基于主成分分析法的煤层气井压裂造缝效果评价

doi:10.11799/ce201802036

Abstract

Abstract: Fracture-forming effect evaluation in CBM well has not formed a complete and mature evaluation system and industry standards currently. It is necessary to study the effect of hydraulic fracturing on the specificity of coal reservoirs and technologies. This paper has analyzed the geological and technological factors effected the fracture-making, and some index has been preliminarily selected, they were the strength coefficient of the coal rock, buried depth, number of natural fissure, length of fracture, fracturing pump, pressure, time and fluid viscosity. The principal component analysis method was applied to pick up three principal components from the multi-indexes and the three principal component property factor of the coal reservoirs mechanism, the natural fracture and hydraulic fracturing technology factor which could instead the 68 percent of total index information. Finally, according to the weight sum of the principal component score, the value range of each index under the best effect of fracture-making could be scientifically predicted, and objective and reliable basis for CBM development and utilization in the future can be provided.

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An assessment of fracture-making effect in hydraulic fracturing of CBM well based on principle component analysis

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