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Machine Learning Based CBM Well Multimodal Productivity Prediction and drainage Optimization 12th

Machine Learning Based CBM Well Multimodal Productivity Pred...

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12th International Field Exploration and development Conference, IFEdC 2022

作者： Fang, Ye-Xin Wu, Jia-Yi Chen, Zan Yang, Xiang-Tong Ma, Ru-Tao Lian, Zhi-Long Qiao, Yan CNPC Engineering Technology R & D Company Limited Beijing China Institute of Exploration and Development SINOPEC Shanghai Offshore Oil and Gas Company Shanghai China Sinopec Petroleum Exploration and Production Research Institute Beijing China

ISBN: (纸本)9789819919635

Low permeability in most Chinese coalbed methane (CBM) reservoir would cause stress sensitivity and pulverized coal blockage. These damages seriously lower well productivity. The rationality of drainage system is one of the most important subjective factors that affect well productivity. This paper analyzes and processes the production data of an actual CBM reservoir in Sichuan province and establishes a machine learning based multimodal productivity prediction model for CBM wells. Using different parameter combinations to characterizes the drainage system and establishes a quantitative drainage Bayesian optimization model. The application in the actual CBM reservoir of this method shows that it can accurately predict the average daily gas production, gas breakthrough time and stable gas production. It can optimizes a close to platform period of bottom hole pressure, so that the pressure drop can be effectively propagated and the total production of CBM wells can be increased. The machine learning based multimodal productivity prediction model and drainage optimization model can be popularized and applied in Chinese CBM reservoirs and guide production. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Coal bed methane

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development of High Temperature Resistant Soft Metal Sealing Components in downhole Tools

Development of High Temperature Resistant Soft Metal Sealing...

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2024 International Petroleum technology Conference, IPTC 2024

作者： Guo, Huijuan Li, Jianghao Song, Xiping Guodong, david Zhan Wang, Baodong Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing China Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia

ISBN: (纸本)9781959025184

The sealing components plays the role of sealing and pressure resistance of downhole tools, which is a key component that determines the safe and reliable operation of downhole tools. With the development of oil and gas exploitation towards deep and ultra-deep wells, the performance requirements of sealing components for downhole tools are gradually improved. Rubber materials are prone to aging and deterioration in downhole high temperature and corrosive environment, resulting in sealing failure and difficulty in maintaining good sealing for a long time. Soft metal materials have the characteristics of high temperature resistance, high sealing pressure and corrosion resistance. The application of high temperature resistant soft metal materials in petroleum engineering sealing components can better solve the problem of aging failure of rubber sealing components, which is of great significance for ensuring the safety of downhole sealing. Based on the introduction of the application of soft metal materials in petroleum engineering, this paper studies the refining method of copper-based soft metal materials, and determines the formula of soft metal materials with excellent performance by analyzing the microstructure of soft metal materials. Based on the developed soft metal material, the high temperature tensile mechanical properties test, high temperature elastic modulus test were carried out. The feasibility of using copper-based soft metal as sealing element in petroleum engineering was analyzed, and the soft metal sealing element for expansion pipe sealing was designed. The research results show that: (1) Metal material seals have been widely studied at home and abroad, and some products have been maturely applied in the market, with good mechanical properties and sealing performance. (2) By adding Ga, Rh, Si and other alloying elements to copper metal, the metal wettability, temperature resistance and elastic properties of the material can be improved, and the seal

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development and Application of Full Vector Geosteering Comprehensive Analysis Software-OneSteer 11th

Development and Application of Full Vector Geosteering Compr...

引用

11th International Field Exploration and development Conference, IFEdC 2021

作者： Lin, Wang Wu, dong Liu, Lifeng Zhu, Weixing Xue, Hongzhi CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Research Institute of Petroleum Exploration and Development Beijing China

ISBN: (纸本)9789811921483

Horizontal well technology is a favorable means for the efficient development of "deep, low permeability, offshore, unconventional" and other complex reservoirs, and its key is to improve the drilling rate of the target geological body. Based on the analysis of the business process and requirements of geosteering, aiming at the geological characteristics of China's continental shale, carbonate and glutenite reservoirs, the key technical problems such as geo-steering based stratigraphic structure model modeling, main LWd instrument curve forward modeling, interactive geological model editing, dynamic extraction of stratigraphic parameters, multi-information fusion seismic inversion and so on have been solved, and a full vector geosteering comprehensive analysis software named OneSteer was developed. The software is applied to the field geo-steering analysis of carbonate reservoir in southwest of China and shale reservoirs in Xinjiang oilfields, which improves the drilling encounter rate, reduces the drilling risk, improves the drilling efficiency, and achieves satisfactory results. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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Numerical Simulation of Effects of Shock Waves on the Integrity of Cement Sheath

Numerical Simulation of Effects of Shock Waves on the Integr...

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2022 International Petroleum technology Conference, IPTC 2022

作者： Zhan, Guodong david Xu, Jianhui Aljohar, Abdulwahab Guo, Huijuan Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9781613998335

With the application of electrical explosion technology in the oil industry, such as plugging removal, wax removal and micro-cracks generation near the wellbore zone, the impact of shock wave generated by the electrical explosion on cement sheath cannot be ignored. To study the effect of electrical explosion downhole application on the integrity of cement sheath during the operation, a numerical simulation was used. A composite model of casing-cement sheath-rock is established in AUTOdYN. The propagation process of shock waves in the composite and the damage to cement sheath are studied. The results show that the shock wave propagates through the perforation hole in the liquid and keeps a high pressure in the perforated area. In the nonperforated area, the shock wave decays greatly after passing through the casing pipe. When the cement sheath and rock are subjected to the shock waves, the damage area extends outward from the perforation hole. The cement sheath and rock are mainly subjected to the tensile and shear damage by the shock waves. What is more, the casing deformation caused by shock waves may also contribute to the damage of cement sheath behind the casing. Copyright © 2022, International Petroleum technology Conference.

关键词： Shock waves

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Analysis of concentration field in Underground-Storage salt cavern using Two-Well-Vertical Solution Mining 56

Analysis of concentration field in Underground-Storage salt ...

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56th U.S. Rock Mechanics/Geomechanics Symposium

作者： Guan, Yueyang Ban, Fansheng Wang, Xiaoyang Chen, Chunyu CNPC Engineering Technology R&D Company Limited Beijing China Sinopec research Institute of petroleum engineering Beijing China Oil & Gas Technology Research Institute Changqing Oilfield Company Shaanxi China

ISBN: (纸本)9780979497575

The well spacing and the brine concentration are crucial for the volume and morphology of the two-well salt cavern gas storage by affecting dissolution rate of the cavity. However, it is hard to directly monitor the brine concentration inside the cavity. This study uses the classical method of Navier-Stokes, based on which the three-dimensional mathematical model of Two-Well-Vertical solution mining is established. Using Semi-Implicit Method for Pressure Linked Equations (SIMPLE) algorithm to solve the concentration distribution, while using Volume of Fluent (VOF) algorithm to solve the movement of boundary, so as to research the variation of cavity shape. According to the simulation results, it can be concluded that the region with the brine concentration of 210 g/L - 270 g/L is the key to enlarge the cavity volume in the connectivity stage. Compared with single-well salt cavern gas storage, two-well salt cavern gas storage mainly expands along the connection direction of two wells. The well spacing of 50 m can increase the maximum cavity diameter by nearly 78% compared to that of 10 m. With the increase of well spacing, the final cavity shape will change from cone shape to hump shape, however, the large well spacing may affect the cavity forming efficiency. © 2022 ARMA, American Rock Mechanics Association.

关键词： Salt deposits

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Wellbore Cooling and Wellbore Temperature Field Simulation for Underground Coal Gasification 57

Wellbore Cooling and Wellbore Temperature Field Simulation f...

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57th US Rock Mechanics/Geomechanics Symposium

作者： Che, Yang Yuan, Guangjie Liu, Yishan Li, Guangyao Liu, Longquan Yao, Baoheng National Engineering Research Center for Oil & Gas Drilling and Completion Technology CNPC Engineering Technology R&D Company Limited Beijing China Southwest Petroleum University Sichuan province Chengdu China Shanghai Jiao Tong University Shanghai China

ISBN: (纸本)9780979497582

Underground coal gasification (UCG) technology integrates three processes: well construction, coal mining and gasification. It not only overcomes the safety problems of existing mine coal mining, but also avoids the pollution of waste gas, waste water and waste residue in the process of surface coal gasification of traditional coal mining. It has the advantages of low gas production cost, high safety and good environmental benefits. However, effective temperature control technology of production wellbore still needs to be developed. Based on the annulus spray method and the combination of insulated oil pipe and spray device, a set of high-temperature gas spray cooling scheme is developed by using NASA variable specific heat calculation formula, considering the variation of specific heat value of main components of high-temperature mixture with temperature, and the finite element model of production wellbore is established by using commercial software (CFX), The temperature field and pressure field of production wellbore are simulated and analyzed. The analysis results show that the developed spray cooling scheme can effectively control the production wellbore temperature, achieve the design goals of slightly lower than 350 ℃ when the high-temperature gas is output to the ground and no gasification of annulus cooling water. The research methods and results have important practical significance for promoting the development of underground coal gasification process and even engineering application. © 2023 57th US Rock Mechanics/Geomechanics Symposium. All Rights Reserved.

关键词： Specific heat

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Quantitative Evaluation Method and Application of Wellbore Stability Based on Geomechanics 56

Quantitative Evaluation Method and Application of Wellbore S...

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56th U.S. Rock Mechanics/Geomechanics Symposium

作者： Zhai, Wenbao Wang, Qian Chen, Zhixue Chen, Xuefeng Li, Bo Hao, Weiwei Jiang, Jiwei Li, Mingyin Liu, dezhi Rao, Jiafu CNPC Engineering Technology R&D Company Limited Beijing102206 China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing102206 China

ISBN: (纸本)9780979497575

Wellbore instability is one of the difficult problems restricting safe drilling. The traditional theoretical model of wellbore stability is easy to cause the actual drilling fluid density to be high and aggravate the risk of drilling lost circulation. Therefore, firstly, the rock mechanics parameter profile is quantitatively obtained according to the field multi-source data, and the single well geomechanics model is established;Then, the Monte Carlo method is used to comprehensively consider the uncertainty of geomechanical parameters, and a quantitative evaluation method of wellbore stability based on geomechanics is established to reasonably evaluate the wellbore stability probability and optimize the safe density window of drilling fluid;Finally, taking well X of an oil field in Western China as an example, the new method is used to quantitatively evaluate the wellbore stable section and unstable section, and the evaluation results are compared with the actual complex situation to dynamically optimize the density window of drilling fluid. The results show that the calculation results of the new method are consistent with the actual situation, and the probability of wellbore stability is more than 80%. This method can effectively evaluate the wellbore stability, and provide a reasonable density window of drilling fluid, reducing the drilling complexity and cost, which is of great significance to meet the requirements of safe and efficient drilling. © 2022 ARMA, American Rock Mechanics Association.

关键词： Stability

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research and Application of drilling engineering Monitoring and Remote Support technology for cnpc Key Wells 1

引用

11th International Field Exploration and development Conference, IFEdC 2021

作者： Zhao, Tong Wu, Hua Xu, Sheng-jiang Ge, Yun-hua Mei, Yun-yi Zhang, Yan-long CNPC Engineering Technology R&D Company Limited Beijing China Institute of Engineering and Technology Xinjiang Oilfield Company Karamay China Unconventional Petroleum Research Institute China University of Petroleum Beijing China

ISBN: (数字)9789811921490

ISBN: (纸本)9789811921483

The global oil and gas industry is in a critical period of digital transformation. digital technologies such as the Internet of Things (IoT), cloud computing, big data, artificial intelligence (AI), and blockchain help accelerate the digital transformation and intelligent development of petroleum companies. The remote drilling support technology (RdST) integrates drilling engineering and digital technologies to promote lean management in the drilling process. engineering Information Smart Center (EISC) was developed based on RdST for intelligent drilling optimization design. The center could be used to improve the drilling speed, efficiency, and quality based on Measurement While drilling (MWd) data. It could also be used to enhance the early detection rate and disposal rate of complex drilling accidents. The application of EISC has promoted economic development and safety production in many oil and gas fields. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Big data

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Quantitative Evaluation Method and Application of Fault/Fracture Slip Risk Based on Geomechanics 56

Quantitative Evaluation Method and Application of Fault/Frac...

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56th U.S. Rock Mechanics/Geomechanics Symposium

作者： Zhai, Wenbao Wang, Qian Chen, Zhaowei Feng, Xiao Huang, Haoyong Zhou, Xiaojin Xu, Ersi Yang, Xinrui CNPC Engineering Technology R&D Company Limited Beijing102206 China Shale Gas Research Institute PetroChina Southwest Oil & Gas field Company Chengdu610051 China

ISBN: (纸本)9780979497575

Casing deformation is a key issue that limits the efficient development of shale gas in the Sichuan Basin, southwest China. In recent years, although the internal and external factors of casing deformation have been identified, the interaction mechanism between the internal and external factors has always been the bottleneck restricting the effective implementation of casing deformation prevention strategies. Therefore, firstly, high-resolution seismic data are used to identify potential faults/fractures and analyze the distribution characteristics of fault/fractures;Secondly, the rock mechanics and in-situ stress parameters are quantitatively obtained by using field multi-source data, and a three-dimensional geomechanical model is established to clarify the distribution characteristics of regional in-situ stress;Then, Based on the mechanical conditions of fault/fracture activation, the assessment method of fault/fracture slip risk based on geomechanics is established by using the Monte Carlo method considering the uncertainty of fault/fracture occurrence, in-situ stress, and other influencing parameters;Finally, taking the area of Ning X well as an example, the new method is used to quantitatively evaluate the fault/fracture slip risk. Meanwhile, the evaluation results and the prediction results based on fault/fracture and in-situ stress distribution are separately compared with the actual casing deformation position. The results show that the coincidence between the assessment results of fault/fracture slip risk based on geomechanics and the actual casing deformation position is more than 85%, while the prediction results are based on fault/fracture and in-situ stress distribution characteristics are less than 80%. The research results are helpful to clarify the interaction mechanism between internal and external causes of casing deformation, which can provide a reference for the field-targeted implementation of casing deformation prevention strategies. © 2022 ARM

关键词： Geomechanics

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Three-dimensional Geomechanical Modeling and Well Spacing Optimization Application in Sichuan Shale Gas Block 56

Three-dimensional Geomechanical Modeling and Well Spacing Op...

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56th U.S. Rock Mechanics/Geomechanics Symposium

作者： Qian, Wang Haoyong, Huang Hongwei, Jiang Chao, Fang Wenbao, Zhai Chenxi, Ye Xiao, Feng CNPC Engineering Technology R&D Company Limited Beijing China Petrochina SourthWest Oil&Gas field Company Shale Gas Research Institute Sichuan Chengdu China

ISBN: (纸本)9780979497575

At present, unconventional reservoirs require horizontal drilling and large-scale hydraulic fracturing technology to increase artificial fracture networks in the reservoir. due to regional differences in geological characteristics, geomechanical properties and reservoir characteristics, the fracturing results are different under the same hydraulic fracturing conditions. In some regions, horizontal well groups with the same spacing have poor fracturing connectivity, and in some regions, the fracturing interference with each other seriously, which makes it impossible to extract oil/gas efficiently and achieve the optimal production capacity. Aiming at the fracturing interference problem of shale gas block in Sichuan province, the three-dimensional geomechanical models are studied. Using the geological structure, geological and geomechanical properties, natural fracture system and stress distribution data provided by the 3d comprehensive model, the dynamic coupling simulation between hydraulic fracturing and geomechanics of adjacent typical wells are carried out on the high precision model of typical platform. Considering reservoir heterogeneity, in-situ stress anisotropy, the interaction between hydraulic fractures and natural fractures, the interaction between hydraulic fractures and the distribution of hydraulic fracture network under the current main fracturing technology and process conditions are simulated. Based on hydraulic fracturing network parameters and morphology, reasonable horizontal well spacing is determined to ensure maximum fracturing effect without fracturing interference and improve shale gas productivity. The research results show that, The well spacing decrease while horizontal in-stress, horizontal stress difference increase. The well spacing increase while natural fracture development, fluid volume and cluster spacing increase. © 2022 ARMA, American Rock Mechanics Association.

关键词： Hydraulic fracturing

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