摘要
鄂尔多斯盆地临兴区块致密气储层沉积条件复杂,非均质性强,连续性差,层多层薄,具有低孔、低温、低渗等特点,储层甜点预测难度大、机械钻速慢、钻井周期长、压裂改造难度大、开发效果差等问题。为此,开展了地质工程一体化技术研究,以产能为导向,逆向开展钻完井和地质方案设计。根据工程实施效果实时调整,工程作业随地质变化而实时变动,搭建包括储层滚动评价认识、钻井作业、压裂施工和现场组织管理在内的一体化协作平台。最终,形成以开发效益为导向的地质甜点精确预测技术、致密气高效钻井技术和完井生产一体化技术,建立了涵盖单井全生命周期的地质工程一体化技术体系,实现地质研究成果与工程实施的有效融合。现场应用表明,提速降本效果明显,水平井段平均砂岩钻遇率提高10%以上;机械钻速提高了57%,平均单井钻井周期节约10 d;储层伤害率降低20%;压裂完井时效提升20%,高效返排时效提高15%以上。
The tight gas reservoir in Linxing block of Ordos basin has the characteristics of strong heterogeneity,complex sedimentary conditions,poor continuity,thin layers,low porosity,low temperature and low permeability,which leads to the problems of difficult prediction of reservoir dessert,slow drilling speed,long drilling cycle,great difficulty on fracturing and reconstruction,poor development effect and so on.In view of these problems,an integrated technological research and innovation of geological engineering have been carried out.Based on productivity,reverse drilling&completion and geological scheme design shall be conducted.Real time adjustment shall be made according to the project implementation effect,and the engineering operation shall change in real time with geological changes,so as to build an integrated cooperation platform including reservoir rolling evaluation and understanding,drilling operation,fracturing construction and on-site organization and management.In the end,the development benefit oriented geological prediction technology,tight gas efficient drilling technology and well completion production integration technology are formed,and then a geological engineering integration technology system covering the whole life cycle of a single well is established to realize the effective integration of geological research results and engineering implementation.The field application shows that the effect of increasing speed and reducing cost is obvious,and the average sandstone penetration rate in horizontal well section is increased by more than 10%,ROP is increased by 57%,the average drilling cycle of single well is saved by 10 days,the reservoir damage rate is reduced by 20%,the fracturing completion efficiency is increased by 20%,and the efficient flowback efficiency is increased by more than 15%.
作者
贾佳
夏忠跃
冯雷
谢英刚
JIA Jia;XIA Zhongyue;FENG Lei;XIE Yinggang(Engineering Technology Company of CNOOC Energy Development Co.,Ltd.,Tianjin 300452,China)
出处
《石油地质与工程》
CAS
2022年第2期101-105,112,共6页
Petroleum Geology and Engineering
基金
中国海洋石油集团有限公司创新基金项目“全井段高效复合型钻井提速工具研究与应用”(CNOOC-KY-KJCX-CRI-2017-01)。
