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Theoretical Progress and Key Technologies of Onshore Ultra-Deep Oil/Gas Exploration

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Engineering 2019年第3期5卷 458-470页

作者： Xusheng Guo Dongfeng Hu Yuping li Jinbao Duan Xuefeng Zhang Xiaojun Fan Hua Duan wencheng li SINOPEC Exploration Company Chengdu 610041 China Institute of Oil and Gas School of Earth and Space Sciences Peking University Beijing 100871 China

Oil/gas exploration around the world has extended into deep and ultra-deep strata because it is increasingly difficult to find new large-scale oil/gas reservoirs in shallow–middle buried strata. In recent years, China has made remarkable achievements in oil/gas exploration in ultra-deep areas including carbonate and clastic reservoirs. Some (ultra) large-scale oil and gas fields have been discovered. The oil/gas accumulation mechanisms and key technologies of oil/gas reservoir exploration and development are summarized in this study in order to share China’s experiences. Ultra-deep oil/gas originates from numerous sources of hydrocarbons and multiphase charging. liquid hydrocarbons can form in ultradeep layers due to low geothermal gradients or overpressures, and the natural gas composition in ultra-deep areas is complicated by the reactions between deep hydrocarbons, water, and rock or by the addition of mantle- or crust-sourced gases. These oils/gases are mainly stored in the original highenergy reef/shoal complexes or in sand body sediments. They usually have high original porosity. Secondary pores are often developed by dissolution, dolomitization, and fracturing in the late stage. The early pores have been preserved by retentive diageneses such as the early charging of hydrocarbons. Oil/gas accumulation in ultra-deep areas generally has the characteristics of near-source accumulation and sustained preservation. The effective exploration and development of ultra-deep oil/gas reservoirs depend on the support of key technologies. Use of the latest technologies such as seismic signal acquisition and processing, low porosity and permeability zone prediction, and gas–water identification has enabled the discovery of ultra-deep oil/gas resources. In addition, advanced technologies for drilling, completion, and oil/gas testing have ensured the effective development of these fields.

关键词： Oil/gas exploration Ultra-deep sources Reservoir Petroleum accumulation Exploration and exploitation technologies

Trinuclear gold-catalyzed site-selective alkylation of peptides

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Science China Chemistry 2025年第1期68卷 249-256页

作者： Qing-Yun Fang Chengyihan Gu Yinghan Chen wencheng Yan Yong liang Weipeng li Chengjian Zhu Jie Han Jin Xie State Key Laboratory of Coordination Chemistry Jiangsu Key Laboratory of Advanced Organic Materials Chemistry and Biomedicine Innovation Center (Chem BIC) School of Chemistry and Chemical Engineering Nanjing University Green Catalysis Center College of Chemistry Zhengzhou University State Key Laboratory of Natural Medicines China Pharmaceutical University

Selective modification of peptides has always been a challenging issue. The selective alkylation of peptides can alter the biological activity and physical properties of molecules, and it has gained significant research interest. We herein disclose an intriguing gold-catalyzed alkylation of peptides using bench-stable unactivated alkyl bromides under photoredox catalysis. A wide range of structurally diverse primary, secondary and tertiary alkyl bromides serve as effective coupling partners to precisely connect with the α-C(sp3)–H in glycine residue of peptides. This protocol demonstrates an exceptionally broad scope for alkyl halides and excellent tolerance for a wide range of useful functional groups. A series of relay transformations to construct cyclic peptides, to proceed click reaction and to realize peptide fluorescence labeling further enhance its synthetic practicality. In addition, mechanistic studies and density functional theory(DFT) calculations reveal an inner-sphere and subsequent outersphere single electron transfer(SET) mechanism.

关键词： gold catalysis peptide alkylation C-C coupling radical

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涪陵页岩气田焦石坝区块页岩脆性指数地震定量预测

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天然气工业 2017年第7期37卷 13-19页

作者：李金磊李文成中国石油化工股份有限公司勘探分公司

为了确定四川盆地涪陵页岩气田焦石坝地区页岩储层相对高脆性层段及压裂有利区,研发了适应于复杂构造应力环境的多参量页岩脆性指数的地震定量预测技术。首先通过对构造、岩石矿物组分、岩心裂缝发育程度、测井、地震等资料的综合分析,... 详细信息

为了确定四川盆地涪陵页岩气田焦石坝地区页岩储层相对高脆性层段及压裂有利区,研发了适应于复杂构造应力环境的多参量页岩脆性指数的地震定量预测技术。首先通过对构造、岩石矿物组分、岩心裂缝发育程度、测井、地震等资料的综合分析,明确了构造挤压应力对岩石脆性特征的影响作用;然后在Rickman公式的基础上,引入反映横向剪切应力—应变作用的剪切模量,构建了基于杨氏模量、泊松比、剪切模量×密度的新脆性指数预测模型;最后结合基于矿物组分的弹性岩矿脆性指数法可精确计算全井段脆性指数的优势,形成了适应复杂构造应力环境的多参量页岩脆性指数定量预测技术。应用效果表明:(1)利用该技术预测的结果与未参与建模探井的脆性指数计算结果吻合较好,相对误差在4%以内,证明该技术是可靠的;(2)焦石坝地区上奥陶统五峰组—下志留统龙马溪组优质页岩的脆性指数具有自上而下逐渐增高的趋势且横向上分布稳定,其中五峰组—龙马溪组一段一亚段的脆性指数为最高,是水平井穿行与压裂的最有利层段。

关键词：四川盆地涪陵页岩气田晚奥陶世早志留世应力环境剪切模量脆性指数地震定量预测有利层段

盘状石核剥片实验及对华北石片石器研究的启示

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人类学学报 2022年第3期41卷 514-522页

作者：李文成首都师范大学历史学院北京100089

盘状石核以两面交互打击、向心剥片为主要特征,在中国旧石器文化发展中具有重要地位。本文针对华北石片石器中盘状石核与非定型石核长期共存这一文化现象,展开剥片实验,分析了这两种剥片策略所获得的石片之间的差异。研究发现,石片的台... 详细信息

盘状石核以两面交互打击、向心剥片为主要特征,在中国旧石器文化发展中具有重要地位。本文针对华北石片石器中盘状石核与非定型石核长期共存这一文化现象,展开剥片实验,分析了这两种剥片策略所获得的石片之间的差异。研究发现,石片的台面类型、背面片疤方向、保留石核台面边缘特征石片比例这三个指标可以有效区分这两种剥片策略,石片的技术分析对于理解华北石片石器工业的剥片策略同样具有重要价值。

关键词：实验盘状石核剥片石片石器

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基于远场光学的高分辨率激光探针系统研究

红外与激光工程 2017年第10期46卷 100-106页

作者：郑重吕瑶李文成 92941部队91分队辽宁葫芦岛125000

鉴于激光探针分辨率低的问题,提出基于远场光学技术对激光探针仪的光学系统进行改进和设计,实现了高分辨率激光探针仪的研制。研究了基于远场光学的激光探针仪的极限分辨率,采用数值孔径为0.4的反射式聚焦物镜对波长为532 nm的脉冲激光... 详细信息

鉴于激光探针分辨率低的问题,提出基于远场光学技术对激光探针仪的光学系统进行改进和设计,实现了高分辨率激光探针仪的研制。研究了基于远场光学的激光探针仪的极限分辨率,采用数值孔径为0.4的反射式聚焦物镜对波长为532 nm的脉冲激光束进行聚焦,在合适能量条件下,烧蚀Al和Fe纯样表面获得的极限分辨率分别为2.26μm和1.87μm,在此极限分辨率下利用同轴光谱采集系统且能够采集到3倍于背景噪声强度的Al和Fe元素的光谱信号;设计并实现了带同轴照明的同轴共焦成像系统,视场放大率达24.7倍,采用的同轴照明系统能够有效提高摄取图像的锐度和清晰度,获得的图像分辨率不低于228 lines/mm;发明了一种带指示光的同轴光谱采集系统,能够将同轴光谱采集器与等离子体的对准误差控制在10μm以内,通过二维扫描装置,实现对等离子体表面7×9的矩形点阵列进行精确光谱采集,获得了等离子体原子光谱强度的空间分辨图像。

关键词：远场激光探针分辨率同轴监测同轴光谱采集

Study on correlation between humic acid and selenium in Kaschin-Beck disease areas

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Journal of Environmental Sciences 1991年第4期3卷 102-107页

作者： Zhang Xuelin, Ren Shufen, li wencheng,Wang Wensheng, Wang Jinda, Wang Wenjun,and Zhang Yuxiachangchun Institute of Geography,Chinese Academy of Sciences,Changchun,China

The relationship between humic acid and selenium content was studied in this research. The results of calculation showed that there is more humic acid and less selenium in Kaschin-Beck disease areas in China. Fulvic acid in soil could increase selenium level in plants. The chemical bonding between humic acid and selenium was observed with an I.R. spectroscope. It was remarkable for the changes of absorption peak and frequency in 1100-1000 cm-1, 900-700 cm-1.

关键词： humic acid selenium Kaschin-Beck disease.

Humic acid and free radical in environment of Kaschin-Beck disease areas

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Journal of Environmental Sciences 1991年第4期3卷 95-101页

作者： Ren Shufen, Zhang Xuelin, li wencheng, Wang Wensheng, Wang Jinda, Wang Wenjun and Zhang YuxiaChangchun Institute of Geogrophy.Chinese Academy of Sciences,Changchun,China

The humic acid contents in drinking water and soil in Kaschin-Beck disease areas were found more than that of non-disease areas in this research. Changes of free radical concentration in drinking water were agreed with that of humic acid contents in drinking water of Kaschin-Beck disease areas. A positive correlation of free radical concentration and humic acid content in drinking water has been shown (r=0.913) . The structure of I. R. spectra of humic acid under ultraviolet light has been changed. Thus it indicated that free radical was resulted from benzoqiunonyl groups of humic acid in environment.

关键词： humic acid free radical Kaschin-Beck disease.

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彭头山文化的来源与澧阳平原的旧新石器过渡

南方文物 2023年第3期 209-215页

作者：李文成国家文物局考古研究中心

本文的分析表明,在澧阳平原彭头山文化的形成过程中,不仅可以观察到本地更新世末期狩猎采集人群文化的延续和创新,也同样可以看到来自潕水文化群的狩猎采集者、南岭—武夷山一线更新世末期至全新世早期洞穴人群的文化汇入。这一现象表... 详细信息

本文的分析表明,在澧阳平原彭头山文化的形成过程中,不仅可以观察到本地更新世末期狩猎采集人群文化的延续和创新,也同样可以看到来自潕水文化群的狩猎采集者、南岭—武夷山一线更新世末期至全新世早期洞穴人群的文化汇入。这一现象表明了彭头山文化人群与文化的多元性,也反映出澧阳平原旧新石器时代过渡过程的复杂性。

关键词：彭头山遗址澧阳平原旧新过渡多元性

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基于保色散关系的迎风WENO格式的研究

西北工业大学学报 2006年第2期24卷 165-169页

作者：李文成封建湖邓子辰西北工业大学陕西西安710072 长安大学陕西西安710064

W ENO(W eighted E ssentially N on-O scillatory)格式能够高分辨率地捕捉诸如激波等间断,而保色散关系(D issipation-R elation-P reserv ing,DRP)格式适宜于处理高频波传播问题。计算气动声学(Com putational-A eroacoustics,CAA)领域有大量的既有高频波传播又带有激波的问题,结合W ENO格式和DRP格式的优点基于保色散关系构造出优化的迎风W ENO格式。数值实验中比较该格式捕捉波数的能力和精度,显示处理CAA基本问题具有高精度、高分辨率的特点。

关键词：加权本质无振荡格式(WENO) 高分辨率保色散关系计算气动声学