海拉尔油田低产低效区块引效压裂治理技术

海拉尔油田断块油藏地质条件复杂、非均质性强,常规压裂措施效果不理想。为进一步提高低产低效区块整体开发效果,运用压裂工程与油藏地质一体化的研究方法,开展了复杂岩性储层岩石力学参数精细解释,明确了油田开发后期区域动态应力场变化规律;采用非对称全缝长人工裂缝模拟技术,并结合水流优势流场,进一步优化多分支裂缝压裂施工参数,实现油田整体有效动用。现场应用12个区块161口井,油井累计增产18.05×10~4 t,水井累计增注70.90×10~4 m~3,水驱控制程度提高了18.5%,措施效果显著。

Fracturing treatment technique of low production and low efficiency blocks in Hailaer oilfield

The fault block reservoirs in Hailaer oilfield are characterized by complex geological conditions and strong heterogeneity.In order to improve the development effect of low production and low efficiency blocks by the integration method of fracturing engineering and reservoir geology,the detailed interpretation of rock mechanics parameters of complex lithologic reservoirs was carried out in depth.The asymmetric full-length artificial fracture simulation technology was adopted,combined with the advantages of water flow,an effective displacement system was established,the branch fracturing parameters were optimized and the overal effective production of the oilfield was achieved.Over the past few years,161 wells have been applied on site in 12 blocks,and the total production has been increased by 18.05×10~4 t in oil wells,the total injection o water has increased by 70.9×10~4m~3,the control degree of water driving has increased by 18.5%,and the effectiveness is obvious.