|本期目录/Table of Contents|

[1]张健,王金意,荆铁亚,等.压裂液与煤岩相互作用实验研究[J].断块油气田,2020,27(01):131-136.[doi:10.6056/dkyqt202001027]
 ZHANG Jian,WANG Jinyi,JING Tieya,et al.Experimental study on interaction between fracturing fluids and coal rock[J].Fault-Block Oil and Gas Field,2020,27(01):131-136.[doi:10.6056/dkyqt202001027]
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压裂液与煤岩相互作用实验研究(PDF)
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《断块油气田》[ISSN:1005-8907/CN:41-1219/TE]

卷:
27
期数:
2020年01
页码:
131-136
栏目:
默认栏目
出版日期:
2020-01-25

文章信息/Info

Title:
Experimental study on interaction between fracturing fluids and coal rock
作者:
张健12王金意12荆铁亚12李四海3张国祥12
1.中国华能集团清洁能源技术研究院有限公司,北京 102209;2.二氧化碳捕集与处理北京市重点实验室,北京 102209;3.中国石油大学(北京)石油工程学院,北京 102249
Author(s):
ZHANG Jian12 WANG Jinyi12 JING Tieya12 LI Sihai3 ZHANG Guoxiang12
1.Huaneng Clean Energy Research Institute, Beijing 102209, China; 2.Beijing Key Laboratory of Carbon Dioxide Capture and Treatment, Beijing 102209, China; 3.College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
关键词:
煤岩压裂液相互作用矿物组成孔隙特征力学性质
Keywords:
coal rock fracturing fluid interaction mineral composition pore characteristic mechanical property
分类号:
-
DOI:
10.6056/dkyqt202001027
文献标志码:
A
摘要:
煤层气通常需要借助压裂改造措施来实现经济开采,但常用压裂液与煤岩之间相互作用的规律仍不清楚,这不利于煤层的压裂液选择和压裂施工设计。文中通过开展压裂液(CO2压裂液、活性水)与煤岩相互作用实验,研究了不同压裂液对煤岩性质的影响规律。结果表明:煤岩经CO2压裂液浸泡后,其矿物组成发生变化,方解石质量分数显著降低,黄铁矿次之,石英、有机质及黏土矿物质量分数略微增加,伊利石和高岭石被轻微溶蚀,煤岩溶蚀孔隙数量增多,孔隙度和渗透率增大,抗压强度降低幅度为46.0%;煤岩经活性水浸泡后,其矿物组成基本不变,高岭石发生轻微水化膨胀,煤岩孔隙度及渗透率降低,抗压强度降低幅度为1.6%;CO2压裂液比活性水压裂液更有利于煤层气压裂改造。
Abstract:
Coalbed methane usually needs fracturing stimulation to realize economic exploitation. However, the interaction behavior between commonly-used fracturing fluids and coal rock is still unclear, which is not conducive to the fracturing fluid selection for coal seam and the fracturing treatment design. This paper conducts static soaking experiments on the interaction between fracturing fluids(CO2 fracturing fluid and active water) and coal rock to investigate the influence of fracturing fluids on the properties of coal rock. Experimental results show that after the soaking treatment on coal rock with CO2-saturated brine, the content of calcite reduces significantly, followed by that of pyrite, while the content of quartz, organic matter and clay minerals are slightly increased. Moreover, illite and chlorite are dissolved with a limited scale, while kaolinite is scarcely dissolved. The number of dissolution pores increases and the pore size is enlarged, resulting in the enhancement in porosity and permeability as well as the decrement of compressive strength (up to 46.0%). After the soaking treatment with active water, the change in mineral composition of coal rock is negligible. The kaolinite undergoes slight hydration expansion, leading to the decrease in porosity, permeability, and compressive strength (approximately 1.6%). The obtained results show that CO2 fracturing fluid is more beneficial to the fracturing treatment of coal seam than the active water fracturing fluid.

参考文献/References:

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备注/Memo

备注/Memo:
更新日期/Last Update: 2020-02-06