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首页> 外文会议>Society of Petroleum Engineers/International Association of Drilling Contractors Middle East Drilling Technology Conference and Exhibition >Utilization of Non-damaging Drilling Fluid Composed of Potassium Formate Brine and Manganese Tetra Oxide to Drill Sandstone Formation in Tight Gas Reservoir
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Utilization of Non-damaging Drilling Fluid Composed of Potassium Formate Brine and Manganese Tetra Oxide to Drill Sandstone Formation in Tight Gas Reservoir

机译：利用非损伤钻井液由甲酸盐盐水和锰四氧化碳组成，以钻砂岩形成在狭长的气体储层中

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An engineered fluid formulation was designed to provide a 114-pcf non-damaging drill-in fluid for the Unayzah A and B sandstone reservoirs. Employment of potassium formate high density brine and manganese tetra oxide weighting agent provided superior drilling properties that delivered reduced formation damage, improved thermal stability, and lower drilling costs. The use of acid-soluble manganese tetra oxide allowed engineers to increase the density of potassium formate drilling fluids and extend the density window above that offered by calcium carbonate. The reduced particle size (D50= 1 micron) and the spherical shape of the manganese tetra oxide reduced friction and drag. This improved control of equivalent circulating density (ECD) and plastic viscosity (PV) and significantly lowered rheological profiles. These optimal properties were maintained at temperatures exceeding 155°C. Laboratory testing confirmed high performance features such as: 1. Excellent hole cleaning characteristics 2. Thin filter cake with low lift-off pressures 3. Low differential sticking potential 4. Low treatment cost during drilling and re-use capability 5. Superior rheological performance compared to high solids content oil-based fluids 6. Improved drilling performance and hydraulic efficiency with the formate base system. The vertical well in the Unayzah A and B sandstone reservoirs was completed with zero hole problems. The potassium formate/manganese tetra oxide system provided superior performance and stability even with elevated bottomhole temperatures in the tight gas formation. This paper reviews the laboratory design and development as well as the field application of the high performance, brine-based drill-in fluid.
机译：设计了一种工程化的流体制剂，为UNAYZAH A和B砂岩储层提供了114pCF非损坏钻孔流体。培养基高密度盐水和锰四氧化锰加权剂的就业提供了优异的钻孔性能，其输送了形成损伤，改善了热稳定性和更低的钻井成本。允许工程师使用酸可溶性锰四氧化物的使用以增加矿物钻井液的密度，并延伸由碳酸钙提供的上述密度窗口。降低的粒径（D50 = 1微米）和锰四氧化物的球形形状降低了摩擦和阻力。这种改进的等效循环密度（ECD）和塑料粘度（PV）的控制和显着降低的流变谱。将这些最佳性质保持在超过155℃的温度。实验室测试确认了高性能特点，如：1。优异的孔清洁特性2.薄滤饼，具有低升降压力的滤饼3.低差动粘性电位4.钻井过程中的低处理成本5.比较优越的流变性能高固含量油基流体6.采用甲酸盐基础系统提高钻井性能和液压效率。 UNAYZAH A和B砂岩储层中的垂直井完成，零孔问题完成。即使在紧的气体形成中的井底温度升高，甲酸钾/锰四氧化物系统也提供了优异的性能和稳定性。本文综述了实验室设计和开发以及高性能盐水钻孔流体的田间应用。

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