自然伽马曲线在薄隔层压裂井中的应用
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摘要
为了尽可能提高Y油田薄隔层井压裂改造程度,通过岩石力学理论计算得到储层最小水平地应力剖面,分析了储层最小主应力与自然伽马值的关系,即最小水平应力分布与自然伽马值分布近似成正比关系。以此为依据,开展现场试验,明确了储隔层自然伽马差值越大,薄隔层能够实现遮挡的界限值就越低。给出了储隔层自然伽马差值与薄隔层井压裂界限的关系,大大提高了薄隔层井压裂成功几率。利用研究方法可有效指导薄隔层井压裂施工,以提高储层动用程度,获得更高的开采效益。
In order to improve the fracturing effect of the thin interlayer wells in Y oil field, the minimum horizontal formation stress profile of reservoir is obtained by rock mechanics theory, and the relationship between the minimum horizontal principal stress and natural gamma value is analyzed. The result shows that the minimum horizontal principal stress distribution is approximately propor-tional to the natural gamma distribution. Based on this, field experiments were carried out, and it is determined the greater the differ-ence of natural gamma between the reservoir and the interlayer, the lower the interlayer thickness boundary value with shielding ef-fect. The relationship between the difference of natural gamma between the reservoir and the interlayer and the fracturing limit of the thin interlayer well is presented, which greatly improves the fracturing success probability of the thin interlayerl wells. The research method can effectively guide the fracturing construction of thin interlayer wells, in order to improve the utilization degree of reservoirs and obtain higher mining benefits.
In order to improve the fracturing effect of the thin interlayer wells in Y oil field, the minimum horizontal formation stress profile of reservoir is obtained by rock mechanics theory, and the relationship between the minimum horizontal principal stress and natural gamma value is analyzed. The result shows that the minimum horizontal principal stress distribution is approximately propor-tional to the natural gamma distribution. Based on this, field experiments were carried out, and it is determined the greater the differ-ence of natural gamma between the reservoir and the interlayer, the lower the interlayer thickness boundary value with shielding ef-fect. The relationship between the difference of natural gamma between the reservoir and the interlayer and the fracturing limit of the thin interlayer well is presented, which greatly improves the fracturing success probability of the thin interlayerl wells. The research method can effectively guide the fracturing construction of thin interlayer wells, in order to improve the utilization degree of reservoirs and obtain higher mining benefits.
引文
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[10]刘钦节,闫相祯,杨秀娟.分层地应力方法在薄互层低渗油藏大型压裂设计中的应用[J].石油钻采工艺,2009,31(4):83-88.
[11]杨红,许亮,何衡,等.利用测井、压裂资料求取储层地应力的方法[J].断块油气田,2014,21(4):467-473.
[12]周拿云,杨兆中.地层破裂压力预测技术综述[J].重庆科技学院学报(自然科学版),2011,13(1):36-39.
[2]闫怀荣,蒲三龙,魏江伟,等.姬塬油田高强度压裂改造工艺技术研究[J].石油工业技术监督,2017,33(5):24-26.
[3]高翔,蒋建方,饶庆峰,等.榆树林油田树2井区整体压裂裂缝参数优化[J].石油地质与工程,2016,30(6):118-120.
[4]姚洪田,周洪亮,窦淑萍,等.低渗透油藏注水井有效压裂技术探索[J].特种油气藏,2014,21(1):127-130.
[5]张耀升,胡望水,王建一,等.扶余油田储层裂缝特征及其与注水开发的关系[J].石油地质与工程,2016,30(1):99-102.
[6]杨昕谅,周洪亮,肖立国,等.转向压裂井裂缝转向的影响因素分析[J].科学技术与工程,2014,14(32):467-474.
[7]张美玲,董传雷,蔺建华.地应力分层技术在压裂设计优化中的应用[J].地质力学学报,2017,23(3):198-202.
[8]张玉广,周洪亮,尹洪军,等.各向异性油藏水平井线性井网渗流场分析[J].科学技术与工程,2010,10(11):41-45.
[9]王晓杰,彭仕宓,吕本勋,等.用正交偶极阵列声波测井研究地层地应力场[J].中国石油大学学报(自然科学版),2008,32(4):42-46.
[10]刘钦节,闫相祯,杨秀娟.分层地应力方法在薄互层低渗油藏大型压裂设计中的应用[J].石油钻采工艺,2009,31(4):83-88.
[11]杨红,许亮,何衡,等.利用测井、压裂资料求取储层地应力的方法[J].断块油气田,2014,21(4):467-473.
[12]周拿云,杨兆中.地层破裂压力预测技术综述[J].重庆科技学院学报(自然科学版),2011,13(1):36-39.