首页|迪北区块深层致密砂岩气藏氮气钻完井技术应用及认识

迪北区块深层致密砂岩气藏氮气钻完井技术应用及认识

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针对塔里木油田迪北区块目的层阿合组致密砂岩储层岩性致密、地层压力高、煤层发育,应用常规液体介质的钻完井技术对储层损害严重,为此特引入氮气钻完井技术,并在DX1 井开展现场试验,获得日产气量 82.39×104 m3,日产油量 100.8 m3 的高产.但由于地层岩性的复杂性,氮气钻完井过程中,出现了井壁垮塌严重、内防喷工具失效、井控装备冲蚀等问题,制约了氮气钻完井技术在该区块的推广应用.通过对井身结构、钻具组合、井口装备、排砂管线、内防喷工具以及配套工艺流程等关键工艺、装备的改进优化,形成适用于高压高产深层致密砂岩储层的氮气钻完井配套工艺技术,并在DB104 井开展了现场试验,试验效果显著.与同区块液体介质钻井的钻完井方式相比,DB104 井日产气增加了 400 余倍,日产油量增加了 6 倍.通过DX1 井和DB104 井证明,只要工艺、装备、措施得当,氮气钻完井技术在迪北区块这类高温高压深层致密砂岩气藏中对储层具有重要的保护作用,可为塔里木油田乃至全国高压高产致密砂岩储层的高效勘探开发提供技术支撑.
Application and Understanding of Nitrogen Drilling and Completion Technology in Deep Tight Sandstone Gas Reservoirs in the Dibei Block
Targeting the tight sandstone reservoirs of the Ahe Formation in the Dbei Block of the Tarim Oilfield,characterized by dense lithology,high formation pressure,and developed coal seams,the conventional liquid-based drilling and completion technology significantly damages the reservoir.Therefore,nitrogen drilling and completion technology was introduced and field-tested in the well DX1,achieving high production with a daily gas output of 82.39×104 m3 and a daily oil output of 100.8 m3.However,due to the complexity of the formation lithology,severe wellbore collapse,failure of internal blowout prevention tools,and erosion of well control e-quipment occurred during the nitrogen drilling and completion process,limiting the widespread application of this technology in the block.Improvements and optimizations in key processes and equipment,including wellbore structure,bottom hole assembly,wellhead equipment,bleed off ling,internal blowout prevention tools,and ac-companying technological processes,a suitable nitrogen drilling and well completion technology for high-pres-sure,high-yield tight sandstone reservoirs was developed.This technology was field-tested in the well DB104,showing significant results.Compared to the liquid-based drilling and completion methods in the same block,the daily gas production of DB104 well increased by more than 400 times and the daily production increased by 6 times.The wells DX1 and DB104 demonstrate that with proper techniques,equipment,and measures,nitrogen drilling and completion technology can effectively protect the reservoir in high-temperature,high-pressure,deep dense sandstone gas reservoirs in the Dibei Block.This technology provides technical support for efficient explo-ration and development of high-pressure,high-yield,dense sandstone reservoirs in the Tarim Oilfield and across the country.

Dibei Blockhigh-pressure high-yielddeep tight reservoirnitrogen drilling and well completionreservoir protection

王春生、冯少波、龙敏、李宁、梁红军、张权、秦宏德、滕志想

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中国石油塔里木油田公司

迪北区块 高压高产 深层致密气藏 氮气钻完井 储层保护

中国石油集团公司科技专项中国石油集团公司科技专项

2023ZZ14-062023ZZ14

2024

钻采工艺
四川石油管理局钻采工艺技术研究院,西南油气田分公司采气工程研究院

钻采工艺

北大核心
影响因子:0.634
ISSN:1006-768X
年,卷(期):2024.47(1)
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