西南石油大学学报(自然科学版)

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Oil-based Drilling Fluid Technology of Nadu Formation in Baise Oilfield

ZHOU Chenghua1*, ZHANG Zhen1, HU Deyun1, YANG Guoxing1, DENG Yuanzhou2   

  1. 1. Drilling Engineering Research Institute of Southwest Petroleum Engineering Co. Ltd.,SINOPEC,Deyang,Sichuan 618014,China
    2. CCDC Petroleum Drilling & Production Technology Co. Ltd.,Guanghan,Sichuan 618300,China
  • Online:2016-04-11 Published:2016-04-11

Abstract:

The Nadu formation of Baise Oilfield is fairly complex,in which malignant collapse caused by borehole instability
happen easily during drilling. To solve this problem,the strong sealing and inhibitive oil-based drilling fluid is researched and
developed. This system comprises of nanoscale solid-liquid sealing material so as to improve the sealing properties and has
good anti-pollution,lubricating and rheological properties. The experiment applied in third section of well Kun 8 6HF shows
that the oil-based drilling fluid can prevent the wellbore from collapsing and meet the requirement of safe drilling. Thus it has
efficiently solved the complex problem of malignant collapse during horizontal well drilling in Nadu formation.

Key words: malignant collapse, Baise Oilfield, Nadu Formation, oil-base drilling fluid, Well Kun 8 6HF

CLC Number: