大液量大排量低砂比滑溜水分段压裂工艺应用实践  

Application practice of the slick-water staged fracturing of massive fluid, high displacement and low sand concentration

作　　者：李平[1] 樊平天[1] 郝世彦 郑忠文[3] 余维初[4] LI Ping;FAN Pingtian;HAO Shiyan;ZHENG Zhongwen;YU Weichu(Nanniwan Oil Production Plant,Yanchang Oilfield Company Limited,Yan’an 716000,Shaanxi,China;Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Yan’an 716000,Shaanxi,China;Yanchang Oilfield Co.,Ltd,Yan’an 716000,Shaanxi,China;Yangtze University,Jinzhou 434000,Hubei,China)

机构地区：[1]延长油田股份有限公司南泥湾采油厂 [2]陕西延长石油(集团)有限责任公司研究院 [3]延长油田股份有限公司 [4]长江大学

出　　处：《石油钻采工艺》2019年第4期534-540,共7页Oil Drilling & Production Technology

摘　　要：随着油田开发的不断深入,南泥湾油田新建产能主要以常规井扩边开发为主,开发效果不理想,平均单井日产油0.4 t。为了提高储量的有效动用程度,开展了水平井压裂开发研究。针对长6储层地质特征,采用减小段间距(60~80 m减小到20 m)、增加簇数(2~3簇增加到5簇)等措施对水平段进行均匀有效的压裂,以增加排量与液量的方式使储层改造体积增大,并开展了现场优化试验。N199平2井现场施工及地面、井下裂缝监测表明,采用大液量大排量低砂比滑溜水分段压裂,利用主体段塞及变粒径加砂方式,入地液量为7 957.9 m^3,是其他压裂方式的2.5~3.5倍,油井稳定日产油达到了9.5 t/d,是其他压裂方式的2倍多。现场应用结果表明,优化后的水平井压裂参数合理,大液量大排量低砂比滑溜水分段压裂工艺具有良好的推广应用前景。With the deepening of oilfield development, the new production capacity of Nanniwan oilfield is mainly developed by expanding the conventional wells, the development effect is not ideal, and the average daily oil production of single well is 0.4 t. In order to improve the effective production degree of reserves, horizontal well fracturing development research was carried out.According to the geological characteristics of Chang 6 reservoir, measures such as reducing interval(60-80 m to 20 m) and increasing the number of perforating clusters(2-3 clusters to 5 clusters) were taken to evenly and effectively fracture the horizontal section, so as to increase the volume of reservoir reconstruction by increasing displacement and fluid volume, and field optimization tests were carried out. According to the field construction of well N199 Ping 2 and the monitoring of fractures on the ground and in the well, it is found that the amount of liquid entering the ground is 7 957.9 m^3, 2.5-3.5 times of other fracturing methods, and the daily production of oil well is 9.5 t/d, more than 2 times of other fracturing methods. The field application results show that the optimized fracturing parameters of horizontal wells are reasonable, and the technology has a good prospect of application.

关 键 词：水平井压裂 滑溜水压裂液 大液量 大排量 低砂比 裂缝监测 油井产量 

分 类 号：TE357[石油与天然气工程—油气田开发工程]