Hydraulic fracturing initiation pressure models for directional wells in naturally fractured formation

doi:10.7623/syxb200605026

Editorial office of ACTA PETROLEI SINICA ›› 2006, Vol. 27 ›› Issue (5): 124-126.DOI: 10.7623/syxb200605026

• Petroleum Engineering • Previous Articles Next Articles

Hydraulic fracturing initiation pressure models for directional wells in naturally fractured formation

Jin Yan, Chen Mian, Zhang Xudong

Faculty of Petroleum Engineering, China University of Petroleum, Beijing 102249, China

Received:2005-10-15 Revised:2005-12-01 Online:2006-09-25 Published:2010-05-21

天然裂缝地层斜井水力裂缝起裂压力模型研究

金衍, 陈勉, 张旭东

中国石油大学石油天然气工程学院, 北京, 102249

作者简介:金衍,男,1972年8月生,2001年获石油大学(北京)博士学位,现为中国石油大学(北京)石油天然气工程学院副教授,主要从事油气井岩石力学与工程的研究.E-mail:jiny@cup.edu.cn
基金资助:
国家自然科学基金(No.50304010)、(No.90510005);中国石油创新基金(05E7015)联合资助

Abstract

Abstract: There are three possible initiation modes for hydraulic fracturing on the wellbore influenced by trend and dip of natural factures,including tensional fracture along natural fractures,shear fracture along natural fractures and tensional fracture initiating from rock body.On the basis of the occurrence and geometric distribution of natural fractures and the stress status of naturally fractured formations in directional wells,some models for calculation of hydraulic fracturing initiation pressure were established.The identification method for determining hydraulic fracturing initiation mode and initiation pressure was obtained.A field case verified that these models could be successfully used to predict the fracture pressure of naturally fractured formations.

Key words: directional well, naturally fractured formation, hydraulic fracturing, initiation mode, initiation pressure, calculation model

摘要： 受天然裂缝和倾角的影响,水力裂缝在斜井井壁处可能存在3种起裂方式,分别为沿天然裂缝面张性起裂、沿天然裂缝面剪切破裂和从岩石本体起裂.根据地层地应力状态及天然裂缝的产状,建立了裂缝性地层斜井水力裂缝3种起裂方式的起裂压力计算模型,提出了水力裂缝起裂方式和起裂压力的判别方法.现场实例表明:该模型能成功地解释天然裂缝性地层的破裂压力.

关键词: 斜井, 天然裂缝地层, 水力压裂, 起裂方式, 起裂压力, 计算模型

CLC Number:

TE357

Jin Yan, Chen Mian, Zhang Xudong. Hydraulic fracturing initiation pressure models for directional wells in naturally fractured formation[J]. Editorial office of ACTA PETROLEI SINICA, 2006, 27(5): 124-126.

金衍, 陈勉, 张旭东. 天然裂缝地层斜井水力裂缝起裂压力模型研究[J]. 石油学报, 2006, 27(5): 124-126.

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Hydraulic fracturing initiation pressure models for directional wells in naturally fractured formation

天然裂缝地层斜井水力裂缝起裂压力模型研究

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