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首页> 外文会议>Abu Dhabi International Petroleum Exhibition and Conference >Geomechanical Mechanism of Hydraulic Fracturing and Fracability Evaluation of Natural Fractured Tight Sandstone Reservoir in Keshen Gasfield in Tarim Basin
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Geomechanical Mechanism of Hydraulic Fracturing and Fracability Evaluation of Natural Fractured Tight Sandstone Reservoir in Keshen Gasfield in Tarim Basin

机译：塔里木盆地凯伦气田天然骨折紧密砂岩水库水力压裂和可脱离脱水性评价的地质力学机制

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摘要

Keshen gas field, located in Kuqa Depression of Tarim Basin, northwest China, is an ultra-deep (7000m), high pressure and high temperature fractured tight sandstone gas reservoir with low permeability of 0.09mD and strong stress anisotropy about 30 MPa in horizontal stress contrast. For economic development, hydraulic fracturing is necessary in this reservoir. To understand the mechanism of hydraulic fracturing and evaluate the fracability and fracture this reservoir efficiently, an integrated research has been conducted. We established a georrtechanical model which described vertical and horizontal distribution of the geomechanical parameters in this reservoir. A fracturing experimental simulation was conducted with large size rock samples to analyze the interactive relationship between natural fractures and hydraulic fractures during fracturing. We also carried out a sensitive study to comfirm the key parameters for optimizing fracturing treatment design. Finally a new fracablity index calculation method suitable for fractured tight sandstone was built.
机译：位于中国西北部塔里木盆地的Kuqa凹陷的Keshen Gas Filum是一种超深（7000米），高压和高温裂缝的紧密砂岩燃气储层，其水平应力下的低渗透率和强大的应力各向异性约30MPa对比。对于经济发展，该水库需要液压压裂。为了了解液压压裂的机制，并有效地评估脱水性和裂缝骨折，进行了综合研究。我们建立了一种良好的力学模型，描述了该储层地质力学参数的垂直和水平分布。用大尺寸岩石样品进行压裂实验模拟，以分析压裂期间自然骨折与水力骨折之间的互动关系。我们还进行了一个敏感的研究，以确认优化压裂处理设计的关键参数。最后建造了一种新的脆弱性指数计算方法，适用于裂缝紧密砂岩。

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