Abstract:

Korashina Anhydrate formation in the Syrian Central Region  Wells. SADAD structure is situated on the northeastern limited of Al Dow expression, and far about (37) k.m northeastern Nabik city

Litho-stratigraphic description Korashina Anhydrate formation

 (2808- 3347 )

(2808-2881): Intercalation of Anhydrite Shale, Clay and streaks Dolomite:                       

Anhydrite: white, light gray, glassy, gray, light brown, occasionally sucrosic like, medium hard, occasionally dolomitic.

Dolomite: gray, brown, light gray, very fine crystalline, medium hard, hard, anhydritic, partly argillaceous, occasionally pyritic only until (2860) m.

Shale: dark gray, gray, medium hard, laminated, partly dolomitic.

clay: gray, soft, calcareous.

(2881-3347): Salt Zone with intercalations of anhydrite, clay& Shale:

Anhydrite: white, light gray, glassy, medium hard, soft.

Shale: dark gray, gray, medium hard, laminated, slightly calcareous, partly pyritic.

clay: gray, light gray, dark gray, soft, partly pasty, slightly calcareous, partly soluble,

 considered as covering  for Korashina Dolomite and consists of succession of salt ,clay,shele.Much of the problems faced during drilling this strata like ( High over pull ,high pumps ,drill string stuck)which led in some cases to stop the drilling operation thus an increase in the drilling time ,resulting in high final cost for the completion of the well , salt mud used to drill this formation but it not completely solve the problems

This research aims to find Silicate Mud Drilling to be used to drill this formation with the least problems

we propose the following:

1. In order to evaluate the phenomenon of bulging of the glomerular formulations, we suggest that the two criteria (swell constant - pressure of bulge) be adopted together and with the lowest possible values.

2. In order to control the bloating of the shrapnel (in the structures of Abu Rabah-Al-Fayd-Sadid), we suggest using a liquid saturated with sodium chloride and potassium potassium (8 g / L).

3. We suggest that the specific weight of the proposed liquids should be 1.9-1.95 grf / cm3)

4 - Follow-up scientific research to obtain potassium silicate through the treatment of sodium silicate (a material of the remnants of the glass industry) in a substance containing potassium such as potassium chlorine or potassium salts or potassium acetate.

5- Follow-up scientific research to test the swelling pressure of the specimens with potassium chloride solution (10gr / l) with polymers (PAA, PAPH).

6 - Follow-up scientific research to find polymers containing more than polymer.