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Title: Effects of acids on gravels and proppants

Abstract

The effects of acids on the integrity of gravels and proppants should be considered in acid treatments. This paper reports on the influence of acid type, acid concentration, and contact duration on the acid solubility of five sands and bauxitic materials. The effects of the acids on the mechanical strength and the size distribution of the solids are determined. The authors found that intermediate-density and low-density bauxites (IDB and LDB) are very soluble in HF acid and that sintered bauxite is weakened by HF acid.

Authors:
Publication Date:
Research Org.:
Chevron Oil Field Research Co., La Habra, CA (US)
OSTI Identifier:
7121365
Resource Type:
Journal Article
Resource Relation:
Journal Name: SPE (Society of Petroleum Engineers) Product. Eng.; (United States); Journal Volume: 3:2
Country of Publication:
United States
Language:
English
Subject:
02 PETROLEUM; 03 NATURAL GAS; BAUXITE; ACIDIZATION; HYDROFLUORIC ACID; ROCK-FLUID INTERACTIONS; NATURAL GAS WELLS; OIL WELLS; SANDSTONES; MECHANICAL PROPERTIES; PROPPING AGENTS; ROCKS; WELL STIMULATION; ALUMINIUM ORES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; ORES; SEDIMENTARY ROCKS; STIMULATION; WELLS; 020300* - Petroleum- Drilling & Production; 030900 - Natural Gas- Artificial Stimulation, Plowshare- (-1989)

Citation Formats

Cheung, S.K. Effects of acids on gravels and proppants. United States: N. p., 1988. Web. doi:10.2118/13842-PA.
Cheung, S.K. Effects of acids on gravels and proppants. United States. doi:10.2118/13842-PA.
Cheung, S.K. Sun . "Effects of acids on gravels and proppants". United States. doi:10.2118/13842-PA.
@article{osti_7121365,
title = {Effects of acids on gravels and proppants},
author = {Cheung, S.K.},
abstractNote = {The effects of acids on the integrity of gravels and proppants should be considered in acid treatments. This paper reports on the influence of acid type, acid concentration, and contact duration on the acid solubility of five sands and bauxitic materials. The effects of the acids on the mechanical strength and the size distribution of the solids are determined. The authors found that intermediate-density and low-density bauxites (IDB and LDB) are very soluble in HF acid and that sintered bauxite is weakened by HF acid.},
doi = {10.2118/13842-PA},
journal = {SPE (Society of Petroleum Engineers) Product. Eng.; (United States)},
number = ,
volume = 3:2,
place = {United States},
year = {Sun May 01 00:00:00 EDT 1988},
month = {Sun May 01 00:00:00 EDT 1988}
}
  • The effects of acids on the integrity of gravels and proppants should be considered in acid treatments. This paper reports on the influence of acid type and concentration, exposure duration, presence of corrosion inhibitor, and formation temperature on the acid sclubility of Heart of Texas and Ottawa Sands, sintered bauxite, and low-density and intermediate-density bauxites. The effect of the acids on the mechanical strength, bulk volume and size distribution of the solids was determined. Acid dissolution mechanisms were also proposed.
  • The problems of obtaining frozen samples by core drilling of perennially frozen gravel and rock were investigated. Most the core drilling was conducted in ice-bonded, well-graded alluvial gravel with the ground temperature near its freezing point. Both chilled compressed air and oil-based liquids were used as drilling fluids. The details of both successful and unsuccessful coring attempts are reported. Drilling variables such as weight on the bit, rotational velocity, rate of penetration, fluid temperatures, viscosities, flow rates and pressures, and mechanical details of the diamond bits are reported. To make the information more widely applicable, calculated values for the pressuremore » on the bit, the lineal velocity range of the diamond points, the force per diamond point, and the uphole velocity of the fluid stream are given. Some core drilling was also successfuly accomplished in frozen, fractured rock. With careful control of the drilling variables, good samples of these difficult materials can be obtained at satisfactory drilling rates so long as the material is well bonded by ice. Suggestions are given for improvement of equipment and methods.« less
  • No abstract prepared.