胜科1井钻井设计与施工

Design and Implementation of Well Shengke-1

为了解胜利油田孔2段烃源岩发育情况和盐下构造含油气情况,评价生油气潜力,胜利油田设计施工了胜科1井。该井完钻井深7 026 m,是中国东部油区目前最深的一口井,井底温度高达235℃,地层压力当量密度最高达2.30 kg/L。该井钻井施工中主要存在盐膏层及软泥岩层的安全钻进、井身质量控制困难、存在多套压力层系、复合套管的下入与固井、超高温超高压对钻井液性能和水泥浆性能及固井工具的要求高、机械钻速低等问题,在对钻井设计进行充分论证,并对施工难点进行了充分分析的基础上,制定了相应对策,使该井顺利钻至设计井深完钻,并取得了10个方面的技术成果与突破。该井的顺利完成,为其它超深井钻井积累了宝贵经验。详细介绍了该井的设计与现场施工情况。

For the purpose of understanding the development of Kong Ⅱ Section hydrocarbon source rocks and hydrocarbon bearing under salt bed structure,and of evaluating the hydrocarbon generating potential,Well Shengke-1 with a well depth of 7026m,the deepest well in east oilfields,was designed and implemented in Shengli Oilfield.The bottom hole temperature was as high as 235℃ and the equivalent drilling fluid density was up to 2.30 g/cm3.There were many challenges during the drilling,including safety drilling through gypsum and soft shale formations,difficulty in control the wellbore quality,multiple pressure systems,running of compound casing string,cementing,higher requirements of the properties of drilling fluids and cement slurry,and of the cementing tools due to the high pressure and high temperature,and low rate of penetration.Based on the analysis of the challenges during drilling,the corresponded plans were designed to make sure this well drilling to the designed well depth.Ten technical achievements and breakthroughs have been achieved at the same time.The design and implementation of Sengke-1 Well were introduced in detail.