钻井液与完井液2023，Vol.40Issue(6)：718-724,7.DOI:10.12358/j.issn.1001-5620.2023.06.004
川东北高含硫气藏钻井液抗硫工艺优化与应用
Optimization of Sulfur-Resistant Drilling Fluid Techniques and Its Application in Drilling High Sulfur Content Reservoirs in Northeast Sichuan
摘要
Abstract
Reservoirs in the Tieshanpo formation,the Luojiazhai formation,the Dukouhe formation,the Qilixia formation,the Zhengba formation and the Feixianguan formation in the Pushadan gas field in northeastern Sichuan are those with high or extra-high sulfur content gas reservoirs.This paper discusses the optimization of sulfur-resistant drilling fluid techniques for the drilling of these high sulfur content reservoirs based on the analyses of the reservoir formation geology and of the difficulties in drilling fluid operation.A drilling fluid with sulfur resistance was formulated through laboratory experiment.Laboratory evaluation of the effects of mud viscosity,pH value,alkalinity and oil/water ratio on the absorption of H2S has shown that the optimized water-based drilling fluid and the oil-based drilling fluid have good sulfur resistance.The sulfur-resistant drilling fluid formulated has been very successfully used on the well Po-002-H4 and the well Luojia-24;the drilling time was greatly shortened,the rate of penetration obviously increased,the average hole enlargement reduced,and the drilling fluid showed good sulfur-resistance and sulfur-removal during drilling.This drilling fluid has satisfied the requirements of drilling wells with high sulfur content,and has broad development and application prospects in drilling the high sulfur content formations in the lower east Sichuan area.关键词
高含硫化氢气藏/抗硫水基钻井液/抗硫油基钻井液/抗硫工艺/飞仙关组地层Key words
High H2S gas reservoir/Sulfur-resistant water-based drilling fluid/Sulfur-resistant oil-based drilling fluid/Sulfur-resistance technique/Strata of the Feixianguan Formation分类
能源科技引用本文复制引用
肖金裕,周华安,暴丹,冯学荣,卢浩,杨兰平,汪伟..川东北高含硫气藏钻井液抗硫工艺优化与应用[J].钻井液与完井液,2023,40(6):718-724,7.基金项目
川庆钻探工程有限公司科技攻关项目"川东北高含硫气藏钻井液抗硫及承压堵漏关键技术深化研究与试验"(CQ2021B-46-Z2-3). （CQ2021B-46-Z2-3）
