characteristics of rock cutting in the formation, which will make the situation worse for downhole electric motor with inadequate reserve of power;Thus it leads to the failure of realizing the running of bit at stable speed. So, to adapt to the characteristics of high frequency alternating load for the bit, control system of downhole electric motor is required to be provided with better performance of dynamic response. Based on the change of load characteristics, output torque of electric motor is timely adjusted to achieve the steady control of motor revolution speed. On the one hand, efficiency of rock cutting is improved, on the other hand, use life of bit is extended. This paper, through the comparison test of pilot performance for currently existing and more mature frequency converter of vector control mode without position, primarily verifies the mode of direct torque control (dTC) and control of permanent magnet synchronous motor by long-distance vector without position (1800 m) is achieved. Compared with conventional V/F ratio open-loop control mode, the higher performance of dynamic response is attained. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Torque

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Maximising drilling rates with real-Time data-driven drilling Parameters Optimisation

Maximising Drilling Rates with Real-Time Data-Driven Drillin...

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2023 International Petroleum technology Conference, IPTC 2023

作者： Cui, Meng Ai, Xin Li, Jijun Liu, Wenpeng ding, Yan CNPC Engineering Technology R&D Company Limited China CNPC Daqing Exploratory & Drilling Engineering Company China

ISBN: (纸本)9781613998663

The hardness and high abrasiveness of shale formations pose great challenges for improving drilling performance with deeper and more complex unconventional gas-reservoir formations explored and developed in the Sichuan Basin of China. The work discussed a workflow of data-driven drilling-parameter optimization based on machine learning. The algorithm was used to construct the correlation among drilling parameters, lithology change, vibration, bit wear, and hole cleaning, dynamically optimize rock-breaking efficiency, and integrate with the rig control system. The data-driven drilling optimization workflow consisted of exploration mode, learning mode, and application mode. The exploration phase trained a linear model at a certain frequency during data collection and updates the increasing trend of rate of penetration (rOP) in real time after starting the workflow. Based on the trend, the direction for further exploration was given. The system entered the learning mode after sufficient exploration to learn the exact functional relationship between rOP/MSE (mechanical specific energy) and operation parameters in the current explored data queue. Current optimal operation parameters were presented based on the function relationship. Then the workflow entered the application mode, maintained the current optimal operating parameters, and kept the efficient rock-breaking state. The workflow constantly monitored the micro-interval rOP and bit energy output in the application mode. When drilling performance was under expectation, the workflow automatically evaluated new conditions (e.g., formation change, Bottom hole assembly (BHA) vibration, and cuttings bed) and switched to the learning mode or exploration mode to adapt to changes in the current drilling state. The algorithm has been integrated with the rig control system, and the field test was carried out in well Ning 209H71-3, a shale-gas horizontal well in the Sichuan Basin. The test showed that the random forest and su

关键词： Lithology

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