第39参第6期 2017年11月
石油钻采工艺
OIL DRILLING & PRODUCTION TECHNOLOGY
文章编号：10007393(2017)06075105
DOI:10.13639/j.odpt.2017.06.016
Vol. 39 No. 6 Nov.2017
非稳态渗流下砂砾岩水力裂缝扩展数值模拟
张红静徐康泰刘立冬’吴德’高秀君？孙春亮”李立*
1.承德石油高等专科学投；2.中国石油激海钻探工程有限公司；3.中国石油华北油田分公司；4.濮阳佰斯泰油气技术有限公司
引用格式：张红静，徐康泰，刘立冬，吴德，高秀君，孙春亮，主丽霞，李立，非稳态渗流下砂砾券水力裂缝扩展数值模拟[」] 石油钻朵工艺，2017,39(6)：751-755.
摘要：由于殊石的存在，砂殊岩储层水力压裂裂缝扩展机理不明确，裂缝形态难以控制。将砂砾岩储层中殊石表征为基质一交累面一砾石的复合结构，结合断裂力学与损伤力学的方法，建立了应力场与非稳定渗流场共同作用下砂烁岩储层水力裂缝扩展的数学模型并进行了求解，分析了主应力差、册石较径、研石含量、排量等因素对聚缝扩展形态和岩体破累压力的影响研究结果表明：砂砾岩储层水力裂缝形态复杂，次生射状裂缝发育；水力裂缝遇砾发生绕砾、穿殊砾与止裂现象，并以绕砾扩展为主；在研究范围内，水力裂缝长度随主应力差、砾石粒径、排量的增大而增大，随砾石含量的增大而减小；水力压裂过程中岩体的破压力与主应力差、砾石含量、排量成正比，与殊石粒径成反比。
关键词：砂砾岩储层；水力裂缝扩展；非稳态渗流；数值模拟
中文分类号：TE357.1
文献标识码：A
Numerical simulation on hydraulic fracturepropagation inglutenite
under theeffect ofunsteady seepage
ZHANGHongjingU Kangtai,IU Lidong,WUDe,GAO Xujun,SUN ChunliangIL
1. Chengde Petroleam College, Chengde 067000, Hebei, China; 2. CPC Bohai Drilling Engineering Compary Limited, Renqiar 062552, Hebei, China; 3. PeroChina Huabei Oifield Company, Renqir 062552, Hebei, China; 4. Baistai Oil and Gas Techndogy Co., Lid., Prgang 457000, He'nan, Chind
Citation: ZHANG Hongjing, XU Kangtai, LIU Lidong, WU De, GAO Xiujun, SUN Chunliang, LI Li. Numerical simulation on hydraulic fracture propagation in glutenite under the effect of unsteady seepage [ J] - Oil Drilling & Production Technology, 2017, 39(6): 751-755.
Abstract: Due to the existence of gravels, the propagation mechanisms of hydraulic fractures in glutenite reservoirs are not defined and fracture morphology can be hardly controlled. In this paper, the gravel in glutenite reservoirs was characterized as a three-phase com-plex structure of matrix-interface-gravel. Then, the mathematical model for the propagation of hydraulic fractures in glutenite reservoirs under the joint effect of stress field and unsteady seepage field was established by means of fracturing mechanics and damage mechanics comprehensively, and it was solved. Finally, the effects of principal stress difference, gravel particle diameter, gravel content and flow rate on fracture propagation morphology and rock fracturing pressure were analyzed. The following research results were obtained. First, the hydraulic fractures in glutenite reservoirs are morphologically complex with developed secondary pinnate fractures. When hydraulic fractures meet gravels, gravel bypassing, gravel penetrating and crack arresting occur, and gravel bypassing propagation is dominant. Second, the length of hydraulic fractures in the study area increases with the increase of principal stress difference, gravel particle di-ameter and flow rate and with the decrease of gravel content. Third, the rock fracturing pressure in the process of hydraulic fracturing is proportional to principal stress difference, gravel content and flow rate and is in inverse proportion to gravel particle diameter.
Key words: glutenite reservoir, propagation of hydraulice fracture; unsteady seepage; numerical simulation 基金项目：河北省重点研发计划自筹项目“海上低渗遗沟气资源压裂开采关键技术研究"（编号：17273204)。
第一作者：张红静(1976-),2006年毕业于西南石油大季油气田开发专业，博士，制教投。通试地址：(067000)河北省承德市大学图区，
E-mail; zhjpanjin916122@126.com
通讯作者：徐康泰(1990-),2016年毕业于中图石油大学(北京)油气田开发工程专业。通试地址：(067000)河北省承德市大学图区。E-mail：
xukangtai123@126.com
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