CAJ | 학술논문

针对深层气井和中浅层气井的井底积液问题并结合井况特点，介绍了两种低流压、低液量气井排液工艺。对于深井，通过从普通油管与连续油管环空定期注入压缩氮气，从而将井底积液从连续油管内举升出来；而中浅层气井为了降低成本，采用水力喷射泵将井底积液举升到地面。与其他举升工艺相比，该工艺能够更有效地减少液柱对产层的压力，因此即使产层压力很低时，产层气体也能够顺利进入井筒，较好地解决了其他排液工艺因井底低流压导致的停产问题，从而大大提高了储层的有效开采时间。
침대심층기정화중천층기정적정저적액문제병결합정황특점，개소료량충저류압、저액량기정배액공예。대우심정，통과종보통유관여련속유관배공정기주입압축담기，종이장정저적액종련속유관내거승출래；이중천층기정위료강저성본，채용수력분사빙장정저적액거승도지면。여기타거승공예상비，해공예능구경유효지감소액주대산층적압력，인차즉사산층압력흔저시，산층기체야능구순리진입정통，교호지해결료기타배액공예인정저저류압도치적정산문제，종이대대제고료저층적유효개채시간。
According to the bottom hole liquid loading problems of deep gas well and middle-shallow gas well and characteristics of well condition, two liquid unloading techniques of low lfow pressure and low liquid loading gas wells are introduced in this paper. For deep well, the compressed nitrogen is injected regularly through the annular space of ordinary tubing and coiled tubing, thus lifting the liquid from coiled tubing. For middle-shallow gas well, the liquid is pumped to the ground through hydraulic jet pump to reduce the costs. Compared with other lifting techniques, this technique can more effectively reduce the pressure of liquid column on the produc-ing formation. Even when the pressure of producing formation is low, the gas in the producing formation can lfow into the well bore smoothly. Thus, the problems of stop production in other liquid unloading techniques when the pressure of bottom hole lfow pressure is low are solved properly to increase the effective production period of reservoir bed.