02121nmc a2200253 4500 20260520005608.0 260224s2001 xxu ing Inglés Analysis of Salinity Changes Caused by Brief Shut-in of Wells in Secondary Oil Recovery SPE 69567 Dallas, Texas Society of Petroleum Engineers 2001 12/09/06 ; 17/07/01 This paper presents a methodology to determine the origin and dynamics of bottomwater in a producing well influenced by several injectors in a secondary recovery pattern. This methodology requires a brief shut-in period in order to better identify the effect of flow patterns in the near wellbore region of the producer. During the shut-in period, water coming from the dominant injection wells can move forward, invading areas of a layer that has been previously occupied by other waters. Once the well is reopened, a salinity contrast between the injection and produced waters can be measured. Then, it is proposed to determine the original flow distribution around the producing well by means of a simple balance of salt mass. Salinity changes produced by shut-in injectors are analyzed as a complementary tool for identification of dominant injectors. Representative results of several cases that may arise from a hypotetical reservoir are also presented. Finally, a case study from the Neuquen Basin of Argentina is presented that demonstrates the proposed methodology. CONGTP Somaruga, C.A. 6335 Gazzera, C.E. 6336 Wouterlood, C.J. 6337 Latin American and Caribbean Petroleum Engineering Conference (7th : 2001 mar. 25-28 : Buenos Aires, Argentina) 5738 Gazzera, C.E. 6336 Wouterlood, C.J. 6337 Latin American and Caribbean Petroleum Engineering Conference (7th : 2001 mar. 25-28 : Buenos Aires, Argentina) 5738 Somaruga, C.A. 6335 131107 131107 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/LACPEC2001/Spe69567.pdf 0 0 0 0 202029 BVIAPG BVIAPG 2026-03-03 200003174 0 200003174 2026-03-03 01:41:14 2026-03-03 ARCHIVO