共查询到20条相似文献,搜索用时 78 毫秒
1.
南海陆丰油田古近系储层低渗、近水、储层跨度大等特征极大限制了常规储层改造技术的实施,开展适合陆丰油田的爆燃压裂联合酸化技术应用研究十分必要。本文以陆丰油田古近系储层的2口试验井L1、L2为例,通过优化火药燃烧速度和火药力,在有效控制峰值压力、裂缝长度、避免沟通邻近水层的同时,确保了试验井较高的增产倍比;采用夹层枪和多趟施工管柱相结合的作业方式,提高了大跨度储层爆燃压裂联合酸化技术的作业效率;采用低成本、强溶蚀酸液体系,增强了爆燃压裂后酸化的溶蚀扩缝效果。针对爆燃压裂联合酸化技术在试验井L1应用中出现的起爆器断裂、部分层位产液不足问题,提出了采用高强度起爆器、确保较高的火药单位质量等改进措施并应用于试验井L2井,最终取得了显著的增产效果。本文研究有效拓展了现有储层改造技术的应用范畴,为国内外类似储层规模开发提供了借鉴。 相似文献
2.
3.
中国海上存在大量的低渗油田处于待开发状态,油气储量大,动用程度低,它是未来海上油田油气接
替的重要组成部分。目前海上低渗透油田的增产措施技术手段非常有限,海上平台受到空间限制,部分储层还存
在厚度薄、边底水活跃的特征,水力压裂等低渗透油藏改造措施也难以实施;常规的酸化措施改造力度弱,酸液很
难注入地层,导致酸化效果不理想。通过大量、深入的研究及论证,爆燃压裂酸化是一种低渗油藏储层改造技术,
它适合于海上油田特殊油藏、平台条件,工艺简单,安全可靠,在中国海上油田LF13-1油田26H井进行首次应用,
作业前该井由于产量较低,长期处于关井状态,作业后产液量为127m3/d,目前已累增油1237m3,增产效果十分显著,在中国海上低渗油田具有广泛应用前景。 相似文献
4.
5.
针对石西油田低渗油藏强水敏性伤害储层,油井转注水初期,普遍存在注入压力高、注不进的实际问题,基于黏土矿物的防膨原理和现场防膨经验,为了提高XH-F3防膨剂的防膨效果,采用乙醇与注入水混配,其防膨率得到显著提高,满足了油田指标要求。静态实验结果表明,采用该防膨技术,岩心破碎率低、腐蚀率低,配伍性好。现场实验表明,注入该防膨型醇水配制的酸液,酸化后注入压力大大下降,注水量增加3~5倍,达到了防止黏土矿物膨胀、实现近井地带酸化解堵的目的。 相似文献
6.
低渗低压油藏多功能活性酸化工作液体系研究 总被引:1,自引:0,他引:1
针对低渗低压油藏增注过程采用的常规酸化技术中所存在的酸化工作液溶蚀率高、酸化半径小、工作液对有机垢不产生作用等问题,研制了一种适合低渗低压油藏的多功能活性酸工作液。通过对酸液体系处理剂优选、复配得到多功能活性酸体系配方(质量分数):20%SZJ+6.7%SFJ+10%盐酸+2.5%ZRJ+5.0%溶垢剂+水。该酸液在45℃下具有较好的缓速效果和溶蚀能力,对地层中的有机垢具有较好的增溶能力,同时还具有优良的缓蚀能力和防膨能力,其腐蚀速率小于2.5g/(m2·h),酸化前后工作液体系防膨率分别大于90%和85%。 相似文献
7.
8.
为了解决海上油田应用爆燃压裂技术的安全性问题和压裂后高效增产的技术难点,研发了耐高温、低火药力和低燃速火药,建立了爆燃压裂模拟模型,采用安全管柱组件并进行安全校核,形成了海上油田井口泄压方法,并采取强化软件模拟和与酸化技术联作等措施增强技术安全性、提高压裂后的增产效果,形成了海上油田爆燃压裂技术。该技术在海上油田8口井进行了现场试验,试验井峰值压力为22.4~71.3 MPa,管柱均无安全问题,平均单井增油量43.1 m3/d。研究表明,爆燃压裂技术在海上油田具有较好的适应性,适用于多种井况条件,形成的海上油田爆燃压裂安全控制和高效增产配套技术具有安全、高效的优点,能够提高爆燃压裂的安全性和压裂后的增产效果。 相似文献
9.
伊通盆地岔路河储层有效孔隙度8.4%~14.7%,渗透率0.3~8.9 m D,属于低孔低渗储层,压裂过程中易出现异常现象。分析认为储层存在砂泥交互特征,坚硬、致密及钻井过程中泥浆滤失等原因造成储层伤害,导致压裂出现异常压力高、压不开、加砂困难等问题。针对储层岩性及污染特征,优选高强度复合酸液体系及添加剂,酸液体系对储层岩样溶蚀率大于40%,钻井泥浆溶蚀率大于28%,通过酸化改造可以使砂岩微观孔隙结构发生改变,增加储层的渗透性,有效降低储层压裂压力。现场优选1口井开展先导性试验,酸化处理后压裂施工压力下降20%,顺利完成压裂施工,为后续区块开发提供技术保障。图3表4参10 相似文献
10.
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.