Influence of Aciding Pretreatment on Fracture Width
作者
薛仁江，郭建春，赵金洲
Authors
Xue R enjiang , Guo J ianchun, Zhao Jinzhou
单位
(西南石油大学油气藏地质及开发工程国家重点实验室, 四川成都610500)
Organization
Key Laboratory of O il and Gas Reservoir Geo logy and Exploitation, Southw estPetroleum University, X indu 610500, China
摘要
水力压裂作为重要的油气增产措施之一, 其目的就是形成一条具有一定长度的
高导流能力支撑裂缝。然而对于一些高致密储层来说, 由于储层岩石致密坚硬, 杨氏模量和抗
张强度、地层闭合压力高, 要想进行深穿透的大型加砂压裂, 井口施工压力很高, 通常超过了设
计要求的压裂井口、井下工具等承压能力而不得不终止施工。在分析影响压裂缝宽的各个因
素基础上, 应用酸化预处理技术改变岩石力学参数, 同时增加了地层的吸液能力, 提高施工排
量, 达到增加缝宽的目的。保证支撑剂顺利进入地层, 防止出现砂堵事故。
Abstract
A s one o f the most im po rtant stim ulation techno log ies, the purpose o f hydraulic frac tur ing is to prov ide a h igh conductiv ity fracture w ith ce rtain leng th. H ow ever, fo r som e h ighly tigh t reservoir, because o f its h igh Young s m odu lus, h igh tensile strength, h igh c losure pressure, it is custom that w e ll pressure is h igher than the bearing pressu re of the subsurface too,l wh ich leads to term inate execution a t last. Th is article analyses every factors that in fluence the fracture w idth, uses ac id precond itioning techn ique to chang e rock m echan ics param eters a t the sam e tim e, ncrease the reservo ir w ater injectiv ity ability, ra ise the displacem ent volum e. The inc rease o f fracturew idth insures tha t the proppant can en ter into the fractures in order to prevent sand plug troub les.
关键词：
酸化预处理;
支撑剂;
裂缝宽度;
Keywords:
A cid precond itioning techn ique, Proppan t, Fracturew idth.;
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