The Reservoir Evaluation Of The Full Scale Test Of The Putaohua Oil Layer Of Weixing Oilfield

Weixing oilfield is the new oil field reported by the limited liability company, because the oilfield is found later,and its development cycle is short, the informations on the reservoir description and formation water flooded degree are lack. With additional development, the difficulty of development will increase, the specific express: the individual well producing rate decline, the absorbing capacity of oil layer decrease, the oil production rate decline, the effect of development isn't ideal. Wherefore, In order to check the formation water flooded degree and distribution of remaining oil of various Putaohua reservoir under the current well network condition, a confined coring well-examination is deployed,which is Wei 2-J30-Jian 16.On the base of domestic and abroad relative data a confined coring well-examination is deployed, as to what injection-production ratio isn't rational, using in-house experiment, evaluation are made as to those, which are the physical property character of reservoir,the orebody character of reservoir,the filtrate character of reservoir,the sensitivity character of reservoir and the hi-pressure physical property character of reservoir fluid, at the same time, The text analyzed the washing degree through identifying and calculating flooding using the distribution of pore,relative permeability and so on, the interpretational criteria of swept layer is established, the ultimate injector producer distance is confirmed, the best injector producer distance is obtained, and suggestions to current development status quo are put forward.Through this research, Putaohua is a high porosity and permeability reservoir, has filtration performance,better reservoir capacity and low expulsion pressure, it is relatively good reservoir; Reservoir lithology is mainly fine-grained rock Chip feldspar sandstone, the main type of cement is pore-cement; Sensitivity analysis shows that reservoir velocity sensitive and acid sensitivity are weak, water and alkali-Min Min are strong, critical salinity is 5000 mg / l, water and alkali-Min Min factors are proposing considered in oilfield injection fully in the process of developing, and not the velocity sensitive acid and acid sensitivity; Oil washed results show that the the state of water reservoir used is poor, amony the five effective thickness layers,only Pâ… 4 is washed; Residual oil is mainly distributed in Pâ… 1,P21,P22,P5, the four small layers are the focus of future development; through the analysis of the state of connectivity,the worse connectivity situation is the main reason of the poor state of oil washed use; Corresponding measures are taken asto different connectivity; the criteria established is examinationed using the result of interpretation of the Log, they are all in line with the rate of the planned targets; useing the initiated pressure gradient under the conditions of restraint water and the seconomic evaluation, 300 meters is given for the best injector producer distance...