超低渗透油藏是指渗透率低于1.0 m D,油藏埋深2 000 m左右的难开发油藏,采油九厂动用的超低渗地质储量占比达到80.4%,但产量占比仅64.2%,在开发过程中面临着油藏三大矛盾突出,单井产量低,采油速度低,难以实现经济有效开发等诸多问题,因...超低渗透油藏是指渗透率低于1.0 m D,油藏埋深2 000 m左右的难开发油藏,采油九厂动用的超低渗地质储量占比达到80.4%,但产量占比仅64.2%,在开发过程中面临着油藏三大矛盾突出,单井产量低,采油速度低,难以实现经济有效开发等诸多问题,因此研究提高开发水平技术是实现油藏持续效益稳产最迫切、最实际的问题。近年来,课题组通过开展精细油藏描述、精细注采调控、精细措施挖潜、提高采收率技术攻关等研究与实践,取得了较好的效果,有效的提高了油藏开发水平。展开更多
The processes of flooding—water flooding, polymer flooding and ternary combination flooding—were simulated respectively on a 2-D positive rhythm profile geological model by using the ASP numerical modeling softw...The processes of flooding—water flooding, polymer flooding and ternary combination flooding—were simulated respectively on a 2-D positive rhythm profile geological model by using the ASP numerical modeling software developed by RIPED (Yuan, et al. 1995). The recovery coefficient, remaining oil saturation, sweep efficiency and displacement efficiency were calculated and correlated layer by layer. The results show that the sweep efficiency and displacement efficiency work different effects on different layers in the severely heterogeneous reservoir. The study shows that the displacement efficiency and sweep efficiency play different roles in different layers for severely heterogeneous reservoirs. The displacement efficiency contributes mainly to the high permeability zones, the sweep efficiency to the low permeability zones, both of which contribute to the middle permeable zones. To improve the sweep efficiency in the low permeability zones is of significance for enhancing the whole recovery of the reservoir. It is an important path for improving the effectiveness of chemical flooding in the severely heterogeneous reservoirs to inject ternary combination slug after profile control.展开更多
文摘超低渗透油藏是指渗透率低于1.0 m D,油藏埋深2 000 m左右的难开发油藏,采油九厂动用的超低渗地质储量占比达到80.4%,但产量占比仅64.2%,在开发过程中面临着油藏三大矛盾突出,单井产量低,采油速度低,难以实现经济有效开发等诸多问题,因此研究提高开发水平技术是实现油藏持续效益稳产最迫切、最实际的问题。近年来,课题组通过开展精细油藏描述、精细注采调控、精细措施挖潜、提高采收率技术攻关等研究与实践,取得了较好的效果,有效的提高了油藏开发水平。
基金This project is supported by the China National Key Basis Research Project (No: G1999022512)
文摘The processes of flooding—water flooding, polymer flooding and ternary combination flooding—were simulated respectively on a 2-D positive rhythm profile geological model by using the ASP numerical modeling software developed by RIPED (Yuan, et al. 1995). The recovery coefficient, remaining oil saturation, sweep efficiency and displacement efficiency were calculated and correlated layer by layer. The results show that the sweep efficiency and displacement efficiency work different effects on different layers in the severely heterogeneous reservoir. The study shows that the displacement efficiency and sweep efficiency play different roles in different layers for severely heterogeneous reservoirs. The displacement efficiency contributes mainly to the high permeability zones, the sweep efficiency to the low permeability zones, both of which contribute to the middle permeable zones. To improve the sweep efficiency in the low permeability zones is of significance for enhancing the whole recovery of the reservoir. It is an important path for improving the effectiveness of chemical flooding in the severely heterogeneous reservoirs to inject ternary combination slug after profile control.
