| Profile control concentrates on the reservoir as a whole, based on the distribution ofunderground flow field and saturation field, combining blocking and controlling to swervedeep fluid, increase injected water swept volume and degrees of spread, decrease futilecycle, and enhance injected water efficiency. According to the reservoir characteristics ofGunan131block, with numerous research and tests, four kinds of continuousphase-dispersion phase plugging agent systems have taken shape. Movable gel comes intothe flooding channel priorly, then may stretch into other shape to go through narrow porecanals. Gel can change the direction of water and increase the swept volume. Sodiumflocculant is stabilizing inorganic particles with strong suspending power and thermalendurance power, which takes advantages of the irreversibility of clay pollution to block thestrata canal.Pre-crosslinking water varicosity particle has perfect expansibility and flexibilityin water. They can flow through pore throats by transforming crawling, unloading water anddestroying, and migrate towards the deep strata continuously. After evaluating theseplugging agents respectively, continuous phase-dispersion phase plugging agent systems areestablished and optimized. Considering that Gunan131block has dramatic differencesbetween and in strata, Using the combination type of machinery and chemical profile controlimprove the development contradictions between and in strata. PI+FD integrated determinetechnology and pre-crosslinking water varicosity particle to block large pores in immediatevicinity of wellbore on the basis of block the telescoped, control the remote withhyperthermia movable gel for deep block control and sodium flocculant for strengthen largepore blocking. Finally polymeric microsphere is used for deep profile control. After profilecontrolling, the water cut drop from98%to94%, increasing3000t accumulatively. |
PDF Full Text Request