大牛地气田多簇压裂产能影响因素分析及裂缝参数优化

Abstract

Abstract:

The He-1 layer of Daniudi gas field belongs to the low porosity and low permeability gas reservoir. As for this, we mainly used the packer fracturing technology in the open hole, and achieved great results. In order to make full use of the low grade gas reservoirs, the horizontal wells of this gas field has been studied by the multi-cluster fracturing technology. By establishing the model of the horizontal wells productivity with the multi-cluster fracturing and using the Eclipse numerical simulation software, the geological factors and the fracture factors that affect the productivity of the horizontal wells were analyzed. Meanwhile, the orthogonal test design method was used to analyze the weight of the influence factors of the production capacity to determine the main influence factors and then optimize the design parameters of the fracturing. The application effect showed that the multi stage fracturing significantly improved the well production.

Key words: Daniudi, horizontal well, multi-cluster fracturing, productivity influencing factor

CLC Number:

TE357

Xinchun Zhu. Analysis of productivity influencing factors and optimization of fracture parameters for multi-cluster fracturing[J]. Reservoir Evaluation and Development, 2018, 8(2): 58-62.

Figures/Tables 12

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References 9

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指标	极差/10⁷m³	关联度,f
地层厚度	1.651	0.670 6
地层渗透率	1.427	0.655 1
裂缝段间距	0.797	0.652 4
裂缝半长	0.29	0.638 9
裂缝导流能力	0.106	0.627 4

井组	井名	水平段长/m	气厚/m	显示钻遇率,%	平均全烃,%	段数/簇数	单段加砂/m³	无阻流量/(10⁴m³·d^-1)
DN1	DNP1	1 200	541	45.1	11.6	8/15	49.5	12.47
	DNP2	1 201	672	56.0	34.9	7	40.4	4.17
	DNP3	1 200	630	52.5	28.4	9	40.3	1.61
	DNP4	800	192	24	22.8	7	31	2.45
DN5	DNP5	1 106	439	39.7	47.2	7/11	51.94	13.7
	DNP6	1 200	403	33.6	17.2	8	45.1	10.56
	DNP7	1 028	428	41.6	23.7	7	36.1	11.67

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Analysis of productivity influencing factors and optimization of fracture parameters for multi-cluster fracturing

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参数水平	地层厚度/m	地层渗透率/10^-3μm²	裂缝段间距/m	裂缝半长/m	裂缝导流能力/(μm²·cm)
1	6	0.3	100	50	10
2	9	0.4	120	100	20
3	12	0.5	140	200	30
4	15	0.6	160	300	40