Tower I, Condensate Gas Reservoirs To Improve Condensate Recovery Mechanism

The fissure-hole carbonatite condensate gas reservoir with oil ring that main reservoir space include cracks, holes and small caves and that main seepage channel are cracks and microcracks system.but crack permeability is low and the diversion ability is poor. The original reservoir fluid is mainly for the saturation of condensate gas. single-phase flow time is very short, in the process of mining is a process of oil gas water three phase flow.Because of the reservoir pressure failure quickly, gas well production decline rapidly and wellbore fluiding effusion is serious, leading to the rich reserves of condensate oil cannot be produced effectively, the whole gas field recovery efficiency is low. The Ta Zhong I number condensate gas reservoir as the typical characteristicsAiming at this situation, in this paper, first of all, we carried out some experiments that considering the different reservoir physical properties and energy of the gas reservoir water, comparing countless water extraction, limited bottom water, the partial pressure water injection and gas recover)’law under the constant pressure water injection in four kinds of circumstances, Clearly knowing reservoir fluid flow mechanism;second. we analyzed production dynamic characteristic and evaluated the changing of formation pressure and checked the gas well water invasion and reserves producing energy of Ta Zhong62wellblock and Zhong Gu8wellblock; Finally, according to the reservoir characteristics and production characteristics, we conducted a series of13water injection and gas injection huff and puff experiments, detailed analysis and evaluation of reservoir conditions, injection timing, injection rate and condensate oil content effect on the condensate oil recovery,combined with the mathematical theory model of gas condensate recovery and water flooding or gas injection huff and puff to improve condensate oil recovery mechanism by improving the state equation of phase state simulation process;we put forward to injection pattern and injection-production parameters of improving condensate oil recovery that what Suitable for Ta Zhong62wellblock and Zhong Gu8wellblock. This research has an important guiding significance to improving condensate oil recovery and the stability of natural gas production of the Ta Zhong I number condensate gas reservoir, at the same time, for the same type of other condensate gas reservoirs’ development also has important reference value...