Organic profile control agent and preparation method thereof

A regulator and profile technology, which is applied in the field of acidified profile regulators, can solve the problems of insufficient strength, complex construction, poor pressure resistance, etc., and achieve the effects of large particle size range, shortened construction time, and simple preparation process

Inactive Publication Date: 2019-11-19
CHINA NAT OFFSHORE OIL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The plugging effect of the profile control agent is not ideal, and the construction is complicated, the amount is large, the construction time is long, and the cost is high;
[0005] (2) The plugging selectivity is poor, and the plugging is not complete or the formation is completely blocked;
[0006] (3) Traditional profile control technology cannot carry out acidification and profile control at the same time, which increases the complexity of construction operations;
[0007] (4) After the profile control agent is plugged, the residual solid suspended matter is in the flowback solution, which makes the flowback liquid more viscous and difficult to flow back, and part of the profile control agent will cause harm to the geological environment after being discharged;
[0008] (5) The profile control agent is not easy to process, the pressure resistance is poor, the strength is insufficient, etc., so that the relevant construction technology cannot meet the standard

Method used

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  • Organic profile control agent and preparation method thereof
  • Organic profile control agent and preparation method thereof
  • Organic profile control agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First take 60g rosin (C 19 h 29 COOH) and 15g glycerol (C 3 h 8 o 3 ), transported to the reaction kettle, heated to 260°C, and polymerized for 10 hours to obtain solid particles of the profile regulator; then take the solid particles of the profile regulator in 103.8g of aqueous solution, and then add 0.8g of dodecylbenzenesulfonate in sequence sodium nitrite, 0.4g ethylene glycol monobutyl ether, 20g tartaric acid, and stir evenly to obtain a profile regulator with a suspension particle size range of 30-60 μm.

Embodiment 2

[0033] First take 65g rosin (C 19 h 29 COOH) and 20g pentaerythritol (C 5 h 12 o 4 ), transported to the reaction kettle, heated to 260°C, and polymerized for 10 hours to obtain solid particles of the profile regulator; then take the solid particles of the profile regulator in 94g of aqueous solution, and then add 0.8g of dodecylbenzenesulfonic acid in turn Sodium, 0.2 g of ethylene glycol monobutyl ether, and 20 g of malic acid are stirred evenly to obtain a profile regulator with a suspension particle size range of 90 to 120 μm.

Embodiment 3

[0035] First take 80g rosin (C 19 h 29 COOH) and 20g trimethylolpropane (C 6 h 14 o 3 ), transported to the reaction kettle, heated to 260°C, and polymerized for 10 hours to obtain solid particles of the profile regulator; then take the solid particles of the profile regulator in 89.4g of aqueous solution, and then add 0.4g of dodecylbenzenesulfonate in sequence Na2SO4, 0.2 g of isopropanol, and 10 g of malic acid were stirred evenly to obtain a profile regulator with a suspension particle size range of 120 to 150 μm.

[0036] The solubility of Examples 1-3 in water, acid and oil was measured at normal temperature (25°C) and 80°C respectively.

[0037] Take 3.5g of the profile adjuster particles and soak them in HCl and HF respectively for 1 hour, measure the mass of the profile adjuster particles after soaking, and calculate the solubility of the particles in the two acid solutions by the weight loss method.

[0038] Take 3.5g of the profile regulator particles and soak ...

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Abstract

The invention discloses an organic profile control agent. The organic profile control agent comprises 25-50 wt% of profile control agent solid particles, 0.2-0.5 wt% of a surfactant, 0.1-0.2 wt% of adispersing mutual solvent, 1-20 wt% of a water-soluble regulator, and the balance of water. The profile control agent solid particles are a reaction product obtained by heating 60-80 wt% of a naturalresin industrial product and 20-40 wt% of a polyol to 260 DEG C and performing a polymerization reaction for 10 h. The natural resin industrial product is one of rosin, Chinese lacquer, damar resin and shellac. The polyol is one of glycerol, pentaerythritol, diethylene glycol and trimethylolpropane. The organic profile control agent is a light yellow suspension system with a large particle size span, is insoluble in water and acids, and can quickly plug gun perforations and large cracks to effectively prevent a working fluid from entering the formation and selectively plug the target reservoir; and the organic profile control agent also has the advantages of simple preparation process, strong controllability, suitableness for large-scale production, and broad application prospects.

Description

technical field [0001] The invention relates to the field of profile adjustment and acidification in the process of petroleum development, in particular to a profile adjustment agent which can be used for both profile control and acidification. [0002] technical background [0003] For water injection development oilfields, due to the heterogeneity in the plane and vertical direction of the reservoir, the difference in oil-water viscosity and the imbalance inside the injection-production well group, it is bound to cause the phenomenon of tongue-injection of the injected water along the direction of the production well on the plane and in the Longitudinal intrusion along the high-permeability layer leads to uneven water absorption in the water absorption profile of the injection well, which affects the production efficiency of oil and gas. Therefore, the profile adjustment of the water injection well is proposed. At present, there are many kinds of profile adjusting agents th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514C09K8/524C09K8/42C09K8/74
CPCC09K8/426C09K8/514C09K8/524C09K8/74
Inventor 刘义刚赵立强邹剑徐昆刘长龙刘平礼卢泓羽张丽平李年银高尚杜娟兰夕堂符扬洋张璐
Owner CHINA NAT OFFSHORE OIL CORP
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