Optimization of Key Fracturing Parameters for Profitable Development of Horizontal Wells in Mahu Conglomerate Reservoirs

doi:10.7657/XJPG20230208

Abstract

Abstract:

In the process of transforming the Mahu conglomerate reservoirs in the Junggar basin from large-scale development to profitable development，it is particularly important to select reasonable fracturing parameters under the premise of considering economic benefits. In order to realize the optimization of key fracturing parameters for the Mahu conglomerate reservoirs，an equivalent KGD fracture propagation model was established to realize the rapid estimation of fracture shape. By using the heuristic particle swarm optimization algorithm and taking the rate of return as the objective function，a combined optimization on fracturing scale, cluster number and displacement was carried out for pay zones in the Mahu conglomerate reservoirs. The optimization results show that with the increase of the iteration number，the high-cost development plan finally converges to a combined optimization plan with the best comprehensive development effect，thus enabling the optimization of fracturing parameters for Ma 131 block.

Key words: Junggar basin, Mahu conglomerate reservoir, horizontal well fracturing, fracturing parameter, optimization, particle swarm optimization algorithm, rate of return, profitable development

CLC Number:

TE323

ZHANG Jing, HU Dandan, QIN Jianhua, WANG Yingwei, TANG Huiying. Optimization of Key Fracturing Parameters for Profitable Development of Horizontal Wells in Mahu Conglomerate Reservoirs[J]. Xinjiang Petroleum Geology, 2023, 44(2): 184-194.

Figures/Tables 17

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Table 6.

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参数	取值
基准折现率/%	10.50
天然气售价/（元·10^-3 m^-3）	820
天然气商品率/%	95
原油售价/（元·t^-1）	2 560（2019年—2021年） 2 805（2022年—2034年）
原油商品率/%	99.10
钻井成本/（元·m^-1）	4 061
与注液量有关的完井成本/（元·m^-3）	60
压裂服务费/（元/段）	190 000
其他完井成本/元	7 496 583
其他初期投资/元	9 500 000
资源税/%	6
增值税/%	6
单井维护总成本/元	500 000
天然气开采成本/（元·10^-3 m^-3）	143
原油开采成本/（元·t^-1）	290
水处理成本/（元·m^-3）	22.50

井名		支撑裂缝占比/%	层位	井距/m	段数	段内簇数	单段压裂规模/m³	收益率/%
M1247井	文献计算值		$T_{1}b_{3}^{2}$	100	30	3	733	10.80
	本文计算值	50	$T_{1}b_{3}^{2}$	100	30	3	733	8.77
		70	$T_{1}b_{3}^{2}$	100	30	3	733	10.44
		90	$T_{1}b_{3}^{2}$	100	30	3	733	14.27
M1242井	文献计算值		$T_{1}b_{2}^{1}$	150	30	3	1 300	11.30
	本文计算值	50	$T_{1}b_{2}^{1}$	150	30	3	1 300	7.41
		70	$T_{1}b_{2}^{1}$	150	30	3	1 300	11.46
		90	$T_{1}b_{2}^{1}$	150	30	3	1 300	14.57

层位	孔隙压力/ MPa	含水饱和度/ %	孔隙度/ %	气测渗透率/mD	液测渗透率/mD	气油比	饱和压力/ MPa	杨氏模量/ GPa	泊松比
$T_{1}b_{3}^{1}$	36.56	97	6	0.09	0.004	235	34.66	29.10	0.25
$T_{1}b_{3}^{2}$	36.84	46	10	2.23	0.111
$T_{1}b_{3}^{3}$	37.29	80	9	1.74	0.087
$T_{1}b_{2}^{1}$	37.29	52	11	2.48	0.120	140	23.97	29.10	0.22
$T_{1}b_{2}^{2}$	37.77	87	11	1.48	0.074	140	23.97	29.10	0.22