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塔里木油田25口“血栓”井恢复“元气”暖今冬

2019-01-13 18:02:01    新华网

新华社乌鲁木齐1月13日电(记者顾煜)“沉睡”半年之久的克深2-2-8井,实施连续油管解堵作业,恢复日产天然气30万立方米。截至目前,西气东输气源地之一的塔里木油田,已通过25口“血栓”气井“元气”恢复,日增天然气324万立方米,今冬向下游累计增供天然气7.8亿立方米,让更多东部地区和新疆共享“福气”增添了流量。

塔里木油田是西气东输主力气源地,现已投入开发克拉2、迪那2、克深等16座气田,其中克深、迪那两大气田,属于超深、超高压高温气井,开采过程受地层压力影响,气井出现不同程度的积砂堵塞井筒等现象,有些气井因出砂频繁被迫关井,成了“沉睡井”。

据介绍,天然气井井筒堵塞如同人体患有“血栓”一样,往往会使天然气井“元气”不足,直接影响天然气的生产供应。为此,塔里木油田组织开展老油气田综合治理,不断加深堵塞物和堵塞类型认识,对百余口井筒堵塞井展开综合研究,促进了油气藏经营管理模式的转变。

天然气井的“复活”源于自研技术。塔里木油田加大科研力度,充分发挥科研项目的管理和技术优势,历经一年时间取样500余次的实验,实施超深高压气井特色井筒解堵技术,自主研发“三套解堵液”体系。

目前,塔里木油田“三套解堵液”的应用,已让25口天然气井措施后单井平均油压从30提升至59兆帕,日产天然气由作业前685.4万立方米提升至1013.5万立方米,创造了近年来井筒堵塞复产增气的最好成绩。按每家3口人每天消费1立方米天然气计算,已增产出来的天然气,相当于可供一座千万人口的大型城市用气。

塔里木油田作为西气东输能源大动脉主力气源之一,今年以来,外输天然气持续超8000万立方米。2018年塔里木天然气产量创下266.21亿立方米新高,与上年同比净增5%,连续8年以平均每年12亿立方米的速度快速增长,其中,向西气东输供气213.9亿立方米,14年累计供气2216.82亿立方米。

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