Tests And Studies Of ASP Displacement For Second Category Oil Layers In Northeast Area Of Daqing Lamadian Oilfield

Lamadian oil field started polymerflooding in 1996, which is the first to popularize the project largely in Daqing oil field. It is supposed that at the end of the eleventh five-year plan, the first category oil layer of Lamadian oil field enter the stage of subseqent waterflooding. And the final of the first category oil layer covery is 50-55%. It is necessary to develop ASP field pilot at the second category oil layer, which has been the leading layer after the the first category oil layer.First of all, the auther develop a study on ASP mechanism. And then through lab experiments including core tests and system property influence factor screening, as well as data simulation, we optimize ASP system recipe and decide polymer's molecular weight, injection rate and other parameters.On the basis of detailed geology knowledge on SIII4-10 oil layer at the east northern block in Lamadian oil field, we have studies on depositional characteristics of all kinds of depositional units, geometry shapes of single sand units and communicating situations of sand units. All of these information show up the heterogeneity of the reservoir. Using water submerging materials, coring materials and data simulation technology, we get a clear idea about the ASP pilot area's geological characteristics and the distribution of residual oil. We also make a forecast of development quota abuot ASP system.