水层窜槽井水淹模式识别及措施潜力预测

The Study on Water Flooded Pattern Identification and Measure Potential Prediction of Water Channeling Wells

唐慧敏 王琴 孟令强 张骞 张芨强 于倩男

TANG huimin WANG qin MENG lingqiang ZHANG qian ZHANG jiqiang YU qiannan

中海石油（中国）有限公司海南分公司，海南海口　570311 广东石油化工学院机电工程学院，广东茂名　525000

CNOOC (China) Co., Ltd. Hainan Branch, Haikou, Hainan 570311, China School of Mechanical and Electrical Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000, China

油田开发至今，逐渐出现新区新层投产即高含水的非正常生产井，搞清其非正常出水原因和类型，将会对其进行有针对性的卡控水提供重要依据。针对海上油田大斜度多层合采井无法进行动态监测以认识各层产出的问题，以生产动态数据为研究基础，从水源、见水时间出发，结合机理模型，建立水淹模式识别图版，分析不同因素对曲线特征影响；基于贝克莱水驱油理论，建立多层合采井考虑层间流体性质、驱油效率差异的无因次采液指数随含水变化的修正关系，预测水层窜槽井卡控水后含水。利用实际生产数据对新理论进行验证，证实该理论合理、可靠，从而可实现水层窜槽井水淹模式快速识别及卡控水潜力分析，为油田精细挖潜奠定坚实基础。

Up to now, a new kind of abnormal production wells of high water cut when put into production of the new layer in the new area has been exploded gradually. Finding out the causes and types of abnormal water outflow will provide important basis for targeted water control. Aiming at the problem that the highly deviated multi-layer wells in offshore oilfield cannot be dynamically monitored to analysis the output of each layer, based on the production dynamic data, starting from the water source and water breakthrough time, combining with the mechanism model, the pattern recognition chart of water flooding is established, and the influence of different factors on the curve characteristics is analyzed. Based on Buckley-Leverett water flooding theory, the modified relationship of dimensionless fluid production index with water cut is established considering the difference of fluid properties and displacement efficiency between layers, to predict the water cut of changing layers. The new theory is verified by the actual production data, which proves that the theory is reasonable and reliable, so as to realize the rapid recognition of water flooded pattern and analysis of water control potential of channeling wells in water layer, and lays a solid foundation for further developing exploitation potential of oilfield.

“南海西部油田上产2000万方关键技术研究”—课题《南海西部在生产油气田提高采收率技术研究》（编号：CNOOC-KJ135ZDXM38ZJ01ZJ）

https://doi.org/10.3969/j.issn.1008-2336.2022.03.022