为了加强从煤层中提取甲烷气体,采用水力压裂技术。然而,软岩中的增产作业,比如煤层,与主要与嵌入现象有关的技术问题有关。因此,介绍了一种新型焦炭基支撑剂的概念。该研究的目的是确定用于进一步加工以获得支撑剂的源焦炭材料。二十种不同类型的焦炭材料,晶粒尺寸,并对5家焦化厂的生产方法进行了测试。对于初始焦炭确定以下参数的值:云母指数40;云母指数10;焦炭反应性指数;反应后的焦炭强度;和灰分含量。通过破碎和机械分级对焦炭进行了改性,并获得3-1毫米级。其富含密度为1.35g/cm3的重质液体。抗压碎指数和Roga指数,被选为关键强度参数,并测定较轻部分的灰分含量。从粗粒(25-80mm及以上)高炉和铸造焦炭中获得了具有最佳强度性能的最有前途的改性焦炭材料。他们的抗压碎指数和Roga指数值至少为44%和至少96%,分别,并且含有不到9%的灰分。在评估焦炭材料在煤水力压裂中用于支撑剂的适用性之后,需要进一步的研究来开发一种技术来生产参数符合PN-ENISO13503-2:2010标准的支撑剂。
To enhance the extraction of methane gas from coal beds, hydraulic fracturing technology is used. However, stimulation operations in soft rocks, such as coal beds, are associated with technical problems related mainly to the embedment phenomenon. Therefore, the concept of a novel
coke-based proppant was introduced. The purpose of the study was to identify the source
coke material for further processing to obtain a proppant. Twenty coke materials differing in type, grain size, and production method from five coking plants were tested. The values of the following parameters were determined for the initial coke: micum index 40; micum index 10;
coke reactivity index;
coke strength after reaction; and ash content. The
coke was modified by crushing and mechanical classification, and the 3-1 mm class was obtained. This was enriched in heavy liquid with a density of 1.35 g/cm3. The crush resistance index and Roga index, which were selected as key strength parameters, and the ash content were determined for the lighter fraction. The most promising modified coke materials with the best strength properties were obtained from the coarse-grained (fraction 25-80 mm and greater) blast furnace and foundry
coke. They had crush resistance index and Roga index values of at least 44% and at least 96%, respectively, and contained less than 9% ash. After assessing the suitability of coke material for proppants in the hydraulic fracturing of coal, further research will be needed to develop a technology to produce proppants with parameters compliant with the PN-EN ISO 13503-2:2010 standard.