Functional desmosome temporary plugging agent and preparation method thereof

Abstract

The invention provides a functional desmosome temporary plugging agent and a preparation method thereof. Counting the total mass of the functional desmosome temporary plugging agent at 100 percent, the functional desmosome temporary plugging agent is prepared from the following raw materials by weight percent: 45 to 58 percent of water, 0.2 to 0.4 percent of sodium carbonate, 0.05 to 0.1 percent of sodium hydroxide, 0.1 to 0.2 percent of methanol, 0.1 to 0.2 percent of octane, 0.3 to 0.5 percent of D-glucuronic acid, 0.04 to 0.1 percent of lauryl sodium sulfate, 1.3 to 1.7 percent of polyanionic celluloses, 0.2 to 0.4 percent of carboxymethyl celluloses, 0.2 to 0.5 percent of methyl tert-butyl ether and 40 to 50 percent of potassium formate, wherein the sum of the mass percent of all raw materials in the functional desmosome temporary plugging agent is 100 percent. The invention also provides the preparation method of the functional desmosome temporary plugging agent. The functional desmosome temporary plugging agent belongs to an oil-gas layer temporary plugging agent integrating shielding temporary plugging, oil-gas layer protection, leakage prevention and leakage plugging.

Description

technical field [0001] The invention relates to a temporary plugging agent and a preparation method thereof, in particular to a functional desmosome temporary plugging agent and a preparation method thereof, belonging to the technical field of oilfield exploitation. Background technique [0002] Horizontal wells have been widely used in various oil fields due to their advantages in many aspects. However, due to factors such as long production intervals of horizontal wells, strong formation heterogeneity, and large difference in oil-water viscosity, the liquid production profile is uneven, edge-bottom water or injected water partially breaks through, water cut rises, and there is still a large amount of remaining oil in the potential section. . Therefore, water control in horizontal wells becomes particularly important. However, due to the heterogeneity of the formation, during the construction of chemical water plugging, it is inevitable that the plugging agent will enter ...

AI Technical Summary

Problems solved by technology

However, due to the heterogeneity of the leakage channel and the broadness of the pore distribution of the leakage fracture, the size and shape of the leakage channel can only be determined by measurement means to determine its belonging to a certain range, and the size and shape of each channel cannot be accurately measured.

Therefore, the existing bridging temporary plugging materials cannot fully seal the formation; in addition, the same lost formation, different pressure systems of the same wellbore, the requirements for the plugging strength of flexible plugging materials and non-flexible plugging materials are different, resulting in Inefficient plugging

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