[1]向峰.双岩心爪取心工具的研究与应用[J].石油钻采工艺,2016,38(4):442-445.[doi:10.13639/j.odpt.2016.04.007]
 XIANG Feng.Development and application of coring tools with double core catchers[J].Oil Drilling & Production Technology,2016,38(4):442-445.[doi:10.13639/j.odpt.2016.04.007]
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双岩心爪取心工具的研究与应用
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《石油钻采工艺》[ISSN:1000-7393/CN:13-1072/TE]

卷:
38卷
期数:
2016年4期
页码:
442-445
栏目:
钻井完井
出版日期:
2016-07-20

文章信息/Info

Title:
Development and application of coring tools with double core catchers
文章编号:
1000 – 7393( 2016 ) 04– 0442– 04
作者:
向峰
大庆钻探工程公司钻井工程技术研究院
Author(s):
XIANG Feng
Drilling Engineering Technology Research Institute, CNPC Daqing Drilling & Exploration Engineering Corporation, Daqing, Heilongjiang 163413, China
关键词:
复杂地层取心收获率双岩心爪
Keywords:
complex formation coring core recovery double core catchers
分类号:
TE244
DOI:
10.13639/j.odpt.2016.04.007
文献标志码:
B
摘要:
复杂地层一般是指裂缝发育,软硬互层,胶结性、稳定性及强度较差的地层,在对该地层进行取心施工时,一直存在撸心、掉心、岩心收获率低等问题。依据复杂地层的特点,研制了双岩心爪取心工具,该工具结合了自锁式取心工具与加压式取心工具的优点,在软地层割心时,可以通过加压式岩心爪将岩心割断并封堵内筒,防止撸心、掉心;在硬地层割心时,启动自锁式岩心爪,楔入岩心,将岩心割断。现已在大庆地区进行了两口井的现场应用,应用表明,该工具有良好的地层适应性,工艺操作简单,成本低,能够有效提高复杂地层取心收获率指标,保证化验分析的准确度,为油田的高效开发提供可靠的地质依据。
Abstract:
Complex formations refer to those with abundant fractures, alternating soft and hard layers, and poor cementation, stability and strength. Coring operations in complex formations often encounter such problems as core ripping, core disengagement and low core recovery. In light of features of complex formations, a coring tool with double core catchers has been developed. With combined advantages of self-locking and pressurized coring tools, the newly-developed coring tool may effectively cut the core and properly secure it in the inner barrel during coring operations in soft formations by using the pressurized catcher, in this way, the captured core can be protected against ripping and disengagement. While in coring operations in hard formations, the self-locking core catcher can be mobilized to penetrate into and cut the core. This tool has been used in two wells in Daqing Oilfield. On-site application shows this tool, with good formation adaptability, simple operation and low costs, can effectively enhance core recovery in complex formations to ensure accuracy of lab analysis, so reliable geologic data can be provided for highly efficient oilfield development.

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更新日期/Last Update: 2016-09-06