水力缝内爆燃压裂次生缝长影响因素分析
|
摘要
水力缝内爆燃压裂是一种将水力压裂和爆燃压裂相结合的储层改造技术。地层参数、药剂能量、次生裂缝条数等参数会对爆燃次生裂缝长度产生影响。应用弹性力学理论、断裂力学理论推导出了次生裂缝扩展过程中的耦合方程组,结合止裂判据,导出了次生裂缝止裂时的缝长方程。并通过正交试验得到各参数对次生裂缝长度的影响程度从大到小依次为:裂缝条数、气体摩尔数、岩石弹性模量、断裂韧性、最大水平地应力、气体温度、泊松比。通过单因素分析表明次生裂缝长度与次生裂缝条数、最大水平地应力、岩石断裂韧性呈反相关关系,与岩石弹性模量、泊松比、气体摩尔数、气体温度呈正相关关系。
Deflagration fracturing in hydraulic fractures is a reservoir construction technology which combines hydraulic fracturing with deflagration fracturing. The parameters of formation parameters, chemical energy, and secondary fracture numbers can impact the length of deflagration secondary fracture length. Based on the elastic mechanics theory and the fracture mechanics theory, coupled equations was deduced in the process of secondary fracture expansion. In addition, according to crack arrest criterion, the fracture length equation of secondary deflagration fracture was derived. The orthogonal test shows that the influence degree of different parameters on the length of the secondary deflagration fracture from big to small is fracture number, gas mole number, rock modulus of elasticity, fracture toughness, maximum horizontal stress, gas temperature, Poisson′s ratio, in addition, single factor analysis shows that secondary deflagration fracture length has inverse relation with secondary deflagration fracture number, maximum horizontal stress, fracture toughness of rock, and has positive relation with rock elastic modulus, Poisson′s ratio, gas mole number and gas temperature.
Deflagration fracturing in hydraulic fractures is a reservoir construction technology which combines hydraulic fracturing with deflagration fracturing. The parameters of formation parameters, chemical energy, and secondary fracture numbers can impact the length of deflagration secondary fracture length. Based on the elastic mechanics theory and the fracture mechanics theory, coupled equations was deduced in the process of secondary fracture expansion. In addition, according to crack arrest criterion, the fracture length equation of secondary deflagration fracture was derived. The orthogonal test shows that the influence degree of different parameters on the length of the secondary deflagration fracture from big to small is fracture number, gas mole number, rock modulus of elasticity, fracture toughness, maximum horizontal stress, gas temperature, Poisson′s ratio, in addition, single factor analysis shows that secondary deflagration fracture length has inverse relation with secondary deflagration fracture number, maximum horizontal stress, fracture toughness of rock, and has positive relation with rock elastic modulus, Poisson′s ratio, gas mole number and gas temperature.
引文
[1]邹才能,张光亚,陶士振,等.全球油气勘探领域地质特征、重大发现及非常规石油地质[J].石油勘探与开发,2010,37(2):129-145.
[2]梁兴,叶熙,张介辉,等.滇黔北坳陷威信凹陷页岩气成藏条件分析与有利区优选[J].石油勘探与开发,2011,38(6):693-699.
[3]邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.
[4]高树生,叶礼友,熊伟,等.大型低渗致密含水气藏渗流机理及开发对策[J].石油天然气学报,2013,35(7):93-99.
[5]马旭,郝瑞芬,来轩昂,等.苏里格气田致密砂岩气藏水平井体积压裂矿场试验[J].石油勘探与开发,2014,41(6):742-747.
[6]Nobakht M,Clarkson C R,Kaviani D.New and improved methods for performing rate-transient analysis of shale gas reservoirs[C]//paper SPE-147869-MS presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition,20-22 September2011,Jakarta,Indonesia.Jakarta,SPE:2011.
[7]丁雁生,陈力,谢燮,等.低渗透油气田“层内爆炸”增产技术研究[J].石油勘探与开发,2001,28(2):90-96.
[8]翁定为,张启汉,卢拥军,等.提高砂岩储层人工裂缝复杂度的压裂技术及其应用[J].天然气地球科学,2014,25(7):1085-1089.
[9]张晓春.井内爆炸岩石损伤及渗透率变化规律研究[D].山东东营:中国石油大学(华东),2011.
[10]吴晋军.低渗透油田强脉冲加载压裂技术[M].北京:石油工业出版社,2012.
[11]何丽萍,韩锋刚,李文宏,等.多级燃速爆燃气体压裂裂缝扩展耦合作用分析[J].石油钻探技术,2009,37(2):66-69.
[12]孙志宇,李宗田,苏建政,等.地层参数对爆燃气体压裂裂缝扩展形态影响分析[J].油气地质与采收率,2011,18(1):101-104.
[13]陈德春,吴晓东,李海波,等.油气层爆燃压裂裂缝动态延伸模型[J].中国石油大学学报(自然科学版),2011,35(4):103-107.
[14]吴飞鹏,蒲春生,陈德春,等.多级脉冲爆燃压裂作用过程耦合模拟[J].石油勘探与开发,2014,41(5):605-611.
[15]卢文波,陶振宇.爆生气体驱动的裂纹扩展速度研究[J].爆炸与冲击,1994,14(3):264-267.
[16]Michael J.Economides.油藏增产措施[M].北京:石油工业出版社,2002.
[17]Rethore J,Gravouil A,Combvescure A.A stable numerical scheme for the finite element simulation of dynamic crack propagation with remeshing[J].Computer Methods in Applied Mechanics and Engineering,2004,193(42):4493-4510.
[18]曾凡辉,郭建春,何颂根,等.致密砂岩气藏压裂水平井裂缝参数的优化[J].天然气工业,2012,32(11):54-58.
[19]汪荣鑫.数理统计[M].西安:西安交通大学出版社,2013.
[2]梁兴,叶熙,张介辉,等.滇黔北坳陷威信凹陷页岩气成藏条件分析与有利区优选[J].石油勘探与开发,2011,38(6):693-699.
[3]邹才能,董大忠,王社教,等.中国页岩气形成机理、地质特征及资源潜力[J].石油勘探与开发,2010,37(6):641-653.
[4]高树生,叶礼友,熊伟,等.大型低渗致密含水气藏渗流机理及开发对策[J].石油天然气学报,2013,35(7):93-99.
[5]马旭,郝瑞芬,来轩昂,等.苏里格气田致密砂岩气藏水平井体积压裂矿场试验[J].石油勘探与开发,2014,41(6):742-747.
[6]Nobakht M,Clarkson C R,Kaviani D.New and improved methods for performing rate-transient analysis of shale gas reservoirs[C]//paper SPE-147869-MS presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition,20-22 September2011,Jakarta,Indonesia.Jakarta,SPE:2011.
[7]丁雁生,陈力,谢燮,等.低渗透油气田“层内爆炸”增产技术研究[J].石油勘探与开发,2001,28(2):90-96.
[8]翁定为,张启汉,卢拥军,等.提高砂岩储层人工裂缝复杂度的压裂技术及其应用[J].天然气地球科学,2014,25(7):1085-1089.
[9]张晓春.井内爆炸岩石损伤及渗透率变化规律研究[D].山东东营:中国石油大学(华东),2011.
[10]吴晋军.低渗透油田强脉冲加载压裂技术[M].北京:石油工业出版社,2012.
[11]何丽萍,韩锋刚,李文宏,等.多级燃速爆燃气体压裂裂缝扩展耦合作用分析[J].石油钻探技术,2009,37(2):66-69.
[12]孙志宇,李宗田,苏建政,等.地层参数对爆燃气体压裂裂缝扩展形态影响分析[J].油气地质与采收率,2011,18(1):101-104.
[13]陈德春,吴晓东,李海波,等.油气层爆燃压裂裂缝动态延伸模型[J].中国石油大学学报(自然科学版),2011,35(4):103-107.
[14]吴飞鹏,蒲春生,陈德春,等.多级脉冲爆燃压裂作用过程耦合模拟[J].石油勘探与开发,2014,41(5):605-611.
[15]卢文波,陶振宇.爆生气体驱动的裂纹扩展速度研究[J].爆炸与冲击,1994,14(3):264-267.
[16]Michael J.Economides.油藏增产措施[M].北京:石油工业出版社,2002.
[17]Rethore J,Gravouil A,Combvescure A.A stable numerical scheme for the finite element simulation of dynamic crack propagation with remeshing[J].Computer Methods in Applied Mechanics and Engineering,2004,193(42):4493-4510.
[18]曾凡辉,郭建春,何颂根,等.致密砂岩气藏压裂水平井裂缝参数的优化[J].天然气工业,2012,32(11):54-58.
[19]汪荣鑫.数理统计[M].西安:西安交通大学出版社,2013.