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complicated deep well
相关语句
  复杂深井
     Compared with the advanced level in world, Petrochina still has the very big margin in the complicated deep well drilling level.
     但是同世界先进水平相比,中石油在复杂深井钻井水平方面还有很大差距。
短句来源
     In recent years Petrochina suffered the world hard nut to crack in complicated deep well drilling process in Quele and Dina Tarimu, Yumen Kulongshan, the east of Sichuan and Xinjiang Huoerguosi etc.
     近年来中石油在塔里木却勒和迪那、玉门窟窿山、四川川东、新疆霍尔果斯等复杂深井钻井过程中遭遇了世界性的难题。
短句来源
  相似匹配句对
     as well as complicated subsurface structures.
     ③地下构造复杂等。
短句来源
     Application of Deep-well Anode Bed
     深井阳极地床的应用
短句来源
     Deep-well Dead-load Experiment
     深井静载荷试验初探
短句来源
     DEEP-HOLE BLASTING TECHNIQUES IN COMPLICATED SURROUNDINGS
     复杂环境下露天深孔爆破的若干技术
短句来源
     It is well-known that geology data are very complicated.
     地学数据以长时间、大尺度、大规模为特征 ,包括空间数据和非空间数据 (属性数据 ) .
短句来源
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Well Chengu-1 is an important scientific exploration well, with a total depth of 4264 m and the main target of the Proterozoic Era. The lithology consists of conglomerate, shale, carbonolite, hard brittle shale, basalt, pelitized basalt, quartzite and granite, etc. Multiple pressure layers are penetrated, thus drilling fluid technology is the key for the successful drilling of this well. Proper drilling fluid systems arc selected based on the formation characteristics and drilling requirements for reservoir...

Well Chengu-1 is an important scientific exploration well, with a total depth of 4264 m and the main target of the Proterozoic Era. The lithology consists of conglomerate, shale, carbonolite, hard brittle shale, basalt, pelitized basalt, quartzite and granite, etc. Multiple pressure layers are penetrated, thus drilling fluid technology is the key for the successful drilling of this well. Proper drilling fluid systems arc selected based on the formation characteristics and drilling requirements for reservoir protection. In the surface 562 mm hole, bentonite mud is used. In the 444. 5 mm hole, MMH drilling fluid is adopted. This system has good cuttings transportation capability and without washing the wall, which is good for the drilling in large size borehole. Non-toxic polyol drilling fluid system is used in the 311 mm hole, this minimize such troubles as sloughing, sticking and orientation correcting in the complicated deep well, and ensures the safety of completion, especially the case of heavy load casing cementing. In the 216 mm hole. KCl-lime dispersing drilling fluid system is used, this system has good inhibition and stability, and it is easy of field conditioning Using of it in this section results good well stability and downholc safety, the hole is regular and few sloughing problems are encountered. In the bottom 177. 8 mm hole, oil-in-water drilling fluid is used. Its density is adjustable between 0. 95-0. 99 g/cm3,and has better emulsifying and rheologi-cal property, and high temperature stability in 150 C . which meets the requirements of under-balanced drilling of ultra-deep wells of 4000 - 5000 m. Field drilling shows that this drilling fluid technology meets the requirements of both under-balanced drilling and conventional drilling operations, and achieves good formation protection results.

陈古1井是1口近5000 m的重要科学探井。主要目的层为元古界,兼探S_3、S_4油层。岩性主要为砾岩、泥岩、碳质泥岩、硬脆性泥岩、玄武岩、泥化玄武岩、石英岩及花岗岩等。由于地层复杂,存在多套压力层系,钻井液技术是该井的关键技术。根据地层特点、钻井工程要求和满足保护油气层的需要,一开使用膨润土浆;二开采用MMH钻井液体系,该体系具有携岩能力强、不冲蚀井壁的特点,保证了大井眼井段的防塌;三开使用聚合醇无毒钻井液体系,解决了复杂井段的防塌、防卡、扭方位等复杂问题;四开采用KCl-石灰分散型钻井液体系,该体系抑制能力强,性能稳定,维护处理简单,满足了陈古1井沙河街组地层钻进需要,井壁稳定、井下安全、井径规则,具有明显的防塌效果;五开使用水包油钻井液,该钻井波密度在0.95~0.99 g/cm~3之间可调,在150℃条件下乳化稳定性好,具有良好的流变性及高温热稳定性,完全满足4000~5000 m超深井欠平衡钻井的需要。现场施工表明,该井钻井液技术满足了常规钻井工程需要及欠平衡钻井施工要求,很好地保护了油气层。

The stability of performance of testing completion fluid is key factor in high temperature and super deep gas well safety testing. During the completion well testing period of the vertical well section of Ku 1, we tested 2 times and the downhole packer was all imbedded, result in very serious downhole accident. According to the Ku 1 sidetrack drilling completion well formation testing and special request of well structure, through the laboratory study, testing completion fluid is the high performance combined...

The stability of performance of testing completion fluid is key factor in high temperature and super deep gas well safety testing. During the completion well testing period of the vertical well section of Ku 1, we tested 2 times and the downhole packer was all imbedded, result in very serious downhole accident. According to the Ku 1 sidetrack drilling completion well formation testing and special request of well structure, through the laboratory study, testing completion fluid is the high performance combined completion fluid which adopts solid free formate completion fluid, formate drilling fluid viscous pad fluid, high density sulphonated polymer mud system, the system's temperature resistance is above 168 ℃, and has powerful suspension property, and is free from pollution to the oil layer. The high density completion fluid through 25 days field tests ,and after the completion fluid is static, the RD safe valve both in opens and remove plugging are all successfully. This solve effectively the wellbole stability of the complicated deep well under high temperature, high pressure and long hours testing condition, and testing stability under long hours static condition. This provides an example for the completion well safety test of other high temperature and high pressure well.

 测试完井液性能稳定是高温超深气井安全测试的关键因素。库 1井直井段在完井测试期间, 2次测试井下封隔器均被埋死,造成非常严重的井下事故。根据库 1井侧钻完井试油及井身特殊要求,通过室内研究,测试完井液采用无固相甲酸盐完井液+甲酸盐钻井液稠垫液+高密度聚磺钻井液体系的高性能复合型完井测试液,该体系抗温达 167℃以上、悬浮能力强、对油层无污染。使用高密度的完井液现场测试 25d静止后, RD安全阀开启和解封均很顺利,有效解决了复杂深井高温、高压及长时间测试环境下的井眼稳定性和长时间静止下的测试稳定性,为以后高温高压井的完井安全测试提供了一个范例。

The drilling technique of deep well and ultradeep well is a symbol of a national drilling technique standard. The American and European's drilling technique of deep well is always in the lead of the world. Recently, the penetration rate of deep well, drilling cycle and bit consumed per well etc. of Petrochina obtains the great progress, at the same time, it also has great development on the deep well drilling unit. Compared with the advanced level in world, Petrochina still has the very big margin in the complicated...

The drilling technique of deep well and ultradeep well is a symbol of a national drilling technique standard. The American and European's drilling technique of deep well is always in the lead of the world. Recently, the penetration rate of deep well, drilling cycle and bit consumed per well etc. of Petrochina obtains the great progress, at the same time, it also has great development on the deep well drilling unit. Compared with the advanced level in world, Petrochina still has the very big margin in the complicated deep well drilling level. In recent years Petrochina suffered the world hard nut to crack in complicated deep well drilling process in Quele and Dina Tarimu, Yumen Kulongshan, the east of Sichuan and Xinjiang Huoerguosi etc. The outstanding expression is prevention deviation and quick drilling in hill foot high dip angle structure and over thrust body, and inaccurate identification of geologic strata in Tarimu Quele which causes sticking due to borehole shrinkage, and narrow safe mud density window that leads to differential sticking problem in Dina, and prevention malignant lost circulation in Sichuan, and complex in-situ stress, formation fractured and abnormal pressure etc. in south edge of Xinjiang. This study presents the appropriate solution for these problems, and shows off the ways drilling the same kind geologic strata.

深井、超深井钻井技术是一个国家钻井技术发展水平的标志。美国和欧洲的深井钻井技术水平一直处于世界领先水平。中石油近年来在深井机械钻速、钻井周期、单井钻头用量等方面都取得了很大进步,同时在深井钻井装备上也有了很大发展。但是同世界先进水平相比,中石油在复杂深井钻井水平方面还有很大差距。近年来中石油在塔里木却勒和迪那、玉门窟窿山、四川川东、新疆霍尔果斯等复杂深井钻井过程中遭遇了世界性的难题。突出表现在山前高陡构造和逆掩推覆体防斜打快问题、塔里木却勒地层卡层不准引起的缩径卡钻和迪那窄密度窗口压差卡钻问题、四川恶性井漏的防治问题、新疆南缘地区的地应力复杂、地层破碎、异常高压等。针对这些问题提出了相应的解决方法,给同类地层的钻探指明了方向。

 
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