裂缝性注水开发油藏多轮次调剖机理研究

Abstract

Abstract:

In order to discuss the technical measures of the multi-directional water breakthrough, it is essential to find out the water breakthrough discipline and the understand the mechanism of the multi-round profile control technique. Therefore, we designed and the established the fracture-matrix visualization model with one-injection well for three production wells. The permeability between the different injection-production ends was inequality. By this model, we studied the migration characteristics and the plugging mechanism of the gel, the fluid diverting of subsequent water flooding and the distribution characteristics of the residual oil on the condition of the fracture-matrix. Through the core flow experiment of the shunt-wound sand-filled pipes with different permeability. And by the simulation of the interlayer heterogeneity, we compared the experimental data of the single and multi-round profile control measures. The results show that the multi-round profile control can fully play the synergistic effect to improve the performance and plug the fractured seepage channel effectively along with the promotion of the fluid diverting, and the profile control effect reduces with time of the injection. The multi-round profile control technique is better than the single profile control technique in the respect of adapting the fractured geological structure, and has a better effect on relieving the interlayer contradiction.

Key words: fractured reservoir, physical simulation, visualization model, multi-directional water breakthrough, multi-round profile control, EOR

CLC Number:

TE357

Tao He,Jian Wang,Heng Yu, et al. Mechanism study on multi-round profile control technique in fractured water flooding reservoir[J]. Reservoir Evaluation and Development, 2018, 8(2): 68-72.

Figures/Tables 7

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Table 1

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References 10

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调剖轮次	采油量/mL			采收率,%
调剖轮次	上端	下端	左端	采收率,%
水驱	11	4	41	25.7
第一轮	14	9	8	14.2
第二轮	12	8	3	10.6
第三轮	5	3	1	4.1
总计	42	24	53	54.6

填砂管编号	渗透率/ μm²	水驱(调剖前) 相对吸水量,%	单次调剖后相对吸水量,%
1#	7.48	70.00	38.36
2#	2.99	28.18	56.21
3#	0.68	1.82	5.43

填砂管编号	渗透率/ μm²	水驱油(调剖前) 相对吸水量,%	第一轮调剖后相对吸水量,%	第二轮调剖后相对吸水量,%	第三轮调剖后相对吸水量,%
1#	5.48	69.60	47.17	14.49	24.25
2#	1.936	19.80	37.74	39.13	47.95
3#	0.327	10.60	15.09	46.38	27.80

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Mechanism study on multi-round profile control technique in fractured water flooding reservoir

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