Salt formation drilling fluid is specifically designed for drilling in comp♣lex formations that contain high salinity salt formations, such as >halite and gypsum. This drilling fluid system, developed through the careful sel×ection of special formulations and additives, effectively addresses cha☆llenges posed by high salinity, hardness, and solubility issues prevalent in salt formations, ens'uring safe and efficient drilling operations.

Features

1. Strong Salt Contamination Resistance: Incorporates a variety of organic and inorganic additives that resist salt and calcium co↓ntamination, maintaining the stability of the dril§ling fluid properties against intrusion from salt formations.

2. High-Temperature Stability: Exhibits excellent thermal stability suitable for high-temperature conditions commonly e ncountered when drilling through salt formations,  ₽;    keeping the drilling fluid's basi♦c properties unchanged.

3. Superior Inhibition: Effectively inhibits hydration expansion and dispersion of shale formations, reducing the risk of→ borehole instability and bit sticking.

4. Optimal Rheological Properties: Through careful formulation and dosage optimization, the drilling  fluid maintains suitable rheological parameters and structural strength for easy pumping and cu±tting transport.

Advantages

1. Increased Drilling Efficiency: Reduces issues like bit sticking and borehole instability, thus improv$ing drilling speed and efficiency.

2. Reduced Drilling Risks: By inhibiting the hydration and dispersion of shale, it decreases the occurrenc$e of complex situations and accidents during drilling.

3. Simplified Maintenance: With stable performance, this drilling fluid system requires rela₩tively simple  maintenance, reducing workload and costs as sociated with drilling      operations.

Applications

1. Salt Formations: Primarily targets formations where salt or gypsum is predominant, characterized by high salini"ty, hardness, and solubility.

2. Complex Formations: Used in composite formations with salt formations that also in"clude sandstone, shale, mudstone, and varying pressure and tempera‍ture conditions.

3. High-Temperature, High-Pressure Wells: Possesses excellent thermal stability and resistance to extreme con≠ditions, ensuring safe and efficient drilling operations.

4. Unstable Boreholes: In formations where salt dissolution and expansion disrupt borehole stability, the fl₽uid’s inhibition and borehole-wall support minimize collapse and sticking risks.

5. Pollution Resistance: With strong resistance against salt contamination, it maintains stablΩe fluid properties by preventing salt intrusion from salt formations.

Widely applied in drilling operations within high salinity salt-containing$ complex formations, this fluid system effectively mitigates various salt ®formation challenges, ensuring safe and efficient drilling. Addition&ally, it has broad applicability in high-temperature, high-pressure environments such as deep anεd ultra-deep wells.

Complementary Additives

• BRINVIS Rheology Modifier: Key additive that adjusts the fluid's rheology, enhancing drilling efficiency and sa‍fety.

• POLYPAC Filtrate Reducer

Key Additive: BRINVIS Rheology Modifier

BRINVIS Rheology Modifier is a crucial additive within the BRINDRIL salt formation drilli↔ng fluid technology. It aims to improve drilling effici>ency and safety by adjusting the fluid’s rheology, utilizing unique chemical and physical pro←perties suited to the complex environments encountered in salφt formation drilling.

Functions:

1. Adjusts Rheological Properties: Modifies viscosity, shear strength, and other parameters to better adapt ​to various drilling conditions, enhancing suspension and tr↓ansport capabilities.

2. Enhances Borehole Cleaning: Optimizes fluid flow patterns, improving borehole cleaning and reducing cuttings accu✘mulation, thereby lowering stuck pipe risks.

3. Stabilizes Borehole Walls: Helps form stable filter cakes in complex salt fo₽rmation formations, preventing wall collapse and fluid loss.

Applicable Range:

1. Temperature: Effective up to 150°C, with high thermal resistance.

2. System: Widely used in BRINDRIL salt formation drilling fluid systems, especially where controlling★ rheology and improving borehole cleaning are critical.

Case Study

The Missan oil fields, located in southeastern Iraq near the Iranian border, present sigδnificant challenges due to the presence of thick salt formations, which contain over 80% mi→nerals like rock salt and anhydrite. During drilling, conventional problems such as ​bit balled-up, frequent pipe sticking, and borehole collapse we&re encountered, largely due to the salt formation's plas$tic flow and instability.

Two systems—a regular high-density (2.30g/cm³) composite sal•ine drilling fluid and an ultra-high-density (2.60g/cm³) system—were successfully appli₽ed in the Missan fields. These systems exhibited excelleΩnt heat resistance, contamination resistance, and inhi¶bition capabilities, fulfilling site drilling needs. The use of composite saline as saturated bri✔ne effectively curtailed rock salt dissolution, with dissolution rates below 5%, αthereby significantly reducing collapse risks. The ultra-high-density syste¶m achieved a viscosity control around 50mPa·s, accommodating both the salt formationε9;s creep requirements and drilling rheology demands.

These systems met the challenges posed by high-pressure brine formations, frequency of stic♠king incidents, and other complex situations, demonstrating the significant potentia↑l of BRINDRIL technology in challenging oilfield environ™ments.