波纹管技术在哈萨克斯坦肯基亚克盐下油田的应用

Expandable casing employed in reservior under salt formation in Kazakhstan kenkyak oilfield

姜治 李荣 张亮 郭彬

JIANG Zhi LI Rong ZHANG Liang GUO Bin

中国石油集团公司钻井工程技术研究院，北京　100097 中国石油勘探开发研究院廊坊分院海外工程技术研究所，河北廊坊　065007

CNPC Drilling Research Institute, Beijing 100195, China RIPED-Langfang, CNPC, Langfang 065007, China

哈萨克斯坦肯基亚克盐下油田石膏层和盐岩层同时出现在一个裸眼井段，开发使得石炭系压力系数逐渐降低至1.5，而二叠系压力系数仍为1.79，造成在施工过程中经常发生漏失和溢流、坍塌，使用波纹管可以解决该问题。通过研究地层岩性和压力，确定了波纹管下入深度；结合井身结构确定了波纹管的外径、压力等级。膨胀的波纹管内径和同井段所钻的井眼内径相同，且能够承受井内液柱压力或地层挤压，为钻井作业的顺利施工提供了保证。采用该技术解决了由于地层岩性不同和压力不同造成的复杂情况，不仅为安全钻进提供了技术保证，而且保护了储层，对今后推广波纹管技术有一定的借鉴意义。

Gypsum-bearing and carbonate formation show in the same open hole section during the drilling in Kazakhstan kenkyak oilfield. expandable casing was used to prevent the leakage, overflow and breakout in the down hole of the reservoir under salt formation where the pore pressure in the below Carboniferous was only 1.5 because of development and the one in the above Permian was 1.79 originally The running depth of corrugated tube is made by formation lithology and pressure while its outer diameter and pressure grade decided by the well configurations. The inner diameter of expanded bellows is just the same of drilling hole after treatment, and it is able to endure both the fluid pressure in the hole and the extrusion force form outside strata that make the following drilling more successful. This technology can transfer from higher pressure Permian to lower pressure Carboniferous safely and successfully so it solve the complex due to formation lithology and pressure. The technology was used to not only keep drilling smoothly and successfully but also protect the reservoir. From this application in the oilfield, we accumulate some experience on bellows employ which provide reference for industry extension of thebellows.