Ultralow-density cordierite petroleum fracturing propping agent and preparation method thereof

Abstract

The invention provides an ultralow-density cordierite petroleum fracturing propping agent and a preparation method thereof. A principal crystalline phase of the popping agent is of a cordierite structure and is formed by firing coal ash, caustic-burned magnesia powder, Jiaozuo clay and a composite mineralizer, and the composite mineralizer is formed by mixing manganese oxide and barium carbonate according to the equal weight ratio. A large amount of high-silicone, low-aluminum, low-calcium and low-ignition-loss neutral coal ash is adopted as a main raw material, and the density index of the popping agent is effectively reduced; through the special processing and treating processes such as special pre-sintering on an important raw material magnesite and ultrafine grinding on batches and the composite mineralizer technology, it is effectively guaranteed that high-hardness and low-density principal crystalline phase minerals are formed in a system at high temperature, therefore, and it is guaranteed that the finished ultralow-density popping agent has high mechanical strength; the firing temperature of the popping agent is reduced, and the purposes of energy saving and consumption reduction are achieved.

Description

technical field

[0001] The invention relates to a solid proppant for oil and gas well fracturing technology, in particular to an ultra-low density cordierite petroleum fracturing proppant and a preparation method thereof. Background technique

[0002] In oil and gas extraction, so-called hydraulic fracturing is widely used. This technology uses a high-pressure pump set on the ground to inject fracturing fluid carrying proppant particles into the oil well through the wellbore, so that the lower part of the oil well forms a high pressure, causing cracks in the rock formation near the bottom of the well. As fracturing fluid is pumped in, the fractures in this rock formation are pushed forward and filled with proppant. When the fracturing operation is stopped, the proppant plays the role of balancing the formation pressure, keeping the rock fractures open and having a certain flow conductivity, so as to increase the production of oil and gas fields and extend the service life o...

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