Dynamic simulation of 3-D multiple-scale wormhole propagation in carbonate rocks

被引：0

作者：

Xue H. ^{[1
]}

Zhao L. ^{[1
]}

Liu P. ^{[1
]}

Cui M. ^{[2
]}

Jiang W. ^{[2
]}

Liang C. ^{[2
]}

Ye J. ^{[3
]}

Xu B. ^{[1
]}

机构：

[1] State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation Engineering, Southwest Petroleum University, Chengdu, 610500, Sichuan

[2] Langfang Branch of Research Institute of Petroleum Exploration & Development, Petro China, Langfang, 065007, Hebei

[3] Engineering Technology Research Institute of Southwest Oil & Gas Field Company, Petro China, Chengdu, 610017, Sichuan

来源：

| 1600年 / Editorial Department of Oil and Gas Geology卷 / 37期

关键词：

3D simulation; Acidizing wormhole; Carbonate rock; EOR; Numerical model; Porous medium;

D O I：

10.11743/ogg20160520

中图分类号：

学科分类号：

摘要：

Three dimensional (3-D) simulation of wormhole propagation is crucial for predicting stimulation effects of acidizing or acid fracturing in carbonate reservoirs.This paper presented a 3-D multiple-scale wormhole propagation model built based on the double-scale model,and its solving details.Meanwhile,geological modeling method was used to establish the geology model of porosity correlation distribution in 3-D space,which deals with the saltation of porosity successfully and makes the simulation results more realistic and reliable.Through the simulations,we found that the injection rate is the key factor affecting wormhole patterns.With the increase of the injection rate,five dissolving patterns may be observed,namely face dissolution,conical wormhole,dominant wormhole,ramified wormhole and uniform dissolution.When the convection and dispersion are comparable,the dominant wormhole may form with a thick root and a thin tip.The do-minant wormhole propagation can be divided into the following successive four stages,including competition stage,dominant stage,breaking stage and broadening stage.Most importantly,we found that the wormhole propagation pathway is highly correlated with the spatial correlation of porosity,since the wormhole breaks the core through those large pores with well connectivity.Finally,the field simulation results verified that the models and methods proposed in this paper are feasible and reliable for wormhole simulation of acidizing and acid fracturing in carbonate reservoirs.Those works could provide theoretical support for fine simulation and prediction in the relevant research areas. © 2016, Editorial Office of Oil and Gas Geology. All right reserved.

引用

页码：792 / 798

页数：6

共 20 条

[1] Fredd C.N., Miller M.J., Validation of carbonate matrix stimulation models, pp. 39-52, (2000)
[2] Huang T., Hill A.D., Schechter R.S., Reactionrate and fluid loss: The keys to wormhole initiation and propagation in carbonate acidizing, Spe Journal, 5, 3, pp. 287-292, (2000)
[3] Mcduff D., Jackson S., Shuchart C.E., Et al., Understanding wormholes in carbonates: Unprecedented experimental scale and 3D visualization, Journal of Petroleum Technology, 62, 10, pp. 78-81, (2010)
[4] Buijse M.A., Understanding wormholing mechanisms can improve acid treatments in carbonate formations, Spe Production & Facilities, 15, 3, pp. 168-175, (2000)
[5] Gdanski R., A fundamentally new model of acid wormholing in carbonates, Spe European Formation Damage Conference, (1999)
[6] Fredd C.N., Fogler H.S., Influence of transport and reaction on wormhole formation in porous media, Aiche Journal, 44, 9, pp. 1933-1949, (1998)
[7] Hoefner M.L., Fogler H.S., Pore evolution and channel formation during flow and reaction in porous media, Aiche Journal, 34, 1, pp. 45-54, (1988)
[8] Panga M.K.R., Ziauddin M., Balakotaiah V., Two-scale continuum model for simulation of wormholes in carbonate acidization, Aiche Journal, 51, 51, pp. 3231-3248, (2005)
[9] Kalia N., Balakotaiah V., Modeling and analysis of wormhole formation in reactive dissolution of carbonate rocks, Chemical Engineering Science, 62, 4, pp. 919-928, (2007)
[10] Liu P., Xue H., Zhao L.Q., Et al., Analysis and simulation of rheological behavior and diverting mechanism of In Situ Self-Diverting acid, Journal of Petroleum Science & Engineering, 132, pp. 39-52, (2015)

← 1 2 →