钻井/完井液

研究评估二氧化碳对 CCS 井钻井液性能的影响

本文旨在弥补二氧化碳储存井钻探领域存在的许多知识空白，这项任务预计涉及处理二氧化碳流入钻井液。

数值井控水力学模型的一些关键概念的示意图
数值井控水力学模型的一些关键概念的示意图概述。
来源：SPE 217711。

钻探二氧化碳 (CO 2 ) 储存井是一项预计涉及处理钻井液中CO 2流入的任务。在完整论文中描述的研究中，对与 CO 2混合的钻井液在相关压力和温度下的密度、流变性、相包络、水合物形成和钻井液稳定性进行了实验表征。基于这些实验和经过验证的热力学模型描述，开发了钻井液/CO 2混合物特性的局部模型，并将其集成到现有的钻井软件套件中。

增强型井控软件的要求

基于井筒内钻井液/气体相互作用的复杂且经过验证的模型的井控评估软件在规划钻井作业中发挥着重要作用。该软件还可用于评估井涌循环和重新控制井的策略。

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Drilling/completion fluids

Study Assesses Effects of Carbon Dioxide on Drilling-Fluid Performance in CCS Wells

This paper aims to close some of the many knowledge gaps that exist in the field of drilling CO2 storage wells, a task that is expected to involve handling an influx of CO2 into the drilling fluid.

Schematic overview of some key concepts of a numerical well control hydraulics model
Schematic overview of some key concepts of a numerical well control hydraulics model.
Source: SPE 217711.

Drilling carbon-dioxide (CO2) storage wells is a task expected to involve handling an influx of CO2 into the drilling fluid. In the study described in the complete paper, experimental characterization of density, rheology, phase envelope, hydrate formation, and drilling-fluid stability are performed on drilling fluids mixed with CO2 for relevant pressures and temperatures. Based on these experiments and verified thermodynamic model descriptions, local models for properties of drilling-fluid/CO2 mixtures were developed and integrated into an existing drilling software suite.

Requirements for Enhanced Well-Control Software

Well-control-evaluation software based on sophisticated and verified models of the drilling-fluid/gas interaction in the wellbore plays an important role in planning drilling operations. The software also can be used to evaluate the strategy for circulating out a kick and regaining control of the well.

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