The high water cut stage on the residual oil distribution regularity in late development stage of oilfield is difficult in Daqing oilfield, North West Water Flooding fine demonstration zone development time is long, well under the complicated characteristic, adopts phase control of three-dimensional geological modeling and the method of reservoir numerical simulation in the demonstration zone, structural features and sedimentary characteristics of based on the establishment of demonstration zone, three-dimensional geological model. Through the application of fine reservoir numerical simulation method for the numerical simulation of remaining oil, and a summary of the demonstration zone of residual oil distribution law and cause of formation, provides reliable basis for the next step of oilfield development adjustment.
The study on distribution laws of remaining oil in high water cut stage is the difficulty of oil field development in the mid-to late period. Aiming at the long development time of Western Bei 2 area of Saertu oilfield in Daqing Oilfield and its complicated well history conditions undergone water flooding, polymer flooding and steam flooding, the 3D geological static model has been established in this test area based on the study on its structure characteristics and sedimentary features. By applying the method of fine reservoir numerical simulation, the paper completes the numerical simulation of remaining oil in the test area and summarizes types of remaining oil as well as their distribution laws in the test area, which provides a reliable basis for the further deployment and adjustment measures in the oilfield.
After years of research about the geothermal resources in the northern part of Songliao Basin, preliminary results have been achieved in the exploration and development of middle-shallow layer geothermal resources and oilfield production water geothermal resources. The Hot Dry Rock is as a special kind of geothermal resources, it shows the advantages of high heat, wide distribution, unaffected by the season and natural condition, etc. The exploration and utilization of the Hot Dry Rock in the deep of the northern part of Songliao Basin is very important for the energy conservation and emission reductions and the sustainable development of Daqing Oilfield which heat consumption is very higher in oil production. This article analyzed the possibility of Hot Dry Rock existing in the northern part of Songliao Basin through the study of crust structure, structure and geothermal field and predicted the favorable areas of Hot Dry Rock exploration. It indicates the direction of next step for Hot Dry Rock exploration and utilization.
Western Bei II Area in Saertu Oilfield, Daqing Oilfield is the test area. It has now entered an exploitation phase of extra high water cut stage. Under the circumstance of a long time of development and complex conditions of well history in this area, it has experienced water flooding, polymer flooding and thermal recovery. Based on basic geological characteristics in the test area, this study establishes three-dimensional geological static models and conducts the fine reservoir numerical simulation of the test area. In addition, it summarizes the temperature field distribution features before and after the thermal recovery as well as causes and distribution laws of the residual oil, which provides a reliable basis for development, deployment and measures to adjust in the next step in oilfields.
Measure of plugging water refers to through sealing high water formation to slow down the contradiction between lays, so as to increase the liquid production of low water formation and to increase the swept volume the extent of reserves producing. It is an important measure that aims at the rapid increasing of liquid-oil ratio in late stage of high water-cut, to keep the stable production of oil field. It is an effective measure to reduce and control the useless water production rate which not only can increase the fluid production sensibly but also can slow down the production decline and guarantee the economic rationality in oilfield development. Field practice has proved that the measure of plugging water has a better guiding significance to the reservoir in late high or extra high water-cut stage. Through analyzing the effect of plugging water, and a comprehensive evaluation of the effect of plugging water, we can find out the key factors that affect the measures of plugging water, which has a better guiding significance to maximize the high water cut oilfield development profit.
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