Study Of Identification For Big Channel In 2, 3 Blocks Of Sanan Daqing Oilfield

After Daqing oil field enters into the mid to end exploitation phases, under the condition of persist water injection over a long period of time, the property, the dynamics characteristic of the fluid( oil and water) and the reservoir property take place the obvious variety. It cause the formation of high permeable, low efficient cycle band in the reservoir, seriously influencing the development result of the oil field and the pattern arrangement design of injection-production system. It mainly discusses how to identify the formation of high permeable, low efficient cycle band.In the aspect of geology, developping the research of subdivising sedimentary facies, heterogeneity like single sandbody in the reservoir.In the aspect of development, it analyzing the changing characteristic of monolayer pressure, produced fluid and water-cut by dynamic analysis and testing. It fixes on the main water intake interval vertically. It makes use of the new numerical simulation analysis method (backward decutive method) to calculate the spacial distribution of fluid migration and flow parameter. The distributing rule and characteristics of big channel in the reservoir can be synthetically identified according to that.Through the concrete applications in 2, 3 blocks of Sanan, It is considered scientific and synthesize because not only the dynamic factors, such as water-cut and the cumulative water injected, but also static factors are all thought over. And it has the certain maneuverability, the higher matching rate and the good application value.