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首页> 外文会议>SPE Russian Petroleum Technology Conference and Exhibition >Analysis of Efficiency of Horizontal Drilling in Low-Permeability Reservoirs at the Fields of LLC LUKOIL-Western Siberia with Oil-Based Drilling Fluids
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Analysis of Efficiency of Horizontal Drilling in Low-Permeability Reservoirs at the Fields of LLC LUKOIL-Western Siberia with Oil-Based Drilling Fluids

机译：利用油基钻井液，LLC卢诈 - 西伯利亚田间水平钻井效率分析

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The rate of hard-extractive oil reserves in Western Siberia increases every year. Majority of new fields and developed objects, have low permeability reservoirs with deteriorated reservoir properties. LUKOIL- Western Siberia actively implements various technologies to improve the efficiency of hard-extractive reserves deposits development, increasing the rate of oil extraction in the company and oil cost reduction, including: 1. horizontal well drilling with multi-zone fracturing; 2. multilateral horizontal well drilling with 2-5 branches; 3. new types of drilling fluids (including oil-based). This study reveals the estimation of the oil-based drilling fluids efficiency for productive formation drilling in horizontal multilateral wells. The study also gives the comparative analysis of technical and economic parameters of drilling and indicators of operation (productivity) for multilateral wells drilled in oil-based and water-based solutions, as well as horizontal wells drilled with water-based solutions, with multi-zone fracturing. Drilling fluids have least negative impact on oil and gas reservoirs characteristics; they have high temperature resistance, inertness against clays and salts, good lubricity. However, the cost of such drilling fluids is quite high, they are flammable and dangerous for environment. International and Russian experience of oil-based mud usage indicates the increase of technical and economic parameters of drilling, due to the differential sticking risk reduction, reduction of drilling loads due to the lower friction coefficient, which generally contributes to the penetration rate and commercial drilling speed. Furthermore, lack of negative effects of the hydrocarbon-based fluids on clay minerals within the collector, and least filtration leads to primary opening quality improvement. Test results for the oil-based muds at productive formation opening on the fields of LLC "LUKOIL- Western Siberia" showed a 30% penetration rate increase in experimental wells, compared to neighboring, drilled with basic water-based muds. While drilling the horizontal section with hydrocarbon-based fluids there was no unproductive time associated with drilling fluids. Average experimental multilateral well produced oil flow rate higher by 30%, compared to the results obtained in horizontal wells with multi- zone hydraulic fracturing. Average oil production rate in multilateral wells drilled with oil-based fluids was higher by 20% than that of multilateral wells drilled on standard water-based solutions.
机译：西伯利亚西伯利亚的硬萃取油储量每年都会增加。大多数新的领域和开发的物体，具有低渗透储层，储层性能恶化。西伯利亚卢博利 - 西伯利亚积极实现各种技术，以提高硬度储量储量稳定性的发展，提高公司的石油提取率和石油成本减少，包括：1。用多区压裂横向钻井; 2.具有2-5分支的多边水平井钻孔; 3.新型钻井液（包括油基）。本研究揭示了水平多边井中生产性形成钻井的油基钻井液效率的估计。该研究还提供了用于油基和水基解决方案中钻取的多边井的钻井技术和经济参数的比较分析，以及用水性解决方案钻出的水平井，具有多重区域压裂。钻井液对油气储层的影响最小;它们具有高耐温性，对粘土和盐的惰性，良好的润滑性。然而，这种钻井液的成本非常高，它们对环境感到易燃和危险。国际和俄罗斯的石油泥浆用法经验表明钻井技术和经济参数的增加，由于差动粘性风险降低，由于摩擦系数较低，钻孔负荷减少，这通常有助于渗透率和商业钻井速度。此外，在收集器内的粘土矿物上缺乏烃类流体的负面影响，并且最小过滤导致初级开口质量改善。与邻近的基于基于水性泥浆的钻井相比，在LLC“Lukoil-expere Siberia”领域的石油泥浆上的石油基泥浆的测试结果显示了70％的实验井的渗透率增加。在钻出碳氢化合物的流体的水平部分时，没有与钻井液相关的非生产性时间。平均实验多边井产生的油流量较高30％，与水平井中获得的结果相比，具有多区液压压裂。使用油基流体钻出的多边井中的平均石油生产率高于标准水基溶液中钻孔的多边孔的20％。

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