HCl/HF acid-resistant cement blend; Model study and field application

Journal Article · Fri Feb 01 04:00:00 EST 1991 · Journal of Petroleum Technology; (USA)

DOI:https://doi.org/10.2118/19541-PA· OSTI ID:6027124

Blount, C G; Brady, J L; Gantt, L L; Heusser, J M ^[1]; Hightower, M ^[2]; Fife, D ^[3]

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1. Arco Alaska Inc., Prudhoe Bay, AK (US)
2. Arco Oil and Gas, Plano, TX (US)
3. Shell Western E and P, Inc. (US)

Analysis of Prudhoe Bay field stimulation data suggests that HF-acid treatments are harmful to wellbore cement. Laboratory tests confirmed the suspected solubility of conventional oilfield cements in hot-acid solutions. Test results indicate that a 2-in. cement cube is up to 96% soluble in a dynamic solution of 12% HCl/l3% HF (mud) acid at 190{degrees}F. A wellbore simulator was developed to correlate cube solubilities to downhole conditions. This paper documents equipment and testing procedures used to confirm acid solubility of cement-squeezed perforations in a typical wellbore. It also documents additive screening that led to the development of an acid-resistant cement (ARC) blend that uses liquid latex. This blend improved acid resistance by more that 700% over conventional formulations under simulated field conditions and configuration. The latex cement blend was also demonstrated to be compatible with coiled-tubing-unit cement-squeeze applications.

• OSTI ID: 6027124
• Journal Information: Journal of Petroleum Technology; (USA), Journal Name: Journal of Petroleum Technology; (USA) Vol. 43:2; ISSN JPTJA; ISSN 0022-3522
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
BUILDING MATERIALS
CEMENTS
CORROSION PROTECTION
CORROSION RESISTANCE
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
OIL WELLS
SIMULATION
WELLS