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| 水平钻探取心用改性海泡石水基钻井液的室内研究 |
| Laboratory Study of Modified Sepiolite Water-Based Drilling Fluid in Long-Distance Horizontal Directional Drilling Engineering |
| 投稿时间：2024-01-30 修订日期：2024-04-05 |
| DOI： |
| 中文关键词: 水平钻井 海泡石 流变性能 API静滤失量 水基钻井液 |
| 英文关键词: horizontal directional drilling sepiolite rheology API static filtration loss water-based drilling fluid |
| 基金项目:湖南省创新型省份建设科技重大专项（项目编号：2019GK1012）；湖南省自然科学基金面上项目（项目编号：2022JJ30256） |
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| 中文摘要: |
| 在地质环境复杂的长距离水平定向钻探工程中，通过快速取心以获取深地远海复杂地质信息的岩芯完整性的控制技术、岩芯高效输送是目前的技术难题。基于水基钻井液的设计和应用以解决此类问题，目前受到广泛关注。通过建立化学改性海泡石与水基钻井液之间的构效关系，研究如何帮助解决水平钻井工程取心的技术难题。采用傅立叶红外光谱（FTIR）和广角X射线衍射（WAXD）表征了改性海泡石的化学结构。改性海泡石的微结构采用透射电镜（TEM）进行了表征。以改性海泡石制备三组水基钻井液样品，分别为WDF-01、WDF-02和WDF-03；以未改性海泡石制备WDF-00钻井液样品以作比较。对所制备钻井液的流变性、API滤失性等基本性能进行了实验室表征。通过化学改性，海泡石的层状结构更为有序，改善了海泡石在水相中的分散性，从而提升了钻井液的流变性。此外，改性海泡石基钻井液良好的滤失造壁性，使得钻井液表现出良好的润滑性和滤饼的低摩擦性，能满足水平钻探工程取心的应用要求。 |
| 英文摘要: |
| In the long-distance horizontal directional drilling engineering with the complex geological environment, the technology of rapid coring has been applied to obtain the geological information. However, it is hard to achieve the integrity and efficient transportation in the process of rapid coring. A rapidly growing field of water-based drilling fluids has been developed to resolve these problems from the view point of the drilling fluids. This work contributes to establish a structure-property relationship between the chemical modification of sepiolite and the water-based drilling fluids. The chemical structure of the chemical modification of sepiolite is characterized by FTIR and WAXD. TEM is employed to describe the microstructure of the sepiolites. The chemical modification of sepiolite is used to prepare the water-based drilling fluids WDF-01, WDF-02 and WDF-03. The comparative case WDF-00 is prepared on basis of the raw sepiolite. The basic properties of the water-based drilling fluids, such as rheological properties and API filtrate loss volume, are studied in the laboratory. Through the chemical modification, the dispersion state of sepiolite in water is improved, which is helpful to produce better rheological properties for the water-based drilling fluids. Owing to the presence of lamellar structure in the raw sepiolite being improved by the chemical modification, the water-based drilling fluids on basis of the modified sepiolite possess good lubricity and low filter cake friction which are required by the horizontal directional drilling engineering. |
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