吐哈油田鲁克沁西区低渗稠油油藏水平井压裂技术  

Horizontal well fracturing technology in low permeability heavy oil reservoir in Lukeqin west district of Tuha oilfield

作　　者：杨明敏 李明强 岳翰林 邢海斌 郝新元 曹劲杰 郭丹丹 YANG Mingmin;LI Mingqiang;YUE Hanlin;XING Haibin;HAO Xinyuan;CAO Jingjie;GUO Dandan(China Petroleum Western Drilling Tuha Downhole Operation Company,Shanshan Xinjiang 838200,China)

机构地区：[1]中国石油西部钻探吐哈井下作业公司,新疆鄯善838200

出　　处：《石油化工应用》2024年第5期43-46,51,共5页Petrochemical Industry Application

摘　　要：Y108块是吐哈油田鲁克沁西区三叠系油藏的主力区块,油藏非均质性强,物性自上而下逐渐变差,目的层T2k2Ⅱ油组3砂组物性低于10 mD,采出程度仅1.09%,一直以来难以得到有效动用。针对区块储层非均质性强、物性差、地层压力系数低、地层原油黏度大、采出程度低等特点,采用“细分切割+注水蓄能+乳化降黏”技术思路,实施水平井体积压裂改造,且实施过程不断总结、分析、优化蓄能规模和压裂工艺参数。2020—2022年,该技术在鲁克沁西区低渗稠油油藏现场应用6井次,压后初期平均日产油47.70 t,目前日产油25.00 t,累计产油2.15×104t,压后效果显著。应用结果表明,该技术可提高鲁克沁西区低渗稠油油藏储层开发动用程度,对区块提产具有重要意义。Block Y108 is the main block of the Triassic oil reservoir in Lukeqin west district of Tuha oilfield.The heterogeneity of the reservoir is strong,and the reservoir properties gradually deteriorate from the upper formation downwards.The permeability of the target layer T2k2ⅡNo.3 sand formation is lower than 10 mD,and the recovery is only 1.09%,which has been difficult to effectively develop.In response to the characteristics of strong heterogeneity,poor reservoir properties,low formation pressure coefficient,high crude oil viscosity,and low recovery of the reservoir in the block,the technical solution of"subdivision cutting+water injection and energy storage+emulsification viscosity reduction"was adopted to implement horizontal well volume fracturing.During the implementation process,the energy storage scale and fracturing process parameters were continuously summarized,analyzed and optimized.From 2020 to 2022,this technology was applied 6 times on site in low permeability heavy oil reservoirs in the western region of Lukeqin.In the early stage after fracturing,the daily oil production was 47.70 t,and currently the daily oil production is 25.00 t,with a cumulative oil production of 2.15×104t,significant effect after fracturing.The results indicate that this technology can improve the development of low permeability heavy oil reservoirs in the western region of Lukeqin,and is of great significance for increasing production in the block.

关 键 词：吐哈油田 三叠系 低渗 稠油 注水蓄能 乳化降黏 水平井 压裂 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]