共查询到19条相似文献,搜索用时 78 毫秒
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页岩气等非常规气藏是我国“十四五”天然气上产的重要领域,其主体开发工艺是“水平井+体积压裂”。在排采技术中,气举由于不受井斜、井深等限制,在水平井中应用优势突出。基于此,研究提出了贯穿整个排采期的全生命周期气举排水采气技术。该技术以多级气举阀为核心,通过改进设计方法和完井工具,实现连续气举与柱塞气举、泡沫排水采气、负压回注排水采气、喷射气举等技术的集成,并配套智能化管理平台,形成气举复合排水采气技术,可利用一趟完井管柱将气井开采至废弃。建立贯穿全生命周期的技术策略,满足了页岩气藏不同生产阶段排水采气技术需求,减少了排采方式变更带来的修井作业量,达到降低技术成本、减少储层伤害的目的,预计可提高采收率3%~6%,页岩气井开采成本大幅降低。 相似文献
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苏东气田气井生产过程中会带出成藏时期形成的滞留水和凝析水,随着生产时间延续,气井产量降低携液能力不足而形成井筒积液,当积液量逐渐增大时,致使气井水淹而无法产气,目前苏东气田有产水气井270口,占投产气井的33.2%,产水井产能不能够有效发挥成为制约气田稳产、上产的主要因素因此苏东气田把排水采气工艺列为气田开发重点工作并将持续开展下去。本文简述了苏东气田采用的泡沫排水采气、连续油管排水采气、井间互联气举排水采气工艺技术原理并对其适应性进行分析评价,建立了排水采气技术路线,为排水采气工艺技术的推广应用提供了依据。 相似文献
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介绍一种新型柱塞-分体式柱塞,研究了其工作原理、适应的工作环境、工作动态模型,以及在油田现场应用的效果。将此种柱塞应用于排水采气工艺,可明显的改善井底状况,气井的产量可得到大幅度提高。 相似文献
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苏里格气田属于典型的"三低"气田,气井投产后产气量、压力下降快,气井携液能力不足,随着生产时间的延长,气田积液气井逐年增多且达到了区块总井数的60%,井底积液也愈发严重,确保气井产能发挥与解决井筒积液问题之间的矛盾日益突出。以苏里格气田中部苏6、苏36-11等6个区块排水采气工艺技术推广试验应用为例,针对泡沫排水、速度管柱、柱塞气举、气举复产等排水采气工艺技术,从技术进展、适用性分析、实施效果、工艺评价等方面进行总结分析,明确了气井不同生产阶段排水采气工艺措施,建立了排水采气工作流程,历年累计增产气量突破7×108 m3。通过技术应用评价探索出低压低产气井排水采气工艺方法,形成了苏里格气田排水采气工艺技术系列,对气田产水气井的开发管理提供指导。 相似文献
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目前,由西南油气田分公司采气研究所设计施工与推广应用的球塞气举排水采气技术,在蜀南气矿合江采气作业区二里场气田二6井进行试验并获得了成功。该项新技术的成功应用填补了国内空白。 作为排水采气工艺有效的后续工艺接替储备技术,球塞气举是排气工艺的新工艺技术。它采用Y型双管柱(一注一采) ,在注入气流中投入气举球作为气液相间的固体界面,实现了稳定的段塞流,有效地防止液体回落,降低滑脱损失、注气量,减少回压增大采气压差,加之换小油管,改善了常规连续气举的两相不稳定性,在极低的地层压力下能连续气举,提高举升效率,最终提高… 相似文献
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Shale Gas Well Completions and Maximizing Gas Recoveries 总被引:1,自引:0,他引:1
It is shown that stress fields within the earth are the principle control for hydraulic fracture direction in horizontal shale gas wells. Hydraulic fracturing is a process of increasing permeability within gas shales and involves a sophisticated organization of technology, good planning and proper management of equipment over a very short time period to be successful. The direction and extent of the induced fractures can be determined in near real-time at the well site via application of earthquake seismology theory in a now common process known as frac mapping. Next to the horizontal lateral azimuth, the total volume of slurry pumped into the well is a major factor in determining well EURs. Vertical fracture growth can be controlled and is important in concentration of the slurry within the main zone target zone that has the high TOC and porosity. Cemented casing with perforations is currently the most used method for zone isolation. New open-hole sleeve packers may eventually provide more flexibility in fracture design while also providing a means for refracturing multi-stage fractured horizontal wells, a technique not now commonly available. Multi-Stage fracture design requires incorporating rock properties with fracturing effect simulations and then verifying results using 3D reservoir simulations. Maximizing the gas recovery factors and EURs can be accomplished through use of closely spaced laterals with inter-fingered fracture stages and exploiting the stress shadow fracturing phenomenon. Even greater EURs may be possible if the wells can be refractured thereby opening up additional permeability channels. Shale gas development has progressed in an environmentally sensitive manner within the U.S. and will continue in this manner. During the past ten years, all of these technologies have been either newly developed or were the advancement of existing technology with modifications. The opportunity exists to take these proven technologies to other areas of the world for exploitation of shale gas reservoirs. 相似文献
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气藏水平井的水平井段长,穿越多个油气层,非均质性严重,不同位置泥浆浸泡时间不同,污染程度也不同。常规分段酸化工艺存在施工段数少、周期长、费用高、多次压井造成二次污染等问题。研制了气井不动管柱分段酸化完井一体化工艺管柱,该工艺管柱耐温110℃,耐压70MPa,通过投球、加压打开喷砂器滑套,可实现5个层段分段酸化施工。该管柱可作为完井管柱直接进行生产,减少压井作业的次数,降低压井液对储层的二次污染,有效提高单井产能。 相似文献
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