钻探工程2024，Vol.51Issue(6)：119-124,6.DOI:10.12143/j.ztgc.2024.06.015
超深水超浅层储层无隔水管钻井取心难点与对策
Difficulties and countermeasures of core drilling without riser in ultra-deep water and ultra-shallow reservoirs
摘要
Abstract
In the ultra-deep and ultra-shallow reservoirs("double ultra"for short),problems exist such as difficult coring operation,low success rate,high operation cost,and lack of reference experience.In view of this,the analysis of the coring difficulties without risers is carried out,the corresponding technical countermeasures are put forward,and a set of efficient coring scheme is formed.The results show that in the"double ultra"environment,the reservoir is dominated by unconsolidated and loose argillous sandstone,and the coring operation faces the problems and challenges of"blocked core",the difficulty of controlling displacement and bit weight,and the high cost of ultra-deep water operation.The Rb-8100 fully enclosed conserved coring tool and HSC043-8100 coring bit are selected,corporated with small perameter mode of small displacement(200L/min),low speed(15～40r/min)and stepped bit weight(2～10t).The self-made net diverts seawater at the bit and protects the bottom core.The pilot test of riserless coring was carried out in"double ultra"gas field in South China Sea,and the core recovery reached 100%.It is the first time to realize the efficient coring operation in"double ultra"reservoirs,and lays an important foundation for the later development of ultra-deep and ultra-shallow reservoirs gas field.关键词
超深水超浅层储层/疏松地层/海洋钻井取心/保形取心工具/无隔水管作业Key words
ultra-deep water and ultra-shallow reservoir/loose formation/offshore coring/conformal coring tool/riserless operation分类
能源科技引用本文复制引用
陈浩东,吴艳辉,马传华,黄洪林,罗鸣,李文拓,代锐,廖高龙..超深水超浅层储层无隔水管钻井取心难点与对策[J].钻探工程,2024,51(6):119-124,6.基金项目
中海油"十四五"重大科技项目课题"深水超深水复杂井安全高效钻完井关键技术"(编号:KJGG2022-0201) （编号:KJGG2022-0201）
