CemBOND salt-gypsum layer cementing slurry

n  Technical Introduction

    Aiming at the cementing operation of salt-gypsum layer, a cementing slurry system with strong salt resistance and high interface cementation strength was developed. The cement slurry system is composed of salt-resistant polymer fluid loss agent, reinforcing agent, dispersant and cementing agent. The system is suitable for semi-saturated brine or saturated brine slurry, with special particle size weighting agent material, can meet the temperature of 30 ~ 200 ℃, density of 1.90 ~ 2.70 g/cm³ under the condition of cementing operation.

n  Technical Features

    ( 1 ) Suitable for salt-gypsum layer, thick salt-gypsum layer cementing;

    ( 2 ) It can form good cementation with rock salt layer, which is helpful to improve cementing quality;

    ( 3 ) The cement slurry has good rheology, high compressive strength and high interfacial bonding strength;

    ( 4 ) Cement slurry temperature resistance≥200 ℃.

n  Main Components of CemBOND

    ( 1 ) Salt-resistant polymer fluid loss additive (SP-L), recommended dosage: solid type 1.2 ~ 2.5 %; liquid type: 4 ~ 8 %;

    ( 2 ) Hematite weighting agent (HT-M), recommended dosage: solid type: 0 ~ 300 %;

    ( 3 ) Polymer retarder (PRC), added as needed;

    ( 4 ) Inorganic reinforcing agent (NR-1), solid type: 1 ~ 10 %;

    ( 5 ) Aldehyde ketone polycondensation polymer dispersant (AK-P), recommended dosage: solid type 0.5 ~ 3 %; liquid type: 0.2 ~ 1.5 %;

    ( 6 ) Polymer binder (DEP-1), recommended dosage: liquid type: 3 ~ 10 %;

    ( 7 ) Modified silicone defoamer (MS-2); recommended dosage: liquid type: 0.5 ~ 1 %.

n  Key Technical Indicators

n  Application

    CemBOND is mainly used in Jianghan Oilfield of Sinopec, Kenli Oilfield of CNOOC and Missan Oilfield of Iraq, with more than 200 wells in field application.