Application of organic salt drilling fluid in Well DH-8-6 of Donghe oilfield in Tarim;

A heavy organic salt drilling fluid with strong Ca 2+ resistivity was studied based on lots of experiments.

Study and application of high density organic salt drilling fluid for gypsum/salt bed.;

To satisfy the engineering requirements of the well, based on improving rheology property, lubrication and stability, a complex organic salt emulsion drilling fluid has been optimized.

An aqueous silicone drilling fluid is prepared by using 9 additives: silicone additives (inibitory agent, stabilizer) and additives of other kinds.

The well of Huo 003 was a major exploration well and employed organic salt/polyglycol/KCl drilling fluid in the third and fourth drilling section.

In districts Hongze and Huaiyin of Jiangsu oil fields, where the reservoirs are > 5000 m in depth and of temperature ~ 80℃, severe corrosion problems are encountered with G105 steel drilling tools when using salt water drilling fluids (SWDFs).

In order to safe and fast drilling in creeping salt bed in S84 Well, some technological practices were adopted, such as unsaturated salt water drilling fluid system, measurement technique of formation creeping rate and homoion effect technique, which can solve some problems during drilling operations in creeping salt beds.

Field applications of saturated salt water drilling fluid system show that this system can not only meet the demands for conventional drilling operations but also meet the demands for under balanced drilling.