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随着辽河油田进入开采中后期,老区稳产增产成为主要课题。多年的注采开发,导致地层压力异常,固井质量要求越来越高,井网密集,老区块的调整井、水平井等的防碰问题严峻,调整区块安全钻井问题日益突出。鉴于此,结合井下故障数据库,逐步建立了辽河油区调整区块施工风险评估和消减措施模板,并形成了一套有针对性的调整区块安全钻井技术,包括承压堵漏技术、松软地层大井眼定向技术、老井封井技术等。通过推广应用新技术,2010～2012年辽河曙采区块、欢采区块共完成调整井钻井121口,同比共节约钻井周期326d,节约钻井成本1956万元。通过模板的实施,各项钻井技术指标得到明显改善,曙光杜84区块事故复杂率由2010年的8.36%下降到2012年的6.01%。调整区块安全钻井技术的实施,可进一步巩固传统交易市场,并逐步进入调整区块开展区块总包业务。
With the Liaohe Oilfield into the mining in the late, steady production increase in the old area become a major issue. Many years of injection and development have led to abnormal formation pressure, higher and higher cementing quality requirements, dense well pattern, anti-collision problems of adjusting wells and horizontal wells in old blocks, and drilling safety problems in block adjustment have become increasingly prominent. In view of this, in combination with the database of downhole faults, a template for risk assessment and mitigation measures for block adjustment in the Liaohe Oil Region has been gradually established, and a set of targeted safety drilling technologies for block adjustment have been formed, including pressure plugging technology, Big hole directional technology, old wells and other well-closure technology. Through the promotion and application of new technologies, from 2010 to 2012, a total of 121 well drilling wells were completed in the Liaohe Shu mining area and the Huanzai block, a year-on-year savings of 326 days, saving drilling costs of 19.56 million yuan. Through the implementation of the template, various drilling technical indicators have been significantly improved. The complexity of Dawuguodu 84 block accident rate dropped from 8.36% in 2010 to 6.01% in 2012. Adjusting the implementation of Block Safe Drilling Technology can further consolidate the traditional trading market and gradually adjust the block to carry out the block total package business.