Analysis of various parameters in soaking: a case study of Permian Fengcheng Formation in Mahu Sag, Junggar Basin, China

IF 1.827 Q2 Earth and Planetary Sciences

Arabian Journal of Geosciences Pub Date : 2025-02-08 DOI:10.1007/s12517-025-12206-4

Liu Yang, Wang Junming, Zhang Wenquan, Li Zhaolei, Zha Zhengtang

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Abstract

During the shale oil development process in the Mahu Sag, there is a significant difference in the initial crude oil production after soaking, which is considered to be related to the soak. Therefore, 7 wells in the research area were selected to study the relationship between various parameters in soaking and initial crude oil production under similar control engineering parameters. Selecting parameters with strong correlation to establish a multiple linear regression equation with initial crude oil production and predict the initial crude oil production of Well M57. The results indicate that the initial oil production is negatively correlated with pressure drop rate, porosity, and soaking time. Establishing a multiple linear regression equation as Y = − 127.1823A—5.20913B + 1.35608C + 73.81473 and predicting initial oil production of well M57 is 16.58 m³/d. Based on the relationship between pressure drop rate and soak time, the pressure curve is divided into four phases. The reasonable soak time is between the lower and upper limits. The favorable soak time for initial crude oil production is between the II and III stage. This study fills the gap in predicting the initial production of shale crude oil in Mahu Sag and can provide guidance for the efficient development of shale oil in the region in the later stage.

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浸水各参数分析——以准噶尔盆地马湖凹陷二叠系丰城组为例

在马湖凹陷页岩油开发过程中，浸泡后的初始原油产量存在显著差异，认为这与浸泡有关。因此，选取研究区7口井，研究在相似控制工程参数下，浸泡各参数与初始原油产量的关系。选取相关性强的参数，建立与初始原油产量的多元线性回归方程，对M57井的初始原油产量进行预测。结果表明，初始产油量与压降速率、孔隙度和浸泡时间呈负相关。建立多元线性回归方程Y =−127.1823A-5.20913B + 1.35608C + 73.81473，预测M57井初始产油量为16.58 m3/d。根据压降速率与浸泡时间的关系，将压力曲线划分为4个阶段。合理的浸泡时间在上限值和下限值之间。初始原油生产的有利浸泡时间在II期和III期之间。该研究填补了马湖凹陷页岩原油初期产量预测的空白，可为该地区后期页岩油高效开发提供指导。

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来源期刊

Arabian Journal of Geosciences GEOSCIENCES, MULTIDISCIPLINARY-

自引率

0.00%

发文量

1587

审稿时长

6.7 months

期刊介绍： The Arabian Journal of Geosciences is the official journal of the Saudi Society for Geosciences and publishes peer-reviewed original and review articles on the entire range of Earth Science themes, focused on, but not limited to, those that have regional significance to the Middle East and the Euro-Mediterranean Zone. Key topics therefore include; geology, hydrogeology, earth system science, petroleum sciences, geophysics, seismology and crustal structures, tectonics, sedimentology, palaeontology, metamorphic and igneous petrology, natural hazards, environmental sciences and sustainable development, geoarchaeology, geomorphology, paleo-environment studies, oceanography, atmospheric sciences, GIS and remote sensing, geodesy, mineralogy, volcanology, geochemistry and metallogenesis.