Key Factors for Inhibiting Fracture Propagation during Leakage Control under Pressure
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摘要: 对于裂缝性地层中发生的井漏问题,通常采用堵漏材料承压封堵阻止裂缝扩大,但到目前为止对裂缝止裂条件的影响因素缺乏深入分析,为此,通过分析承压封堵后缝内的压力变化,应用叠加原理推导了缝内压力引起的缝尖应力强度因子分量公式,并在此基础上分析了其随不同影响因素的变化规律。分析表明,随着封堵长度增长、钻井液黏度增大或封堵渗透率降低,应力强度因子分量减小,裂缝逐渐满足止裂条件;裂缝长度越长或井内压力越高,应力强度因子分量越大,裂缝越不容易止裂;封堵位置越靠近缝尖处,应力强度因子分量越大,越不利于裂缝止裂。缝内压力引起的缝尖应力强度因子分量与封堵长度、封堵位置均近似满足三次函数关系,与钻井液黏度、井内压力均满足线性函数关系,与封堵渗透率近似满足对数函数关系,与裂缝长度满足幂函数关系。研究认为,承压堵漏过程中,在裂缝长度和井内压力不变或无法控制时,通过优化调整堵漏液配方和钻井液性能可实现裂缝止裂。Abstract: In order to minimize lost circulation time while drilling through fractured formations, lost circulation plugging materials are generally used to prevent fracture propagation under pressure. So far, however, no further analysis has been performed on the key factors that arrest or inhibit fracturing. In this paper, a related study was conducted. First, analysis was conducted on fracture pressure variation after leakage control. Second, a formula for the fracture terminations and a stress intensity factor induced by fracture pressure was derived using the principle of superposition. And third, the influencing factors of the stress intensity factor were analyzed. It is shown that the stress intensity factor decreases with the increase of plugging length, drilling fluid viscosity, and the decrease of the plugging permeability, and consequently arrest/inhibition of propagation conditions are gradually satisfied. The stress intensity factor increases as fracture length or subsurface pressure increases or plugging location gradually approaching fracture terminations. The higher the stress intensity factor is, the more difficult the fracture inhibition. The functional relationships between the stress intensity factor induced by fracture pressure and other parameters are as follows. The formula shows approximately a cubic relationship with plugging length and location, linear relationship with drilling fluid viscosity and subsurface pressure, approximately a logarithmic relationship with plugging permeability, and power relationship with fracture length. In summary, fracture propagation can be stopped through optimizing circulation lost materials and improving drilling fluid properties if the fracture length and subsurface pressure are constant or out of control during pressured leakage control.
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[1] 徐同台,刘玉杰,申威,等.钻井工程防漏堵漏技术[M].北京:石油工业出版社,1997:1-34. XU Tongtai,LIU Yujie,SHEN Wei,et al.The plugging technology in drilling engineering[M].Beijing:Petroleum Industry Press,1997:1-34. [2] 王业众,康毅力,游利军,等.裂缝性储层漏失机理及控制技术进展[J].钻井液与完井液,2007,24(4):74-77. WANG Yezhong,KANG Yili,YOU Lijun,et al.Progresses in mechanism study and control:mud losses to fractured reservoirs[J].Drilling Fluid Completion Fluid,2007,24(4):74-77. [3] MORITA N,BLACK A D,FUH G F.Theory of lost circulation pressure[R].SPE 20409,1990.
[4] FUH Giin-Fa,MORITA N,BOYD P A,et al.A new approach to preventing lost circulation while drilling[R].SPE 24599,1992.
[5] ALBERTY M W,MCLEAN M R.A physical model for stress cages[R].SPE 90943,2004.
[6] DUPRIEST F E.Fracture closure stress (FCS) and lost returns practices[R].SPE/IADC 92192,2005.
[7] WANG H,TOWLER B F,SOLIMAN M Y.Fractured wellbore stress analysis:sealing cracks to strengthen a wellbore[R].SPE/IADC 104947,2007.
[8] WANG H,SOLIMAN M Y,TOWLER B F.Investigation of factors for strengthening a wellbore by propping fractures[R].SPE 112629,2008.
[9] AADNOY B S,ANGEL M,JERQUERA A,et al.Design of well barriers to combat circulation losses[R].SPE 105449,2007.
[10] 王贵,蒲晓林,文志明,等.基于断裂力学的诱导裂缝性井漏控制机理分析[J].西南石油大学学报:自然科学版,2011,33(1):131-134. WANG Gui,PU Xiaolin,WEN Zhiming,et al.Mechanism of controlling lost circulation in induced fracture formation based on fracture mechanics[J].Journal of Southwest Petroleum University:Science Technology Edition,2011,33(1):131-134. [11] 王贵,蒲晓林.提高地层承压能力的钻井液堵漏作用机理[J].石油学报,2010,31(6):1009-1012. WANG Gui,PU Xiaolin.Plugging mechanism of drilling fluid by enhancing wellbore pressure[J].Acta Petrolei Sinica,2010,31(6):1009-1012. [12] 杨沛,陈勉,金衍,等.裂缝承压能力模型及其在裂缝地层堵漏中的应用[J].岩石力学与工程学报,2012,31(3):479-487. YANG Pei,CHEN Mian,JIN Yan,et al.Crack pressure bearing capacity model and its application to plugging of fractured formation[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(3):479-487. [13] 贾利春,陈勉,张伟,等.诱导裂缝性井漏止裂封堵机理分析[J].钻井液与完井液,2013,30(5):82-85. JIA Lichun,CHEN Mian,ZHANG Wei,et al.Plugging mechanism of induced fracture for controlling lost circulation[J].Drilling Fluid Completion Fluid,2013,30(5):82-85. [14] 吕开河.钻井工程中井漏预防与堵漏技术研究与应用[D].青岛:中国石油大学(华东)石油工程学院,2007. LYU Kaihe.Study and application of lost circulation resistance and control technology during drilling[D].Qingdao:China University of Petroleum(Huadong),School of Petroleum Engineering,2007. [15] 薛玉志,刘振东,唐代绪,等.裂缝性地层堵漏配方及规律性研究[J].钻井液与完井液,2009,26(6):28-30. XUE Yuzhi,LIU Zhendong,TANG Daixu,et al.Study on the formulation of lost circulation control fluid and the laws of lost circulation control for fractured formations[J].Drilling Fluid Completion Fluid,2009,26(6):28-30. [16] 程仲,熊继有,程昆,等.物理法随钻堵漏技术的试验研究[J].石油钻探技术,2009,37(1):53-57. CHENG Zhong,XIONG Jiyou,CHENG Kun,et al.Experimental studies on sealing while drilling using physical materials[J].Petroleum Drilling Techniques,2009,37(1):53-57. [17] SAVARI S,KUMAR A,WHITFILL D L,et al.Engineered LCM design yileds novel activating materials for potential application in severe lost circulation scenarios[R].SPE 164748,2013.
[18] KEFI S,LEE J C,SHINDGIKAR N D,et al.Optimizing in four steps composite lost circulation pills without knowing loss zone width[R].IADC/SPE 133735,2010.
[19] LEOPPKE G E,GLOWKA D A,WRIGHT E K.Design and evaluation of lost-circulation materials for severe environments[J].JPT,1990,42(3):328-337.
[20] 李家学,黄进军,罗平亚,等.裂缝地层随钻刚性颗粒封堵机理与估算模型[J].石油学报,2011,32(3):509-513. LI Jiaxue,HUANG Jinjun,LUO Pingya,et al.Plugging mechanism and estimation models of rigid particles while drilling in fracture formations[J].Acta Petrolei Sinica,2011,32(3):509-513. [21] KAAGESON-LOE N,SANDERS M W,GROWCOCK F,et al.Particulate-based loss-prevention material:the secrets of fracture sealing revealed[R].IADC/SPE 112595,2008.
[22] FREQUIN D,BEDRIKOVETSKY P,ZITHA P L J.CT scan study of the leak-off of oil-based drilling fluids into saturated media[R].SPE 165193,2013.
[23] 阿特金森B K.岩石断裂力学[M].尹祥础,修济刚,译.北京:地震出版社,1992:76-119. ATKINSON B K.Frature mechanics of rock[M].YIN Xiangchu,XIU Jigang,translated.Beijing:Earthquake Press,1992:76-119. [24] CHEKHONIN E,LEVONYAN K.Hydraulic fracture propagation in highly permeable formations,with applications to tip screenout[J].International Journal of Rock Mechanics and Mining Sciences,2012,50:19-28.
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