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| 天然裂缝储层压裂时套压大幅度增加的新解释 | |
| 引用本文： | 罗天雨,郑克祥,刘洪,江琴.天然裂缝储层压裂时套压大幅度增加的新解释[J].断块油气田,2009,16(5):63-65. |
| 作者姓名： | 罗天雨 郑克祥 刘洪 江琴 |
| 作者单位： | 1. 新疆油田公司采油工艺研究院,新疆,克拉玛依,834000 2. 重庆科技学院,重庆,400042 3. 辽河油田公司高升采油厂,辽宁,盘锦,124125 |
| 基金项目： | 国家自然科学基金项目"油气藏水力压裂多裂缝造缝机理及配套工艺技术研究" |
| 摘 要： | 通常对裂缝性储层进行水力压裂改造时,套压在加砂过程中大幅度增加,当它们增加到一定程度时就无法继续加砂.一种解释是,在压裂过程中阻力多裂缝的不断开启,条数增加,净压力不断增加,裂缝吃砂宽度狭窄,无法接受高砂比.研究认为,延伸压力的增加源于:1)高滤失导致砂浆浓缩加快;2)周边或局部砂堵部位增多后造成憋压;3)闭合应力增加;4)砂浆流动阻力增加;5)裂缝条数有限增加.搞清楚这种机理有利于采取针对性措施提高改造水平. |
| 关 键 词： | 早期砂堵 滤失多裂缝 憋压 套压增加 |
A new explanation on the mechanism of substantial increase of casing pressure during fracturing of naturally fractured reservoir |
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| Luo Tianyu,Zheng Kexiang,Liu Hong,Jiang Qin.A new explanation on the mechanism of substantial increase of casing pressure during fracturing of naturally fractured reservoir[J].Fault-Block Oil & Gas Field,2009,16(5):63-65. | |
| Authors: | Luo Tianyu Zheng Kexiang Liu Hong Jiang Qin |
| Affiliation: | Luo Tianyu1 Zheng Kexiang1 Liu Hong2 Jiang Qin3 (1.Research Institute of Oil Production Technology,Xinjiang Oilfield Company,CNPC,Karamay 834000,China,2.Chongqing University of Science , Technology,Chongqing 400042,3.Gaosheng Oil Production Plant,Liaohe Oilfield Company,Panjin 124125,China) |
| Abstract: | Usually,casing pressure will increase greatly in the process of adding sand during the hydraulic fracture of fractured reservoir. The adding sand can not be continuously conducted when the casing pressure increases to a certain extent. Aiming at this situation,there is an explanation that the continuous opening of multiple fractures with high resistance,increase of fracture number and net pressure cause that the width of holding-sand fracture is too narrow to accept the high concentration of proppant during... |
| Keywords: | early sand plug multiple fractures for leak-off pressure holding increasing of casing pressure |
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