Characteristics of Well Logging Response and Evaluation of Favorable Zones in Tight Sandstone Reservoirs

doi:10.3969/j.issn.1006-6535.2023.05.005

Abstract

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

CLC Number:

TE122.2

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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