| 鄂尔多斯盆地定边地区延长组长7_1储层构造裂缝分布预测 |
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| 引用本文： | 王金月.鄂尔多斯盆地定边地区延长组长7_1储层构造裂缝分布预测[J].地质与勘探,2016,52(5):966-973. |
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| 作者姓名： | 王金月 |
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| 作者单位： | 1. 中国矿业大学,资源与地球科学学院,江苏徐州 221116;2. 中国矿业大学,资源与地球科学学院,江苏徐州 221116;中国矿业大学,煤层气资源与成藏过程教育部重点实验室,江苏徐州 221008 |
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| 基金项目： | 中国博士后科学基金（编号：2015M581891）、江苏省博士后科研资助计划（编号：1501059A）和国家科技重大专项（编号：2016ZX05066）资助 |
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| 摘 要： | 研究构造裂缝系统的发育和分布规律对鄂尔多斯盆地定边地区上三叠统延长组低渗透砂岩油藏的勘探开发选区具有重要的实践意义。本次研究基于有限元对定边地区主要裂缝形成期进行古构造应力场数值模拟,以岩石综合破裂值为判定依据,对该区延长组长71储层构造裂缝的发育程度和分布规律进行预测。结果显示,该地区燕山期岩石破裂程度普遍较高,表明裂缝发育程度高且分布范围广;喜马拉雅期岩石破裂程度整体较低,并且裂缝发育区仅集中于研究区的西北部,少数分布于中北部。本次研究可为鄂尔多斯盆地定边地区低渗透油藏的勘探和有效开采提供地质依据和参考。
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| 关 键 词： | 构造裂缝 长71储层 定边地区 数值模拟 鄂尔多斯盆地 |
| 收稿时间： | 2016/3/20 0:00:00 |
| 修稿时间： | 2016/6/21 0:00:00 |
Quantitative prediction of tectonic fissure distribution in the Chang 71 reservoirs of the Yanchang Formation in the Dingbian area, Ordos basin |
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| Wang Jin-yue.Quantitative prediction of tectonic fissure distribution in the Chang 71 reservoirs of the Yanchang Formation in the Dingbian area, Ordos basin[J].Geology and Prospecting,2016,52(5):966-973. |
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| Authors: | Wang Jin-yue |
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| Institution: | School of Resources and Geoscience, China University of Mining and Technology, Xuzhou, Jiangsu; Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu |
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| Abstract: | Tectonic fissure distribution is important for the exploration and development of the low permeability sandstone reservoirs in Upper Triassic Yanchang Formation in the Dingbian area of Ordos basin. This work was based on numerical modeling of the paleotectonic stress field responsible for tectonic fissure generation in the Dingbian area using the finite element method. With the comprehensive fracture values as the criteria, the density and distribution of cracks in the reservoirs were predicted. The results show that the rocks the Yanshanian period generally have high degrees of fracturing, resulting in a larger density and a wide distribution of tectonic fissure. In contrast, the rocks of the Himalayan period generally have low degrees of fracturing, and their cracks are concentrated in the northwest, few in the middle-north of the study area. Both the modeling of the paleotectonic stress field and prediction of crack distribution in the research area are in agreement with the geological facts, which can provide guidance for the reasonable and effective exploitation of low-permeability reservoirs in the Dingbian area of Ordos basin. |
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| Keywords: | tectonic fracture Chang 71 reservoir Dingbian area numerical simulation Ordos basin |
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