渤中34-X区块储层保护钻井液技术研究及应用  

Research and application of reservoir protection drilling fluid technology in Bozhong 34-X block

作　　者：宋晓伟 SONG Xiaowei(Oilfield Chemistry Division,CNOOC Services Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]中海油服务股份有限公司油田化学事业部,天津300452

出　　处：《石油化工应用》2022年第3期15-18,共4页Petrochemical Industry Application

基　　金：中国海洋石油集团有限公司渤海油田3000万吨持续稳产重大科技专项子课题“渤海边际油田高效开发钻完井配套技术”,项目编号:CNOOC-KJ135 ZDXM36 TJ06TJ。

摘　　要：由于渤中34-X区块储层油藏埋藏较深,地层微裂隙非常发育、地层渗透率低,传统的钻井液体系不能满足在保证防塌的同时有效保护储层;采用传统套管完井的方式,产量不能达到配产要求。针对储层地层特性,开发出以甲酸钾和海水1:1混合为连续相的新型强抑制储层保护钻开液,采用逐级拟合充填技术,保留裸眼完井对储层保护的优势,同时有效抑制易坍塌,降低作业风险。该体系在BZ34-X-P1井成功应用,配产满足油藏要求,实现了安全钻井与储层保护的目的,为推广使用和批量作业提供了不可多得的经验。Due to the deep burial of reservoir in Bozhong 34-X block, the formation microfractures are very well developed and the formation permeability is low. The traditional drilling fluid system cannot protect the reservoir effectively while preventing collapse. Conventional casing completions cannot meet production requirements. According to the characteristics of reservoir formation, a new type of drilling fluid with strong inhibition reservoir protection is developed, which is composed of 1:1 mixing of potassium formate and seawater as continuous phase. The step-fitting filling technology is adopted to retain the advantages of open hole completion for reservoir protection, and effectively suppress easy collapse and reduce operational risks. The system was successfully applied in well BZ34-X-P1, and the production allocation met the requirements of reservoir, realizing the purpose of safe drilling and reservoir protection, providing rare experience for popularization and batch operation.

关 键 词：防塌 抑制性 储层保护 甲酸钾 

分 类 号：TE257.6[石油与天然气工程—油气井工程]