| 致密油藏自发静态渗吸实验及影响因素 |
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| 引用本文： | 石立华,薛颖,崔鹏兴,汪桐羽,侯玢池.致密油藏自发静态渗吸实验及影响因素[J].科学技术与工程,2023,23(29):12494-12503. |
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| 作者姓名： | 石立华 薛颖 崔鹏兴 汪桐羽 侯玢池 |
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| 作者单位： | 陕西延长石油集团有限责任公司研究院;西安思坦仪器股份有限公司 陕西 西安;;中国石油玉门油田分公司老君庙采油厂 |
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| 基金项目： | 陕西省自然科学“页岩油储层微-纳米孔喉系统量化表征及对可动流体赋存状态控制机理研究”(2022JQ-290)； |
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| 摘 要： | 自发渗吸对致密砂岩油藏的注水开发有着重要意义，理想情况下自发渗吸驱油效率可以达到50%以上，目前国内外学者对致密储层自发静态渗吸研究不够系统和深入，实验模型不能真实和全面地反映储层物性及流体对自发渗吸的影响规律。针对以上问题，设计制作了典型区块致密储层天然岩芯和人造岩芯，开展了致密储层多因素自发静态渗吸实验，系统研究了渗吸时间、岩芯长度、岩芯孔隙度、地层水矿化度、岩芯渗透率、初始含水饱和度、界面张力及润湿性对致密储层渗吸驱油效率和渗吸速度的影响程度，定量评价了不同因素下渗吸驱油效果的变化规律。结果表明，影响渗吸驱油的主要因素为润湿性、孔隙度、渗透率、界面张力，初始含水饱和度次之，岩芯长度及地层水矿化度对渗吸驱油效率的影响最弱，作用强度最小，研究结果对致密储层有效注水开发提供了实验和理论依据。
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| 关 键 词： | 致密油藏 自发渗吸 渗吸驱油效率 渗吸驱油速度 主控因素 |
| 收稿时间： | 2022/12/20 0:00:00 |
| 修稿时间： | 2023/9/26 0:00:00 |
Spontaneous static imbibition experiment of tight reservoir and its influencing factorsShi Lihua1,2 Xue Ying3 Cui Pengxing1 Zhu Zheng1 |
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| Shi Lihu,Xue Ying,Cui Piengxing,Wang Tongyu,Hou Fenchi.Spontaneous static imbibition experiment of tight reservoir and its influencing factorsShi Lihua1,2 Xue Ying3 Cui Pengxing1 Zhu Zheng1[J].Science Technology and Engineering,2023,23(29):12494-12503. |
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| Authors: | Shi Lihu Xue Ying Cui Piengxing Wang Tongyu Hou Fenchi |
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| Affiliation: | Research Institute of Yanchang Petroleum (Group) Co. LTD |
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| Abstract: | The imbibition is of great significance for the water injection development of tight reservoirs. Under ideal conditions, the oil displacement efficiency of spontaneous imbibition can reach more than 50%. At present, scholars at home and abroad do not study the spontaneous static imbibition of tight reservoirs systematically and deeply, leading to the unclear imbibition mechanism in tight reservoir rocks. Aiming at the above problems, natural cores of typical tight reservoirs were selected to simulate formation temperature and pressure, and spontaneous static imbibition experiments of tight reservoirs were carried out. The effects of core length, core porosity, formation water salinity, core permeability, initial water saturation, interfacial tension and wettability on imbibition displacement efficiency and imbibition speed of tight reservoirs were systematically studied, The variation rule and influence degree of imbibition displacement effect under different factors are evaluated quantitatively. The experimental results show that the main factors affecting imbibition displacement are wettability, core porosity, permeability, interfacial tension and initial water saturation, followed by core length and salinity. The effect of core length and salinity on imbibition displacement efficiency is the weakest and the action intensity is the smallest. The research results provide a certain theoretical and experimental basis for water injection development adjustment of tight reservoirs. |
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| Keywords: | tight reservoir spontaneous imbibition imbibition displacement efficiency Imbibition displacement velocity dominant factors |
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