Binary Combination Flooding Injection-production Process Design In Jin-16Block Liaohe Oilfield

Water-flooding development has more than20years of history in Jin-16block LiaoheOilfield. In Jin-16block most of oil wells’comprehensive water cut has been over90%, andthe recovery degree has been higher than40%. This block has entered the high exploitationstage. The block has experienced in the development of the subdivision layer, well pattern,profile control water plugging, the cycle of water injection and other adjustment andcomprehensive management, and it achieved a certain effect. However, due to the remainingoil distribution in vertical and plane fault block is getting more and more complicated, mininghas been more and more difficult. Conventional methods can not control the water cut of thefault block rising and slow down the production decreasing. It is imperative that on the basisof water flooding, how to adopt new technologies and new methods to enhance oil recoveryand increase the recoverable reserves.By improving the mobility ratio and reservoir heterogeneity extent, chemical flooding isused to obtain a better precipitation effect of increasing oil. With studying Jin-16block’sdevelopment process, geology and the basis of reservoirs, we can find the problems of Jin-16block reservoirs. Based on chemical flooding reservoir standards, we analysis the favorableconditions and feasibility of Jin-16block to carry out the binary complex system.In Jin-16block, the injection-production technology of binary complex system isdesigned to take blank water flooding to pre-register the flush, to improve the oil recovery inall kinds of oil reservoir, and then to take the weak gel deep water flooding sealing throats,improve the injected water affected efficiency, improve the effect of water flooding, improvethe weak gel profile control agent effect radius, improve the recovery degree of thecorresponding wells and inject water utilization, optimally design the process parameters,injected into the column structure and lifting method. We choose multiple matchingtechnology to protect the scale implementation effect. The results show that taking the binarycomplex oil displacement technology in Jin-16block can enhance oil recovery, and increasethe recoverable reserves.