摘要
基于超分子化学原理研制的超分子凝胶暂堵剂,其适用于地层温度在90~110℃页岩气藏,并且具有稳定时间可调、强度高、解堵易的特点,可实现微裂缝以及深部裂缝屏蔽暂堵。利用β-CD作为主体,以SES作为客体,通过添加助剂构筑了一种新型的温度响应性超分子凝胶暂堵剂体系SCD12,通过表征手段证明了暂堵剂体系各组分之间存在超分子作用。并对其破胶残渣量、配伍性、流变、暂堵性能进行了测试。结果表明,暂堵剂体系SCD12在常温下为液态,黏度低而易于泵入。升温后能够迅速的封堵裂缝,即使破胶后黏度出现下降,仍然能够在一定的温度范围内实现有效封堵。其动态封堵能力为168.06 MPa·m^(-1),封堵性能好,岩心伤害率为9.3%,可以满足页岩气开发的暂堵转向压裂要求,是一种具有应有前景的新型暂堵剂。
A supramolecular gel temporary plugging agent suitable for use in shale gas reservoirs of 90-110℃was developed based on the principle of supramolecule chemistry.It has several advantages such as adjustable stable time,high strengths and ease of being removed.These advantages make it suitable for temporarily plugging micro-fractures and deep fractures.The new temperature-responsive supramolecular gel temporary plugging agent SCD12 was developed withβ-CD as the host and SES as the guest,as well as other additives.Characterization of SCD12 shows that there is a supramolecular action among different components of the plugging agent.SCD12 was tested for the weight of residue after gel breaking,compatibility,rheology and temporary plugging performance.These experiments show that SCD12 is in a liquid form in room temperature and has low viscosity and hence good pumpability.At elevated temperatures,SCD12 can quickly plug fractures.SCD12 can effectively plug fractures in a certain temperature range even after gel breaking which results in viscosity reduction.The dynamic plugging capacity of SCD12 is 168.06 MPa·m^(-1).Percent permeability loss of a rock sample by SCD12 is 9.3%.These advantages of SCD12 satisfy the needs of temporary plugging in diverting fracturing of shale gas reservoirs,and make SCD12 a new promising temporary plugging agent.
作者
张照阳
陈越美
鲍晋
唐雷
唐嘉
赖南君
ZHANG Zhaoyang;CHEN Yuemei;BAO Jin;TANG Lei;TANG Jia;LAI Nanjun(CNPC Chuanqing Drilling Engineering Company Limited,Chengdu,Sichuan 610051;School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500)
出处
《钻井液与完井液》
CAS
北大核心
2022年第6期767-775,共9页
Drilling Fluid & Completion Fluid
基金
川庆校企联合项目“温度响应性超分子凝胶压裂暂堵剂研究”(CQXN-2020-07)
关键词
超分子凝胶
暂堵剂
温度响应性
页岩气藏
裂缝封堵
Supramolecular gel
Temporary plugging agent
Temperature responsiveness
Shale gas reservoir
Fracture plugging
作者简介
第一作者:张照阳,工程师,博士,1986年生,毕业于西南石油大学油气田开发工程专业,现在从事油气田增产工作液和配套工艺等研究。电话15680638269,E-mail:979967787@qq.com;通讯作者:陈越美,E-mail:407878955@qq.com
