Abstract

Suizhong 36-1 oil field is located in Liaodong Bay of Bohai Sea. In the paper, residual oil content and distribution of target area is displayed and the ultimate goal is to study gas-polymer alternating injection and work out an appropriate injection scheme for it. First, gas-polymer alternating injection mechanism is demonstrated. Second, A and B platform’s fault upper area of phase I is selected as the target block to adopt gas-polymer alternating injection experiment. Third, the geological modeling for SZ36-1 oil field is established to describe sandstone distributing regularities in vertical and horizontal directions and further make it clear how residual oil distributes. Then, by the means of numerical simulation, history match is conducted. At last, through orthogonal design, the optimum injection program is determined successfully. With the help of orthogonal design, applying range analysis and variance analysis procedure, the optimum parameters of gas-polymer alternating injection are obtained from 16 forecast scenarios. They are as follows: the gas injection volume is 0.3 PV, the injection rate is 0.03 PV/a, the gas–liquid ratio is 1:2, and alternating injection cycle is 30 days. Furthermore, compared with polymer flooding, the oil recovery gas-polymer alternating injection increases by about 5%.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.