Saudi Arabian Oil Company

Mohammed H Al-Khaldi

Fawaz M Al-Otaibi

Bader Ghazi Al-Harbi

Mohamed Nabil Noui-Mehidi

Sunil Kokal

Abdullah Almoajil

Kern Larry Smith

Ali Alsalem

Mohammed G Faifi

An acid treatment composition includes a nonionic surfactant, including nonyl phenol ethoxylate. The acid treatment composition also includes a retarding agent comprising magnesium, an acid, and water. The nonionic surfactant and retarding agent of the acid treatment composition are reactive with carbonate.

Aqueous retarded acid treatment composition for well stimulation

One aspect of an emulsion includes an internal phase including acid, an external phase including supercritical carbon dioxide, and multiple nanoparticles to stabilize the internal phase and the external phase. The acid can include hydrochloric acid. The hydrochloric acid can include 15% hydrochloric acid. The nanoparticles can include hydrophobic nanoparticles. A concentration of nanoparticles in the emulsion can be at least 0.1% by weight. The emulsion can include a corrosion inhibitor. A concentration of the corrosion inhibitor can be in a range of between 0.25% and 0.6% by volume. A ratio of a concentration of the acid to a concentration of the supercritical carbon dioxide can be in a range between 30% and 70%.

Supercritical carbon dioxide emulsified acid

Methods of preventing precipitation of calcium citrate and iron-based scale during acidizing treatments and related compositions are provided as embodiments of the present invention. The acidizing treatment fluid includes citric acid and tetra-salts of EDTA.

Method for preventing calcium citrate precipitation during citric acid acidizing treatments

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Al-Khobar, Saudi Arabia

Mohammed H Al-Khaldi