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Impacts of proppant distribution on development of tight oil reservoirs with threshold pressure gradient

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petroleum Science 2024年第1期21卷 445-457页

作者： Ming Yue Wei-Yao Zhu fei-fei Gou Tian-Ru Song Yu-Chun You Qi-Tao {2. state key {2. of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing102206China School of Civil and resource Engineering University of Science and Technology BeijingBeijing100083China

Field evidence indicates that proppant distribution and threshold pressure gradient have great impacts on well *** at the development of unconventional oil reservoirs in Triassic Chang-7 Unit,Ordos Basin of china,we presented an integrated workflow to investigate how(1)proppant placement in induced fracture and(2.non-linear flow in reservoir matrix would affect well productivity and fluid flow in the *** with our research before(Yue et al.,2.2.),here we extended this study into the development of multi-stage fractured horizontal wells(MFHWs)with large-scale complicated fracture *** integrated workflow is based on the finite element method and consists of simulation models for proppant-laden fluid flow,fracture flow,and non-linear seepage flow,*** results indicate that the distribution of proppant inside the induced cracks significantly affects the productivity of the *** we assign an idealized proppant distribution instead of the real distribution,there will be an overestimation of 44.98%in daily oil rate and 30.63%in cumulative oil production after continuous development of 1000 ***,threshold pressure gradient(TPG)also significantly affects the well performance in tight oil *** we simply apply linear Darcy’s law to the reservoir matrix,the overall cumulative oil production can be overrated by 77%after 1000 days of *** general,this research provides new insights into the development of tight oil reservoirs with TPG and meanwhile reveals the significance of proppant distribution and non-linear fluid flow in the production scenario design.

关键词： Proppant distribution Tight oil reservoir Multi-stage fractured horizontal well Threshold pressure gradient Moving boundary

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天然气藏中硫化氢成因研究进展

新疆石油地质 2011年第5期32卷 552-556页

作者：赵兴齐陈践发张晨吴雪飞刘娅昭徐学敏中国石油大学油气资源与探测国家重点实验室北京102249

目前普遍认为天然气藏中硫化氢主要为生物硫酸盐还原(BSR)、硫酸盐热化学还原(TSR)和含硫化合物热裂解等成因。一般认为,天然气中高含硫化氢是硫酸盐热化学还原作用的结果。从气藏的地质和地球化学等方面,可以找到气藏发生硫酸盐热化学... 详细信息

目前普遍认为天然气藏中硫化氢主要为生物硫酸盐还原(BSR)、硫酸盐热化学还原(TSR)和含硫化合物热裂解等成因。一般认为,天然气中高含硫化氢是硫酸盐热化学还原作用的结果。从气藏的地质和地球化学等方面,可以找到气藏发生硫酸盐热化学还原作用后的许多证据,根据这些证据,可以很好地判断气藏是否发生过硫酸盐热化学还原作用。尽管对天然气藏中硫化氢研究已取得一定的成果,但仍存在许多亟待认识的问题,如硫化氢的成因机理、分布规律、地质-地球化学特征,硫化氢与油气的关系,以及硫化氢形成的主控因素等。总结了国内外关于硫化氢天然气成因研究进展及其存在的问题,以期引起人们对硫化氢天然气的关注。

关键词：硫化氢天然气硫酸盐热化学还原反应硫同位素碳同位素

Numerical Simulation of Interaction Between Tributary Debris Flow and Main River

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四川大学学报（工程科学版） 2005年第S1期37卷 75-80页

作者： zhang, Wanshun Cui, Peng Wang, Ying qiao, {2. Wang, Xiekang School of resource and Environmental Sci. Wuhan Univ. Wuhan 430072 China Inst. of Mountain Hazards and Environmental Disaster Chinese Academy of Sciences Chengdu 610041 China state key Lab. of Hydraulics and Mountain River Eng. Sichuan Univ. Chengdu 610065 China

Based on two-phase flow theory and shallow water flow assumption,a mathematical model is applied to simulate debris *** model considers a two-phase mixture of sediments and water *** that the sediments and the water fluid move downstream with the same velocity,the flow of the mixture is described using a two dimensional depth averaged model with a unique 2.D momentum equation and two mass balance e- quations for the mixture and the sediments,*** finite volume method is used f...

关键词： Debris flow water flow confluence theory numerical simulation

Do abrupt cryosphere events in High Mountain Asia indicate earlier tipping point than expected?

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Advances in Climate Change Research 2023年第6期14卷 873-883页

作者： Cun-De XIAO Tong zhang Tao che Zhi-Qiang WEI Tong-Hua WU Lei HUANG Ming-Hu DING {2. LIU Dong-Hui SHANGGUAN fei-Teng WANG Peng-Ling WANG Jie cheN Chun-Hai XU Xin-Wu XU Da-He QIN state key {2. of Earth Surface Processes and resource Ecology Beijing Normal UniversityBeijing 100875China state key {2. of Cryospheric Science Chinese Academy of SciencesLanzhou 730000China Faculty of Arts and Sciences Beijing Normal UniversityZhuhai 519000China National Climate Centre China Meteorological AdministrationBeijing 100081China Global Change and Polar Institute Chinese Academy of Meteorological ScienceBeijing 100081China Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610299China

Tipping points of about 16 elements have been identified in Earth system,yet cryospheric tipping point of specific Alpine region has not been *** we analyzed three tipping elements(mountain glacier,snow cover,and permafrost)identified in recent years,evidenced by the facts of frequent occurrence of abrupt massive collapse of glacier mass and the widespread thermakarst of *** 2.15,strikingly abrupt cryosphere events(ACEs)have been consistently observed over a large range of High Mountain Asia(HMA).Those events were un-precedentedly significant in history,leading to collapses of glaciers following by disconnection of glacier tongue from accumulation basin and recession of thermakarst towards higher *** decreasing of snow depth in 2.2. was also observed since 2.2./2.2. winter,coinciding with extreme warming of the *** widespread high warming rates in the last two decades over HMA might have triggered above *** dynamic thresholds of ACEs depend largely on high temperature,especially extreme heat wave,for both glaciers and permafrost,closely related to meltwater as a key factor for reaching initial conditions of abrupt changes,suggesting HMA cryosphere is a tipping element under the global warming level of 1.1℃.The ACEs can cause tremendous damage to local ecosystem and socioeconomy,measures to mitigate risks should be taken when the tipping points are reached.

关键词： Abrupt glacier change Thermakarst Snow depth Tipping point Early warning system

微波辐射对泥页岩孔隙发育的影响——以松辽盆地青山口组一段为例

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地质学报 2024年第10期98卷 3094-3105页

作者：王民唐育龙邓仔晓乔宏亮张宇辰潘宝昕深层油气全国重点实验室中国石油大学(华东)山东青岛266580 中国石油大学(华东)地球科学与技术学院山东青岛266580 大庆油田有限责任公司勘探开发研究院黑龙江大庆163712 中国石油长庆油田分公司第二采油厂甘肃庆阳745100

页岩油被认为是我国油气能源的革命者,其中中低熟页岩油资源潜力巨大。原位加热转化是中低熟页岩油有效开发的潜在技术。本文对松辽盆地青山口组一段富有机质泥页岩开展了常规加热和微波辐射加热实验,并结合场发射扫描电镜、低温氮气吸... 详细信息

页岩油被认为是我国油气能源的革命者,其中中低熟页岩油资源潜力巨大。原位加热转化是中低熟页岩油有效开发的潜在技术。本文对松辽盆地青山口组一段富有机质泥页岩开展了常规加热和微波辐射加热实验,并结合场发射扫描电镜、低温氮气吸附实验,系统对比了微波辐射和常规加热页岩时孔隙结构与演化特征。结果表明:有机孔的演化主要经历了开孔→孔隙合并→形成复合孔隙及裂缝三个阶段,加热相同温度时微波辐射能够促进有机质裂解形成有机孔,对微裂缝的发育具有明显的促进作用;随温度增加,孔隙结构参数变化复杂,孔径先增后降,孔体积和比表面积呈增加→降低→增加的特征;随微波辐射加热时间的增加,小于50 nm的孔隙体积大幅减小,中大孔体积明显增加,表明小孔隙逐渐扩张、合并并演变成大孔。微波辐射对页岩孔隙空间改善效果更显著,裂缝更发育,利于油气渗流,但同时发现微波辐射加热的功率过高、时间过长时将会破坏孔隙,不利于改善页岩微观孔隙空间。本项研究对于中低熟页岩油原位加热方式选择及加热过程中微观孔裂隙演化认识有一定的帮助。

关键词：中低熟页岩油微波辐射原位转化孔隙结构青山口组一段松辽盆地

A physical model study of shale seismic responses and anisotropic inversion

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petroleum Science 2021年第4期18卷 1059-1068页

作者： Pin-Bo Ding fei Gong Feng zhang Xiang-Yang Li state key {2. of petroleum resource and prospecting China University of Petroleum(Beijing)Beijing102249China CNPC key laboratory of Geophysical Exploration China University of Petroleum(Beijing)Beijing102249China

The seismic responses of the shale properties are critical for shale gas reservoir evaluation and *** has been widely reported that the clay minerals have substantial influences on the seismic wave anisotropy and ***,knowing the seismic responses of the clay-rich shales and estimation of shale elastic properties are significant for the shale gas industry.A physical model containing two groups of shale blocks as the target formations is constructed in *** group S contains six shale blocks with different clay contents,and the group N contains six shale blocks with different *** acquired 2. seismic data is used to analyze the seismic responses of two corresponding seismic *** anisotropic three-term inversion method is applied to one of the seismic inline to estimate the elastic properties the target shale *** inversed attributes can be used to reveal the effects of shale clay *** study shows the substantial significance of using a physical model to observe the seismic responses of shale *** inversion results indicate that the anisotropic three-term inversion method could provide accurate results of elastic properties as well as the P-wave anisotropy parameter for shale formations.

关键词： Physical model Shale Clay AVO Anisotropy

Sedimentary environment and petrological features of organic-rich fine sediments in shallow water overlapping deposits: A case study of Cambrian Yuertus Formation in northwestern Tarim Basin, NW china

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petroleum Exploration and Development 2020年第3期47卷 513-526页

作者： JIN Zhimin TAN Xiucheng TANG Hao SHEN Anjiang qiao Zhanfeng ZHENG Jianfeng LI {2. zhang Shixuan cheN Lei ZHOU chenggang state key {2. of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500China key laboratory of Carbonate Reservoir CNPCHangzhou 310023China Korla Branch of Geophysical Research Institute BGP Inc.Korla 841000China

Taking the Cambrian Yuertus Formation outcrop profiles in the Aksu-Keping-Wushi areas of northwestern Tarim Basin as examples, the depositional environments of organic rich fine sediment were analyzed by examining the outcrop profiles macroscopically and microscopically. The study reveals that:(1) The lower part of the Yuertus Formation consists of organic-rich fine sediment or thin rhythmic interbeds of organic-rich fine sediment and siliceous sediment, the formation transforms to terrigenous diamictic grain shoal and inverse grading carbonate rocks upward.(2. The thin limestone interbedded with dark shale rhythmically has inverse grading.(3) The thin-bedded siliceous rock has metasomatic residual granular texture, stromatolithic structure and cementation fabric in vugs.(4) There are iron crust layers at the top of the shallowing diamictic grain shoal, beneath which exposed karst signs, such as karrens, dissolved fissures, sack-like vugs, near surface karst(plastic) breccia, breccia inside the karst system and terrigenous clastic fillings, can be seen.(5) Both the outcrops and seismic profiles show that organic-rich fine sediments above the unconformities or exposed surfaces are characterized by overlapping. The organic-rich fine sediment of the Cambrian Yuertus Formation was deposited in the anoxic-suboxidized restricted gulf lagoon environment, and its formation was controlled by high paleoproductivity and poor oxygen exchange jointly, then a shallow-water overlapping sedimentary model has been established. The results will help enrich and improve the sedimentary theory of organic-rich fine sediments.

关键词： fine-grained sediments source rock shallow water overlap exposed surface paleokarst sedimentary model Cambrian Yuertus Formation Tarim Basin

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A study on hydrocarbon generation potential of deep source rocks and gas sources in Changling Fault Depression,Songliao Basin

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Chinese Journal Of Geochemistry 2011年第2期30卷 255-263页

作者： Zan, Ling zhang, Zhihuan fei, Jiajia Wu, Yuyuan zhang, Zhenying Qin, Liming Mei, Ling Li, Wenhao state key {2. of petroleum resource and prospecting China University of Petroleum Beijing 102249 China East china Branch of SINOPEC Nanjing 210011 China beijing Economic Management Institute Beijing 100102 China

Through natural gas exploration in the Changling Fault Depression,abundant natural gas flows were obtained and high-quality source rocks were also *** on bulk analyses,organic matter abundance,organic matter type and thermal maturity of the source rocks were studied *** the same time,gas gener-ating intensity and gas generating quantity were quantitatively analyzed by using basin modeling *** results indicated that gas source rocks of the Shahezi Formation are characterized by abundant organic matter and dark mudstone distributions and high-over thermal *** possess high gas generating intensity with the biggest value surpassing 500×108 m3/km2.and large gas generating quantity,accounting from 74.40% of the total *** Yingcheng Formation has good gas-source rocks with moderate dark mudstone and relatively high organic *** has type-Ⅲ organic matter and low-over thermal *** gas generating intensity is moderate,between 2.×108 and 60×108 m3/*** gas generating quantity is 13.63% of the total *** Huoshiling Formation has relatively good source rocks with limited dark mudstone and low organic *** has type-Ⅲ kerogen and over-thermal *** gas generating quantity is 7.10% of the total *** Denglouku Formation has poor-gas source rocks,and is characterized by undeveloped dark mudstone and low organic matter *** has type-Ⅲ organic matter and low-high thermal *** gases in the Changling Fault Depression mainly originated from the Shahezi Formation,and secondarily from the Yingcheng *** contribution of the Huoshiling Formation gas source rocks is relatively small.

关键词： the Changling Fault Depression dark mudstone the Shahezi Formation hydrocarbon basin modeling

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油砂沥青分离技术研究进展

化工进展 2018年第9期37卷 3337-3345页

作者：郝俊辉田原宇张金弘乔英云车远军中国石油大学(华东)重质油国家重点实验室山东青岛266580

油砂作为一种储量丰富的非常规石油资源,越来越受到世界各国的广泛关注。对于油砂的加工利用,其前提就是油砂沥青的分离,因此对其技术的研究十分必要。本文首先介绍了油砂的组成及分类,然后着重对几种主要油砂分离技术(热水洗法、有机... 详细信息

油砂作为一种储量丰富的非常规石油资源,越来越受到世界各国的广泛关注。对于油砂的加工利用,其前提就是油砂沥青的分离,因此对其技术的研究十分必要。本文首先介绍了油砂的组成及分类,然后着重对几种主要油砂分离技术(热水洗法、有机溶剂萃取法、超临界流体萃取法、超声波辅助萃取法、离子液体萃取法和热解干馏法)的优缺点进行了汇总,并详细分析了它们各自的分离流程。其中,热水洗法、有机溶剂萃取法和热解干馏法是目前研究相对成熟的3种方法,而其他方法虽然分离效果相对高,但是对工艺条件和设备的要求较高,导致较高的投资和运行成本,因此还需要对这些油砂沥青分离工艺进行更加深入的研究,以满足工业化应用的要求。最后,对油砂沥青分离技术的发展前景进行了展望。

关键词：油砂热水洗溶剂萃取超临界流体萃取超声辅助萃取离子液体萃取热解油砂沥青