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首页> 外文会议>SPE Western Regional Meeting >Application of Micro-Proppant to Enhance Well Production in Unconventional Reservoirs: Laboratory and Field Results
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Application of Micro-Proppant to Enhance Well Production in Unconventional Reservoirs: Laboratory and Field Results

机译：微型支撑剂在非传统水库中提升良好生产的应用：实验室和现场结果

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As more wells are drilled and completed in tight, brittle formations, operators rely more on small-sized proppants to help ensure the created complex fractures are propped, and to maintain conductive flow paths for production. Most microfractures generated in the far-field away from the primary fracture branches are believed to return to a closed state soon after the release of hydraulic pressure, unless propping agent has been successfully placed inside such fractures. This paper presents the results of laboratory study, numerical modeling, and field trials, to demonstrate and quantify the effectiveness of a new treatment method for enhancing conductivity of microfractures and primary fractures formed in tight formations, thus helping improve well production. The approach involves using a micro-proppant (MP) and an aqueous-based surface modification agent (ASMA) as part of the pad fluid stage to treat fracture faces of microfractures and leakoff induced fractures before placement of larger-sized proppant into the primary fractures. This coating causes the proppant particulates to adhere to the created fracture faces by forming partial monolayer, thus mitigating settling and enhancing vertical distribution in the fractures. During experimental testing, various shale core samples were split along the core length to create artificial fracture faces. These fracture faces were then exposed to MP or proppant slurry treated with an ASMA, and were then reassembled for core flow testing under closure stress. An effective permeability comparison of the fractured cores, with and without ASMA treated MP or proppant, demonstrated a dramatic effective permeability increase in fractures of the treated cores. Field treatments involved injection of pad fluid containing a low concentration of MP, with and without treating with ASMA in offset wells, to treat the microfractures formed in the far-field regions. Proppant slurry of larger size particulates (100-mesh and larger) then followed to prop the primary fractures and their branches. Production from wells treated with MP have shown to provide significant improvement in terms of liquids production compared to the production of control wells. Reservoir simulation performed in this complex retrograde condensate reservoir supports this result, with sensitivity testing showing that increasing the connected fracture area enables the production of more hydrocarbon liquids at higher sustained production rates.
机译：随着井的钻井并以脆弱的形成钻井，脆弱的形成，运营商更多地依赖小型支撑剂来帮助确保所产生的复杂骨折是支撑的，并保持生产的导电路径。除非在液压释放之后，否则在初级骨折分支中产生的大多数微型裂缝在远离初级骨折分支的远离初级骨折分支中，除非预防剂已成功置于这种骨折内。本文介绍了实验室研究，数值建模和现场试验的结果，证明了新的处理方法的有效性，以提高微磨损和在紧密形成中形成的初级骨折的导电性，从而有助于提高良好的生产。该方法包括使用微支链剂（MP）和基于水性的表面改性剂（ASMA），作为垫流体级的一部分，以在将更大尺寸的支撑剂放入初级骨折之前处理微磨损和泄漏诱导的裂缝的骨折面。该涂层使支撑剂颗粒通过形成部分单层粘附到产生的骨折面上，从而减轻沉降并增强裂缝中的垂直分布。在实验测试期间，各种页岩芯样品沿着芯长分开以产生人造裂缝面。然后将这些骨折面暴露于用ASMA处理的MP或支撑剂浆料，然后重新组装用于闭合应力下的核心流动测试。裂缝核心的有效渗透性比较，具有和没有ASMA处理的MP或支撑剂的损伤芯，证明了经处理的核心裂缝的显着渗透性。现场处理涉及注射含有低浓度MP的垫流体，在偏移孔中具有和不用ASMA处理，以治疗在远场区域中形成的微磨料。然后，高尺寸的颗粒（100目和更大）的支撑剂浆液，然后遵循初级骨折及其分支。通过MP处理的孔的生产表明，与对照孔的生产相比，液体生产方面提供了显着的改善。在该复杂的逆行冷凝水储存器中进行的储层模拟支持该结果，具有灵敏度测试，表明增加了连接的断裂区域使得能够在较高持续的生产速率下生产更多的烃液体。

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