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首页> 外文会议>SPE annual technical conference and exhibition >Modern Concepts in Perforation Inflow Diagnostic (PID) Testing: A Safe, Green, and Cost-Effective Technique for Evaluating Pre-Frac Reservoir Parameters
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Modern Concepts in Perforation Inflow Diagnostic (PID) Testing: A Safe, Green, and Cost-Effective Technique for Evaluating Pre-Frac Reservoir Parameters

机译：射孔流入诊断（PID）测试中的现代概念：一种安全，绿色且具有成本效益的技术，用于评估压裂前储层参数

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Conventional completions and testing methods of low permeability gas reservoirs involve the cost and logistics of balanced and underbalanced perforating, next day stimulation treatment, surface production equipment, and the need for flaring during clean-up operations. In Canada, due to government regulations, operators will conduct the buildup test immediately after one or two day of clean-up operation. This practice has resulted in post-frac welltest analysis being masked by fracture fluid still present in the proppant pack and formation, resulting in misleading estimates of reservoir and fracture parameters important for production forecasting and completion evaluation. Perforation Inflow Diagnostic, referred as PID testing, is a modern testing technique designed to deliver in a costeffective manner valuable reservoir information such as: reservoir pressure, formation flow capacity, unstimulated gas inflow rate potential and near wellbore damage conditions prior to the fracture treatment. The advantages of PID testing are numerous: capability of accurate measurement of very low gas rates in low permeability (tight) gas wells (often reported as too small to measure), provides a safe testing environment, ensures secrecy and it defines itself as a green well testing procedure since it does not require flaring or venting of natural gas. PID testing is simply the surface and/or subsurface monitoring of the pressure response following extreme underbalanced perforating conditions, using electronic pressure recorders capable of high sampling rate. Unlike conventional testing procedures, the surface valve is closed during the entire test period and the formation fluids are produced into the closed chamber (casing and/or tubing volume). The measured pressures are converted to corresponding gas rates, based on the well-established closed chamber theory. PID testing therefore allows the collection of pressure and rate data required to derive the in-situ matrix permeability, wellbore skin and reservoir pressure.
机译：低渗透性气藏的常规完井和测试方法涉及平衡和欠平衡射孔的成本和后勤费用，第二天的增产措施，地面生产设备以及清理作业中扩口的需求。在加拿大，根据政府法规，操作员将在清理操作进行一到两天后立即进行集结测试。这种做法导致压裂后的试井分析被支撑剂充填层和地层中仍然存在的压裂液所掩盖，从而导致对储层和压裂参数的误导性估算，这对产量预测和完井评估很重要。 射孔流入诊断，称为PID测试，是一种现代测试技术，旨在以经济有效的方式提供有价值的储层信息，例如：压裂之前的储层压力，地层流量，未激发的天然气流入量潜力和井眼附近的破坏情况。 PID测试的优点很多：在低渗透率（密实）气井中准确测量非常低的气体速率的能力（通常报告称测量得太小），提供了安全的测试环境，确保了保密性，并且将其定义为绿色井测试程序，因为它不需要燃烧或排放天然气。 PID测试只是使用能够实现高采样率的电子压力记录仪，对极端欠平衡的射孔条件后的压力响应进行表面和/或地下监测。与常规测试程序不同，地表阀在整个测试期间都是关闭的，地层流体会进入封闭的腔室（套管和/或油管容积）。根据公认的密闭室理论，将测得的压力转换为相应的气体速率。因此，PID测试允许收集压力和速率数据，以得出原位基质渗透率，井眼表皮和储层压力。

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