| 青西油田下沟组构造裂缝发育特征与分布预测 |
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| 引用本文： | 孙维凤.青西油田下沟组构造裂缝发育特征与分布预测[J].地质与勘探,2014,50(6):1181-1189. |
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| 作者姓名： | 孙维凤 |
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| 作者单位： | 中国石油勘探开发研究院，北京；提高石油采收率国家重点实验室，北京； 中国石油大学(北京)非常规天然气研究院，北京 |
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| 基金项目： | 中国石油重大科技专项《玉门探区非常规油气勘探开发目标优选》（编号：2012E-3303）资助 |
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| 摘 要： | 青西油田下白垩统下沟组低孔低渗泥云岩是该区主要的储集层,其中构造裂缝是油气渗流的重要通道和储集空间。本次研究首先基于岩心及成像测井资料分析和构造裂缝的发育特征,然后在岩石力学参数测试的基础上,考虑断层对构造裂缝形成的影响,采用三维有限元法对青西油田主要裂缝形成期的古构造应力场进行数值模拟,并预测出青西油田下白垩统下沟组构造裂缝的分布规律。预测结果表明:在青西油田的东部和西部存在两个构造裂缝发育区,尤其是在窿10井和柳102井等附近,构造裂缝较为发育,而中部地区构造裂缝相对不发育。本次研究可为该区下沟组构造裂缝评价和油气勘探提供新的地质依据和指导。
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| 关 键 词： | 构造裂缝 预测 低孔低渗泥云岩储层 下白垩统下沟组 青西油田 |
| 收稿时间： | 2014/4/14 0:00:00 |
| 修稿时间： | 2014/8/21 0:00:00 |
Characteristics and distribution prediction of structural fissures in the Lower Cretaceous Xiagou Formation in the Qingxi oilfield |
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| Sun Wei-feng.Characteristics and distribution prediction of structural fissures in the Lower Cretaceous Xiagou Formation in the Qingxi oilfield[J].Geology and Prospecting,2014,50(6):1181-1189. |
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| Authors: | Sun Wei-feng |
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| Institution: | Research Institute of Petroleum Exploration & Development, Beijing; State Key Laboratory of Enhanced Oil Recovery, Beijing; College of Unconventional Natural Gas, China University of Petroleum, Beijing |
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| Abstract: | The Lower Cretaceous Xiagou low porosity and low permeability argillaceous dolomite formation is the main reservoir in the Qingxi oilfield, where structural fissures serve as important migration pathways and accumulation spaces. This work analyzed the characteristics of these fissures based on cores and imaging logging data. Then considering the influence of faults on the fracture formation, a 3D finite element method was applied to simulate the paleostress field when fissures formed and predict the distribution of fissures in the Xiagou Formation on the basis of rock mechanical tests. The modeling results show that the zones with concentrating fissures are distributed in the east and west, respectively, especially around the wells Long10 and Liu102. While the middle potion of the oilfield hosts relatively few fissures. These study results can provide new geological evidence for the fissure assessment and hydrocarbon exploration in the Xiagou Formation of the oilfield. |
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| Keywords: | structural fissure prediction low porosity and low permeability argillaceous dolomite Lower Cretaceous Xiagou Formation Qingxi Oilfield |
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