中高渗油藏变驱替压差水驱特征规律研究  

Research on characteristics of water drive with variable differential pressure in medium and high permeability reservoirs

作　　者：洪亚飞 唐湘明[1] 孙东升[1] 马宏[1] HONG Yafei;TANG Xiangming;SUN Dongsheng;MA Hong(Exploration and Development Research of Jiangsu Oilfield Company,SINOPEC,Yangzhou 225009,China)

机构地区：[1]中国石化江苏油田分公司勘探开发研究院,江苏扬州225009

出　　处：《复杂油气藏》2025年第1期83-88,共6页Complex Hydrocarbon Reservoirs

基　　金：中国石化江苏油田分公司科技项目“中高渗油藏高含水期差异化剩余油表征及挖潜调整关键技术研究”(JS22011)。

摘　　要：近年来,江苏油田针对高含水期中高渗油藏开展了多个单元的增压提液调整,但实施效果迥异,部分井组见到一定的增油效果,但大多数井组呈现“只增水不增油”的情况,对于该类油藏增压提液的水驱特征规律仍然认识不清。通过开展一维短岩心变驱替压差水驱特征实验,研究了不同渗透率级差下变驱替压差岩心的含水和产液变化规律,认为提高驱替速度(驱替压差)可有效提高岩心(油藏)采出程度,但随着渗透率级差增大,增大驱替速度反而会加剧储层的动用差异,并通过长岩心实验进行了验证。基于实验认识结果指导了矿场调整,先细分层系、降低层间矛盾,再优选井组实施增压提液,油藏含水快速上升趋势得到遏制,取得明显增油效果。In recent years,Jiangsu Oilfield has carried out several units of pressure boosting and fluid extraction adjustment for medium and high permeability reservoirs in high water-cut periods,but the implementation effect is very different.Some well groups have seen a certain effect of oil increase,but most of the well groups show the situation of“only water increase but not oil increase”,and the water drive characteristics of this kind of reservoir are still unclear.By carrying out one-dimensional short core variable displacement pressure differential water drive characteristic experiments,the change law of water content and fluid production of the core under different permeability levels is studied.It is believed that increasing displacement velocity(displacement pressure differential)can effectively improve the core(reservoir)recovery degree,but with the increase of permeability level difference,increasing displacement velocity will aggravate the reservoir production difference.It is verified by long core experiments.Based on the experimental understanding,the field adjustment is guided.Firstly,the stratification is subdivided,the inter-layer contradiction is reduced,and then the well group is selected to implement the pressurization of fluid extraction.The rapid rise trend of reservoir water cut is curbed,and the obvious oil increase effect is achieved.

关 键 词：中高渗 变驱替压差 水驱特征 规律 

分 类 号：TE341[石油与天然气工程—油气田开发工程]