Remaining oil distribution of delta reservoirs in waterflooding oilfield is very complicated, which is resulted from the differences of petrophysical characteristics in different facies of reservoir.
注水开发油田三角洲储层剩余油分布复杂 ，其主要原因是储层间不同微相及不同部位的岩石物理特征有明显差异。
Residual oil distribution is complicated in the thick reverse rhythm reservoir in the delta front of Shengtuo oilfield in late waterflooding stage.
注水开发后期胜坨油田三角洲前缘反韵律厚油层剩余油分布复杂。
Waterflooding is a kind of conventional measure for improving production and recovery factor in an oilfield, but there exist some formation damages such as water sensitivity, emulsification, etc.
注水是油田提高产量及采收率的一种常规措施和采油方法，但注水也存在着地层伤害，如水敏、乳化等。
Since overall waterflooding staged in the No. 301 Bei pilot area in Haila'er oilfield in 2004, rapid injection pressure rise and injectivity drop have occurred in some wells.
海拉尔油田贝301试验区块自全面投入注水开发以来，部分井存在注水压力上升快、吸水能力下降的情况。
Oilfield waterflooding into the mature development state, fractured reservoir special reservoir flow conditions and the development of the reservoir arduous and complicated.
油田进入注水开发中后期后，裂缝性油藏特殊的储集和渗流条件决定了油藏开发的艰巨性和复杂性。
In view of the characteristics of reservoirs and status of waterflooding in the second part of Gudong oilfield, we are determined to have a study on feasibility of polymer flood.
针对二区油藏特点及水驱开发现状，决定开展聚合物驱可行性研究。
In view of the characteristics of reservoirs and status of waterflooding in the second part of Gudong oilfield, we are determined to have a study on feasibility of polymer flood.
针对二区油藏特点及水驱开发现状，决定开展聚合物驱可行性研究。
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