Kedung Keris全井流管道光纤泄漏检测系统

C. Chairunissa, D. K. Amanu, G. Astari, Eska Indrayana
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摘要

Kedung Keris (KK)是印度尼西亚Cepu区块的一个含硫油田。KK油田最初计划有一个处理设施,有单独的管道来输送原油和采出水,而天然气则计划燃烧。为了降低成本,这一概念被转变为具有全井流管道的井垫,并以光纤泄漏检测传感系统(LDSS)的新技术作为关键推动因素。光纤LDSS的功能是利用连接在管道上的光纤电缆,通过实时分析泄漏和侵入的物理特征,如温度、压力、地面应变和声学的变化,来检测泄漏和侵入管道的权利。LDSS的实施,以及在管道设计、操作和维护中内置的其他保障措施,使KK项目省去了KK井场的分离设施和额外的输水管道。它还减少了数十亿标准立方英尺的天然气累积燃烧,直到PSC寿命结束,因为最初所有的天然气都计划燃烧。在2019年底启动KK项目后,KK项目概念的改变总共节省了数千万美元的总成本(约30%的资本支出+运营支出减少)。已安装的LDSS已被证明可以检测泄漏,定位精度可达几米,并具有入侵检测能力。KK项目率先为印尼石油和天然气公司实施光纤泄漏检测系统。这项工作为这种技术在全井流管道中的应用提供了进一步的见解,传统的泄漏检测系统实施将无法接受。连续地,全井流管道的部署可以提高设施项目设计和运营的CAPEX + OPEX效率,以及减少燃除的机会。
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Kedung Keris Full Well Stream Pipeline Fiber Optic Leak Detection System
Kedung Keris (KK) is a sour oil field based in Cepu Block, Indonesia. KK field was originally planned to have a processing facility with separate pipelines to deliver crude & produced water, while the gas was planned to be flared. To reduce cost, this concept was changed to a wellpad with full well stream pipeline with new technology of Fiber Optic Leak Detection Sensing System (LDSS) as a key enabler. The fiber optic LDSS functions by leveraging fiber optic cable attached to the pipeline to detect leak as well as intrusion to the pipeline's Right-of-Way through real-time analysis of physical characteristics of a leak and intrusion, such as changes in temperature, pressure, ground strain and acoustics. The implementation of LDSS, together with other safeguards built into the pipeline design, operations and maintenance, allowed the KK Project to eliminate the separation facility at KK wellpad and an additional water pipeline. It also reduces the flaring by billions of standard cubic feet of gas cumulative until end of PSC life as originally all gas planned to be flared. The change of KK Project concept altogether yielded tens of millions of US dollar gross cost savings (~30% of CAPEX + OPEX reduction) following the KK startup in late 2019. The installed LDSS proven to detect leak for up to few meters location accuracy and has intrusion detection capability. KK Project has pioneered the implementation of fiber optic leak detection system for Indonesia oil and gas companies. This work provided further insight to the utilization of such technology in full well stream pipeline where traditional leak detection system implementation will not be acceptable. Consecutively, full well stream pipeline deployment can lead to future CAPEX + OPEX efficiency in facility project design and operation, as well as flaring reduction opportunity.
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