Regulating agent for deep liquid flow in oil reservoir, preparation method and application thereof

Abstract

The invention provides a regulator for a deep liquid flow of an oil reservoir and a preparation method and application of the regulator. The regulator for the deep liquid flow of the oil reservoir comprises the following raw materials: a slug I and a slug II in a volume ratio of (25-40):(60-75), wherein the slug I contains the following raw materials: coco-betaine amide propyl betaine, cocamide propyl lauryl hydroxysultaine, pectin, an amide modified starch copolymer YX-I, sodium chloride, sodium polyacrylate, phenol, thiourea and the balance of water; and the slug II contains the following raw materials: high pour-point oil, kieselguhr, white carbon black, lime milk, polyvinyl alcohol, an epoxy resin, tetraethylenepentamine, silica gel powder and the balance of water. The invention further provides a preparation method of the regulator. When being applied to plugging of a deep part of a medium / deep oil reservoir injection and production well, the regulator is good in thermal stabilityand high in slug intensity, slug regulation of deep parts of oil reservoirs can be achieved, and in addition, resource recycling of high pour-point oil is achieved.

Description

technical field [0001] The invention relates to an oil reservoir regulating agent, in particular to an oil reservoir deep liquid flow regulating agent synthesized by high pour point oil sludge, and belongs to the technical field of oil reservoir exploitation. Background technique [0002] In addition to the scum and other impurities of the conventional joint station, the oil sludge also has a relatively high content of high pour point oil, which has complex components and poor fluidity. It does not have fluidity at 20°C and solidifies into agglomerates. It is diluted with three times water and the temperature reaches 60°C. It melts completely at ℃-70℃, the viscosity is less than 100mPa·s, and contains sand particles with a particle size greater than 1mm. Oil sludge at 75°C cannot be filtered with a 60-mesh screen. For example, Shenyang Oilfield is the largest high-condensation oil production base in the country. The oil sludge in the joint station mainly comes from the back...

AI Technical Summary

Problems solved by technology

The current control agents include inorganic type, polymer type, foam type, etc.; the plugging performance of the inorganic type control agent is good, but the plugging radius is small, so it can only be plugged in the near wellbore area; the polymer type control agent has a certain Good plugging ability, but poor temperature and salt resistance; foam regulator can increase the flowback ability, but the plugging strength is low and the validity period is short