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Modeling of multiphase flow in low permeability porous media:Effect of wettability and pore structure properties

Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1127-1139页

作者： Xiangjie Qin Yuxuan Xia Juncheng Qiao Jiaheng Chen jianhui zeng Jianchao Cai National Key Laboratory of Petroleum Resources and Engineering China University of PetroleumBeijing102249China Research Institute of Petroleum Exploration and Development Beijing10083China

Multiphase flow in low permeability porous media is involved in numerous energy and environmental ***,a complete description of this process is challenging due to the limited modeling scale and the effects of complex pore structures and *** address this issue,based on the digital rock of low permeability sandstone,a direct numerical simulation is performed considering the interphase drag and boundary slip to clarify the microscopic water-oil displacement *** addition,a dual-porosity pore network model(PNM)is constructed to obtain the water-oil relative permeability of the *** displacement efficiency as a recovery process is assessed under different wetting and pore structure *** show that microscopic displacement mechanisms explain the corresponding macroscopic relative *** injected water breaks through the outlet earlier with a large mass flow,while thick oil films exist in rough hydrophobic surfaces and poorly connected *** variation of water-oil relative permeability is significant,and residual oil saturation is high in the oil-wet *** flooding is extensive,and the residual oil is trapped in complex pore networks for hydrophilic pore surfaces;thus,water relative permeability is lower in the water-wet *** the displacement efficiency is the worst in mixed-wetting systems for poor water *** negatively correlates with invading oil volume fraction due to strong capillary resistance,and a large microporosity corresponds to low residual oil *** work provides insights into the water-oil flow from different modeling perspectives and helps to optimize the development plan for enhanced recovery.

关键词： Low permeability porous media Water-oil flow Wettability Pore structures Dual porosity pore network model(PNM) Free surface model

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可视化三维物理模拟实验技术在油气成藏研究中的应用——以塔里木盆地顺北地区S53-2井为例

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石油实验地质 2024年第5期46卷 1110-1122页

作者：隆辉曾溅辉刘亚洲杨冀宁耿锋中国石油大学(北京)地球科学学院北京102249 中国石油大学(北京)油气资源与工程全国重点实验室北京102249

油气成藏物理模拟实验技术是研究油气运移聚集过程的重要技术手段,可以在实验室条件下,实现油气运移成藏动态化、可视化、定量化研究。但传统二维物理模拟实验技术存在细微现象缺乏、含油性测量难、观察面单一等不足。针对这些问题,同... 详细信息

油气成藏物理模拟实验技术是研究油气运移聚集过程的重要技术手段,可以在实验室条件下,实现油气运移成藏动态化、可视化、定量化研究。但传统二维物理模拟实验技术存在细微现象缺乏、含油性测量难、观察面单一等不足。针对这些问题,同时为了揭示超深层油气成藏特征,研发了一种可视化三维油气成藏物理模拟实验技术,并成功模拟了塔里木盆地顺北地区S53-2井的成藏过程。明确了超深断控油气藏油气成藏影响因素;揭示了断层和缝网系统在断控油气藏形成过程中扮演双重角色,其既作为油气运移通道,也是重要的油气储集空间;提出了主断层、缝网及缝网一侧的地堑断层是油气的优势聚集区;建立了“浮力垂向运移、先核部后破碎带、先主干后地堑、缝网输储一体、主次断裂各异”的油气成藏模式。新技术使实验过程更加清晰,实验参数更加准确,实验现象更加立体,可为实验室油气成藏模拟工作提供新的支撑。

关键词：断控油气藏油气成藏物理模拟塔里木盆地

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Effects of temperature and surfactants on naphthalene and phenanthrene sorption by soil

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Journal of Environmental Sciences 2009年第5期21卷 667-674页

作者： ZHANG Jinghuan zeng jianhui HE Mengchang State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing 100875 China Faculty of Natural Resource & Information Technology China University of Petroleum Beijing 102200 China

Adsorption experiments were carried out to investigate the sorption behaviors of naphthalene and phenanthrene in six different soils and to determine the effects of temperature, linear alkylbenzene sulfonate （LAS） and cetylrimethyl ammonium bromide （CTAB） on sorption. The results show that for a given sorbent phenanthrene exhibited greater nonlinear and stronger sorption than naphthalene. There was a strong negative correlation for the Koc values with organic carbon content （foc）. The increase of temperature was not favorable to sorption. Sorption decreased along with the increasing aqueous LAS concentration from 0 to 1000 mg/L. At low CTAB concentration （〈 100 mg/L）, the adsorption increased as CTAB hemimicelles formed on the soil surface. At high concentration, CTAB decreased the adsorption by occupying active hydrophobic adsorption sites and solubilization of naphthalene and phenanthrene.

关键词： naphthalene phenanthrene sorption soil temperature linear alkylbenzene sulfonate cetylrimethyl ammonium bromide

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冻融条件下藻结皮覆盖对土壤结构的影响

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水土保持学报 2024年第2期38卷 157-164页

作者：钟志强曹文华马波曾建辉张秀梅西北农林科技大学水土保持研究所陕西杨凌712100 中国科学院水利部水土保持研究所陕西杨凌712100 水利部水土保持监测中心北京100053

[目的]为研究生物结皮覆盖和冻融作用对土壤结构的影响。[方法]以黄土高原北部风沙土为研究对象,采用室内模拟冻融的方法,利用田口方法分析不同冻融次数、冻融前土壤初始含水量和生物结皮(藻结皮)盖度对土壤结构特征的影响。[结果](1)... 详细信息

[目的]为研究生物结皮覆盖和冻融作用对土壤结构的影响。[方法]以黄土高原北部风沙土为研究对象,采用室内模拟冻融的方法,利用田口方法分析不同冻融次数、冻融前土壤初始含水量和生物结皮(藻结皮)盖度对土壤结构特征的影响。[结果](1)通过正交试验获取的土壤结构指数(I GSS)为75.57~96.57,信噪比(S/N)为37.55~39.70 dB,通过田口方法确定的最佳因子组合为15次冻融循环、15%初始含水量、80%藻结皮覆盖度,其预测结果为I GSS=98.09,S/N=39.89 dB。(2)I GSS与冻融次数、初始含水量、藻结皮盖度均呈正相关关系,各因子对土壤结构指数的主效应表现为初始含水量>冻融次数>藻结皮覆盖度;各因子对土壤结构指数变化的贡献率为初始含水量(52.17%)>冻融次数(31.95%)>藻结皮覆盖度(2.12%)。(3)土壤结构指数的变化来自于冻融过程中土壤水分的散失和孔隙扩张,藻结皮覆盖可以减缓冻融过程中水分的散失,从而减缓I GSS变化。[结论]研究使用正交试验对冻融条件下藻结皮覆盖对土壤结构的影响进行探讨,研究结果可为复杂条件下的土壤冻融过程研究提供一定的理论参考。

关键词：黄土高原土壤结构冻融模拟生物结皮田口方法

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Hydrodynamic Evolution and Hydrocarbon Accumulation in the Dabashan Foreland Thrust Belt,China

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 912-923页

作者： zeng jianhui GUO Kai TIAN Kun XU Tianwu State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Faculty of Geosciences China University of PetroleumChangping Sinopec Zhongyuan Oilfield Exploration and Development Science Institute

There are two plays in the Dabashan foreland tectonic belt： the upper and the lower plays. The lower play experienced one sedimentary hydrodynamic stage, two burial hydrodynamic stages, two tectonic hydrodynamic stages and two infiltration hydrodynamic stages from the Sinian to the Cenozoic, while the upper play had one sedimentary hydrodynamic stage, one burial hydrodynamic stage, two tectonic hydrodynamic stages and one infiltration hydrodynamic stage from the Permian to the Cenozoic. Extensive flows of both sedimentary water, including hydrocarbons, and deep mantle fluid occurred in the Chengkou faults during collision orogeny in the Middle-Late Triassic Indosinian orogeny, and fluid flow was complicated during intracontinental orogeny in the Middle-Late Jurassic. In addition to these movements, infiltration and movement of meteoric water took place in the Chengkou faults, whereas in the covering-strata decollement tectonic belt, extensive sedimentary water flow （including hydrocarbons） occurred mainly in the Zhenba and Pingba faults. During the stage of rapid uplift and exhumation from the Cretaceous to the Cenozoic, the fluid flow was characterized mainly by infiltration of meteoric water and gravity-induced flow caused by altitude difference, whereas sedimentary water flow caused by tectonic processes was relatively less significant. Sedimentary water flow was more significant to the lower play in hydrocarbon migration and accumulation during collision orogeny in the Middle-Late Triassic Indosinian orogeny, but its influence is relatively slight on the upper play. On one hand, hydrodynamics during intracontinental orogeny in the Middle-Late Jurassic adjusted, reformed or oven destroyed oil reservoirs in the lower play; on the other hand, it drove large amounts of hydrocarbons to migrate laterally and vertically and is favorable for hydrocarbon accumulation. Infiltration hydrodynamics mainly adjusted and destroyed oil reservoirs from the Cretaceous to the Cenoz

关键词： hydrodynamic evolution and its characteristics hydrocarbon migration accumulation and preservation the Dabashan foreland tectonic belt

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Effects of sediment characteristics on the sediment transport capacity of overland flow

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International Soil and Water Conservation Research 2023年第1期11卷 75-85页

作者： Chenguang Liu Suhua Fu Zhanbin Li Zeyu Zhang jianhui zeng Institute of Soil and Water Conservation Northwest A&F UniversityYanglingShaanxi712100PR China State Key Laboratory of SoilErosion and Dryland Farming on the Loess Plateau Institute of Soil and Water ConservationChinese Academy of Sciences and Ministry of Water ResourceYanglingShaanxi712100PR China Beijing Key Laboratory of Environmental Remote Sensing and Digital City Faculty of Geographical ScienceBejing Normal UniversityBejing100875PR China

The transport of sediments is a crucial part of soil *** calculating the sediment transport capacity is key to the construction of soil erosion process *** on Tc has focused mainly on the dynamics of a single particle of sediment and hydraulic *** have been few studies of the impact of soil aggregates on the *** clarify how sediment characteristics,including those for single particles and aggregates,affect the Tc of overland flow with no raindrop import,flume experiments were implemented at slope gradients varying from 5.24%to 26.80%and flow discharges ranging from 0.68 to 5.41×10^(-3)m^(2)s^(-1).The experimental materials were five typical soils in *** results indicated that the correlation between the measured Tc and sediment mechanical composition indexes of the five soils was indistinctive in this *** sediment settling velocity with aggregates has a significant corre-lation with the measured *** equations,including for the sediment settling velocity with aggregatesωud75,were established to calculate the *** empirical equation that includedωud75,slope gradient and unit discharge performed greatly in predicting Tc(R^(2)=0.93,NSE=0.90).ωud75 can effectively improve the calculation accuracy of *** new equation including flow and sediment properties obtained through dimensional analysis performed well in predicting Tc(R^(2)=0.99,NSE=0.91),and the calculation accuracy was better than that of the empirical model derived in this *** findings indicate that the sediment settling velocity is an important variable in the equation for predicting sediment transport capacity of overland flow.

关键词： Sediment transport capacity Soil mechanical composition Soil aggregates Sediment settling velocity Dimensional analysis

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Origin of Paleofluids in Dabashan Foreland Thrust Belt:Geochemicai Evidence of ^(13)C,^(18)O and ^(87)Sr/^(86)Sr in Veins and Host Rocks

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Acta Geologica Sinica(English Edition) 2010年第5期84卷 1239-1255页

作者： zeng jianhui XU Tianwu SUN Zhanqiang ZHANG Yongwang State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Faculty of Geosciences China University of Petroleum Changping Beijing 102249 Sinopec Zhongyuan Oilfield Exploration and Development Science Institute Puyang Henan 457001 China

In the last ten years, with important discoveries from oil and gas exploration in the Dabashan foreland depression belt in the borderland between Shanxi and Sichuan provinces, the relationship between the formation and evolution of, and hydrocarbon accumulation in, this foreland thrust belt from the viewpoint of basin and oil and gas exploration has been studied. At the same time, there has been little research on the origin of fluids within the belt. Based on geochemical system analysis including Z values denoting salinity and research on δ13C, δ18O and S7Sr/S6Sr isotopes in the host rocks and veins, the origin of paleofluids in the foreland thrust belt is considered. There are four principal kinds of paleofluid, including deep mantle-derived, sedimentary, mixed and meteoric. For the deep mantle-derived fluid, the δ13C is generally less than -5.0‰PDB, δ18O less than -10.0‰PDB, Z value less than 110 and 87Sr/86Sr less than 0.70600; the sedimentary fluid is mainly marine carbonate- derived, with the δ13C generally more than -2.0‰PDB, 18δO less than -10.0‰PDB, Z value more than 120 and STSr/S6Sr ranging from 0.70800 to 0.71000; the mixed fluid consists mainly of marine carbonate fluid （including possibly a little mantle-derived fluid or meteoric water）, with the j13C generally ranging from -2.0‰ to -8.0‰PDB, δ18O from -10.0‰ to -18.0‰ PDB, Z value from 105 to 120 and 87Sr/86Sr from 0.70800 to 0.71000; the atmospheric fluid consists mainly of meteoric water, with the δ13C generally ranging from 0.0‰ to -10.0‰PDB, δ18O less than -8.0%rPDB, Z value less than 110 and 87Sr/86Sr more than 0.71000. The Chengkou fault belt encompasses the most complex origins, including all four types of paleofluid; the Zhenba and Pingba fault belts and stable areas contain a simple paleofluid mainly of sedimentary type; the Jimingsi fault belt contains mainly sedimentary and mixed fluids, both consisting of sedimentary fluid and meteoric water. Jurassic rocks of the foreland depression belt

关键词： paleofluid origin δ13C δ18O and 87Sr/S6Sr isotopic geochemistry Dabashan forelandthrust belt

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渤海湾盆地埕岛东部新近纪火山活动及其油气地质意义

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现代地质 2024年第2期38卷 312-321页

作者：张在振曾溅辉张本华王志伟刘金华于世娜武群虎王艳珍中国石油大学(北京)地球科学学院北京102249 中石化胜利油田分公司海洋采油厂山东东营257237 西南石油大学地球科学与技术学院四川成都610500

渤海湾盆地中部埕岛地区火山多期活动,对储层发育、油气运移及成藏等方面起到了一定的影响。目前研究主要集中在中生界火山岩储层上,对新近纪火山活动及油气成藏的影响认识不足,制约着埕岛东部油气的进一步勘探。本文综合区内应用测井... 详细信息

渤海湾盆地中部埕岛地区火山多期活动,对储层发育、油气运移及成藏等方面起到了一定的影响。目前研究主要集中在中生界火山岩储层上,对新近纪火山活动及油气成藏的影响认识不足,制约着埕岛东部油气的进一步勘探。本文综合区内应用测井、录井及地震资料,阐释了火山岩岩性、岩相及活动性等特征,并进一步探讨了火山活动对油气成藏过程的影响。研究区火山岩主要为灰黑色玄武岩,地震剖面上火山锥的形态较为清晰,平面上呈现串珠状或链状分布。结合地震相及钻井揭示岩电特征,将新近系底部火山岩岩相划分为火山通道相、爆发相、溢流相、火山沉积相和侵入相5种类型。火山活动始于新近纪早期,持续3~5 Ma即消亡,形成局部发育的角度不整合,并导致沉积环境由湖泊三角洲向辫状河的转变。研究区在火山活动和火山岩体作用下,重塑了油气输导及侧向遮挡条件,形成多种油气藏类型,与火山活动相关的岩性及火山岩体遮挡型油气藏是下一步勘探的重要方向。

关键词：渤海湾盆地埕岛油田新近纪火山活动油气成藏

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Petroleum Migration Characteristics in the Northeastern Part of the Baiyun Depression,Pearl River Mouth Basin,South China Sea

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 208-231页

作者： zeng jianhui WANG Chen GUO Shuai YU Yixin ZHANG Zhongtao YANG Haizhang ZHAO Zhao SUN Rui State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing 102249China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China CNOOC Research Institute Co. Ltd.Beijing 100028China Shenzhen Branch of China National Offshore Oil Corporation Ltd. ShenzhenGuangdong 518054China

This paper investigates the origin and migration characteristics of petroleum in the northeastern part of the Baiyun Depression,Pearl River Mouth Basin(PRMB).The discovered petroleum in the study area is mainly located in the Lower Zhujiang Member(N_(1)z^(2))and mainly originated from the Enping Formation source rocks in the eastern *** faults(vertical migration)and N_(1)z^(2)sandstones(lateral migration)acted as the petroleum migration *** fault activities in the Dongsha event controlled the episodic petroleum *** in the fault zones provided effective conduits,and overpressure was the driving *** vertical migration could not cross the fault zones *** petroleum injection areas in the carrier beds were the contact zones of petroleum-migration faults and carrier *** lateral migration was steady-state migration,and buoyancy was the driving *** migration pathways in the carrier beds were controlled by the structural *** petroleum migration in the study area could be divided into two parts:vertical migration along the fractures in the fault zones and lateral migration through preferential petroleum migration pathways(PPMPs)in the carrier *** petroleum migration behaviors,including migrating direction,driving force,and migration pattern,in the faults and sandstone carrier beds were quite *** study provides a typical example for comprehending secondary migration processes and has great importance for determining future exploration targets in the deep-water area of the PRMB.

关键词： secondary petroleum migration episodic petroleum migration preferential petroleum migration pathways(PPMPs) Baiyun Depression Pearl River Mouth Basin

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Structural Characteristics and its Significances on Hydrocarbon Accumulation in the Yunkai Low Uplift,Pearl River Mouth Basin

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Acta Geologica Sinica(English Edition) 2021年第1期95卷 21-29页

作者： YU Yixin ZHANG Tianlong ZHANG Zhongtao ZHANG Gongcheng zeng jianhui YANG Haizhang ZHAO Zhao LIANG Weiwei State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing 102249China College of Geosciences China University of PetroleumBeijing 102249China Research Institute Shaanxi Yanchang Petroleum(Group)Co.Ltd.Xi'an 710075China CNOOC China Limited Shenzhen BranchShenzhen 518054China CNOOC Research Institute Co. Ltd.Beijing 100028China

The Yunkai low uplift with low exploration degree is close to the Baiyun sag,and has hydrocarbon exploration potential in the deepwater area of the Pearl River Mouth *** on seismic and drilling data,balanced profiles and growth strata,this paper mainly discusses geological structures and formation processes of the Yunkai low uplift,and also analyzes the characteristics of fault system and their influence on hydrocarbon migration and *** EWtrending basement faults divide the Yunkai low uplift into two parts,*** southern sector and the northern *** northern sector is a relatively wide and gentle uplift,while the southern sector is composed of two secondary half-grabens with faulting in the south and overlapping in the *** Yunkai low uplift experienced three major formation stages,including the rapid uplifting stage during the deposition period of the Eocene Wenchang Formation,the slow uplifting stage during the deposition period of the Late Eocene-Middle Miocene Enping-Hanjiang formations,and the whole burial stage from the Middle Miocene to *** extensional faults in the Yunkai low uplift and its adjacent areas strike mainly along the NW,NWW and near-EW ***,the strikes of faults present a clockwise rotation from the deep to the shallow *** to effects of faults on hydrocarbon accumulation the faults in the Yunkai low uplift and its adjacent areas can be divided into trap-controlled faults and source-controlled *** trap-controlled faults control trap development and can effectively seal oil and *** source-controlled faults connect directly source rocks and reservoirs,which are highly active during the rifting stage and weakly active since the *** activity features of the source-controlled faults is beneficial to migration of the early crude oil from the Baiyun sag to the high part of the Yunkai low uplift,but is not good for migration of the late natural *** the Yunkai low upli

关键词： fault activity hydrocarbon accumulation Yunkai low Pearl River Mouth Basin

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