江苏油田堵漏试验评价技术研究及其应用

Study on loss circulation control test instrument and its application in Jiangsu oilfield

就日益突出的钻井井漏问题,在调查研究江苏油田20年来井漏井史资料的基础上,分析了引起此问题的主要原因及解决思路,阐述了在钻井防漏堵漏试验评价技术研究方面取得的最新进展。通过分析堵漏材料评价方法和漏失地层物化特性,研制了DL-1和DL-2两套钻井堵漏试验仪器,制作了用于堵漏评价的人造岩心,制定了评价堵漏材料的新方法,使堵漏模拟与评价更趋于真实。通过室内堵漏材料的评价优选,结合主要漏失层特点,在沙埝19和20区块7口井中制定了合理的防漏堵漏技术方案,无一发生明显漏失,减少了堵漏复杂时间,避免了井下复杂与事故的发生。

Due to the increasing loss circulation problems, the article aims at the latest laboratory technology of loss circulation materials. The main cause of well loss circulation and the solution are concluded based on the historical drilling data more than twenty years in Jiangsu oilfield. Synthetic core used for loss circulation test were prepared and two series of loss circulation test instruments named DL-1 and DL-2 were built to study the property and performance of most of the loss circulation materials.Bas...