Abstract On July 16th, it was learned that the "Water for Oil" revolutionary tool independently developed by the Drilling Fluid Research Institute of the China National Petroleum Corporation Drilling Engineering Technology Research Institute - high-performance water-based drilling fluid, has been in the complex...
On July 16th, it was learned that the revolutionary tool for water and oil, independently developed by the Drilling Fluid Research Institute of the China National Petroleum Corporation Drilling and Engineering Technology Research Institute, was a high-performance water-based drilling fluid that was recently tested in the field of complex and collapsed gold dams. Success indicates that the high cost of oil-based drilling fluid development in China's shale gas development is expected to be solved. With the strong support of the Zhejiang Oilfield Company and other units, the directional drilling of the YS108H4-2 well in the horizontal well of the shale gas horizontal section, the drilling, casing and cementing construction operations were successful, the electrical test was successful, and the well diameter rule was The average well diameter expansion rate is 6%, which is close to the oil-based drilling fluid drilling, and the cementing quality inspection in the horizontal section is high quality. This indicates that the new water-based drilling fluid fully meets the needs of normal drilling operations of shale gas, and has the technical capability of “water-replacement oilâ€, reaching the leading level at home and abroad, and is expected to become a new weapon for shale gas development drilling “water for oilâ€.
The biggest challenge of horizontal well drilling in shale gas horizontal horizontal section is complex downhole problems such as shale formation collapse and high density down horizontal horizontal well high friction. The high-performance water-based drilling fluid commonly used in conventional oil and gas drilling operations cannot meet the needs of shale gas drilling. Therefore, domestic and foreign industries have to generally use oil-based drilling fluid drilling. With oil-based drilling fluids, in addition to high costs, the biggest problem is the large amount of oil-containing solid-liquid waste, which requires high oil-containing waste disposal costs.
In order to overcome this problem, the Drilling Institute has set up a research and development team for horizontal well water-based drilling fluid technology in the horizontal section of shale gas at the Drilling Fluid Research Institute. Since 2014, this team has successfully developed high-performance water-based drilling fluid systems and a series of treatment agents through a large number of indoor research and evaluation experiments, focusing on solving key technical difficulties such as strong suppression, strong sealing and high lubrication.
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