金资1井Ф195mm大直径盐层取心实践

SALT BED Ф195MM CORING PRACTICE IN WELL JINZI-1

杨立文

Yang Liwen

辽河石油勘探局工程技术研究院辽宁盘锦 124010

Liaohe Petroleum Exploration Bureau

金资1井是西气东输金坛盐穴地下储气库工程的1口资料井,为给储气库安全设计提供可靠的油层物性数据,需要取出的岩心的直径越大越好,为此,采用了目前国内最大直径的LY - 195型取心工具进行取心。通过分析预测该井取心过程中岩心不易拔断,取心工具直径大易出现遇阻严重的现象,采取了及时更换钻头、停钻快速转动拔断岩心、控制钻头切削内径、提高钻速等方法,使该井采用大直径取心工具在井深986.44~1016.44m盐岩层中取心30m,岩心长29.57m,岩心收获率98.6%,为盐岩层分析提供了准确可靠的岩心资料。

Well Jinzi-1 is drilled to provide the formation petrophysical data for the secure design of underground gas storage project used for west to east gas transportation, thus large size cores need to be obtained for reliable data and information, and therefore LY-195 coring tool, which is the largest diameter available domestically was used for coring in this well. As large size coring tool may cause such problems as severe blockage and difficult core cutting off, a serious of engineering measures were taken, e.g., timely change of bit, stop drilling and then fast rotation to cut off the core, control the bit cutting ID, improve ROP, etc. Coring was conducted from 986.44~1016.44 m, and a core as long as 29.57 m was obtained with core recovery rate of 98.6%.

10.3969/j.issn.1000-7393.2004.04.010