大规模缝内转向压裂技术研究与试验
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摘要
海拉尔盆地断块多、储层低渗透、物性条件复杂,由于非均质性强导致井网条件下常规压裂单一裂缝效果差。以完善注采关系和形成有效驱动体系为目标,基于对复杂岩性储层应力场变化规律的认识,研究了缝内转向形成多裂缝机理。通过优化转向裂缝条数与尺寸,应用缝内暂堵工艺方法,形成了大规模缝内转向压裂技术。该技术主要特点是能够扩大裂缝与油藏的接触面积,增大井筒与地层的连通能力,增强压裂效果。现场试验井压后平均单井增油6.6 t/d,同时水井降压增注效果明显,形成了完善的注采关系。
Hailer Basin is characterized by many faulted blocks,low-permeability reservoirs,and complex physical properties,and moreover due to the strong heterogeneity,for the conventional fracturing under the conditions of current well patterns,the fractured results of the individual crack are rather poorer. In order to improve the injection-production relationship and establish the effective flooding system,based on the understandings of the changing laws on the stress field of the complex-lithology reservoirs,the multiple-crack fracturing mechanism reverted from the inside seams is figured out. By means of optimizing the inverted fracture number and size,and with the help of the inside-seam instantaneous plugging technology and method,large-scale inside-seam steering fracturing technique is developed. The principal advantages and characteristics are enlarging the area between the fractures and oil reservoirs,increasing the connectivity between the boreholes and formations,and moreover enhancing the effects of the fracturing. After the fracturing of the field testing wells,the average stimulated oil per well is up to 6. 6 t/d,at the same time,the effects of the pressure reduction and injection enhancement are pretty obvious for the water injectors,thus the improved injection-production relationship is established.
Hailer Basin is characterized by many faulted blocks,low-permeability reservoirs,and complex physical properties,and moreover due to the strong heterogeneity,for the conventional fracturing under the conditions of current well patterns,the fractured results of the individual crack are rather poorer. In order to improve the injection-production relationship and establish the effective flooding system,based on the understandings of the changing laws on the stress field of the complex-lithology reservoirs,the multiple-crack fracturing mechanism reverted from the inside seams is figured out. By means of optimizing the inverted fracture number and size,and with the help of the inside-seam instantaneous plugging technology and method,large-scale inside-seam steering fracturing technique is developed. The principal advantages and characteristics are enlarging the area between the fractures and oil reservoirs,increasing the connectivity between the boreholes and formations,and moreover enhancing the effects of the fracturing. After the fracturing of the field testing wells,the average stimulated oil per well is up to 6. 6 t/d,at the same time,the effects of the pressure reduction and injection enhancement are pretty obvious for the water injectors,thus the improved injection-production relationship is established.
引文
[1]谢朝阳,张浩,唐鹏飞.海拉尔盆地复杂岩性储层压裂增产技术[J].大庆石油地质与开发,2006,25(5):57-60.
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[3]王贤君,尚立涛,张明慧,等.可降解纤维压裂技术研究与现场试验[J].大庆石油地质与开发,2012,31(2)141-144.
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[12]杜宗和,李佳琦,聂洪力.缝内二次转向压裂技术探索[J].新疆石油地质,2013,34(3):349-353.
[13]唐梅荣,赵振峰,李宪文,等.多缝压裂新技术研究与试验[J].石油钻采工艺,2010,32(2):71-74.
[14]王忍峰,付振银,任雁鹏,等.多裂缝压裂工艺在超低渗储层中的应用[J].钻采工艺,2010,33:41-44.
[15]何育荣,何骁,向斌,等.多裂缝压裂工艺研究及现场实践[J].石油钻采工艺,2011,33(4):88-90.
[16]夏富国,郭建春,袁浩仁,等.基于支撑剂数的压裂优化设计方法研究[J].国外油田工程,2010,26(10):20-22.
[17]冯立,张学婧.海拉尔盆地三维地应力场数值模拟[J].大庆石油地质与开发,2011,30(2):115-119.
[18]苗洪波,唐振兴,邱玉超,等.海拉尔盆地贝中次凹南屯组一段储层特征分析及评价[J].大庆石油地质与开发,2011,30(2):50-55.
[19]常桂华.海拉尔盆地呼南地区南屯组沉积特征[J].大庆石油地质与开发,2013,32(3):52-56.
[20]吕明胜,陈开远,薛良清,等.三维地震构造应力场模拟及裂缝储层预测[J].大庆石油地质与开发,2011,30(2):31-35.
[2]肖丹凤,张宗雨,韩松,等.海拉尔深部南屯组高含泥储层压裂增产技术[J].大庆石油地质与开发,2012,31(1):101-105.
[3]王贤君,尚立涛,张明慧,等.可降解纤维压裂技术研究与现场试验[J].大庆石油地质与开发,2012,31(2)141-144.
[4]翁定为,雷群,胥云,等.缝网压裂技术及其现场应用[J].石油学报,2011,32(2):281-284.
[5]Potapenko D I,Tinham S K,Lecerf B,et al.Barnett shale refracture stimulations using a novel diversion technique[R].SPE119636,2009.
[6]才博,丁云宏,卢拥军,等.提高改造体积的新裂缝转向压裂技术及其应用[J].油气地质与采收率,2012,19(5):108-110.
[7]King G E,Haile L,Shuss J,et al.Increasing fracture path complexity and controlling downward fracture growth in the Barnett Shale[R].SPE 119896,2008.
[8]柳春林,王锐.多次加砂压裂裂缝延伸模型研究与应用[J].特种油气藏,2011,18(2):76-78.
[9]刘洪,罗天雨,王嘉淮,等.水力压裂多裂缝起裂模拟实验与分析[J].钻采工艺,2009,32(6):38-40.
[10]盖玉磊,薛仁江.深层低渗透油藏纤维加砂压裂工艺技术[J].特种油气藏,2011,18(1):121-125.
[11]Sitdikov S,Serdyuk A,Nikitin A,et al.Fiber-laden fluid-applied solution for addressing multiple challenges of hydraulic fracturing in Western Siberia[R].SPE 119825,2009.
[12]杜宗和,李佳琦,聂洪力.缝内二次转向压裂技术探索[J].新疆石油地质,2013,34(3):349-353.
[13]唐梅荣,赵振峰,李宪文,等.多缝压裂新技术研究与试验[J].石油钻采工艺,2010,32(2):71-74.
[14]王忍峰,付振银,任雁鹏,等.多裂缝压裂工艺在超低渗储层中的应用[J].钻采工艺,2010,33:41-44.
[15]何育荣,何骁,向斌,等.多裂缝压裂工艺研究及现场实践[J].石油钻采工艺,2011,33(4):88-90.
[16]夏富国,郭建春,袁浩仁,等.基于支撑剂数的压裂优化设计方法研究[J].国外油田工程,2010,26(10):20-22.
[17]冯立,张学婧.海拉尔盆地三维地应力场数值模拟[J].大庆石油地质与开发,2011,30(2):115-119.
[18]苗洪波,唐振兴,邱玉超,等.海拉尔盆地贝中次凹南屯组一段储层特征分析及评价[J].大庆石油地质与开发,2011,30(2):50-55.
[19]常桂华.海拉尔盆地呼南地区南屯组沉积特征[J].大庆石油地质与开发,2013,32(3):52-56.
[20]吕明胜,陈开远,薛良清,等.三维地震构造应力场模拟及裂缝储层预测[J].大庆石油地质与开发,2011,30(2):31-35.