The first invention patent of Jianghan Petroleum Engineering was authorized by the state

China Petroleum & Chemical News Network News Recently, the patent of "Reactive self-healing cement slurry system responding to oil and gas" independently developed by Jianghan Petroleum Engineering Company's characteristic wellbore working fluid research and development personnel was authorized by the State Intellectual Property Office
.

Casing annulus pressure is a common phenomenon in the production process of oil and gas wells at home and abroad, especially for shale gas wells.
Due to the impact of large-scale staged fracturing and other stimulation measures, the casing annulus pressure problem is more prominent and serious.
It endangers the safe production and efficient exploration and development of shale gas fields
.
At present, there are few measures and high cost to solve the problem of casing annulus pressure after cementing.

The self-healing cement slurry system developed by the company's scientific research personnel can automatically block the channeling channel when micro cracks and micro annulus appear in the cement ring, and restore the integrity of the cement ring and the interface bonding ability.

It is understood that during the promotion and application of the system in the domestic shale gas production areas, it has demonstrated the advantages of good rheology, strong self-repairing ability, good elasticity and toughness, arbitrarily adjustable thickening time, stable performance, simple formula composition and simple on-site construction.

This time, the patent successfully obtained the national authorization, which will effectively protect the company's scientific and technological achievements in the field of shale gas well casing annulus pressure prevention technology, maintain the leading position of this technology in the country, and effectively promote the company's special engineering products Continue to innovate

(Zhu Wenzhao and Li Peng)