霍尔果斯背斜深井井身结构优化设计
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摘要
霍尔果斯背斜受山前构造的影响,存在地质情况复杂、倾角大、多套压力体系并存以及泥岩含量高等问题,在钻进过程中复杂事故频发,严重制约了该地区油气勘探开发的进程。通过对完钻井的测井资料、地破实验数据、钻井复杂等资料的分析,确定必封点位置,形成适合霍尔果斯背斜深探井的四开井身结构,并针对安集海河组复杂事故率高的情况,采用高密度油基钻井液抑制泥岩水化,从而实现安全钻进。优化后的井身结构在霍尔果斯背斜深探井H11井进行了应用,首次实现了在安集海河组、紫泥泉子组两套压力系统下进行套打,历时5.5d钻穿"死亡之海"安集海河组,未出现井漏现象,取得了良好的应用效果。优化后的井身结构在H11井的成功应用,不仅为该地区深探井的井身结构设计提供依据,也为该地区后续常规井的四开转三开井身结构提供了指导。
Affected by tectonic,there are problems of complex geological conditions,large inclination,multiple pressure systems coexisting and high mudstone content in Horgos anticline,frequent complicated accidents seriously restricted the oil and gas exploitation and development process in this area.Based on the analysis on logging data,ground breaking experimental data and complicated well drilling and completion situation,the setting position was determined for 4-interval casing program of deep exploration well in Horgos anticline,and aiming at high complicated accident rate in Anjihaihe formation,by using high density oil-based drilling fluid,mudstone hydration was inhibited to realize safe drilling.The optimized casing program was applied in deep exploration well H11 in Horgos anticline,drilling was carried out under the pressure of Anjihaihe and Ziniquanzi formations for the first time,it took 5.5 days to penetrate Anjihaihe formation without well leakage.This successful application not only provides the basis for the design of the casing program of the deep exploratory well in the area,but also provides guidance for subsequent conventional casing program with 4 sections changed to be 3 sections.
Affected by tectonic,there are problems of complex geological conditions,large inclination,multiple pressure systems coexisting and high mudstone content in Horgos anticline,frequent complicated accidents seriously restricted the oil and gas exploitation and development process in this area.Based on the analysis on logging data,ground breaking experimental data and complicated well drilling and completion situation,the setting position was determined for 4-interval casing program of deep exploration well in Horgos anticline,and aiming at high complicated accident rate in Anjihaihe formation,by using high density oil-based drilling fluid,mudstone hydration was inhibited to realize safe drilling.The optimized casing program was applied in deep exploration well H11 in Horgos anticline,drilling was carried out under the pressure of Anjihaihe and Ziniquanzi formations for the first time,it took 5.5 days to penetrate Anjihaihe formation without well leakage.This successful application not only provides the basis for the design of the casing program of the deep exploratory well in the area,but also provides guidance for subsequent conventional casing program with 4 sections changed to be 3 sections.
引文
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[11]王中华.国内外超高温高密度钻井液技术现状与发展趋势[J].石油钻探技术,2011,39(2):1-7.
[12]何振奎.泌页HF1井油基钻井液技术[J].石油钻探技术,2012,40(4):32-37.
[13]林永学,王显光.中国石化页岩气油基钻井液技术进展与思考[J].石油钻探技术,2014,42(4):7-13.
[2]张雪飞,张伟,徐新纽,等.准噶尔盆地南缘H101井高密度油基钻井液技术[J].石油钻探技术,2016,44(1):34-38.
[3]陈明,于承朋,王光磊,等.川东北地区优化井身结构的探索与实践[J].天然气勘探与开发,2010,33(3):55-58,83-84.
[4]刘小康,田智生.页岩气井钻遇破碎地层的井身结构优化设计[J].探矿工程(岩土钻掘工程),2016,43(7):89-91,110.
[5]张海山,杨进,宫吉泽,等.东海西湖区块高温高压深探井井身结构优化[J].石油钻探技术,2014,42(6):25-29.
[6]刘小刚,崔治军,陶林,等.渤海油田科学探索井井身结构优化设计[J].断块油气田,2011,18(5):663-665.
[7]关德,罗勇,张海山.西湖凹陷低孔低渗深探井井身结构优化研究与应用[J].中国海上油气,2013,25(2):61-63.
[8]唐志军.井身结构优化设计方法[J].西部探矿工程,2005,(6):78-80.
[9]周延军,贾江鸿,李真祥,等.复杂深探井井身结构设计方法及应用研究[J].石油机械,2010,38(4):8-11.
[10]曾勇,郑双进,吴俊成.井身结构优化设计研究[J].长江大学学报(自然科学版),2011,8(9):60-62.
[11]王中华.国内外超高温高密度钻井液技术现状与发展趋势[J].石油钻探技术,2011,39(2):1-7.
[12]何振奎.泌页HF1井油基钻井液技术[J].石油钻探技术,2012,40(4):32-37.
[13]林永学,王显光.中国石化页岩气油基钻井液技术进展与思考[J].石油钻探技术,2014,42(4):7-13.