Study on the Construction and Performance of Completion Fluid System in Fractured Carbonate Reservoir

Article Preview

Abstract:

There are microfractures and fractures in the carbonate formation of M oilfield, which are easy to cause collapse and borehole instability. On the basis of the liquefiable cleanflo drilling fluid system for open hole completion of horizontal wells designed in the early stage, this paper has carried out the research work of matching acidizing completion fluid system. In this paper, the influence factors, cleaning ability, compatibility, acidizing situation and protection effect of acidizing completion fluid system are evaluated in laboratory. The way of density adjustment and specific dosage of NaCl and hcoona were established to inhibit the formation of salt crystallization. HTA solid acid and JCI are used to counteract each other to reduce the corrosion of casing steel. The core displacement results show that the permeability recovery value of carbonate core after completion fluid treatment can reach 97.54%, and that of sandstone core after treatment can reach 114.7%. Moreover, the completion fluid system also has a certain acidizing effect, which can not only clean and remove the plugging, but also serve as the early induction of acidizing and stimulation.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

388-394

Citation:

Online since:

September 2020

Export:

Price:

* - Corresponding Author

[1] Luo P Y, Kang Y L, Meng Y F, Leap forward development of reservoir protection technology in China, Natural Gas Industry. 26 (2006) 84-87.

Google Scholar

[2] Gu J,Zhang G Y, Gao Y T, Fracture reservoir protection technology and drilling and completion fluid, Oilfield Chemistry. 24(2007) 87-92.

Google Scholar

[3] Li L, Li Y M, Yang Y P, et al, Application of Nanomaterials in Reservoir Protection, Applied Mechanics & Materials. 208(2012) 699-702.

DOI: 10.4028/www.scientific.net/amm.204-208.699

Google Scholar

[4] Liu W,Study on reservoir protection and reconstruction measures of low permeability reservoir, Chengdu University of Technology. (2008).

Google Scholar

[5] Jiang G, Bao M, Chao J I, et al, Study and Application on the Oil-Film Method Used for Reservoir Protection Drilling and Completion Fluid Systems, Journal of Dispersion Science & Technology. 31(2010) 1273-1277.

DOI: 10.1080/01932690903224599

Google Scholar

[6] Wu X M, Zhang F, Zhao S S, Research on drilling fluid for coalbed methane and shale gas reservoir protection, National prospecting project. (2015).

Google Scholar

[7] Yue Q S, Chen J, Ju L F, et al, Research on coalbed methane drilling fluid for horizontal well based on coal reservoir protection in Qinshui Basin, Journal of China Coal Society. 37(2012) 416-419.

Google Scholar

[8] Arlati S, Rolo J, Micallef E, et al, A Reservoir Nasal Cannula Improves Protection Given by Oxygen during Muscular Exercise in COPD, Chest. 93(1988) 1165.

DOI: 10.1378/chest.93.6.1165

Google Scholar