摘要
水力压裂是油气增产的重要开采方式,石英砂压裂支撑剂是水力压裂法施工时使用的关键材料。由于石英砂压裂支撑剂短期导流能力低,因而不能使油气的产量增加。通过硅烷偶联剂改性提高了石英砂压裂支撑剂短期导流能力。采用四种硅烷偶联剂,包括γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)、乙烯基三甲氧基硅烷(A171)、乙烯基三乙氧基硅烷(A151)、乙烯基三(β-甲氧基乙氧基)硅烷(A172),对70-140目石英砂压裂支撑剂进行改性,研究了闭合压力为10~60 MPa时不同种类硅烷偶联剂对样品短期导流能力的影响。结果表明,当硅烷偶联剂相同时提高闭合压力,造成短期导流能力持续降低。当闭合压力相同时,KH570和A172所得样品短期导流能力分别为最高(54.18~6.19μm^(2)·cm)和最低(36.41~2.21μm^(2)·cm),A171和A151所得样品短期导流能力在前两者之间,分别为49.23~5.21μm^(2)·cm和42.38~4.91μm^(2)·cm。该研究结果能有效提高石英砂压裂支撑剂短期导流能力,可为制造高短期导流能力压裂支撑剂提供技术依据。
The hydraulic fracturing is the main way of stimulation in the oil and gas development,and the quartz sand fracturing proppants are the key construction materials used in the hydraulic fracturing.However,due to the low short-term conductivity of the quartz sand fracturing proppants,it is difficult to achieve the goal of oil and gas production increase.The short-term conductivity of the quartz sand fracturing proppants is enhanced by a silane coupling agent modification way.The four types of silane coupling agents,including KH570,A171,A151 and A172 were used to modify the 70-140 mesh quartz sand fracturing proppants under the closed pressure ranging from 10~60 MPa.The results indicate that using the same silane coupling agents when increasing the closure pressures results in a continuous decrease in short-term conductivity.When the closing pressure is the same,the short-term conductivity of the samples obtained by KH570 and A172 are the highest(54.18~6.19 μm^(2)·cm) and the lowest(36.41~2.21 μm^(2)·cm),respectively.The short-term conductivity of the samples obtained by A171 and A151 are between the first two,which are 49.23~5.21 μm^(2)·cm and 42.38~4.91 μm^(2)·cm.This study can effectively enhance the short-term conductivity of the quartz sand fracturing proppants,which can provide some ideas for synthetizing the fracturing proppants with high short-term conductivity.
作者
靳权
宋恩鹏
蔡克
JIN Quan;SONG Enpeng;CAI Ke(National Petroleum Tubular Goods Quality Supervision and Inspection Center,Key Laboratory of Petroleum Tubular Goods and Equipment Quality Safety for State Market Regulation,CNPC Tubular Goods Research Institute,Xi′an,Shaanxi 710077,China)
出处
《石油管材与仪器》
2024年第1期41-44,共4页
Petroleum Tubular Goods & Instruments
基金
中国石油集团公司基础研究和战略储备技术研究基金项目“CO_(2)压裂用自悬浮材料设计及关键技术研究”(编号:质科K22-001)。
关键词
石英砂
压裂支撑剂
硅烷偶联剂
改性
短期导流能力
quartz sand
fracturing proppant
silane coupling agent
modification
short-term conductivity
