强底水砂岩水驱曲线评价新方法
重庆科技大学, 石油与天然气工程学院, 重庆 401331
| 摘 要： | 强底水砂岩油藏是具有丰富天然能量的一类油藏，在油藏的开发过程中，水驱能量是能量的主要来源。与此同时，水驱的过程中也有许多问题出现，尤其是见水早和底水水窜的问题。通过文献调研以及该油藏的地质特征，结合对前人对该地区的研究，发现对该类油藏进行水驱分析十分有必要。本文主要分析了四种经典水驱曲线以及fw-Np型、WOR-Np型水驱曲线，对单井进行拟合，利用相关系数以及计算值和实际值拟合效果综合评价，通过计算，在水驱特征曲线中，对直线段进行拟合，R2的差别并不是很大，仅凭相关系数R2并不能较好的判断出水驱曲线的适应性，因此，将实际与计算数据进行拟合，综合来判断适合生产井的水驱曲线。大多数井符合甲型水驱曲线，部分井对丙型、丁型以及WOR-Np型水驱曲线有较好的适应性。在油藏开发过程中，利用适用性较好的水驱曲线，对开发制度进行调整，对油藏的含水率和累产水量进行预测，利于油藏的开发。 |
| 关 键 词： | 水驱曲线; 强底水油藏; 夹层; 开发效果 |
| DOI： | 10.57237/j.res.2024.01.002 |
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收稿日期: 2023-12-13
接受日期: 2024-02-01
在线出版日期: 2024-02-04
A New Method for Evaluating the Water Drive Curve of Sandstone with Strong Bottom Water
School of Petroleum Engineering, Chongqing University of Science and Technology, Chongqing 401331, China
| Abstract: | Strong bottom water sandstone reservoirs are a type of reservoir with abundant natural energy. During the development process of reservoirs, water drive energy is the main source of energy. At the same time, there are also many problems that arise during water flooding, especially the problems of early water breakthrough and bottom water breakthrough. Through literature research and geological characteristics of the reservoir, combined with previous research on the region, it was found that water drive analysis of this type of reservoir is very necessary. This article mainly analyzes four classic water drive curves, as well as FW-Np and WOR-Np water drive curves, and fits single wells. The fitting effect is comprehensively evaluated using correlation coefficients, calculated values, and actual values. Through calculation, in the water drive characteristic curve, the difference in R2 is not significant when fitting the straight line segment. Relying solely on the correlation coefficient R2 cannot determine the adaptability of the water drive curve well. Therefore, the actual and calculated data are fitted, To comprehensively determine the suitable water drive curve for production wells. Most wells conform to Type A water drive curves, while some wells have good adaptability to Type C, Type D, and WOR-Np water drive curves. In the process of reservoir development, using water drive curves with good applicability, adjusting the development system, predicting the water content and cumulative water production of the reservoir, is beneficial for the development of the reservoir. |
| Keywords: | Water Drive Curve; Strong Bottom Water Reservoir; Interlayer; Development Effect |
基金
| 1. | 哈法亚油田Sadi碳酸岩油藏压裂前置微乳液渗吸增油规律研究 (基金号: YKJCX2320126) |
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