致密砂岩油藏测井响应特征及有利区评价

doi:10.3969/j.issn.1006-6535.2023.05.005

摘要/Abstract

摘要： 针对姬塬油田K39井区砂岩油藏测井响应特征复杂多变、有效储层识别较为困难等问题,基于测井原理和数据,建立储层参数测井解释模型,明确研究区测井相模式,对孔隙度、含油饱和度、渗透率等测井响应特征参数进行聚类分析,建立了致密砂岩储层流动单元识别标准。应用该测井模型重新解释油层91 m/8层,油水同层108 m/13层,含油水层77 m/7层,新增石油地质储量23.8×10⁴t。应用致密砂岩储层流动单元识别标准,明确了有利区分布,其中,Ⅰ、Ⅱ类流动单元石油地质储量共计202.5×10⁴t,在实际应用中效果较好。该研究成果丰富了鄂尔多斯盆地有效储层识别方法及有利区优选评价,对该地区致密油藏开发调整和井位部署具有参考价值。

关键词: 致密砂岩, 测井响应特征, 有利区评价, 解释模型, 鄂尔多斯盆地

Abstract: To address the difficult problem of complex and variable well logging response characteristics of sandstone reservoirs in Well K39 Area of Jiyuan Oilfield and the difficulty of identifying effective reservoirs, the well logging principles and methods were applied to analyze well logging interpretation models of effective reservoir parameters, clarify well logging phase patterns in the study area, innovate and carry out cluster analysis of well logging response characteristics parameters such as porosity, oil content saturation and permeability, and establish four types of flow unit identification criteria for dense sandstone reservoirs. The study results show that in Well K39 area, the established well logging model is used to reinterpret 8 oil layers, totaling 91 m, 13 oil-water layers, totaling 108 m, and 7 water with oil layers, totaling 77 m, releasing a total of 23.8×10⁴t of reserves, which is effective in practical application, and evaluating the favorable Class I and II flowing unit reserves of Jiyuan Oilfield totaling 202.5×10⁴t. The research results enrich the study of effective reservoir identification and favorable zone preference in Ordos Basin, and have reference value for development adjustment and well deployment of tight reservoir in Ordos Basin.

Key words: tight sandstone, well logging response, favorable zone evaluation, interpretation model, Ordos Basin

中图分类号:

TE122.2

赵辉, 齐怀彦, 王凯, 蔡涛, 孟利华, 周兵. 致密砂岩油藏测井响应特征及有利区评价[J]. 特种油气藏, 2023, 30(5): 35-41.

Zhao Hui, Qi Huaiyan, Wang Kai, Cai Tao, Meng Lihua, Zhou Bing. Characteristics of Well Logging Response and Evaluation of Favorable Zones in Tight Sandstone Reservoirs[J]. Special Oil & Gas Reservoirs, 2023, 30(5): 35-41.

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