Polyphenols are widely used in drilling fluid, cement slurry and water treatment oil fields. The paper is based on the characteristics of abundant phenolic hydroxyl groups plant polyphenol compounds that can form stable complexes with iron ions, forming blueviolet to brown salts, color salts itself for light yellow, a method designed evaluate quality polyphenols, which provides simple reliable ...

The drilling time data of gas logging are used to calculate drilling time ratio of the reservoir, and the total hydrocarbon data are used to calculate hydrocarbon contrast coefficient and to establish the drilling time ratio--hydrocarbon contrast coefficient crossplot. The standards of distinguishing the boundaries of hydrocarbon zones, hydrocarbonaceous water layers and dry layers are determin...

the main task of drilling the formation by the bit is done via scraping, crushing and grinding. discharging the fluid from the bit nozzles is done with high pressure which assists to break the rocks. different parameters affect the bit selection and design for each drilling formation, but the most important one is drillability that depends on hardness of the formation. in this paper, the design...

Sand production and blockage are common during the drilling and production of horizontal oil and gas wells as a result of formation breakdown. The use of high-pressure rotating jets and annular helical flow is an effective way to enhance horizontal wellbore cleanout. In this paper, we propose the idea of using supercritical CO2 (SC-CO2) as washing fluid in water-sensitive formation. SC-CO2 is m...

It is well known that drilling fluid a key parameter for optimizing operations, cleaning the hole, and managing rig hydraulics margins of surge swab pressures. Although experimental works represent valid reliable results, they are expensive time consuming. In contrast, continuous regular determination rheological properties can perform its essential functions during good construction. The aim t...