黏土膨胀储层伤害数值模拟研究

黄波; 徐建平; 蒋官澄; 王巧智; 苏延辉; 白相双

doi:10.3969/j.issn.1001-5620.2018.04.023

黏土膨胀储层伤害数值模拟研究

doi: 10.3969/j.issn.1001-5620.2018.04.023

1. 中海油能源发展股份有限公司工程技术分公司, 天津 300450;
2. 中国石油大学(北京)石油工程学院, 北京 102249;
3. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
4. 中国石油吉林油田钻井工艺研究院, 吉林松原 138000

基金项目:

国家科技重大专项（2017ZX05009-003、2016ZX05022-001-001-001、2016ZX05020-004、2016ZX05040-001-002）、国家自然科学基金面上项目（51474231）、国家自然科学基金创新群体（51521063）、国家自然科学基金青年科学基金项目（5160420）。

详细信息

作者简介:
黄波,高级工程师,1974年生,研究领域为油气井增产增注、提高采收率技术等。电话(022)66907301;E-mail:huangbo@cnooc.com.cn。

通讯作者:
蒋官澄,博士,二级教授,1966年生,研究领域为油田化学、储层保护等。E-mail:jgc5786@126.com

中图分类号: TE258
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出版历程
- 收稿日期: 2018-02-25
- 刊出日期: 2018-07-30

Numerical Simulation of Formation Damage by Clay Swelling

1. CNOOC EnerTech-Drilling & Production Co., Tianjin 300450;
2. School of Petroleum Engineering, China University of Petroleum, Beijing 102249;
3. State Key Laboratory of Oil and Gas Resource and Prospecting, China University of Petroleum, Beijing 102249;
4. Research Institute of Drilling Engineering, PetroChina Jilin Oil and Gas Field Company, Songyuan Jilin 138000

摘要

摘要: 在钻、完井或注水过程中，水基工作液的引入可能导致储层中黏土矿物膨胀而造成储层伤害。关于黏土膨胀储层伤害的研究较多，而对其时间空间变化规律的数值研究相对较少。基于渗透水化和水分子的菲克扩散建立了黏土膨胀储层伤害的数学模型，模拟了井筒周围储层无因次渗透率的时空演变特征，并由此计算了其表皮系数随时间的变化情况。结果表明，黏土膨胀伤害具有早期迅速增加、中晚期缓慢增加直至停止的特点，主要的损害量由早期贡献。储层某点的渗透率降低程度有限，但伤害在空间上的延伸范围较远，可以达到几米的量级，造成明显的伤害效果。总结来看，基于简化的数学模型，定量模拟了井筒周围黏土膨胀伤害的空间分布特征与其随时间变化特点，实现了单因素储层伤害的时空动态模拟，对矿场实践有一定的参考价值。
- 黏土膨胀 /
- 储层伤害 /
- 钻井液 /
- 完井液 /
- 时空模拟 /
- 数学模型
Abstract: In drilling, well completion or water injection operations, clays in formation rocks may swell when in contact with water base fluids, causing formation damage. Many studies have been conducted on formation damage caused by clay swelling, the numerical studies on the changing pattern of swelling with time and in space are scarcely seen. In our laboratory studies, a mathematical model has been established based on osmotic hydration of clay and the Fick diffusion of water molecules. Using this model, the changing pattern of the non-dimensional permeability of rocks around a wellbore with time and space was simulated, and the change of skin factor with time was calculated. It was demonstrated that the swelling of swelling has the characteristics of fast increase in the early stage, and slow increase to increase ceasing in the middle and late stages, meaning that formation damage is mainly contributed by the early swelling. At a certain point in the reservoir, the permeability impairment may be small, the formation damage is spatially extended, far from its origin, several meters, for instance, causing remarkable damage to the permeability of reservoir formations. To sum up, this study, based on simplified mathematic model, quantitatively simulated the spatial characteristics of the swelling of clays around a wellbore, and the swelling pattern of the clays with time, realizing the space-time dynamic simulation of single-factor controlled formation damage. The studies shed light on field engineering practices.
- Clay swelling /
- Formation damage /
- Drilling fluid /
- Completion fluid /
- Space-time simulation /
- Mathematic model

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参考文献(20)

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