生物酶钻井液技术在大牛地气田的研究与应用  

Application of Bioenzyme Drilling Fluid to Daniudi Gasfield

作　　者：魏凯[1] 李国锋[1] 党冰华[1] 

机构地区：[1]中国石化华北油气分公司石油工程技术研究院,河南郑州450006

出　　处：《天然气技术与经济》2018年第3期33-36,共4页Natural Gas Technology and Economy

基　　金：十三五国家重大专项"低丰度致密低渗油气藏开发关键技术"(2016ZX05048)

摘　　要：大牛地气田主力储层致密低渗,在钻井过程中极易受到侵入地层和黏附在井壁上的钻井化学材料或暂堵材料的伤害,造成地下流体通道不畅,影响开发效果。由于生物酶的生物降解特性可以将天然高分子钻井化学剂及暂堵材料降解为水和二氧化碳,实现对致密地层低伤害、低污染钻进,因此,在分析大牛地气田储层伤害机理的基础上,形成了生物酶钻井液配方,并进行了实验室页岩膨胀试验、降解性能试验、岩心渗透率恢复试验以及现场应用。该技术的应用实现了生产过程中致密泥饼的有效降解清除,满足了气田环境保护和可持续发展的需要。In Daniudi gasfield, the main reservoirs are featured by low permeability. During a drilling, there are some damages from chemical and temporary plugging materials attaching to sidewall or intruding into formation, so that underground fluid passage moves not free which is unavailable for field development. With the function of biodegradation, bioenzyme may degrade these high-polymer materials to water and carbon dioxide in order to perform tight formation drilling with low damage and pollution. After analyzing certain reservoir-damage mechanisms, a formula of bioenzyme drilling fluid was developed for Daniudi gasfield, and its property was evaluated. Its application to low-permeability sandstone reservoirs in this field shows a better result, and may offer reference for other similar ones.

关 键 词：生物酶 低渗砂岩 抑制性 大牛地气田 

分 类 号：TE254[石油与天然气工程—油气井工程]