新疆阜康矿区煤层气双管柱筛管完井机理与适用性研究

doi:10.13809/j.cnki.cn32-1825/te.2022.04.011

Abstract

Abstract:

The coal reservoir in Fukang mining area of Xinjiang has different characteristics of large inclination angle, large thickness, multiple coal seams and complex structure, and the development progress of coalbed methane（CBM） in the mining area is slow. It is urgent to find a suitable integrated development technology for CBM geology engineering conditions to provide strong guidance for the development of CBM in Xinjiang. The dual-tubing screen completion technology integrates the completion and stimulation, and has promoted and applied more than 400 CBM horizontal wells in the Qinshui Basin. The dual-tubing screen completion technology has increased the production of CBM horizontal wells from four aspects, such as hydraulic impact, carrying pulverized coal, chemical gel breaking of drilling fluid, and stress permeation, so as to help the efficient development of CBM in Fukang mining area. Based on the technical characteristics of dual-tubing screen completion, the applicability and mechanism of this technology for the development of CBM in Fukang mining area is discussed from four advantages: reservoir coal body structure, reservoir permeability recovery, reservoir pore fracture expansion, and reservoir structure, and has guiding and reference significance for the efficient development of CBM under similar reservoir geological conditions in Xinjiang.

Key words: coalbed methane, Fukang mining area, dual-tubing, screen completion, adaptability study

CLC Number:

TE257

ZHANG Long,WANG Yibing,XIAN Bao’an,ZHANG Yafei,TAN Zhanglong,HAERHENG Tuersong,SUN Hao,WANG Guan,ZHANG Jintao. Applicability and mechanism of dual-tubing screen completion technology for Fukang Mining Area in Xinjiang[J].Petroleum Reservoir Evaluation and Development, 2022, 12(4): 633-642.

Figures/Tables 11

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References 34

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地层年代		地层符号	煤层编号	深度（m）	厚度（m）	煤体结构	稳定性	可采性
系	组	地层符号	煤层编号	深度（m）	厚度（m）	煤体结构	稳定性	可采性
侏罗系	西山窑组	J₂x¹	45	567.5	33.44	简单	稳定	局部可采
	八道湾组	J₁b³	A2	642.3	19.10	简单	较稳定	大部可采
		J₁b²	A5	815.9	12.40	简单	较稳定	大部可采
		J₁b¹	41	876.2	5.15	简单	稳定	局部可采
			42	904.6	26.54	简单	稳定	全区可采
			43	934.4	16.33	简单	稳定	大部可采

煤样区块	煤样取样地点	煤样类型	面割理密度（条/dm）	裂隙密度/（条/dm）	矿物充填情况
西部矿区	西山窑组45号煤层	半暗型和半亮型煤	4	30	局部充填
东部矿区	八道湾组煤层	半光亮型、亮煤	2	34	局部充填
中部矿区	八道湾组煤层	半光亮型、亮煤	2	20	大量充填

序号	破胶剂质量分数（%）	温度（℃）	表观黏度（mPa·s）						破胶率（%）
序号	破胶剂质量分数（%）	温度（℃）	0 min	1 min	2 min	3 min	5 min	10 min	破胶率（%）
1	0.000 1	15	12.50	1.75	1.75	1.75	1.25	1.00	92.0
2	0.000 1	15	13.50	3.00	2.50	1.75	1.75	1.50	88.9
3	0.000 1	15	13.75	3.00	2.50	1.75	1.75	1.75	87.3
4	0.000 1	15	13.50	3.00	2.50	1.50	1.50	1.50	88.9
平均值									89.3

样品编号	内压（MPa）	循环次数（次）	状态	总体积（mm³）	孔隙体积（mm³）	孔隙体积增加量（mm³）
1	15	15	实验前	75 638.20	244.99	40.78
1	15	15	实验后	75 638.20	285.77	40.78
2	7	1	实验前	69 416.92	762.29	201.65
2	7	1	实验后	69 416.92	963.94	201.65
3	9	5	实验前	72 176.23	118.43	40.68
3	9	5	实验后	72 176.23	159.11	40.68
4	9	10	实验前	75 039.65	1 981.81	155.30
4	9	10	实验后	75 039.65	2 137.11	155.30
5	12	15	实验前	75 212.96	1 938.00	85.82
5	12	15	实验后	75 212.96	2 023.82	85.82

Applicability and mechanism of dual-tubing screen completion technology for Fukang Mining Area in Xinjiang

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