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Methods and apparatus for estimating physical parameters of reservoirs using pressure transient fracture injection/falloff test analysis
Methods and apparatus for estimating physical parameters of reservoirs using pressure transient fracture injection/falloff test analysis
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机译:利用瞬态压裂裂缝注入/沉降试验分析估算储层物理参数的方法和装置
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摘要
A before-closure pressure-transient leakoff analysis for a fracture-injection/falloff test is used to mitigate the detrimental effects of pressure-dependent fluid properties on the evaluation of physical parameters of a reservoir. A fracture-injection/falloff test consists of an injection of liquid, gas, or a combination (foam, emulsion, etc.) containing desirable additives for compatibility with the formation at an injection pressure exceeding the formation fracture pressure followed by a shut-in period. The pressure falloff during the shut-in period is measured and analyzed to determine permeability and fracture-face resistance by preparing a specialized Cartesian graph from the shut-in data using adjusted pseudodata such as adjusted pseudopressure data and time as variables in a first method, and adjusted pseudopressure and adjusted pseudotime data as variables in a second method.
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