鞑靼斯坦共和国油田采用低矿化度技术提高陆源油藏注水效率的潜力

IF 0.8 Q3 ENGINEERING, PETROLEUM
Georesursy Pub Date : 2022-12-20 DOI:10.18599/grs.2022.4.7
Zalina R. Saptarova, Alexander A. Mamonov, S. Usmanov, A. Lutfullin, V. Sudakov, M. Shipaeva, A. Shakirov
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引用次数: 0

摘要

本文以鞑靼斯坦共和国油田土连系、波布里科夫系和泥盆系陆源油藏为例,综述了目前相关的提高采收率方法之一——低矿化度水驱(LSW)。综述的第一部分介绍了该方法的关键过程,如粘土颗粒的膨胀迁移和润湿性改变,以及解释这些过程的机制,包括阳离子交换、多组分离子交换、双电层膨胀等。反过来,他们的理解有助于识别主要因素,这些因素在现场的存在或不存在使我们能够对LSW应用进行初步评估。主要因素有:粘土颗粒的存在,地层水中Ca2+和Mg2+离子含量高,以及多价离子的存在,地层渗透率低,油粘度降低,油中酸性组分,特别是碱性组分含量增加,从而形成疏水型的初始岩石润湿性。然后,给出了该方法在其他领域的应用实例,并简要介绍了实验室研究的结果,包括接触角的测量和岩心驱油实验。根据鞑靼斯坦共和国几个油田的地质和现场资料进行了初步筛选,确定了候选油田,并对该地区的LSW应用做出了初步结论。在初步筛选阶段确定的储层有利因素包括地层温度低、地层水矿化度高、二价阳离子含量高、pH值有可能从目前的微酸性转向碱性,以及极性油组分含量增加。此外,土连和Bobrikovian层的储层以粘土颗粒的存在为特征,泥盆纪储层的特点是油粘度降低,同时油基数增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Potential for improving the efficiency of terrigenous oil deposits waterflooding with the use of low salinity technology at fields of the Tatarstan Republic
This article is devoted to the review of one of the currently relevant methods of enhanced oil recovery – low-salinity waterflooding (LSW) – on the example of terrigenous Tulian, Bobrikovian and Devonian reservoirs of the Tatarstan Republic fields. The first part of review contains information about the key processes underlying this method, such as swelling and migration of clay particles and wettability alteration, as well as the mechanisms that explain these processes, which include cation exchange, multicomponent ion exchange, electric double layer expansion, etc. Their understanding, in turn, contributes to the identification of the main factors, the presence or absence of which at the field allows us to give a preliminary assessment of LSW application. There are main factors: the presence of clay particles, a significant content of Ca2+ and Mg2+ ions, as well as multivalent ions in formation water, low formation permeability, reduced oil viscosity, an increased content of acidic and especially basic components in oil and, as a result, a hydrophobic type of initial rock wettability. Then, examples of using the method in other fields are given and the results of laboratory studies, including the measurement of the contact angle, core flooding experiments, are briefly highlighted. A preliminary screening is carried out on the basis of geological and field data from several fields of Tatarstan Republic, candidate fields are identified and a preliminary conclusion about LSW application in this region is made. The positive factors for the reservoirs under consideration, identified at the preliminary screening stage, include low formation temperature, high salinity of formation water with a significant content of divalent cations and the potential to shift the pH level from the current slightly acidic level towards increased alkalinity, and an increased content of polar oil components. In addition, the reservoirs of the Tulian and Bobrikovian horizons are characterized by the presence of clay particles, and the Devonian reservoir are characterized by a reduced oil viscosity coupled with an increased oil base number.
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来源期刊
Georesursy
Georesursy ENGINEERING, PETROLEUM-
CiteScore
1.50
自引率
25.00%
发文量
49
审稿时长
16 weeks
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