The Research Of Improving The Effect Of Polymer Driving In The Layer PU â…  Of The Southern Xingshugang Pool

Based on the analysis of the trial of polymer driving test-section is not effective in the southern of Xingshugang oilfield, to understand polymer driving affected two kinds of oil-layers results in the following factors: First, because of the factors of the water quality, making for the past driving system and water quality compatibility is of a sort; Second, it is very different between the purpose layers of previous tests, compatibility of the molecular weight of the polymer and the oil-layer needs for further understanding; Third, as the distance between injection and production wells is too large, the well toil of polymer driving is the low level of control to the purpose layers, the well toil and layer system of polymer driving need for further adjustment.Therefore, this article analysis the sediment environment on various oil-layers in the southern of Xingshugang oilfield, to meet the combinational principles of oil-extraction layer system, on this basis, study a reasonable combination of the layer system to determine the appropriate combination of polymer driving.Studing the manner of the cloth well on the different development block, according to development characteristics of sandstone of the purpose layer of polymer driving, analysis the level of control under different condition of the well distance, to determine the manner of the cloth well on the polymer driving .The high cation adapt to a variety of new polymer for the analysis of laboratory testing to determine the injection system.Based on sufficient prophase argumentation and preparation, pilot blockof the mine field has been selected, through the course of the trial to take the work and results were analyzed, show that:First, to adopt disengaging and preparing before inject the polymer,is better to achieve the adjustment effect for polymer driving; Second,in the aquifer decline period, to take alteration measures of oil-layer which ensures effects of polymer driving and extend the aquifer decline period; Third, take some comprehensive measures for the special single and plane well to control aquifers pick-up speed. Injection profile on the whole been effective regulation, and can get better results by oil.Through field test research, draw the following conclusions: the situation of water driving is an important factor for polymer driving affected in enhance oil-product rate; The combination of prophase argumentation layer and deployment of the well toil are reasonable; injection technics have an important impact to the effects of polymer driving.