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首页> 美国卫生研究院文献>Polymers >A New Method of Plugging the Fracture to Enhance Oil Production for Fractured Oil Reservoir using Gel Particles and the HPAM/Cr3+ System
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A New Method of Plugging the Fracture to Enhance Oil Production for Fractured Oil Reservoir using Gel Particles and the HPAM/Cr3+ System

机译：利用凝胶颗粒和HPAM / Cr3 +系统堵塞裂缝以提高裂缝型油藏采油量的新方法

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摘要

Due to the strong heterogeneity between the fracture and the matrix in fractured oil reservoirs, injected water is mainly moved forward along the fracture, which results in poor water flooding. Therefore, it is necessary to reduce the water cut and increase oil production by using the conformance control technology. So far, gel particles and partially hydrolyzed polyacrylamide (HPAM)/Cr3+ gel are the most common applications due to their better suitability and low price. However, either of the two alone can only reduce the conductivity of the fracture to a certain extent, which leads to a poor effect. Therefore, to efficiently plug the fracture to enhance oil recovery, a combination of gel particles and the HPAM/Cr3+ system is used by laboratory tests according to their respective advantages. The first step is that the gel particles can compactly and uniformly cover the entire fracture and then the fracture channel is transformed into the gel particles media. This process can enhance the oil recovery to 18.5%. The second step is that a suitable HPAM/Cr3+ system based on the permeability of the gel particles media is injected in the fractured core. Thus, the fracture can be completely plugged and the oil in the matrix of the fractured core can be displaced by water flooding. This process can enhance oil recovery to 10.5%. During the whole process, the oil recovery is increased to 29% by this method. The results show that this principle can provide a new method for the sustainable and efficient development of fractured oil reservoirs.
机译：由于裂缝性油藏中裂缝与基质之间的强烈非均质性，注入的水主要沿着裂缝向前移动，从而导致水驱不良。因此，有必要通过采用一致性控制技术来减少含水量并增加产油量。到目前为止，凝胶颗粒和部分水解的聚丙烯酰胺（HPAM）/ Cr 3 + 凝胶由于具有更好的适用性和较低的价格而成为最常见的应用。但是，两者中的任何一个都只能在一定程度上降低裂缝的电导率，从而导致效果不佳。因此，为了有效地堵塞裂缝以提高采收率，实验室测试根据其各自的优势，将凝胶颗粒和HPAM / Cr 3 + 系统组合使用。第一步是凝胶颗粒可以紧密均匀地覆盖整个裂缝，然后将裂缝通道转化为凝胶颗粒介质。此过程可将石油采收率提高到18.5％。第二步是将合适的基于凝胶颗粒介质渗透性的HPAM / Cr 3 + 系统注入到破裂的岩心中。因此，裂缝可以被完全堵塞，并且裂缝的岩心基质中的油可以通过注水来驱替。此过程可将石油采收率提高到10.5％。在整个过程中，通过这种方法，采油率提高到29％。结果表明，该原理可为裂缝性油藏的可持续高效开发提供一种新方法。

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