Experimental Study On Waterflooding Field Of The Sa-0 Reservoir In North Saertu Development Area

The Sa-0 reservoir as a group of Oil combination part in the center of the daqing placanticline belongs to unused reservoir in North Saertu Development Area.Years of research results show that the Sa-0 reservoir diagenesis is weak,sensitivity is serious,mining and improvement measures are difficult.For the realization of North Saertu Development Area"high level and high efficiency and sustainable development",actively looking for new reserves resources,especially put forward to open Sa-0 reservoir test site in transition zone of North Saertu Development Area,focuses on the study of Sa-0 reservoir including effective development model,indexes variation rules and related adjustment technology,the experiment has an important significance for extra high water cut period increased potential reservoir in North Saertu Development Area and the realization of the magnificent goal of building a hundred years Oilfield.North Saertu Development Area So-layer reservoir waterflooding field test carried out in 2006,the test area is located in the zone three or four Zone North transition.Through the sealed coring research,masteres the reservoir geological environment,has a clear understanding of lithology,physical property,oil-bearing property and sensitivity to reservoir.Using numerical simulation method and comparing different well spacing in the waterflooding control degree,chooses 175?200 meters as reasonable well spacing for extraction.Comparing the advantages and disadvantages of different well pattern,combines with the actual development in oilfields,the nine point method chosen as the development pattern.Due to the reservoirs have strong water sensitivity,to solve the problem of hydration of clay mineral expansion,in the process of water injection should be added to clay stabilizer.Through the indoor core clay stability evaluation experiment,selected QY-138 type clay stabilizer.And through the concentration of optimization experiment,determine the reasonable injection concentration of 3.0%.For reservoir protection at the same time,improve the oil recovery,matching technique is adopted to develop.Through to the reservoir development index detection,clear the rule of dynamic mining,provides the theory basis for the adjustment measures.Through the fine geologic research results,a lot of dynamic and static data,laboratory experiment,numerical simulation were studied and related technical characteristics of reservoir,water flooding characteristic,tracking adjustment method,development adjustment results can be applied in the North Saertu Development Area in the future Sa-0 reservoir,the comprehensive technology after the promotion can increase the recoverable reserves of oil,and lay the foundation for realizing sustainable development of North Saertu Development area.