CO2 cyclic steam stimulation process

• Main Authors: GUI ZHIWEI, ZHUO LONGCHENG, ZHAO ZIPING, WANG CHENPENG, HU WENDONG, HAN CHAO, LIN GANG, WANG BO, CAO LIYUAN, FENG GUANG
• Format: Patent
• Language: Chinese; English
• Published: 14.12.2018
• Subjects: BLASTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS; WEAPONS

The invention discloses a CO2 cyclic steam stimulation process, and belongs to the technical field of oilfield production process. The CO2 cyclic steam stimulation process comprises an installation shaft part and an installation ground blowout prevention part. The shaft part is composed of an oil pipe, a hollow rod and a metal screw pump. The ground blowout prevention part is composed of a screw pump driving device, a sucker rod blowout preventer and an oil production wellhead. The wellhead sealing can be guaranteed by the process, and the production can be resumed directly without operation after CO2 injection. 本发明公开了种CO复合吞吐工艺，属于油田采油工艺技术领域。本发明包括安装井筒部分与安装地面防喷部分，井筒部分由油管、空心杆、金属螺杆泵组成，地面防喷部分由螺杆泵驱动装置、抽油杆防喷器、采油井口组成，本发明通过该工艺可以保证井口密封，注入CO后可以不作业直接恢复生产。