摘要
塔里木盆地台盆区下寒武统肖尔布拉克组、震旦系奇格布拉克组白云岩储层发育,靠近下寒武统玉尔吐斯组烃源岩,有利勘探面积为27500km^(2),勘探前景广阔。该区域从上到下地层岩性差别大,部分地层断裂发育、压力系统复杂,火成岩发育、地层可钻性差。复杂的地质条件及超高压超高温等难题给钻井工程带来巨大挑战。通过开展基于地质工程一体化的井身结构设计方法研究,形成了适合于超深井钻探的井身结构系列;开展特殊岩性地层岩石力学特征研究,结合地层破岩特征形成了个性化钻头设计及优选技术;基于钻井工程参数最优破岩规律,形成了水力参数和机械参数优化设计技术,同时基于地层岩性特征和井壁稳定分析结果,配套完善了钻井技术。目前,塔里木油田已经形成超8000m超深井钻探配套技术,同时具备9000m的钻探能力,完成了轮探1井的钻探,为有效推进塔里木盆地深部层系勘探进程、寻找油气增储上产接替区提供有力支撑。
The dolomite reservoirs of the Lower Cambrian Xiaoerbulake Formation and the Sinian Qigebulake Formation are developed in the platform-basin area in the Tarim Basin,which are close to the source rocks of the Lower Cambrian Yuertusi Formation.The favorable target area is 27500 km^(2) and it has a broad exploration prospect.However,the geological conditions in this area are very complex.The lithology difference between the upper and lower strata is large.Faults are developed in some strata and the pressure system is complex.In addition,igneous rocks are developed with poor drillability.The complex geological conditions and ultra-high pressure and ultra-high temperature make the drilling face great challenges.Through the research on wellbore structure design based on the integration of geology and engineering,the company has developed wellbore structure design technologies which are suitable for ultra-deep well drilling.Through lab test of rock mechanics characteristics of special formation rocks,it has developed the personalized design and selection of drilling bits combining with the rock breaking characteristics of the strata,and the hydraulic and mechanic parameters have been optimized based on the optimal rock breaking law.Meanwhile,based on the formation lithology characteristics and wellbore stability analysis,the drilling technology has been improved.By continuous research and improvement,the Tarim Oilfield possesses the supporting technology for drilling ultra-deep wells over 8000 m,and capable of drilling wells up to 9000 m.The completion of Well Luntan 1,effectively promotes the exploration process of the deep strata and strongly supports the discovery of replacement areas for increasing reserves and production in the Tarim Basin.
作者
杨沛
刘洪涛
李宁
周波
陈龙
文亮
Yang Pei;Liu Hongtao;Li Ning;Zhou Bo;Chen Long;Wen Liang(Yangtze University;PetroChina Tarim Oilfi eld Company)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2021年第3期126-135,共10页
China Petroleum Exploration
关键词
超深井
井身结构设计
可钻性
钻井参数优化
轮探1井
ultra-deep well
wellbore structure design
drillability
drilling parameter optimization
Well Luntan 1
