Experimental Study On Development And Adjustment Of Xiang1 And Xiang2 Blocks In LJB Oilfield

As the production reaches the middle and late stages,how to maintain stable production in Liaohe Oilfield has gradually become a problem that cannot be ignored.Liaohe Oilfield has large-scale difficult-to-recover reserves,so the evaluation of these reserves becomes particularly important and urgent.How to break through the theoretical bottleneck of difficult-to-recover reserves and solve the problem of unclear understanding of the remaining oil distribution in the reservoir and the difficult use of remaining oil are of great significance for the Liaohe Oilfield to achieve sustained and stable production in the future.The LJB oilfield is located in the Liaohe Basin.This subject takes the Xiang1 and Xiang2 blocks in the LJB oilfield as examples.Analyze the development effects of the above two blocks,carefully discuss their respective development history and development status,and present the current problems of Xiang 1 and Xiang 2 blocks:Difficult steam injection in Xiang 1 block,insufficient recoverable reserves and The problem of serious water intrusion;the current pressure of the oil layer in Xiang 2 block is low,the casing is damaged to varying degrees and the water intrusion is serious.It can be seen that the serious water intrusion is a common problem existing in the two blocks.Therefore,the water intrusion status of the two blocks is carefully analyzed and the development adjustment schemes suitable for the two blocks are given separately.Three test plans were implemented for Xiang 1 block for horizontal horizontal well steam stimulation,middle vertical well with horizontal well SAGD,and steam penetration for lower horizontal wells in the water intrusion intercone zone;Xiang2 block implemented main part horizontal well steam stimulation test and side thin oil layer horizontal well Potential test plan.Based on the analysis of the production data of the test wells,it is found that except for one well that has not achieved effective production increase due to geological conditions,the production effect of the remaining test wells can achieve the expected,and based on the existing data,it is predicted that the future 1 block can be recovered The reserves will increase by about 6.623×10~5,and the recoverable reserves of 2pieces of incense will increase by about 1.76×10~5.In general,the development adjustment plan proposed in this project is feasible,effectively solving the problems facing Xiang1 and Xiang2 blocks,and broadening the thinking for Liaohe Oilfield to further achieve high and stable production.