| 缝洞型油藏微观驱替规律可视化实验研究 |
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| 引用本文： | 孙瑞仪,付美龙,徐传奇,李雪娇.缝洞型油藏微观驱替规律可视化实验研究[J].新疆地质,2021(1):167-170. |
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| 作者姓名： | 孙瑞仪 付美龙 徐传奇 李雪娇 |
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| 作者单位： | 长江大学石油工程学院 |
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| 基金项目： | “十三五”国家科技重大专项“缝洞型碳酸盐岩油藏堵水潜力评价方法及选择型堵剂体系研究”(2016ZX05014-005-006)项目资助。 |
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| 摘 要： | 针对缝洞型油藏出水规律不明确的问题,结合塔河油田缝洞型油藏储集体特征设计制作了单向连通缝洞储集体与多向连通缝洞储集体两种可视化物理模型,并借助基于微观可视化技术的缝洞型油藏微观驱替可视化装置,从微观上探究了缝洞型油藏微观驱替规律。结果表明,裂缝中,水相主要“优宽”驱进,并会在水流优势通道形成后对非优势通道产生“屏蔽效应”。从驱替形态与效果来看,水驱油方式可分为“活塞式”驱替与“非活塞式”驱替两种。当裂缝中的水相进入大溶洞,一定条件下大溶洞内的油相可“逆流”进入裂缝,导致油水两相“卡断”、“互驱”。当水相进入大溶洞后,一般会先向洞底移动、汇聚,之后以“类活塞”的形式纵向驱替上方原油。驱替结束,剩余油除油膜外,还包括储集体顶部的楼顶油、大溶洞顶部未被完全驱出的洞顶油以及裂缝中的缝间油等。该研究对理解缝洞型油藏底水抬升过程、油藏出水规律以及指导油井堵水、剩余油挖潜等均有积极意义。
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| 关 键 词： | 缝洞型油藏 屏蔽效应 逆流 卡断 剩余油 |
Visualization of Water Yielding Mechanism of Oil Well Based on the Fracture-Cave Reservoir in Tahe Oilfield |
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| Sun Ruiyi,Fu Meilong,Xu Chuanqi,Li Xuejiao.Visualization of Water Yielding Mechanism of Oil Well Based on the Fracture-Cave Reservoir in Tahe Oilfield[J].Xinjiang Geology,2021(1):167-170. |
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| Authors: | Sun Ruiyi Fu Meilong Xu Chuanqi Li Xuejiao |
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| Institution: | (School of Petroleum Engineering,Yangtze University,Wuhan,Hubei,430100,China) |
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| Abstract: | Rule of seam hole type reservoirs,ambiguous problems,combined with the feature of seam hole type reservoir in tahe oilfield reservoir design made a one-way connecting seam hole reservoir and multidirectional connecting seam hole reservoir two visual physical model,and with the help of microscopic visualization technology based on seam hole type reservoir microscopic displacement visualization device,explores the gap on the micro hole type reservoir microscopic displacement rule.The results show that in the fracture,the water phase mainly drives into the fracture with"optimal width",and produces"shielding effect"to the non-dominant channel after the dominant channel is formed.In terms of displacement shape and effect,water displacement can be divided into"piston"displacement and"non-piston"displacement.At the same time,when the water phase in the fracture enters the large karst cave,the oil phase in the large karst cave can"counterflow"into the fracture under certain conditions,resulting in the"stuck fracture"and"mutual flooding"of the oil-water two phases.When the water phase enters a large karst cave,it generally moves to the bottom of the cave first,converges,and then displaces the upper crude oil longitudinally in a"piston-like"form.At the end of displacement,the remaining oil includes not only the oil film,but also the roof oil on the top of the reservoir,the roof oil on the top of the large karst cave that has not been completely driven out,and the interfracture oil in the cracks,etc.This study is of positive significance for understanding the bottom water lifting process and reservoir water outflow rule in fracture-vuggy reservoirs,as well as guiding the water plugging of oil Wells and the potential exploitation of remaining oil. |
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| Keywords: | Fracture-cave reservoir Shielding effect Reflux Disconnection Residual oil |
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