As the demand for hydrocarbons increases, the search frontiers for petroleum and natural gas deposits keep being pushed towards unconventional terrains. An example of an unconventional terrain where oil and gas deposits can be found is the high temperature and high pressure (HTHP) environment. While HTHP wells can hold a wealth of resources, they are difficult and expensive to complete. One area of difficulty is in optimizing the rheology of muds used for drilling wells in these environments. As a result, a plethora of laboratory, field and modelling studies have been conducted on mud rheology under HTHP conditions. Despite the huge number of studies on this subject, bibliometric analysis indicates that in the last five decades, there is no comprehensive, up-to-date review on mud rheology under HTHP conditions. This work is therefore an attempt to curate the laboratory, field and modelling studies on mud rheology in HTHP conditions with a view to highlighting recent advances on the subject and identifying grey areas where more studies should be directed. The contributions of the current study for which novelty is claimed include: a comprehensive curation and critique of HTHP mud rheological models, laboratory studies, HTHP mud cost analysis and a detailing of learnings from specific field experiences on HTHP mud rheology. A conscious effort was made to present the review in a straightforward manner with enough theoretical background so that readers in and outside of the drilling community can benefit. Although the authors have striven for completeness, it is essentially an impracticable undertaking to be exhaustive. Results from the review indicate that while the relationship between mud rheology and temperature and pressure in HTHP wells remains complex, additives with high thermal and rheological stability are available and can be used in HTHP drilling. The real essence of this work is not to create an encyclopaedia of mud rheology experiments but to facilitate the understanding of the behaviour of various mud types under HTHP conditions. Better still, it could serve either as a useful reference for the academic community or as an added preparatory guide and checklist to wellbore drillers planning to drill in HTHP environments.

随着对碳氢化合物需求的增加，石油和天然气矿床的搜索前沿不断被推向非常规领域。可以发现石油和天然气沉积物的非常规地形的一个例子是高温高压 (HTHP) 环境。虽然 HTHP 井可以拥有丰富的资源，但完成它们既困难又昂贵。难点之一是优化用于在这些环境中钻井的泥浆的流变性。因此，对高温高压条件下的泥浆流变学进行了大量的实验室、现场和模型研究。尽管对这一主题进行了大量研究，但文献计量分析表明，在过去的 50 年中，没有对 HTHP 条件下泥浆流变学进行全面、最新的审查。因此，这项工作是对 HTHP 条件下泥浆流变学的实验室、现场和模型研究的一种尝试，以突出该主题的最新进展并确定应该进行更多研究的灰色区域。声称具有新颖性的当前研究的贡献包括：对 HTHP 泥浆流变模型、实验室研究、HTHP 泥浆成本分析以及从 HTHP 泥浆流变学的特定现场经验中学到的详细信息的综合整理和评论。有意识地努力以具有足够理论背景的直截了当的方式呈现评论，以便钻井界内外的读者都能受益。尽管作者力求完整性，但要详尽无遗本质上是不切实际的。审查结果表明，虽然泥浆流变学与高温高压井的温度和压力之间的关系仍然复杂，但具有高热稳定性和流变稳定性的添加剂可用于高温高压钻井。这项工作的真正本质不是创建泥浆流变学实验的百科全书，而是促进对高温高压条件下各种泥浆类型行为的理解。更好的是，它既可以作为学术界的有用参考，也可以作为计划在 HTHP 环境中钻探的井眼钻探者的附加准备指南和清单。这项工作的真正本质不是创建泥浆流变学实验的百科全书，而是促进对高温高压条件下各种泥浆类型行为的理解。更好的是，它既可以作为学术界的有用参考，也可以作为计划在 HTHP 环境中钻探的井眼钻探者的附加准备指南和清单。这项工作的真正本质不是创建泥浆流变学实验的百科全书，而是促进对高温高压条件下各种泥浆类型行为的理解。更好的是，它既可以作为学术界的有用参考，也可以作为计划在 HTHP 环境中钻探的井眼钻探者的附加准备指南和清单。