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首页> 外文会议>SPE Middle East Unconventional Resources Conference >Understanding Unusual Diagnostic Fracture Injection Test Results in Tight Gas Fields-A Holistic Approach to Resolving the Data
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Understanding Unusual Diagnostic Fracture Injection Test Results in Tight Gas Fields-A Holistic Approach to Resolving the Data

机译：了解不寻常的诊断骨折注射测试导致狭窄的气田 - 解决数据的整体方法

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摘要

Hydraulic fracturing is a commonly used completion approach for extracting hydrocarbon resources from formations,particularly in those formations of very low permeability.As part of this process the use of Diagnostic Fracture Injection Tests(DFIT)can provide valuable information.When the measured pressures in such tests are outside the expected range for a given formation,a number of possibilities and questions will arise.Such considerations may include:What caused such inflated pressuresWhat is the in-situ stress stateWas there a mechanical or operational problemWas the test procedure or the test equipment at faultWhat else can explain the abnormal behaviourWhile there may not be simple answers to all of these questions,such an experience can lead to a technically inaccurate conclusion based on inadequate analysis. A recently completed project faced just such a challenge,initially resulting in poor hydraulic fracturing efficiency and a requirement to understand the root causes.In support of this,a thorough analysis involving a multi-disciplinary review team from several technical areas,including petrophysics,rock/ geo-mechanics,fluids testing/engineering,completions engineering,hydraulic fracture design and petro- leum engineering,was undertaken.This paper describes the evolution of this study,the work performed, the results and conclusions from the analysis. The key factors involved in planning a successful DFIT are highlighted with a general template and a work process for future testing provided.The importance of appreciating the impact of the drilling and completion fluids composition,their properties and their compatibility with the formation fluids are addressed.The overall process and technical approach from this case study in tight gas fields,will have applicability across similar fields and the lessons learned could help unlock those reserves that are initially deemed technically or even commercially unattractive due to abnormal or unexpected behaviour measured during a DFIT operation.
机译：液压压裂是一种常用的完成方法，用于从地层中提取烃资源，特别是在非常低的渗透性的结构中。该过程的一部分使用诊断骨折注射试验（DFIT）可以提供有价值的信息。在此类测量的压力测试超出了给定的形成的预期范围，将出现许多可能性和问题。可以包括：造成这种膨胀压力的考虑因素是原位应激状态在有机械或操作问题的情况下，测试程序或测试设备的原位应力状态。在故障中可以解释异常行为时可能对所有这些问题可能并不简单的答案，这种体验可以基于不足的分析来导致技术上不准确的结论。最近完成的项目面临着如此挑战，最初导致液压压裂效率不佳，并要求了解根本原因。在支持这一点，涉及多学科审查团队的彻底分析，包括岩石物理学，岩石/地理力学，液体测试/工程，完成工程，液压骨折设计和石油利用工程。本文介绍了本研究的演变，作品进行了演出，结果和结论。规划成功DFIT的关键因素是用一般模板突出的，并提供了未来测试的工作过程。欣赏钻井和完成流体组成的影响，它们的性质及其与地层流体的相容性的重要性。从这种案例研究的整体过程和技术方法在紧密的气田中，将在类似的领域进行适用性，并且所学的经验教训可以帮助解锁最初在技术上被视为的那些储备甚至是由于在DFIT操作期间测量的异常或意外的行为而被视为商业上没有吸引力。

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