一种海上天然气水合物开发的钻采系统及方法
By combining CO2 gas drilling technology with an inverted funnel-shaped capping design, the drilling and production system for offshore natural gas hydrate development utilizes nitrogen to break up the overlying layer and gas lift mixtures to solve the problems of low replacement rate and extraction efficiency in the CO2 replacement method, thus achieving efficient, safe, and environmentally friendly natural gas hydrate extraction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2021-12-14
- Publication Date
- 2026-07-17
AI Technical Summary
The existing CO2 replacement method has a low replacement rate and low extraction efficiency in natural gas hydrate extraction, and there are risks such as wellbore and reservoir collapse and burying of extraction equipment.
The drilling and production system developed using offshore natural gas hydrates combines CO2 gas drilling technology with inverted funnel-shaped caps, gas lift valves, packers, and small molecule nitrogen gas to break up the overlying layer. Combined with CO2 replacement method, the mixture is lifted by gas lift for efficient extraction, and sediment backfilling is used to maintain reservoir stability.
It improves the CO2 replacement rate, increases extraction efficiency, solves the risk of wellbore and reservoir collapse, avoids natural gas leakage and environmental pollution, and realizes green, environmentally friendly, efficient and safe extraction of natural gas hydrates.
Smart Images
Figure CN116263084B_ABST