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| 爆炸载荷对水泥试样损伤破坏规律研究 |
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林英松1,2,蒋金宝2,朱天玉2,阮新芳2,丁雁生1,付英军3,孙丰成2,王莉2
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(1.中国科学院力学研究所，北京100081;2.中国石油大学石油工程学院，山东东营257061;3.中国海洋石油研究中心，北京100027)
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| 摘要: |
| 从实验和数值模拟两方面对爆炸载荷对水泥试样的损伤破坏进行了研究。首先,在水中利用爆炸产生的爆炸 冲击波对水泥试样进行损伤破坏，模拟“层内爆炸”采油技术中激波使岩石损伤开裂的现象;然后,利用波动力学理 论，对激波在实验条件下对水泥试样的损伤破坏进行了数值模拟。结果表明，在冲击载荷作用下，水泥试样的损伤 破坏可分为压实破坏、压实损伤、拉伸损伤、拉伸破坏4个区域，在压实损伤区水泥试样也具有较好的渗透性。数值 模拟可以用来确定各种裂纹形成的应力条件，并可通过预制剖面上的裂纹分布来预测水泥试样内部裂纹分布的基 本规律。 |
| 关键词: 爆炸载荷 水泥试样 实验研究 数值模拟 损伤破坏 层内爆炸 |
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| 基金项目:中国石油化工股份有限公司资助项目(P03051) |
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| Research of cement sample's damage and fracture by exploding load |
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LIN Ying-song1,2,JIANG Jin-bao2,ZHU Tian-yu2,RUAN Xin-fang2,DING Yan-sheng1,FU Ying-jun3,SUN Feng-cheng2,WANG Li2
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(1. Institute of Mechanics in Chinese Academy of Sciences, Beijing 100081, China;2. College of Petroleum Engineering in China University of Petroleum , Dongying 257061, Shandong Province，China ;3. Research Center in China National Offshore Oil Corporation，Beijing 100027, China)
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| Abstract: |
| The cement samples damage and fracture by exploding load was studied by experiment and numerical simulation method. First, the phenomenon of the rock damage and fracture by shock wave of exploding in fractures was simulated through the experiment of exploding on the surface of the cement sample in deep water. Second, the damage and fracture mechanism was numerically simulated by wave mechanics under the experimental condition. The results show that there exist four damage zones on the sample, which are compacted fracture zone, compacted damage zone, tensile damage zone and tensile fracture zone. And the cement sample has good permeability in compacted damage zone. And the stress conditions of all kinds fractures forming can be determined by numerical simulation. The basic distribution law of inner fracture of the cement sample can be predicted by fractures distribution on prefab section. |
| Key words: exploding load cement sample experimental study numerical simulation damage and fracture exploding in fracture |
