ACIDIZING OIL AND GAS WELL OF GYPSUM-CONTAINING FORMATION

doi:10.3863/j.issn.1000-2634.1989.04.014

Abstract

Abstract:

Gypsum can dissolve in hydrochloric acid when gypsum-containing formation is acidized. During the acidizing operation, the concentration of acid solution decreases and the concentration of calcium chloride increases, the secondary precipitation of the gypsum appears. In this paper, we discuss the secondary precipitation of the gypsum by the solubilities of the gypsum in hydrochloric acid and calcium chloride solution and in spent acid during acid treatment. We also propose the methods of its prevention.

Key words: Gypsum, Carbonate formation, Well stimulation, Acidizing

Yan Xing . ACIDIZING OIL AND GAS WELL OF GYPSUM-CONTAINING FORMATION[J]. 西南石油大学学报(自然科学版), 1989, 11(4): 117-121.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.3863/j.issn.1000-2634.1989.04.014

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y1989/V11/I4/117

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ACIDIZING OIL AND GAS WELL OF GYPSUM-CONTAINING FORMATION

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