Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent
Oil-based drilling fluid is currently widely utilized when drilling shale, in which the oleophilic nano-plugging agent is the major component for wellbore strengthening. However, there have been few effective and straightforward evaluation methods for the nano-plugging agent. In this study, an artif...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/8/3559 |
| _version_ | 1827745140061503488 |
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| author | Feng Dai Pingya Luo Chunlin Wu Rui Wang Yingmin Liu Weian Huang |
| author_facet | Feng Dai Pingya Luo Chunlin Wu Rui Wang Yingmin Liu Weian Huang |
| author_sort | Feng Dai |
| collection | DOAJ |
| description | Oil-based drilling fluid is currently widely utilized when drilling shale, in which the oleophilic nano-plugging agent is the major component for wellbore strengthening. However, there have been few effective and straightforward evaluation methods for the nano-plugging agent. In this study, an artificial filter cake was created to simulate the microfissure of shale formation, and the performance of the nano-plugging agent was assessed using the fluid-loss reduction rate as the index. The filter cake was made from compound crystal weights and a high molecular weight polymer, and a nano-plugging agent matching the formation pore structures was selected. The performance of three plugging agents with varying particle sizes (ultrafine CaCO<sub>3</sub>, emulsified modified rubber MORLF, ULIA nano-plugging agent) was compared. Moreover, the validity of the evaluation process was confirmed, and the underlying plugging mechanism was investigated. The proposed technique can produce an artificial filter cake with a constant thickness of 3 × 10<sup>−3</sup> m and a permeability in the range of 10<sup>−18</sup> to 10<sup>−19</sup> m<sup>2</sup>, and the assessment approach is consistent, precise and easy to use. This work may provide a guideline for evaluating oleophilic nano-plugging agents in the laboratory and field applications. |
| first_indexed | 2024-03-11T05:02:55Z |
| format | Article |
| id | doaj.art-3cec32575a4143a98f93272844754a95 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T05:02:55Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-3cec32575a4143a98f93272844754a952023-11-17T19:06:53ZengMDPI AGEnergies1996-10732023-04-01168355910.3390/en16083559Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging AgentFeng Dai0Pingya Luo1Chunlin Wu2Rui Wang3Yingmin Liu4Weian Huang5School of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Petroleum Engineering, Southwest Petroleum University, Chengdu 610500, ChinaExploration and Development Department, Sichuan Changning Natural Gas Development Co., Ltd., Chengdu 610051, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaExploration and Development Department, Sichuan Changning Natural Gas Development Co., Ltd., Chengdu 610051, ChinaSchool of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, ChinaOil-based drilling fluid is currently widely utilized when drilling shale, in which the oleophilic nano-plugging agent is the major component for wellbore strengthening. However, there have been few effective and straightforward evaluation methods for the nano-plugging agent. In this study, an artificial filter cake was created to simulate the microfissure of shale formation, and the performance of the nano-plugging agent was assessed using the fluid-loss reduction rate as the index. The filter cake was made from compound crystal weights and a high molecular weight polymer, and a nano-plugging agent matching the formation pore structures was selected. The performance of three plugging agents with varying particle sizes (ultrafine CaCO<sub>3</sub>, emulsified modified rubber MORLF, ULIA nano-plugging agent) was compared. Moreover, the validity of the evaluation process was confirmed, and the underlying plugging mechanism was investigated. The proposed technique can produce an artificial filter cake with a constant thickness of 3 × 10<sup>−3</sup> m and a permeability in the range of 10<sup>−18</sup> to 10<sup>−19</sup> m<sup>2</sup>, and the assessment approach is consistent, precise and easy to use. This work may provide a guideline for evaluating oleophilic nano-plugging agents in the laboratory and field applications.https://www.mdpi.com/1996-1073/16/8/3559oleophilic nano-plugging agentwellbore stabilitysealing evaluationartificial filter cakecomplex barite |
| spellingShingle | Feng Dai Pingya Luo Chunlin Wu Rui Wang Yingmin Liu Weian Huang Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent Energies oleophilic nano-plugging agent wellbore stability sealing evaluation artificial filter cake complex barite |
| title | Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent |
| title_full | Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent |
| title_fullStr | Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent |
| title_full_unstemmed | Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent |
| title_short | Study on Artificial Filter Cake Evaluation Method of Oleophilic Nano-Plugging Agent |
| title_sort | study on artificial filter cake evaluation method of oleophilic nano plugging agent |
| topic | oleophilic nano-plugging agent wellbore stability sealing evaluation artificial filter cake complex barite |
| url | https://www.mdpi.com/1996-1073/16/8/3559 |
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