共查询到20条相似文献,搜索用时 62 毫秒
1.
ˮƽ���������ữ��Ч������ 总被引:4,自引:4,他引:0
针对磨溪气田水平井段长度大、有效储层分散及非均质的特点,提出了水平井连续油管拖动解堵及大型空井酸化工艺技术,即先将连续油管下到水平段末端,根据水平井段储层分布规律,在连续油管注酸的同时按设计的速度提升连续油管,直到酸液覆盖整个水平储层段。采用这种方法,可以让每个射孔段都能接触到地面原始浓度的鲜酸,解决了由于水平井段长,部分射孔段难以接触到鲜酸的难题。此外,还可以将水平井段中的压井液替出井底和进行酸后液氮排液,提高了残酸的返排效率,减少了增产作业中的二次损害。大型空井酸化对连续油管酸化后的井进行彻底解堵和改造。该工艺技术在M75—H、M38H及M50井实施了水平井连续油管酸化工艺试验。3口先导试验水平井累计增加井口产能37.86×104m3/d,是该地区同类直井平均产量的4~7倍,获得了显著的增产效果和经济效益。 相似文献
2.
3.
4.
伊拉克Mishrif油层在开发生产中显示出储层非均质性强、储层伤害、多口井产量低等问题,酸化措施能够为目标区储层高效开采提供技术保障。由于Mishrif油层水平井裸眼井段较长,且伤害带呈不均匀分布,采用全井段一次性笼统酸化的方式,很难取得理想的改造效果,必须采用有效分流材料实现均匀布酸。根据储层特点及水平井酸化作业的要求,开展了胶凝酸、自转向酸、可解除油溶性化学微粒的SA-1分流剂的研究,提出了2套基质酸化工艺:胶凝酸+自转向酸组合的连续油管拖动酸化,胶凝酸+自转向酸组合的化学微粒分流酸化。 相似文献
5.
6.
7.
清洁转向酸在磨溪嘉二高压气藏水平井完井酸化中的应用 总被引:1,自引:1,他引:0
针对磨溪嘉二气藏埋藏较深、高温、高压,水平井段长度大、有效储层分散及非均质的特点,成功用于磨溪雷气藏水平井完井酸化的连续油管拖动酸化工艺,由于受注入压力、管径的限制,施工排量、规模受限。不能完全满足嘉二气藏完井酸化的需要。新开发的清洁转向酸技术是依靠反应生成的盐类物质(CaCl2、MgCl2)的浓度及pH值的变化自然调节酸液的粘度,实现酸液的转向。达到封堵已酸化储层(高孔、高渗、裂缝性产层)的目的,从而实现非均质储层(长水平井段)的均匀酸化。该工艺技术在M005-H3井获得了成功应用,射后初测产气3.5706×10^4m^3/d,采用加重酸解堵酸化后,测试产量减至2.61×10^4m^3/d,采用清洁转向酸措施后气产量增至4.7888×10^4m^3/d,采用胶凝酸重复酸化后产量又减至3.3366×10^4m^3/d,表明清洁转向酸体系在该井的应用中具有明显的优势。 相似文献
8.
水平井水力喷射分段改造工艺在靖边气田的应用 总被引:2,自引:0,他引:2
靖边气田从2006年开始广泛采用水平井,到2011年3月已完钻水平井20口,其储层的改造方式以笼统酸压为主,通常采用水平段连续油管拖动布酸+油管酸压,该工艺对短水平段水平井效果较好,但对长水平段水平井的储层改造针对性不强,其水平段中物性相对较差储层得不到有效改造。为此,针对长水平段水平井开展了水力喷射分段改造施工,该工艺是一种利用水射流独特性质的储层改造技术,结合了水力射孔和水力压裂技术,能够沿着水平井横向在多个位置独立连续改造而不使用任何机械密封装置。2010年靖边气田在5口水平井上进行了试验施工,以储层的深度改造为目的,Φ114.3 mm筛管内完成7段分段压裂,Φ139.7 mm裸眼井段中10段分段压裂,大大缩短了作业周期,减轻了劳动强度。现场应用结果表明,水力喷射分段改造施工在靖边气田具有较强的适应性,单井产量均得到大幅度提高,可大规模推广使用。 相似文献
9.
水平井酸化液分布规律研究 总被引:1,自引:0,他引:1
考虑了酸液在水平井段的变质量管流,建立了水平井酸化时酸液流动的数学模型,研究了酸液在水平井段的分布规律.通过敏感性因素分析研究了地层渗透率、酸液黏度、注酸速度、井筒半径和水平段长度对水平井段酸液分布的影响,通过计算得出:地层渗透率越大、酸液黏度越小、注酸速度越大、井筒半径越小和水平段长度越长,水平井段酸液分布越不均匀,跟部进酸量高于趾部进酸量.通过机械转向、化学微粒暂堵剂分流酸化、水力喷射酸化、连续油管注酸等措施在一定程度上可以改善酸液分布情况,改善水平井酸化效果. 相似文献
10.
碳酸盐岩水平井酸化改造的关键问题是水平段如何均匀布酸,常用方法是采用多级暂堵工艺。但元坝海相长兴组气藏由于埋藏超深、温度高,常规的暂堵剂无法满足施工要求。为此,研制了新型有机纤维暂堵剂,输送介质采用高黏压裂液,室内实验测试可降低岩心渗透率1 000倍以上,具有较好的物理暂堵效果,同时纤维在高温酸液中溶解率高,实现了暂堵后零残留。酸化前利用液氮诱喷钻井液净化水平井井筒,酸化工艺采用多级暂堵交替注入,依据水平段储层分布及衬管段确定暂堵级数,暂堵液与胶凝酸以“初期低排量、暂堵定排量、后期大排量”的方式交替注入,实现水平段的均匀布酸。该工艺在现场实施4口井,暂堵有效率近80%,增产有效率100%,表明对深层碳酸盐岩水平井改造有较好的针对性。 相似文献
11.
12.
13.
14.
采油过程中,酸化是油气井增产、注水井增注的主要措施。砂岩基质酸化和碳酸岩基质酸化都是在低于储层破裂压力的条件下向地层中注入酸液,溶解地层中的可溶物质,清除孔隙或裂缝中的堵塞物质,从而使油气井增产或注水井增注的一种工艺措施。本文着重讨论了砂岩酸化的设计计算方法,并由此建立一套基质酸化设计方法。 相似文献
15.
《Oil and Energy Trends》2008,33(5):6-7
This section summarizes downstream developments of the previous month. Exploration & Production are covered in 'Upstream Review'.
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
An upsurge of violence in Iraq threatened a recovery in output that began earlier this year. Production in the northern fields hit a post-invasion high of 620,000 bpd in March, rising by 180,000 bpd in one month. Fighting in the south, however, cut production there by more than 100,000 bpd as government troops tried to subdue Shi'ite militias in and around Basrah. Oil installations damaged in the south included a pipeline and a pumping station. The Iraqi government nevertheless announced that oil production would reach 2.9 mn bpd by the year's end, requiring an increase of nearly 500,000 bpd over April 2008 levels. Foreign help is to be sought via a series of technical service agreements and - later this year - an upstream licensing round. Japan's Ministry of Economy, Trade and Industry says it wants a bigger role for Japanese oil companies in both the upstream and downstream sectors in Iraq. Kurdistan says it is negotiating with Baghdad to export oil produced from new oil fields there. The central government does not recognize production agreements drawn up by the Kurdistan Regional Government. The EU - desperate for gas to fill its Nabucco pipeline - has approached Iraq for up to 1 bn cfd. 相似文献
16.
17.
18.
19.