Solid propping agent for oil-gas well fractrue

Abstract

The invention is about to improve the solid ceramic particle proppant of deep oil and gas well fracturing technique, the solid proppant composed of crude bauxitic clay fine powder and 6-10wt% manganese dioxide mineral fine powder. The manganese dioxide reacts with the bauxitic clay main material more completely under high temperature, largely reducing glass phase, and beneficial to raise the compactness of the resultant at the same time, able to largely heighten the guide-flow ability. The solid proppant: bulking density 1.65-1.8g / cu cm, apparent density 3.0-3.15g / cu cm, and breaking resistance (SY / T5108-1997) 86MPa not greater than 10%, the maximum able to reach 100MPa not greater than 10%.

Description

technical field [0001] The invention relates to a solid proppant for deep oil and gas well fracturing technology, in particular to a solid ceramsite proppant for relatively deep oil and gas wells. Background technique [0002] To develop deep oil and gas wells and increase production, fracturing technology is widely used. In order to ensure the opening of deep underground fracturing fractures, suitable proppant is necessary, which can enhance formation conductivity and increase oil or gas production, and is an important key to the application of fracturing technology. Due to its high strength and moderate density, sintered ceramsite has always been highly valued as the preferred proppant for fracturing. Among them, bauxite is used as the main raw material, combined with other inorganic materials to manufacture solid proppant, which is used by some manufacturers. [0003] Chinese patent 02112746 discloses a ceramsite solid proppant suitable for medium-deep oil and gas wells...

AI Technical Summary

Problems solved by technology

The main disadvantage of this solid proppant is: the soft clay and quartz in the ingredients are not well bonded to the high-temperature reaction of the main material of aluminum alum, which will easily lead to unstable product quality and large quality fluctuations; secondly, although the main crystal phase of the product is Mullite phase, but because the raw material contains a certain amount of soft clay and quartz, there is a relatively high glass phase in the product, which does not meet the requirements of the current fracturing technology, and its products are basically not used by oil and gas wells. use

However, this proppant not only needs boiled bauxite as a raw material, which increases the manufacturing cost, but also increases the product density, increases the use cost, and increases the difficulty of fracturing.