浅层致密油藏空间编织井网开发数值模拟研究

doi:10.13809/j.cnki.cn32-1825/te.2021.06.015

Abstract

Abstract:

In shallow tight reservoirs, the hydraulic fracturing tends to produce horizontal fractures. For the horizontal wells, multi-stage fracturing is easy to generate only one large horizontal fracture, which leads to poor stimulation effect. However, the single well mode of “bow-shape horizontal well + multi-stage horizontal fractures” can not effectively explore this kind of reservoir. In order to further improve the production degree of shallow tight reservoir, the development mode of spatial-braided well pattern in shallow tight reservoir is proposed based on the feasibility of shallow reservoir drilling, and the numerical simulation is used to verify the effectiveness of spatial-braided well pattern. The numerical simulation results show that under the same number of wells and drilling footage, the oil production, cumulative oil production and reservoir recovery degree of spatial-braided well pattern are higher than those of the opposite well pattern and staggered well pattern. However, with the expansion of the fracture scale in horizontal fracturing, the gap with staggered well pattern decreases. At the same time, according to the simulation, the reverse 7-point pattern water injection not only replenishes the formation energy, but also changes the seepage state, so that the remaining oil in the regional edge and between wells can be effectively displaced, and the recovery rate is significantly improved. The researches provide efficient development method for the efficient development of shallow tight reservoir.

Key words: shallow reservoir, tight reservoir, horizontal well, bow-shape well, spatial-braided well pattern

CLC Number:

TE349

FENG Ning,PENG Xiaolong,XUE Xiaojun,WANG Chaowen,DENG Peng,WU Haoqiang. Numerical simulation of spatial-braided bow-shape well pattern development in shallow tight reservoir[J].Petroleum Reservoir Evaluation and Development, 2021, 11(6): 897-904.

Figures/Tables 12

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References 29

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物性参数	参数值	物性参数	参数值
储层顶深（m）	500	孔隙度（%）	9
储层厚度（m）	12	渗透率（10^-3μm²）	0.9
地层压力（MPa）	4.95	地层水黏度（mPa·s）	1
地层原油密度（g/cm³）	0.83	地层水压缩系数（MPa^-1）	0.000 05
地层原油黏度（mPa·s）	4.29	地层水压缩系数（MPa^-1）	0.000 05
地层原油体积系数	1.036	原油压缩系数（MPa^-1）	0.000 2

Numerical simulation of spatial-braided bow-shape well pattern development in shallow tight reservoir

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