Seawater invasion and full invasion period space-time monitoring and early warning method for underground petroleum reserve

• Main Authors: HE SHENGQUAN, SONG DAZHAO, QU JIANJUN, YANG LIANZHI, LIANG JIUZHENG, MIAO XIAOMENG, CAO BIAO, HE XUEQIU
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2023
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a time-space monitoring and early warning method for seawater intrusion and full-intrusion period of an underground petroleum reserve reservoir, which comprises the following steps of: placing a Cl <-> concentration detector in drill holes at the periphery of a reservoir area, and monitoring a seawater intrusion boundary in real time from the scale of the full reservoir area; a Cl <-> concentration detector is arranged on a cave depot water cushion layer, and a seawater invasion area is accurately positioned from the interior of a cave; drilling and Cl <-> concentration detectors in the water cushion layer are combined to monitor the whole process of seawater invasion of the underground petroleum storage; and in combination with the space-time early warning parameters, carrying out space-time comprehensive early warning in the whole intrusion period of reservoir area seawater intrusion boundary appearance, movement and intrusion to the cavern. On the basis of space and time differences