长庆靖边气田深度酸压改造技术的发展与完善

DEVELOPMENT AND PERFECTION OF DEPTH ACID FRACTURING TECHNOLOGY IN JINGBIAN GAS FIELD OF CHANGQING

长庆靖边气田经过十多年的较大规模的勘探与开发,有利区块逐渐减少,储层地质情况日益复杂,物性条件变差,增产改造难度加大,迫切需要对靖边气田下古生界的碳酸盐岩深穿透酸压改造进行更深层次的技术攻关,实现提高致密储层单井产量及该区块储量的动用程度。文章针对不同储层类型系统开展了前置液酸压、变粘酸酸压两项深度酸压改造工艺技术的深化与发展研究。前置液酸压已成为靖边气田致密储层改造的一条新途径;变粘酸酸压是靖边气田物性条件稍好储层深度改造的主体技术之一,且产品实现了自主化,取得了较为明显的改造效果,为长庆靖边气田下一步的发展奠定了良好的技术基础。

For long-term exploration and development in Jingbian gas field, the geologic framework of Jingbian gas field is becoming complex day by day, the increasing production in the reservoir is very difficult . In order to improve the individual - well production rate of tight gas reservoir and producing reserves, depth acid fracturing technologyis used in Jingbian gas Geld. According to different reservoir type, the paper researched depth acid fracturing technology of ahead acid and acid with variable viscosity. Pad acid fracturing has become a new way for tight gas reservoir reforming of Jingbian gas field, acid fracturing with variable viscosity is one of the main technique for reforming reservoir with better physical characteristics and good fracturing effect is obtained . It provides good technique basis for development of Jingbian gas field in future.