High-inhibition amino silanol drilling fluid and preparation method thereof

Abstract

The invention provides high-inhibition amino silanol drilling fluid and a preparation method thereof. The high-inhibition amino silanol drilling fluid is prepared from the following components in percentage by mass: 2 percent to 5 percent of bentonite, 0.2 percent to 0.5 percent of sodium carbonate, 0.3 percent to 0.5 percent of potassium polyacrylamide, 1 percent to 2 percent of valchovite, 2 percent to 3 percent of anti-collapse inhibitor, 2 percent to 3 percent of fluid loss agent, 0.5 percent to 1 percent of viscosity reducer, 1.0 percent to 1.5 percent of amido silanol and weighting agent, and the balance of water. The dosage of the weighting agent is used for adjusting the density of the high-inhibition amino silanol drilling fluid to be 1.1g / cm<3> to 1.6g / cm<3>. The high-inhibition amino silanol drilling fluid has a higher lubricating ability, so that the drilling speed can be effectively improved, meanwhile, the effects on improving reservoir protection, controlling drilling fluid rheology, improving drilling fluid pollution resistance and reducing downhole complex accident occurrence are remarkable, and the collapse problem of coal seam and carbonaceous mudstone is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a drilling fluid used in petroleum drilling engineering, in particular to a strongly inhibited aminosilanol drilling fluid and a preparation method thereof. Background technique [0002] The proportion of oil and gas resources in coal seams and carbonaceous shale formations in my country's oil and gas resources continues to expand and is widely distributed, but the exploitation of oil and gas resources here is difficult, and the development of such oil and gas reservoirs is very important for the sustainable and stable development of my country's petroleum industry. Significance. [0003] The tensile strength and elastic modulus of the coal seam are very small. If the drilling fluid density is too low, the structural stress will be released, causing the coal seam to collapse along the joints and fractures, and a large number of falling blocks will rise up and cause a...

AI Technical Summary

Problems solved by technology

This strong-inhibiting aminosilanol drilling fluid is mainly aimed at the characteristics of carbonaceous strata, which can solve the problem of coal seam and carbonaceous mudstone collapse, reduce the occurrence of complex accidents downhole, increase the drilling speed, and ensure safe and fast drilling operations.

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