脉冲渗吸水驱油机理实验研究与分析

The study and analysis of the pulse imbibition displacement mechanism experiment

陈俊宇 唐海 李宁 张清秀 廖华伟 刘琦

Chen Junyu Tang Hai Li Ning Zhang Qingxiu Liao Huawei Liu Qi

中国石油西南油气田分公司勘探开发研究院, 四川成都 610051; 西南石油大学, 四川成都 610500; 中国石油吐哈油田分公司勘探开发研究院, 新疆鄯善 839009; 川庆钻探工程有限公司地质勘探开发研究院, 四川成都 610051

Exploration and Development Research Institute of PetroChina Southwest Oil and Gas Field Company, Chengdu 610051; Southwest Petroleum University, Chengdu 610050; Exploration and Development Research Institute of PetroChina Tuha Oil Field Company, Shanshan 839009; Geological Exploration and Development Research Institute of Sichuan-Changqing Drilling Engineering Company, Chengdu 610051

由于裂缝性油藏储集空间物理性质的复杂性和特殊性, 渗吸效果控制着低渗透裂缝性油藏水驱开发动态与开发效果, 而脉冲渗吸驱油-直被认为是低渗透裂缝性油藏有效的开发方式。在室内实验研究的基础上, 结合油藏工程等理论知识对脉冲渗吸驱油机理进行了研究, 得出脉冲增压改善基质岩块孔隙中渗吸条件是脉冲注水方式提高渗吸驱油效率的根本原因。

Physical nature of reservoir space of fracture reservoir is complex and specified, imbibition effects controls water flooding effects, and the pulse imbibition displacement has always been considered as an effective development mode of low-permeability fractured reservoirs. On the basis of indoor experiment, theoretical knowledge of reservoir engineering has been used to study the pulse imbibition displacement mechanism and results show that changing the condition of imbibition by pulse pressurization is the ultimate reason of enhanced imbibition displacement effectiveness using the pulse water flooding.