单井注干气吞吐技术在柯克亚凝析气田的应用

应用数值模拟技术,研究地层中反凝析液饱和度的变化规律和注干气吞吐技术的开发效果.研究表明,反凝析液主要聚集在井筒附近地层中,饱和度最高可达17%;通过注干气吞吐技术,可以把井筒附近地层中的反凝析液部分"反蒸发"或挤往远处地层,改善近井地带地层渗流能力而增产.柯克亚凝析气田已经作了8井次的注干气吞吐试验,其中7井次见到明显效果.矿场试验结果表明,应用注干气吞吐技术可有效解决近井地带的反凝析污染、提高或恢复单井产能.对改善凝析气藏的开发效果具有重要意义.

APPLICATION OF THE TECHNOLOGY OF THE DRY GAS INJECTION HUFF AND PUFF ON SINGLE WELL IN KEKEYA GAS CONDENSATE FIELD

Using numerical simulation method, the retrograde condensation saturation variety and the development effect of the single well dry gas injection is studied. The huff and huff results show the retrograde condensation liquid concentrates in the formation near well-bore, the maximum saturation is 17% . After the dry gas injection huff and huff in the gas condensate well, the part of the retrograde condensation liquid near the well-bore will be reverse -vaporized or squeezed to the far formation, the permeability of the layer near the well-bore will be improved and the production capacity of the well will be increased. The eight-time tests of the dry gas injection huff and puff of the gas condensate wells have been done in Kekeya gas condensate field, seven times succeed. The in-situ test result shows, the technology of the dry gas injection huff and puff of the gas condensate well can control the damage of retrograde condensation near the well bore, improve or recover the productive capacity, which are of great significance to the development of gas condensate reservoirs.