影响川东C_2h1低渗透储层改造效果的因素

川东C2 h1储层非均质性强 ,低渗透储量占有较大比例。为了提高气藏采收率 ,合理高效开发气田 ,必须对C2 h1低渗透储层进行改造。该储层在 1 998年前曾进行 44井次压裂酸化改造 ,有效率 50 %。文中在研究前人经验成果的基础上 ,通过分析影响C2 h1储层改造的因素 ,找到在储层发育情况、储层埋藏深、地层破裂压力高、压井液漏失、酸化工艺、施工参数、排液不及时和设备故障等造成酸压效果差的因素 ,提出了 6点建议 ,以对C2 h1储层进行综合改造。

Factors of affecting C_2h1 low permeability reservoir remodeling result in east Sichuan

C 2h1 low permeability reservoir has stronger heterogeneity and reserves has a large scale in east Sichuan.To enhance the reservoir recovery factor,develop gas fiel deffectively and resonablely,the C 2h1 low permeability reservoir must be remodeled.The reservoir has been remodeled by acid fracturing before 1998.Effectiveness is 50%.On the basis of analysis and study,the factors of affecting reservoir remodeling by acid fracturing are found,which are reservoir burial depth,high formation breakdown pressure,killing fluid leak,acidizing technology,operation parameter,untimely flowing back and equipment fault etc..The paper proposes 6 suggestions for C 2h1 low permeability reservoir remodeling.