| 水平井中多条裂缝同步扩展时裂缝竞争机制 |
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| 引用本文： | 程 万,蒋国盛,周治东,魏子俊,张 宇,王炳红,赵 林.水平井中多条裂缝同步扩展时裂缝竞争机制[J].岩土力学,2018,39(12):4448-4456. |
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| 作者姓名： | 程 万 蒋国盛 周治东 魏子俊 张 宇 王炳红 赵 林 |
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| 作者单位： | 1. 中国地质大学（武汉） 工程学院，湖北 武汉 430047；
2. 中国石油化工股份有限公司河南油田分公司石油工程技术研究院，河南 南阳 473000 |
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| 基金项目： | 湖北省自然科学基金（No.2018CFB378）；国家自然科学青年科学基金项目（No.41802195） |
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| 摘 要： | 水平井中多条水力裂缝间的应力干扰行为，造成了压裂液排量的非均匀分配，影响了水力裂缝的几何形态。采用边界元法研究岩体在压裂液作用下的变形程度，以幂律流体泊肃叶平板流动方程来研究水力裂缝内部的压裂液流场，考虑了多条裂缝间应力干扰和压裂液流量分配，建立了流-固耦合的水平井多条水力裂缝同步扩展模型。模型可模拟水平井多条水力裂缝几何形态、应力干扰情况和压裂液排量的分配情况，可解释水力裂缝之间的竞争机制。多条裂缝同步扩展时，压裂液排量并非均等地分配到各个裂缝之中，进入到内部裂缝的压裂液流量最小，内部裂缝宽度最小；内部的水力裂缝增长一定长度后，停止增长，并且在应力干扰下逐渐闭合。
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| 关 键 词： | 水力压裂 应力干扰 同步扩展 流-固耦合 |
| 收稿时间： | 2017-10-23 |
Fracture competition of simultaneous propagation of multiple hydraulic fractures in a horizontal well |
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| CHENG Wan,JIANG Guo-sheng,ZHOU Zhi-dong,WEI Zi-jun,ZHANG Yu,WANG Bing-hong,ZHAO Lin.Fracture competition of simultaneous propagation of multiple hydraulic fractures in a horizontal well[J].Rock and Soil Mechanics,2018,39(12):4448-4456. |
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| Authors: | CHENG Wan JIANG Guo-sheng ZHOU Zhi-dong WEI Zi-jun ZHANG Yu WANG Bing-hong ZHAO Lin |
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| Institution: | 1. Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430047, China;
2. Research Institute of Petroleum Engineering Technology of Henan Oilfield, SINOPEC, Nanyang, Henan, 473000, China |
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| Abstract: | The stress interaction among multiple fractures in a horizontal well causes non-uniform distribution of fracturing fluid, and then affects the geometry of hydraulic fracture. Boundary element method is used to determine the rock deformation under the hydraulic pressure of fracturing fluid, and the Poiseuille flow of the power-law fluid is conducted to calculate the flow field of fracturing fluid inside the hydraulic fracture. Considering the stress interaction and fluid distribution, a fluid-solid coupled model is proposed to illustrate the hydraulic fracture propagation in multiple simultaneous fracturing of a horizontal well. This model can simulate the fracture geometry and stress interaction, and this model figures out the mechanism of fracturing fluid distribution and fracture competition. During the process of multiple fracture propagation, the fracturing fluid is not equally distributed into each fracture. The interior fracture with the lowest width contains the least amount of fracturing fluid . The interior fracture stops growth and closes after reaching certain length due to stress interaction. |
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| Keywords: | hydraulic fracturing stress interaction simultaneous propagation fluid-solid coupling |
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