| 郭欣宇,杜先利.源断层向浅层供油气时空匹配评价及其应用[J].矿产勘查,2026,2(2):345-362 |
| 源断层向浅层供油气时空匹配评价及其应用 |
| A comprehensive evaluation method for the oil and gas migration capacity of follow-source type faults to shallow layers and its application |
| 投稿时间：2025-04-24 |
| DOI：10.20008/j.kckc.202602012 |
| 中文关键词: 源断层 浅层 供油气能力 时空匹配 |
| 英文关键词: follow-source type faults shallow layers oil and gas migration capacity time-space matching |
| 基金项目:本文受松辽盆地野外标准剖面建设项目(DQYT-1201002-2024-JS-3)资助。 |
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| 中文摘要: |
| 为了研究含油气盆地源断层处浅层油气富集特征，本文在源断层向浅层供油气模式及其能力影响因素研究的基础上，通过源断层本身运移油气能力、源岩供油气能力和源断层运移油气穿过泥岩盖层能力，二者结合构建了一套源断层向浅层供油气能力的综合评价方法，综合评价海拉尔盆地贝尔凹陷霍多莫尔地区 H1断层向大二段供油气能力；其次求取断裂的活动速率，将古活动速率较大的部位判定为油源断裂疏导部位，预测霍多莫尔地区油源断裂不同部位伴生裂缝的发育程度，判断油源断裂在南一段源内的疏导部位。最后通过整合源断层运移油气能力、源岩供油气能力及泥岩盖层穿透能力，构建了定量评价模型。结果表明:(1)H1断层向大二段供油气能力高值区集中于测点 2~5，其次为测点 1、6、7，与油气显示分布高度吻合，证实方法可行性。(2)基于断裂活动速率(>6 m/Ma)判定油源断裂输导优势区，南一段内主要分布于 F1断裂测点 3~19、F2断裂测点 21~23及 F3断裂测点 24~25。(3)油源断裂向大二段输导时间为南一段排烃期、断裂活动期及盖层封闭期的重合时段，F1断裂测点 8~14、17输导时间较长，F1断裂测点 18~19及 F2断裂测点 21~23输导时间较短。 |
| 英文摘要: |
| In order to study the shallow oil and gas enrichment characteristics of follow-source type faults inpetroliferous basins, based on the study of the oil and gas supply mode and its influencing factors of follow-sourcetype faults to shallow layers, a comprehensive evaluation method of oil and gas supply capacity of follow-sourcetype faults to shallow layers is constructed by combining the oil and gas migration capacity of follow-source type faults themselves, the oil and gas supply capacity of source rocks and the oil and gas migration capacity of follow-source type faults through mudstone caprocks, and the oil and gas supply capacity of H1 fault to the second sectionof Damoguaihe Formation in Huoduomoer area, Beier Sag, Hailaer Basin is comprehensively evaluated. Secondly,the activity rate of the fault is calculated, and the part with a large ancient activity rate is determined as the dredgingpart of the oil follow-source type faults. The development degree of the associated fractures in different parts of theoil follow-source type faults in the Huoduomoer area is predicted, and the dredging part of the oil follow-sourcetype faults in the first section of the Nantun Formation is judged. Finally, a quantitative evaluation model is con-structed by integrating the oil and gas migration ability of follow-source type faults, the oil and gas supply ability ofsource rocks and the penetration ability of mudstone caprocks. The results show that: (1) The high value area of oiland gas supply capacity of H1 fault to the second section of Damoguaihe Formation is concentrated in the measuringpoint 2-5, followed by the measuring point 1, 6 and 7, which is highly consistent with the distribution of oil and gasshows, confirming the feasibility of the method. (2) Based on the fracture activity rate (>6 m/Ma), the dominant areaof oil source fracture transport is determined. The first section of Nantun Formation is mainly distributed in F1 frac-ture measuring point 3-19, F2 fracture measuring point 21-23 and F3 fracture measuring point 24-25. (3) Thetransporting time of the oil follow-source type faults to the second section of Damoguaihe Formation is the coinci-dence period of the hydrocarbon expulsion period, the fault activity period and the caprock sealing period. The trans-porting time of F1 fault measuring point 8-14, 17 is longer, and the transporting time of F1 fault measuring point18-19 and F2 fault measuring point 21-23 is shorter. |
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