大庆外围油田致密油层叠置组合分类与开发实践  

Overlap classification and development practice of the tight reservoirs in Daqing Peripheral Oilfields

作　　者：周永炳[1] 徐启[2] 樊晓东[1] 李恒双[1] ZHOU Yongbing;XU Qi;FAN Xiaodong;LI Hengshuang(Exploration and Development Research Institute of Daqing Oilfield Co Ltd,Daqing 163712,China;No.10 Oil Production Plant of Daqing Oilfield Co Ltd,Daqing 166405,China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]大庆油田有限责任公司第十采油厂,黑龙江大庆166405

出　　处：《大庆石油地质与开发》2019年第5期195-203,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“松辽盆地致密油开发示范工程”(2017ZX05071)

摘　　要：针对大庆外围油田扶余油层致密砂岩油藏纵向小层多、层间跨度大,平面砂体错叠分布、单层厚度薄、非均质性强的特点,应用丰富的钻井、测录井和三维地震资料,开展了新一轮扶余油层区域沉积微相和开发区精细地质研究。结合地震预测甜点层分布,按纵向甜点油层叠置组合关系划分出了主力层河道砂发育区、主薄层河道砂错叠区和薄层分流河道砂叠置区3类甜点开发区,应用技术经济界限、试井分析和数值模拟等方法,系统总结了主力层河道砂发育区和主薄层河道砂错叠区立体水平井体积压裂及CO 2吞吐开发设计技术,薄层分流河道砂叠置区平台直井适度规模压裂弹性开发设计技术,优选设计了17个立体水平井、平台直井试验区,均取得了较好的开发效果,试验区地质储量动用率82.6%,产能到位率74.6%。为下一步大庆外围油田致密油藏规模有效开发提供了技术支撑。In view of the characteristics of the tight sandstone reservoir in Fuyu reservoirs of Daqing Peripheral Oilfields,such as many vertical small sub-layers,large interlayer span,staggered distribution of the planar sandbodies,thin single layer and serious heterogeneity,a new round of fine geological study on the sedimentary microfacies and developing area in Fuyu reservoirs was carried out by using abundant drilling,logging and three-dimensional seismic data.Combined with the distribution of the sweet-point layers by the seismic prediction,three types of sweet-spot development zones were classified according to the vertical sweet-point reservoir superimposition combination relationship i.e.the main-layer channel sand developed zone,the main&thin layer channel sand staggered zone and the thin layer distributary channel sand superimposed zone.The horizontal-well SRV fracturing and CO 2 huff-puff developing design technique were systematically summarized by means of the technical and economic limits,well test analysis and numerical simulation for the former two types of the zones.With the help of the elastic developing design technique of the moderate scale fracturing of the platform vertical well in the latter zone,17 three-dimensional horizontal wells and platform vertical well testing block were optimized and designed,much better developed effects were achieved for all of them,the utilization rate of the geological reserve is up to 82.6%,and the realized ratio of productivity has reached 74.6%,thus the technical support has been provided for the certain-scale effective development of the tight reservoirs in Daqing Peripheral Oilfields.

关 键 词：主力层河道砂区 主薄层河道砂错叠区 薄层河道砂叠合区 平台直井 适度规模压裂 水平井体积压裂 

分 类 号：TE348[石油与天然气工程—油气田开发工程]