摘要
塔里木油田克深13区块属于超深、超高压、高温气藏,地层易漏易喷,需要大规模储层改造,完井工艺难度大。总结了塔里木油田高压气井完井工艺现状,根据克深13区块的地质条件和工程要求,对比评价了射孔-改造-完井联作的一次完井工艺和先射孔、后改造-完井联作的两次完井工艺。一次完井工艺射孔枪耐温耐压满足不了要求,且存在井筒堵塞、射孔枪砂埋、生产测试受限等问题。二次完井工艺存在替浆不彻底,导致井筒堵塞和储层伤害的问题。为了解决二次完井替浆问题,开展了可溶筛管二次完井工艺研究。该工艺可以满足全井筒替浆、储层改造、生产测试的要求,同时避免了井筒堵塞和管柱砂埋,且有利于后期修井打捞。
The Keshen 13 Block of the Tarim Oilfield is a gas reservoir of ultra depth,ultra high pressure and high temperature,which tends to suffer mud loss and blowout easily,it needs large-scale reservoir reconstruction,and its well completion processes are of high difficulty.The status of the well completion processes used in the high pressure gas wells of the Tarim Oilfield was summarized.Then,based on the geological conditions and engineering requirements of Keshen 13 Block,the one-stage well completion process of perforation-reconstruction-completion combination and the two-stage well completion process of perforation firstly and then reconstruction-completion combination were comparatively evaluated.It is indicated that as for the one-stage well completion process,its perforating gun cannot satisfy the temperature and pressure requirements,and it undergoes wellbore blockage,sand buried perforating gun,restricted production testing and other problems.The two-stage well completion process is suffered from incomplete mud displacement,which results in wellbore blockage and reservoir damage.In order to solve the problem of mud displacement in the two-stage well completion,the two-stage well completion process with soluble screen was studied.It is indicated that this process can satisfy the requirement of full-hole mud displacement,reservoir reconstruction and production testing while avoiding wellbore blockage and sand buried string and it is also beneficial to the later workover fishing.
作者
张洪宝
匡韶华
张宝
景宏涛
ZHANG Hongbao;KUANG Shaohua;ZHANG Bao;JING Hongtao(Drilling and Production Technology Research Institute,PetroChina Liaohe Oilfield Company,Panjin 124010,Liaoning,China;Oil and Gas Engineering Research Institute,PetroChina Tarim Oilfield Company,Korla 841000,Xinjiang,China)
出处
《石油钻采工艺》
CAS
北大核心
2020年第1期40-44,共5页
Oil Drilling & Production Technology
关键词
超高压高温气藏
全通径射孔
完井
克深区块
ultra HTHP gas reservoir
full-bore perforation
well completion
Keshen Block
