STUDY ON ACID LEAK-OFF IN NATURALLY-FRAC-TURED RESERVOIRS

doi:10.3863/j.issn.1000-2634.2004.02.014

西南石油大学学报(自然科学版) ›› 2004, Vol. 26 ›› Issue (2): 50-53.DOI: 10.3863/j.issn.1000-2634.2004.02.014

• 油气化学工程与化工 • Previous Articles Next Articles

STUDY ON ACID LEAK-OFF IN NATURALLY-FRAC-TURED RESERVOIRS

LI Yong-ming¹ Guo Jian-chun¹ ZHAO Jing-zhou ¹ et al.

(Southwest Petroleum Institute, Chengdu Sichuan 610500, China)

Received:2003-05-22 Revised:1900-01-01 Online:2004-04-20 Published:2004-04-20
Contact: LI Yong-ming

Abstract

Abstract: When acid fluids flow in artificial fractures, some larger pores or natural fractures are dissolved by acid to enlarge into wormholes so that acid mainly leaks through wormholes. Therefore, it must be considered the effects of acidizingwormholes on acid leak-off in naturally-fractured reservoirs. Based on the characteristics of acid flowing in naturally-fractured reservoirs, the model of acidizingwormhole growth, the model of acid flowing and reaction inwormholes and the model of acid flowing in the matrix are developed. The computing
method of acid leak-offwith the effects of acidizingwormholes is put forward. The effects of net fracture pressure, wormhole population and acid viscosity to wormhole growth and acid leak-off are studied by case calculation that has important meanings for controlling the leak-off of acid fracturing

Key words: natural fracture, naturally-fractured reservoirs, acid fracturing, wormhole, leak-off, mathematical model

CLC Number:

LI Yong-ming Guo Jian-chun ZHAO Jing-zhou et al.. STUDY ON ACID LEAK-OFF IN NATURALLY-FRAC-TURED RESERVOIRS[J]. 西南石油大学学报(自然科学版), 2004, 26(2): 50-53.

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STUDY ON ACID LEAK-OFF IN NATURALLY-FRAC-TURED RESERVOIRS

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