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Pore Pressure Prediction in deep Complex Formations Based on Well-Seismic Combination 58

Pore Pressure Prediction in Deep Complex Formations Based on...

引用

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

作者： Zixuan, Yang Chenxi, Ye Qian, Wang Wenbao, Zhai Peng, Tan Zhaowei, Chen CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China

ISBN: (纸本)9798331305086

With the development of oil and gas drilling technology, oil and gas exploration and development have moved towards deep to ultra-deep layers. due to its deep burial depth, deep formations face various challenges such as high temperature, high pressure, and high stress. The prediction of formation pore pressure is a core factor of drilling design optimization and risk prevention. In order to improve the prediction accuracy on the basis of existing pre-drilling formation pore pressure prediction methods, the logging data and actual drilling data of the drilled wells were combined with the seismic data. In this paper, a set of high accuracy pore pressure prediction method based on well-seismic combination are formed by using the interval-controlled interval velocity modeling method and the well-controlled interval velocity correction method. The method is applied to a deep well in Tarim Basin. This well was designed to exceed a depth of 8,000 meters. The predicted pore pressure coefficient of the well is between 1.04 and 1.22 g/cm3. The measured pore pressure coefficient after drilling was between 1.07 and 1.22 g/cm3. Actual analysis has demonstrated the accuracy and reliability of pore pressure prediction, providing support for pre-drilling pressure forecasts. Copyright 2024 ArMA, American rock Mechanics Association.

关键词： Pore pressure

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research Progress on Leak Prevention and Plugging technology in deepwater drilling

Research Progress on Leak Prevention and Plugging Technology...

引用

International Petroleum and Petrochemical technology Conference 2024, IPPTC 2024

作者： Liu, Jianquan Kou, Xiaobo Liang, Xu Gao, Xiang Ye, Zhilin Jin, Yi CNPC Engineering Technology R&D Company Limited China Institute for Hygiene of Ordnance Industry China Tuha Downhole Service Company XIBU Drilling Engineering Company Limited China

With the continuous development of global oil and gas resources, onshore and shallow water crude oil production is no longer sufficient to meet the demand. Therefore, deepwater oil and gas exploration and development have attracted high attention from various countries. China's oceans are vast and rich in offshore oil resources, especially in the South China Sea, where oil and natural gas reserves are enormous. In recent years, it has become a key focus of national offshore oil exploration and development. The increasing complexity of deep-sea well leakage in the ocean and the increasing difficulty of management have brought great challenges to drilling construction and also caused significant economic losses. Therefore, the research on leak prevention and plugging technology for deep water in the ocean has become particularly important. This article investigates the current research status of deep water leakage prevention and plugging technology both domestically and internationally, discusses the main problems that exist in the development and drilling process of deep water oil and gas fields, analyzes the reasons for well leakage, and proposes corresponding solutions. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Oil field development

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dynamic response Mechanism of Borehole Breathing in Fractured Formation 30th

Dynamic Response Mechanism of Borehole Breathing in Fracture...

引用

30th International Conference on Computational and Experimental engineering and Sciences, ICCES 2024

作者： Gao, reyu Cui, Yi Wang, Ge Zhao, Fei ding, Yan CNPC Engineering Technology R&D Company Limited Building 1-Courtyard 5-Huanghe Street-Changping District Beijing102200 China

ISBN: (纸本)9783031829062

The ongoing advancement in the exploration and development of oil and gas resources has shifted focus towards deep and ultra-deep layers, emerging as the primary arena for oil and gas exploration and development in China. The intricate fractured reservoir environment, characterized by a narrow safe density window and borehole breathing during drilling, presents substantial challenges to ensuring safe and efficient drilling operations in deep reservoirs. Borehole breathing-induced return of drilling fluid can be easily misinterpreted as a well kick, leading to the implementation of erroneous well control measures that significantly impact the safety and efficiency of deep drilling. To gain a more comprehensive understanding of the dynamic response mechanism associated with borehole breathing in fractured reservoirs, as well as to elucidate alterations in fluid and rock behavior during this process, this study has developed an innovative model for simulating borehole breathing within fractured reservoirs. This model is grounded on the permeability and fluid flow principles governing non-Newtonian fluids, employing dual porous medium stress coupled with flow methodologies to effectively simulate and quantify both the loss and return of drilling fluid within the borehole during instances of borehole breathing within deep fractured reservoirs, along with changes occurring within fractures. The model underwent validation through the utilization of field data and case studies. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Non Newtonian flow

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A new drill bit selection method based on machine learning and intelligent optimization process 57

A new drill bit selection method based on machine learning a...

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57th US rock Mechanics/Geomechanics Symposium

作者： Liu, Z.H. Song, X.Z. Ye, S.L. Yin, Z.Y. Ji, Y. Zhang, C.K. Ma, B.d. Zhu, Z.P. Han, L. Beijing102249 China CNPC Engineering Technology R&D Company Limited Beijing102206 China

ISBN: (纸本)9780979497582

In the process of oil and gas drilling, the drill bit is the direct tool to break rock. The selection of drill bit needs to consider formation factors, drilling construction factors, field size requirements and other factors. At present, the optimization methods mainly include mechanical analysis, cost analysis, neural network method and other methods, but there are some limitations. In this paper, three categories and more than ten kinds of input parameters are selected, and the rate of penetration is predicted by BP neural network algorithm. Then, the bit library is established according to the actual bit used in the field, and the parameters of the bit are optimized by intelligent optimization process, and the actual demand is taken as the constraint to select the most suitable one. The error of the rOP prediction model was within 10%, and the rOP was increased by 11.67% on average with the optimized bit. In this paper, the rock breaking rule and complex mechanism of drill bit are stored in the model, and the drill bit optimization is carried out according to the actual requirements, which can provide a certain degree of support for the field drill bit. © 2023 57th US rock Mechanics/Geomechanics Symposium. All rights reserved.

关键词： Bits

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HYdrAULIC ANALYSIS OF dOWNHOLE OSCILLATING TOOL TUrBINE BASEd ON SLIdING GrId 29

HYDRAULIC ANALYSIS OF DOWNHOLE OSCILLATING TOOL TURBINE BASE...

引用

29th International Congress on Sound and Vibration, ICSV 2023

作者： Zejun, Hua Anxue, Jia Xiang, Miao Xianbo, Xue Haijun, Liu Botao, Zhou China Oilfield Services Limited China CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9788011034238

Turbine is a commonly used component in downhole tools, and its flow field characteristics have a significant impact on the performance of downhole tools. This article is based on fluid dynamics theory, using finite element method and sliding grid technology to analyze the flow field characteristics and torque characteristics of a single turbine group. Analysis shows that when the displacement is constant, the turbine torque remains almost constant. This study can provide a basis for turbine design. © 2023 Proceedings of the International Congress on Sound and Vibration. All rights reserved.

关键词： Finite element method

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research on System Efficiency Evaluation of dilute Pumping Unit Based on Clustering 12th

Research on System Efficiency Evaluation of Dilute Pumping U...

引用

12th International Field Exploration and development Conference, IFEdC 2022

作者： Li, Bing Zhou, Bo Yu, Jing He, Liu Tan, Chao-dong CNPC Engineering Technology R&D Company Limited Changping Beijing China Changping Beijing China

ISBN: (纸本)9789819919635

System efficiency is an important index to evaluate energy consumption and management level of pumping *** evaluation of system efficiency is of great significance for parameter adjustment and optimization decision. At present, the evaluation index of system efficiency of dilute pumping Wells in oilfield is single, and the influence of dilute is not considered, so it cannot point out the direction of system efficiency improvement. In this paper, the system efficiency calculation model of dilute pumping Wells is established, the system efficiency evaluation index set is established by analyzing the influencing factors of the system efficiency of dilute pumping Wells, and the system efficiency evaluation model suitable for dilute pumping Wells is established by using cluster analysis algorithm. Through the establishment of the evaluation method of doped rare of well pumping unit is analyzed, according to the results of the characteristics of the mixing thin oil well classified effect is good, the low efficiency of Wells are pumping unit balance to solve the problem of poor or motor power factor smaller downhole inefficientmixing thin oil well has a small stroke, at times, more big, the mixed liquid viscosity,mixing amount of dilute,mixed with characteristics of thin oil density is not reasonable, the results show that the model can quickly classify the efficiency of diluted oil well system and provide direction for the efficiency optimization of diluted oil well system. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Oil wells

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An Intelligent Prediction Method of Horizontal well rOP Based on di-GrU 57

An Intelligent Prediction Method of Horizontal well ROP Base...

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57th US rock Mechanics/Geomechanics Symposium

作者： Pan, Tao Song, Xianzhi Wang, Zheng Yin, Zhiyong Ji, Yong Zhu, Lin Pei, Zhijun Ye, Shanlin Liu, Muchen Li, Zhen Zhu, Zhaopeng Beijing102249 China CNPC Engineering Technology R&D Company Limited Beijing102206 China

ISBN: (纸本)9780979497582

At present, with the continuous development of unconventional oil and gas exploration and development, horizontal wells, as an important means of unconventional oil and gas exploitation, have attracted much attention from drilling teams and oil field companies. However, the cost of horizontal well drilling is relatively high, so more targeted construction should be carried out according to the characteristics of horizontal well drilling. Therefore, rate of penetration (rOP) prediction of horizontal wells is extremely important. The current rOP prediction models of horizontal wells mainly rely on manual experience and some mechanism models, and do not take field data and actual construction conditions into account, so the field application effect is difficult to be ideal. To solve this problem, an intelligent algorithm based rOP prediction model for horizontal Wells is proposed and a novel dual-input neural network structure is designed. Sequential data such as hook load and rotary torque are input into Gated recurrent unit' (GrU) network, and non-sequential data such as bit type are input into back-propagation neural network(BP), which is called dual Input GrU(di-GrU) rOP prediction model. The results show that mean absolute percentage error and r-squared of this model are 11.8% and 0.923 respectively. The prediction model based on di-GrU proposed in this paper has higher accuracy and better mobility, which is of guiding significance for improving the drilling efficiency of horizontal wells. © 2023 57th US rock Mechanics/Geomechanics Symposium. All rights reserved.

关键词： Horizontal wells

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Safe and Efficient drilling technology and Practice of High risk Gas reservoirs on the right Bank of the Amu darya rive 13th

Safe and Efficient Drilling Technology and Practice of High ...

引用

13th International Field Exploration and development Conference, IFEdC 2023

作者： Ye, dong-Qing Wang, Gang Guo, Qi-Jun Zhong, Zhao Zhou, Tuo Li, Gan-Lu Liu, Yu-Han Liu, Chen-Chao CNPC Engingeering Technology R&D Company Limited Beijing102206 China AM River Natural Gas Company Beijing100034 China CNPC Bohai Drilling Engineering Company Limited Tianjin300452 China

ISBN: (纸本)9789819702558

The right bank of Amu darya gas field is an important oil and gas cooperation block of China ‘s overseas oil and gas business in the ‘ silk road economic belt ‘, due to the local shallow secondary high pressure gas reservoir and the target layer overlying thick salt gypsum layer, seriously affected the work area of safe and efficient drilling. Before the intervention of cnpc, 192 wells were drilled in this area, of which the engineering scrap rate was 23% and the geological scrap rate was 41%. In order to effectively solve the difficulties in the drilling operation on the right bank and improve the success rate of drilling, the drilling technology of shallow secondary high-pressure gas reservoirs and giant thick salt-gypsum gas reservoirs at home and abroad was investigated. Combined with the geological characteristics of the Amu darya gas field, the drilling engineering scheme was formulated, the advanced and complete drilling equipment was matched, and the field test and scheme optimization were carried out step by step. In view of the drilling risk caused by shallow secondary high-pressure gas reservoirs, the countermeasures of detecting the underground situation of slim hole wells, and then casing sealing after passing through dangerous formations according to the design expansion are adopted. In view of the difficulties in trajectory control of highly deviated wells in extremely thick salt-gypsum layers, the wellbore structure and wellbore trajectory design were optimized, and the directional drilling fluid for salt-gypsum layers was optimized. A series of trajectory control measures for salt-gypsum layers were proposed in combination with dynamic drilling tools and MWd technology. Finally, combined with the formation. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Trajectories

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research on Fault diagnosis System of Key drilling Equipment Based on Internet of Things 13th

Research on Fault Diagnosis System of Key Drilling Equipment...

引用

13th International Field Exploration and development Conference, IFEdC 2023

作者： Luo, Xue-Li Jin, Yi Yang, Xiao-Guang Jia, deng Su, Yong Zhang, Yi Wang, Yong-Chao Chen, Bing-deng Bai, Han-Qin CNPC Engineering Technology R&D Company Limited Beijing China Beijing Kembl Petroleum Technology Co. Ltd. Beijing China

ISBN: (纸本)9789819702718

As the important equipment in the oil drilling rig system, the operation status of drilling pump and winch directly affects the safety and efficiency of oilfield drilling production. The existing inspection and maintenance of drilling equipment mainly rely on manual patrol inspection and post-maintenance. The intelligent monitoring and health diagnosis technology of drilling key equipment can help to realize the life cycle management of drilling key equipment and significantly improve the level of drilling equipment evaluation business. For the health monitoring and fault diagnosis analysis of drilling pump and winch, this paper focuses on the research and design of the online monitoring and fault diagnosis system of drilling pump and winch using the Internet of Things technology. This system can realize remote real-time monitoring and fault diagnosis of the drilling process, reduce the workload of on-site personnel, improve the management efficiency of equipment, and more safely ensure the exploration and development of oil and gas resources. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Failure analysis

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Critical Length Analysis for Linear Growth of Frictional resistance of Moving Flexible Screen String in Horizontal Borehole 13th

Critical Length Analysis for Linear Growth of Frictional Res...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Wang, Yong-Hong Gao, Xiang Liu, Xin-Yang Hu, Zhong-Zhi CNPC Engineering Technology R&D Company Limited Beijing102206 China School of Mechanical Engineering Sichuan University of Science and Engineering Sichuan644000 China

ISBN: (纸本)9789819702558

Aiming at the sand control problem of screen in ultra-short radius horizontal well, the influence factors of motion resistance and extension length of flexible screen are studied. Therefore, based on the theory of multi-body dynamics, a mathematical model of the downhole motion resistance of the flexible screen with spherical hinge connection was established, and the simulation model of the motion resistance of the flexible screen was constructed by AdAMS software, and the influence of multiple factors on the model of the pipe string was analyzed. The results show that the motion resistance of flexible screen increases exponentially with the increase of the total length of screen and the friction coefficient. There is a critical length with linear increase of motion resistance, and the main factors affecting the critical length are the length of screen element and the friction coefficient. Under limited thrust, increasing the length of the screen unit and reducing the downhole friction coefficient are beneficial to improve the critical length of flexible screens in downhole operations. In addition, considering the accumulation rate of downhole resistance, a local weight reduction method for flexible screen is proposed, which can not only improve the critical length, but also ensure the reliability and safety of the screen operation. This study aims to provide a theoretical basis for mastering the change law of motion resistance and extension length of flexible screen with spherical hinge connection, and provide a reference for the optimization design of flexible screen. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Friction

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