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Machine learning for carbonate formation drilling: Mud loss prediction using seismic attributes and mud loss records

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Petroleum Science 2024年第2期21卷 1241-1256页

作者： Hui-Wen Pang han-qing wang Yi-Tian Xiao Yan Jin Yun-Hu Lu Yong-Dong Fan Zhen Nie National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China College of Science China University of Petroleum-BeijingBeijing102249China Petroleum Exploration and Production Research Institute SINOPECBeijing102206China College of Petroleum Engineering China University of Petroleum-BeijingBeijing102249China Research Institute of Petroleum Exploration and Development CNPCBeijing100083China

Due to the complexity and variability of carbonate formation leakage zones, lost circulation prediction and control is one of the major challenges of carbonate drilling. It raises well-control risks and production expenses. This research utilizes the H oilfield as an example, employs seismic features to analyze mud loss prediction, and produces a complete set of pre-drilling mud loss prediction solutions. Firstly, 16seismic attributes are calculated based on the post-stack seismic data, and the mud loss rate per unit footage is specified. The sample set is constructed by extracting each attribute from the seismic trace surrounding 15 typical wells, with a ratio of 8:2 between the training set and the test set. With the calibration results for mud loss rate per unit footage, the nonlinear mapping relationship between seismic attributes and mud loss rate per unit size is established using the mixed density network model.Then, the influence of the number of sub-Gausses and the uncertainty coefficient on the model's prediction is evaluated. Finally, the model is used in conjunction with downhole drilling conditions to assess the risk of mud loss in various layers and along the wellbore trajectory. The study demonstrates that the mean relative errors of the model for training data and test data are 6.9% and 7.5%, respectively, and that R2is 90% and 88%, respectively, for training data and test data. The accuracy and efficacy of mud loss prediction may be greatly enhanced by combining 16 seismic attributes with the mud loss rate per unit footage and applying machine learning methods. The mud loss prediction model based on the MDN model can not only predict the mud loss rate but also objectively evaluate the prediction based on the quality of the data and the model.

关键词： Lost circulation Risk prediction Machine learning Seismic attributes Mud loss records

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Rice roots avoid asymmetric heavy metal and salinity stress via an RBOH-ROS-auxin signaling cascade

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Molecular Plant 2023年第10期16卷 1678-1694页

作者： han-qing wang Xing-Yu Zhao Wei Xuan Peng wang Fang-Jie Zhao State Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China

Root developmental plasticity is crucial for plants to adapt to a changing soil environment,where nutrients and abiotic stress factors are distributed heterogeneously.How plant roots sense and avoid heterogeneous abiotic stress in soil remains unclear.Here,we show that,in response to asymmetric stress of heavy metals(cadmium,copper,or lead)and salt,rice roots rapidly proliferate lateral roots(LRs)in the stress-free area,thereby remodeling root architecture to avoid localized stress.Imaging and quantitative analyses of reactive oxygen species(ROS)showed that asymmetric stress induces a ROS burst in the tips of the exposed roots and simultaneously triggers rapid systemic ROS signaling to the unexposed roots.Addition of a ROS scavenger to either the stressed or stress-free area abolished systemic ROS signaling and LR proliferation induced by asymmetric stress.Asymmetric stress also enhanced cytosolic calcium(Ca^(2+))signaling;blocking Ca^(2+)signaling inhibited systemic ROS propagation and LR branching in the stress-free area.We identified two plasma-membrane-localized respiratory burst oxidase homologs,OsRBOHA and OsRBOHI,as key players in systemic ROS signaling under asymmetric stress.Expression of OsRBOHA and OsRBOHI in roots was upregulated by Cd stress,and knockout of either gene reduced systemic ROS signaling and LR proliferation under asymmetric stress.Furthermore,we demonstrated that auxin signaling and cell wall remodeling act downstream of the systemic ROS signaling to promote LR development.Collectively,our study reveals an RBOH-ROS-auxin signaling cascade that enables rice roots to avoid localized stress of heavy metals and salt and provides new insight into root system plasticity in heterogenous soil.

关键词： root system architecture heterogenous abiotic stress reactive oxygen species signaling

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Molecular mechanisms underlying the toxicity and detoxification of trace metals and metalloids in plants

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Journal of Integrative Plant Biology 2023年第2期65卷 570-593页

作者： Zhong Tang han-qing wang Jie Chen Jia-Dong Chang Fang-Jie Zhao State Key Laboratory of Crop Genetics and Germplasm Enhancement College of Resources and Environmental SciencesNanjing Agricultural UniversityNanjing 210095China

Plants take up a wide range of trace metals/metalloids(hereinafter referred to as trace metals)from the soil,some of which are essential but become toxic at high concentrations(e.g.,Cu,Zn,Ni,Co),while others are non-essential and toxic even at relatively low concentrations(e.g.,As,Cd,Cr,Pb,and Hg).Soil contamination of trace metals is an increasing problem worldwide due to intensifying human activities.Trace metal contamination can cause toxicity and growth inhibition in plants,as well as accumulation in the edible parts to levels that threatens food safety and human health.Understanding the mechanisms of trace metal toxicity and how plants respond to trace metal stress is important for improving plant growth and food safety in contaminated soils.The accumulation of excess trace metals in plants can cause oxidative stress,genotoxicity,programmed cell death,and disturbance in multiple physiological processes.Plants have evolved various strategies to detoxify trace metals through cell-wall binding,complexation,vacuolar sequestration,efflux,and translocation.Multiple signal transduction pathways and regulatory responses are involved in plants challenged with trace metal stresses.In this review,we discuss the recent progress in understanding the molecular mechanisms involved in trace metal toxicity,detoxification,and regulation,as well as strategies to enhance plant resistance to trace metal stresses and reduce toxic metal accumulation in food crops.

关键词： detoxification food safety stress response trace metals/metalloids toxic mechanisms

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EPR and DFT Study of the Polycyclic Aromatic Radical Cations from Friedel-Crafts Alkylation Reactions

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Chinese Journal of Chemical Physics 2009年第1期22卷 51-56页

作者： Tao wang An-an Wu Li-guo Gao han-qing wang Department of Chemistry and Chemical Engineering Heze University Heze 274015 China State Key Laboratory of Physical Chemistry of Solid Surfaces School of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China College of Chemistry and Chemical Engineering Yulin College Yulin 719000 China Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

电子顺磁的回声和电子原子的双回声方法被用来学习在一个 Friedel 手艺烷基 ating 系统生产的多不的芳香的激进的阳离子，与 m 二甲苯，或 p 二甲苯和烷基氯化物。结果显示顺磁的回声系列由于多不的芳香的激进分子的观察电子从父母烃形... 详细信息

电子顺磁的回声和电子原子的双回声方法被用来学习在一个 Friedel 手艺烷基 ating 系统生产的多不的芳香的激进的阳离子，与 m 二甲苯，或 p 二甲苯和烷基氯化物。结果显示顺磁的回声系列由于多不的芳香的激进分子的观察电子从父母烃形成了。在 Friedel 手艺完化反应生产的本甲基卤化物经历 Scholl 自我冷凝作用给多不的芳香的烃，这被建议，它面对 AlCl 3 被变换成相应多不的芳香的激进的阳离子。鉴定观察到二激进分子 2,6-dimethylanthracene 和 1,4,5,8-tetramethylanthracene 被密度支持用 B3LYP/6 31G 的功能的理论计算(d， p )// B3LYP/6 31G (d) 途径。理论联合常数支持观察激进分子的试验性的任务。

关键词：顺磁共振光谱学多环芳烃自由基阳离子碳氢化合物三氯化铝

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Interactions of 1-hexyl-3-methylimidazolium Bromide with Acetone

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Chinese Journal of Chemical Physics 2006年第5期19卷 447-450页

作者： Cui-ping Zhai Jian-ji wang Xiao-peng Xuan han-qing wang Miao Chen State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China School of Chemistry and Environmental Sciences Henan Key Laboratory of Environmental Pollution Control Henan Normal University Xinxiang 453007 China College of Chemistry and Chemical Engineering Henan University Kaifeng 475001 China

1 H 和 13 C NMR 化学移动决心与房间温度调查丙酮的相互作用离子的液体 1-hexyl-3- methylimidazolium 溴化物[C 6 mim ] 在各种各样的鼹鼠部分的 Br。在氢原子核并且有丙酮集中的碳原子核的化学移动的变化显示了在离子的液体的阴离子... 详细信息

1 H 和 13 C NMR 化学移动决心与房间温度调查丙酮的相互作用离子的液体 1-hexyl-3- methylimidazolium 溴化物[C 6 mim ] 在各种各样的鼹鼠部分的 Br。在氢原子核并且有丙酮集中的碳原子核的化学移动的变化显示了在离子的液体的阴离子和丙酮的甲基质子之间的氢债券的形成。NMR 结果在对 ab initio 的好同意是计算结果。

关键词： 1H和13C核磁共振化学位移溴代1-己基-3-甲基咪唑离子液体丙酮相互作用

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Poly(ethylene oxide) Solubilization in Reverse Microemulsion:Conductivity and UV-Vis Spectra Studies

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Chinese Chemical Letters 2000年第8期11卷 735-738页

作者： Zhen Shan HOU Zhi Ping LI han qing wang Xinjiang Institute of Chemistry The Chinese Academy of sciencesUrumqi 830011 Lanzhou Institute of Chemical Physics The Chinese Academy of sciencesLanzhou730000

The effect of poly (ethylene oxide) (PEO) on the w/o microemulsion is studied. The addition of PEO induces a decrease of attractive interaction between droplets in reverse microemulsion. Due to the absence of interaction between cationic surfactant and neutral polymer, the polymer molecules are forced into the interior of water core, avoiding the interfacial region.

关键词： reverse microemulsion cationic surfactant electrical percalation PEO

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New Sesquiterpenoids from Hedychium yunnanense gagnep

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Chinese Chemical Letters 2000年第11期11卷 1009-1012页

作者： Xiu Hua LIU Dong Bao ZHAO Chong Ren YANG han qing wang Chemistry and Chemical Engineering College of Henan University Kaifeng 475001 Phytochemistry Laboratory Kunming Instute of BotanyC.A.S.Kunming 650204 Lanzhou Institute of Chemical Physics C.A.SLanzhou 730000

Two new sesquiterpenoid trialcohol isomers named 1b, 4a 11a-trihydroxyeudesmane (1) and Yunnanensehedychetriol (2), were isolated from the fresh rhizomes of Hedychium Yunnanense gagnep .Their structures were elucidate... 详细信息

关键词： Hedychium yunnanene Zingiberaceae sesquiterpenoid trialcohol isomers 1b 4a 11a-trihydroxyeudesmane YunnanensehedychetrioH

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Comparative analysis of twenty-five compounds in different parts of Astragalus membranaceus var.mongholicus and Astragalus membranaceus by UPLC-MS/MS

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Journal of Pharmaceutical Analysis 2019年第6期9卷 392-399页

作者： Yuan Li Sheng Guo Yue Zhu Hui Yan Da-Wei Qian han-qing wang Jian-Qiang Yu Jin-Ao Duan Jiangsu Collaborative Innovation Center of Chinese Medicinal Resources Industrialization State Administration of Traditional Chinese Medicine Key Laboratory of Chinese Medicinal Resources Recycling UtilizationNational and Local Collaborative Engineering Center of Chinese Medicinal Resources Industrialization and Formulae Innovative MedicineNanjing University of Chinese MedicineNanjing 210023China School of Pharmacy Ningxia Medical UniversityYinchuan 750021China

As a traditional Chinese medicine,the root of Astragalus membranaceus var.mongholicus(AMM)or A.membranaceus(AM)has been widely used in China and other Asian countries for thousands of years.Till now,the flavonoids,phenolic acids and saponins are considered as the main active components contributing to their therapeutic effect in these plants.In order to clarify the distribution and contents of these compounds in different organs of these plants,a rapid and sensitive analytical method for simultaneous determination of 25 active compounds including seven types(i.***.dihydroflavones,isoflavane,isoflavones,flavones,pterocarpans,phenolic acid and saponins)within 10 min was established using ultra-pressure liquid chromatography coupled with tandem mass spectrometry(UPLCeMS/MS).Then,the established method was fully validated and successfully applied to the determination of the contents of these analytes in different parts(root,rhizome,stem,leaf and flower)of AMM and AM.The results indicated that the contents of the same type of compounds in two different species plants were significantly different.Moreover,the obvious differences were also found for the distribution and contents of different type of compounds in five organs of the same species.The present study could provide necessary information for the rational development and utilization of AMM and AM resource.

关键词： Astragalus membranaceus var.mongholicus Astragalus membranaceus UPLCeMS/MS Flavonoid Saponin

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Two Novel Poly-Oxygen Bipyridine Alkaloids from Speranskia tuberculata

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Chinese Chemical Letters 2000年第3期11卷 225-228页

作者： Jian Gong SHI han qing wang Min wang Guang Xiong ZHOU Yong Chun YANG Wen Yan HU Institute of Materia Medica Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050 Lanzhou Institute of Chemical Physics Chinese Academy of SciencesLanzhou 730000

Two novel poly-oxygen bipyridine alkaloids, speranculatines A (1) and B (2) have been isolated from Speranskia tuberculata. Their structures were elucidated by spectroscopic methods including 2D NMR techniques and X-r... 详细信息

关键词： Speranskia tuberculata Euphorbiaceae speranculatines A and B

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A New Ecdysteroid from Rhaponticum uniflorum

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Chinese Chemical Letters 2001年第9期12卷 797-798页

作者： Yong Hong ZhanG Xin Pu LI Zhi Gang LU han qing wang Lanzhou Institute of Chemical Physics Chinese Academy of SciencesLanzhou 730000 Lanzhou Institute of Animal Science and Animal Medicine Lanzhou 730050

A new phytoecdysteroid was isolated from the root of Rhaponticum uniflorum. Its structure has been shown to be 2, 3, 20, 22-diacetonide ajugasterone.

关键词： Rhaponticum uniflorum compositae 2, 3, 20, 22-diacetonide ajugasterone

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