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Functional desmosome temporary plugging agent and preparation method thereof

A technology of temporary plugging agent and desmosome, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problem of heterogeneity of leakage channels, wide distribution of fracture pores, inability to accurately measure channel size and shape, loss of Channel size, shape and other issues, to achieve the effect of reducing the entry of operating fluid and particles into the formation, easy and thorough flowback, and convenient construction

Active Publication Date: 2016-03-30
SONGYUAN MARINE PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Functional desmosome temporary plugging agent and preparation method thereof
  • Functional desmosome temporary plugging agent and preparation method thereof
  • Functional desmosome temporary plugging agent and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0035] This embodiment provides a functional desmosome temporary plugging agent. Taking the total mass of the functional desmosome temporary plugging agent as 100%, the raw material composition of the functional desmosome temporary plugging agent includes: 57.36wt% of water, 0.2wt% % sodium carbonate, 0.1wt% sodium hydroxide, 0.1wt% methanol, 0.2wt% industrial octane, 0.3wt% D-glucuronic acid, 0.04wt% sodium lauryl sulfate, 1.3wt% % polyanionic cellulose, 0.2 wt% carboxymethyl cellulose, 0.2 wt% methyl tert-butyl ether (MTBE), 40 wt% potassium formate.

[0036] This embodiment also provides a preparation method of the above-mentioned functional desmosome temporary blocking agent, the preparation method comprising the following steps:

[0037] At room temperature, add water to the mixing container and stir, then add sodium carbonate, sodium hydroxide, methanol, industrial octane, D-glucuronic acid, sodium lauryl sulfate, polyanionic cellulose, carboxymethyl Base cellulose, met...

Embodiment 2

[0040]The embodiment provides a functional desmosome temporary blocking agent, based on the total mass of the functional desmosome temporary blocking agent as 100%, the raw material composition of the functional desmosome temporary blocking agent includes: 46.05wt% water, 0.4wt% Sodium carbonate, 0.05wt% sodium hydroxide, 0.2wt% methanol, 0.1wt% industrial octane, 0.5wt% D-glucuronic acid, 0.1wt% sodium lauryl sulfate, 1.7wt% polyanionic cellulose, 0.4wt% carboxymethylcellulose, 0.5wt% methyl tert-butyl ether, 50wt% potassium formate.

[0041] This embodiment also provides a preparation method of the above-mentioned functional desmosome temporary blocking agent, the preparation method comprising the following steps:

[0042] At room temperature, add water into a mixing container and stir, add sodium carbonate, sodium hydroxide, methanol, industrial octane, D-glucuronic acid, sodium lauryl sulfate, polyanionic cellulose, carboxymethyl cellulose, formazan Base tert-butyl ether ...

Embodiment 3

[0045] In this example, the functional desmosome temporary plugging agent in Example 1 was tested for its plugging ability in the formation. The experimental materials used are shown in Table 1, and the specific steps are as follows:

[0046] Vacuum the core and saturate it with standard brine for more than 48 hours;

[0047] Inject the crude oil into the core in a positive direction and press it back;

[0048] Inject the functional desmosome temporary blocking agent of this embodiment in the forward direction, press back, stop the injection when the functional desmosome temporary blocking agent appears at the outlet, and record the inlet pressure change;

[0049] Inject standard brine in the forward direction, select the low displacement of the pump at 0.05mL / min, press back, and record the inlet pressure and liquid outlet.

[0050] Table 1

[0051] standard saline

Salinity is 20000mg / L

crude oil

Density at 80°C: 0.81g / cm 3 , the viscosity is 3.0mP...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514
CPCC09K8/514C09K2208/18
Inventor 李玉梅
Owner SONGYUAN MARINE PETROLEUM TECH CO LTD
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