--> Key Techniques for Deep Well Drilling Optimization in the Block Matambo,Colombia
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Petroleum Previous HitDrillingNext Hit Techniques, Issue 2, 2018

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Key Techniques for Deep Previous HitWellNext Hit Previous HitDrillingNext Hit Optimization in the Block Matambo,Colombia

Zhenguo Zheng1, Hongsheng Li1, Haiyan Zhao2, Huiyun Wen3, Dongfang Sun1


1Sinochem Petroleum Exploration and Development Co., Ltd., Beijing, 100077, China
2Staff Education and Training Center, CNPC Bohai Previous HitDrillingNext Hit Engineering Co. Ltd., Tianjin, 300280, China
3Bohai Petroleum Research Institute, Tianjin Branch of CNOOC(China) Co. Ltd., Tianjin, 300459, China


Issue 2, 2018 – Petroleum Previous HitDrillingNext Hit Techniques, Issue 2, 2018,

Posted: August 3, 2018

Abstract

The formation depth of the Block Matambo in Columbia is around 5 000.00 m.Situated in mountainous terrain,it has complex surface conditions with a large dip angle,multiple pressure systems,high in-situ stresses,frequent fault and fracture zones,multiple thick mudstone formations,massive gravel formations and abnormally high-pressure formations.Downhole problems like Previous HitwellNext Hit collapse,drill pipe sticking,and circulation lost were frequently encountered in the Previous HitdrillingNext Hit process in six Previous HitwellNext Hit drillings resulting in slow Previous HitdrillingNext Hit rate and long Previous HitdrillingNext Hit cycle.In order to improve the oil and gas exploration and development benefits in this block,we conducted technical research from the aspects of casing program optimization,wellbore trajectory design and control,multi-parameter monitoring and analyzing while Previous HitdrillingNext Hit,cementing technique optimization,Previous HitdrillingNext Hit fluid system optimization,etc.by fully analyzing the geological conditions of this block and summarizing the experiences of previously drilled wells Based on the research,we developed key techniques in deep Previous HitwellNext Hit Previous HitdrillingNext Hit suitable for this block.Field tests have been conducted in the Previous HitWellNext Hit G10ST5 and it was drilled to the designed depth smoothly with wellbore quality and cementing quality up to design requirement.Compared with other six deep wells drilled within this block,the Previous HitdrillingNext Hit cycle was reduced by 20.7 days and average ROP was increased from 3.00 m/h to 7.00 m/h,and loss time from downhole failure decreased from the original 15%-30% to 7%,and the comprehensive Previous HitdrillingNext Hit cost was reduced by nearly 45%.The results of field tests illustrated that those key techniques in deep Previous HitwellNext Hit Previous HitdrillingNext Hit in the Block Matambo could meet the requirement of enhancing speed and efficiency in deep Previous HitwellNext Hit Previous HitdrillingNext Hit,and also provide a good analogy and reference points in the rapid Previous HitdrillingNext Hit of complicated deep wells in similar formations.

AAPG Datapages/Search and Discovery Article #130001© Petroleum Previous HitDrillingTop Techniques, Issue 2, 2018