悬筛评价解锁边缘砂质储层——以印尼Peciko气田为例

Danny Hidayat, R. Marindha, Triantoro Ade Nugroho, R. Hidayat, R. K. Rusdi
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引用次数: 0

摘要

Peciko油田目前生产的天然气来自多层易出砂的浅层储层。因此,需要采用防砂方法,通过低成本的干预措施来解锁这些边缘储层。悬挂筛管被认为是最小化防砂成本,同时保持其稳健性以最大化采收率的替代解决方案。本文将介绍和评估Peciko油田从地下到地面元件的悬挂筛安装和性能。Peciko悬挂筛的实施将根据其在生产阶段的安装难易程度和性能进行评估。Peciko井配备了实时监测系统,包括声波探砂器。因此,砂问题可以很容易地识别。筛管故障的任何迹象都将通过检查地面设备(如扼流圈和侵入式探头)来确认。进一步的干预可以回收筛管,并在地面进行目视检查,以扩大验证范围。将收集过滤器尺寸、放置方法、清理和砂筛结果,以确定根本原因,并确定采用悬挂筛作为可靠防砂方法的最佳方法。2019年的9次安装表明,筛管堵塞、液体加载以及两者的结合是生产阶段的主要问题。在Fx井和E2x井的3个封堵案例中,研究人员发现,过大的压降压力会导致射孔通道内的气速过高,导致出砂过多,堵塞了筛管。这些案例也证明,如果不仔细监测压降压力和产气量,节流器运动的自卸可能导致堵塞。当储层压力下降,多个储层同时产出液体时,Ax油田的混采就成为举升性能的一个问题。有限的压降压力使得较小的气流量能够提升液体,使井容易因液体加载而死亡。E2x和E2y井的大量出砂导致沉积物顶部(TOS)增加,即使多次尝试出砂,也无法进入筛管。筛管设计、节流器配置、适当的清理和连续监测是筛管安装前后的关键步骤,以维持生产寿命。在浅层油藏中,悬挂筛管平均每口井的权益为0.2亿立方英尺,已被证明可产生67%的井储量。由此得出结论,悬挂筛管是一种经济可行的防砂方法,可以在Peciko油田实施。
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Hanging Screen Evaluation to Unlock Marginal Sandy Reservoir: Case Study of Peciko Gas Field, Indonesia
Peciko Field currently produces gas from multilayer sand-prone shallow reservoirs. Therefore, it needs sand control method to unlock these marginal reservoirs through low-cost intervention. Hanging screen has been reviewed as an alternative solution to minimize sand control cost while maintaining its robustness to maximize the recovery. This paper will present and evaluate the hanging screen installation and performance from subsurface to surface elements in Peciko field. Hanging screen implementation in Peciko will be evaluated in terms of ease of installation to its performance during production phase. Peciko wells are equipped with real-time monitoring system including Acoustic Sand Detector. Therefore, sand problems could be easily identified. Any indication of screen failure will be confirmed by checking the surface equipment like chokes and intrusive probes. Further intervention to retrieve the screen and perform visual check at surface can be executed to extend the verification. Filter size, placement method, clean-up, and sand sieve result will be gathered to identify the root cause and determine the best method to apply hanging screen as reliable sand control method. Nine installations in 2019 conclude that screen plugging, liquid loading, and combination of both are main issues in production phase. With three plugging cases from well Fx and E2x, it was found that excessive drawdown pressure triggers high gas velocity in perforation tunnel and causing excessive sand production that plugged the screen. These cases also prove that self-unloading by choke movement can lead to plugging if the drawdown pressure and gas rate are not monitored carefully. Commingle production in Ax becomes an issue in lifting performance when reservoir pressure declines and liquid was produced from several reservoirs. Limiting drawdown pressure gives smaller gas rate to lift the liquid and make the well died from liquid loading easily. Massive sand production in well E2x and E2y cause an increase in Top of Sediment (TOS) and lead to inaccessible screen even with multiple bailing attempts. A series of screen design, choke configuration, proper clean-up and continuous monitoring are critical steps to be performed prior and after screen installation to maintain production lifetime. With average stakes of 0.2 Bcf per well, hanging screen has proven to produce 67% of the well reserves in shallow reservoirs. This value creation led to the conclusion that hanging screen is an economically-feasible-sand control method to be implemented in Peciko.
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