|本期目录/Table of Contents|

[1]刘学伟.页岩储层水力压裂支撑裂缝导流能力影响因素[J].断块油气田,2020,27(03):394-398.[doi:10.6056/dkyqt202003025]
 LIU Xuewei.Influencing factors of hydraulic propped fracture conductivity in shale reservoir[J].Fault-Block Oil and Gas Field,2020,27(03):394-398.[doi:10.6056/dkyqt202003025]
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《断块油气田》[ISSN:1005-8907/CN:41-1219/TE]

卷:
27
期数:
2020年03
页码:
394-398
栏目:
钻采工艺
出版日期:
2020-05-25

文章信息/Info

Title:
Influencing factors of hydraulic propped fracture conductivity in shale reservoir
文章编号:
25
作者:
刘学伟
中国石油大港油田分公司石油工程研究院,天津 300280
Author(s):
LIU Xuewei
Research Institute of Petroleum Engineering, PetroChina Dagang Oilfield Company, Tianjin, 300280, China
关键词:
页岩储层水力压裂支撑裂缝导流能力影响因素
Keywords:
shale reservoir hydraulic fracturing propped fracture conductivity influencing factors
分类号:
TE357.1
DOI:
10.6056/dkyqt202003025
文献标志码:
A
摘要:
支撑裂缝的导流能力是评价页岩储层水力压裂施工效果的一项重要参数,其大小受到多种因素影响。文中开展了支撑剂类型、颗粒大小、铺砂浓度等对支撑裂缝导流能力影响的室内实验研究。结果表明:陶粒的导流能力明显高于石英砂和覆膜砂,在低闭合压力条件下,20~40目陶粒的导流能力最大,在高闭合压力条件下,组合支撑剂的导流能力明显高于单一支撑剂;铺砂浓度越大,裂缝导流能力越大;循环应力加载模式下,裂缝导流能力比稳载时下降了31.7%,经过滑溜水和胍胶压裂返排液污染后,裂缝导流能力分别下降了33.9%和76.5%。研究成果指导了X-4井的现场压裂施工,该井措施后产气量较高且稳定生产,压裂增产效果较好。
Abstract:
The conductivity of propped fractures is an important parameter for evaluating the effect of hydraulic sand fracturing in shale reservoirs, and which is often affected by many factors. Therefore, laboratory experiments on the effects of proppant type, particle size, sand concentration, cyclic stress and fracturing fluid backflow on the fractures conductivity were carried out, and on this basis, the design of on-site fracturing technology was guided. The results show that the conductivity of ceramsite was obviously higher than that of quartz sand and coated sand; under low closure pressure, 20-40 mesh ceramsite has the greatest conductivity, while under high closure pressure, the conductivity of composite particle proppant was obviously higher than that of single particle proppant. The larger the sanding concentration was, the larger the fracture conductivity was. The impact of cyclic stress change and fracturing backflow fluid on the supporting fracture conductivity of shale reservoir was greater. Under cyclic stress loading mode, the fracture conductivity decreased by 31.7% compared with that under steady loading. Bacause of the pollution of slippery fracturing backflow fluid and guanidine gum fracturing backflow fluid, the fracture conductivity decreased respectively by 33.9% and 76.5%. Referring to the above research results, in-situ fracturing of well X-4 has been carried out. After the measures, the gas production of the well was relatively high and stable, which has played a good fracturing stimulation effect.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-09-26;改回日期:2020-01-09。
第一作者:刘学伟,男,1984年生,工程师,主要从事油气田措施改造方面的研究工作。E-mail:3075394559@qq.com。
基金项目:中国石油天然气股份有限公司重大科技专项“大港油区效益增储稳产关键技术研究与应用”(2018E-11)

更新日期/Last Update: 2020-05-21