| China’s heavy oil reservoir types, buried relatively deep. In recent years, with t he improvement of various mining technology and processes to enhance deep ultra hea vy oil block, the degree of recovery and producing degree and development effect ha ve been some improvement, but still has a huge potential of exploitation of heavy oi l reservoir. At present, the most commonly used for thermal recovery of heavy oil d evelopment, namely: cyclic steam stimulation and steam flooding, fire flooding, wi th technological change, viscosity reducer has also been a good application. But for t he mining of shallow heavy oil reservoir, heat loss is too much, the above techniq ue is not economically feasible due to heavy oil viscosity is bigger, hot water floodi ng effect is very poor.Found in the continuous exploration of heavy oil reservoir in the development pr ocess, application of chemical methods in heavy oil reservoir exploitation effect better.But non miscible flooding test, test, CO2 huff and puff, flue gas three-phase foa m profile control, solid particle profile control, weak gel profile control technology,can not effectively solve the problem of late, super heavy oil steam huff and puff e xploitation of reservoir for this, people through various channels, the control techno logy of steam channeling plugging steam override, improve oil recovery profile contr ol technology, to solve for the sweep coefficient of small, low producing degree of r eservoir recovery, issues such as the poor drive steam overlaying and steam channeli ng phenomenon.This paper developed the stratum antigenic CO2 technology, the technology is th e use of chemical agents to the formation of steam injection, and then injected into a high temperature and high pressure, through the chemical reaction, generate can a nd crude oil miscible or not miscible gas, formation energy supplement hand, can i mprove the exhausting effect; on the other hand, the use of surface active agents and other the role of medicament, improve oil displacement effect; third, adjusting the formula according to the specific case, oil wells, the gas-liquid two phase to form a stable gel foam, from the longitudinal adjusting suction profile. The yield increase cycle, slow cycle oil steam ratio decrease.XYG-I increased oil cleanup agent in strata decomposition can produce a large a mount of CO2 gas, assisted steam stimulation plays an increasing oil, cleanup effect.Under certain conditions, steam injection, the additive can be decomposed as the surfactant, and generate a large amount of CO2 gas, underground fluid, emulsion b reaking and good compatibility, no corrosion phenomenon, and can improve the res ervoir producing degree, adjust the suction section, extend the production cycle of t he oil well, improve the Nissan level, become the effective measures to improve th e economic benefits, improve the effect of steam stimulation.XYG-II increased oil additives is a powerful complement to the existing profile modification / sealing technology, not only can effectively play the modification / sea ling effect, also has a viscosity, cleanup and other effects, and no pollution of oi l layer. Has the ideal sealing channeling, yield increasing effect, and provide an eff ective way for mitigation of super heavy oil well production decline speed. |
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