平桥区块页岩气藏合理配产及关井恢复研究

Abstract

Abstract:

By the adjustment of the global energy consumption structure, the progress of shale gas exploration technology and the clean feature of shale gas, the rational development of shale gas reservoir has been the popular research direction. Therefore, how to make efficient and stable development plan of gas reservoir is very important. Taking the shale gas reservoir in Pingqiao as the research target, we established the horizontal fracturing well models with duel media by the software CMG to simulate the influence of the production allocation and recovery time after shut in on the development effect. The analysis suggests that different fracturing effects need different rational production allocation. The worse the fracturing reconstruction effect is, the lower the rational production will be, along with that are lower final recovery ratio and shorter stable production time. After the stable production period, the wells could be shut in for 20 ~ 30 days in order to recover the pressure and daily production. It is concluded that the allocation system and fracture effects affect mostly on the overpressure shale gas development. The key of the high and stable production is to improve the seepage capacity and reasonable distribution in the fracturing reconstruction region.

Key words: shale gas, proration, shut-in time, stable yield, numerical simulation

CLC Number:

TE122

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Zhang Lina,Liu Xin,Zhang Yaozu. Formulation of production plan in overpressure shale gas reservoir[J].Reservoir Evaluation and Development, 2018, 8(4): 73-76.

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Figures/Tables 7

Fig. 1

Relation between Shale gas development indicators and allocation system with different fractures"

Fig. 1

Fig. 2

Influence of different allocation system on daily gas production and pressure when xf=100 m"

Fig. 2

Fig. 3

Development effect comparison of different fracture in optimal allocation system"

Fig. 3

Fig. 4

Influence of different shut-in time on pressure when pressure drop half"

Fig. 4

Table 1

Influence of shut-in recovery time on develop index of gas reservoir"

参数	关井恢复时间/d	累产气量/ 10⁷m³	关井前压力/MPa	开井后压力/MPa	压力恢复水平,%
（压力降半）	0	8.962	18.04	18.04	0
	10	8.964	18.04	33.75	0.00
	20	8.968	18.04	34.14	41.34
	30	8.972	18.04	34.21	42.37
	40	8.974	18.04	34.25	42.55
	50	8.979	18.04	34.29	42.66
	60	8.985	18.04	34.34	42.76
（稳产结束）	0	8.962	3.12	3.12	42.89
	10	8.971	3.12	24.00	0
	20	8.978	3.12	24.66	54.95
	30	8.989	3.12	24.79	56.68
	40	8.996	3.12	24.87	57.03
	50	9.003	3.12	24.95	57.24
	60	9.004	3.12	25.02	57.45

Table 1

Fig. 5

Influence of optimal shut-in scheme of every group on differential pressure"

Fig. 5

Fig. 6

Fitting curves of production and pressure of well JY195HF"

Fig. 6

References 5

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[3]	孙海, 姚军 , YalchinEfendiev. 基于均化理论的页岩基岩运移机制尺度升级研究[J]. 中国科学:物理学力学天文学, 2017,47(11):119-128.
[4]	Adam M.Lewis andRichard G.Hughes, . Production data analysis of shale gas reservoirs[C]// paper SPE-116688-MS presented at the SPE Annual Technical Conference and Exhibition, 21-24 September 2008, Denver, Colorado, USA.
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