As one of gas field producers located in South Sumatra Indonesia, the S field produced 70 MMSCFD as its peak production. It is a high pressure and high temperature gas impurities of 30% CO2 and 100-ppm H2S. The field has been producing since April 2010, with current recovery more than 50% of initial gas in place. Utilizing initial estimated OGIP (Original Gas In Place), the gas deliverability was predicted to last only until 2022. There are high uncertainties in estimating accurate reserves value due to lack of reservoir data such as reservoir pressure and SCAL (Special Core Analysis). Therefore, additional information such as SBHP (Static Bottom Hole Pressure) survey data and well optimization are essential to be conducted to narrow the uncertainties in reserves estimation and gas deliverability. Apparently, in 2018 and 2019 during CPP (Central Processing Plant) shut down for preventive maintenance activity, SBHP survey could be performed. Additional pressure data was utilized to update the OGIP analysis by combining several methods such as p/z analysis, flowing material balance, rate transient analysis and history matching of dynamic model analysis. The analysis shows conclusive result that there is significant increase in the OGIP and reserves, estimated 16% of additional gas reserves. To support enhance gas deliverability, the production network model was then created to evaluate existing production method. This updated system analysis showed significant bottleneck at the existing production system that limiting the production rate from the wells. As part of debottlenecking endeavor, temperature survey on the production system was employed to overcome the limited availability of pressure survey points in the system. Furthermore, the successful debottlenecking activity combined with temperature drop analysis resulted in 20% additional gas deliverability. This integrated evaluation and optimization also prolong the field lifetime until 2025. This paper describes some of the challenges and lessons learned during the evaluation and optimization in the high pressure and high temperature sour gas field.
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机译：作为位于南苏达特拉印度尼西亚南部的天然气田生产商之一，该领域生产了70毫米MMSCFD作为其峰值生产。它是30％CO 2和100ppm H 2 S的高压和高温气体杂质。该领域自2010年4月以来一直在生产，目前恢复超过50％的初始气体。利用初始估计的Ogip（原始气体），预计持续的气体可递送性直至2022.由于缺乏水库压力和尺度（特殊核心分析），估计准确的储备值具有很高的不确定性。因此，诸如SBHP（静态底部孔压力）测量数据和良好优化的附加信息对于缩小储存估计和气体可输送性的不确定性是必不可少的。显然，2018年和2019年在CPP（中央加工厂）期间关闭预防性维护活动，可以进行SBHP调查。通过组合诸如P / Z分析，流动的材料平衡，速率瞬态分析和动态模型分析的速率瞬态分析和历史匹配，利用额外的压力数据来更新OGIP分析。该分析显示了政治性结果，ogip和储备的显着增加，估计了额外的额外天然气储备。为了支持增强气体可传递能力，然后创建生产网络模型以评估现有的生产方法。该更新的系统分析显示了现有生产系统的显着瓶颈，这些生产系统限制了来自井的生产率。作为脱豆点的一部分，采用了对生产系统的温度调查来克服系统压力测量点的有限可用性。此外，成功的脱肉切除活性与温度下降分析相结合，导致20％的额外气体可输送性。这种综合评估和优化也延长了现场寿命直到2025年。本文介绍了在高压和高温酸气田中评估和优化期间所了解的一些挑战和经验教训。
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