煤层气压裂用低密度坚果壳支撑剂性能评价与现场试验

doi:10.13809/j.cnki.cn32-1825/te.2020.04.014

Abstract

Abstract:

At present, the clean quartz sand is used in the fracturing of southern Yanchuan CBM wells. According to the production effect in the early stage, the limited length of supporting seam generated by the clean quartz sand fracturing leads to the difficulty of adding sand in the construction, and the gas production effect in the later stage is not ideal. In order to solve this problem, laboratory experiments have been conducted to compare and evaluate the crushing and fracture conductivity of conventional quartz sand proppant and low-density nut shell proppant under different closing pressures. The experimental results show that the fracturing rates of both can meet the engineering requirements. Under high closure stress（35 MPa）, they have similar fracture conductivity. However, low-density nut shell proppant is cheaper than traditional quartz sand. Therefore, low-density nut shell proppant is more able to meet the current goal of cost reduction and production increase. The field test of this technology has obtained good results.

Key words: coal bed methane, low-density, proppant, fracturing, nut shell

CLC Number:

TE357.12

WEI Wei. Performance evaluation and field test of low-density nut shell proppant in CBM fracturing[J].Reservoir Evaluation and Development, 2020, 10(4): 93-96.

Figures/Tables 5

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References 20

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支撑剂类型	粒径范围/ μm	视密度/（g?cm^-3）	体积密度/ （g?cm^-3）	浊度/ %	圆度	球度
石英砂	425~850	2.62	1.63	41	0.83	0.78
低密度坚果壳	425~850	1.21	0.66	55	0.66	0.66

支撑剂类型	粒径范围/μm	破碎率（28 MPa）/%
石英砂	425~850	8.0
低密度坚果壳	425~850	2.6

Performance evaluation and field test of low-density nut shell proppant in CBM fracturing

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