Neutral composite chemical for improving production of crude oil by increasing permeability of rock stratum in oil deposit

A compound agent and permeability technology, which is applied in the direction of drilling composition, cleaning equipment, wellbore/well components, etc., can solve problems such as oil and gas layer damage, wellbore string corrosion, plugging, etc., and achieve increased permeability and safety Enhanced performance and convenience, obvious effect of advancement

Inactive Publication Date: 2017-07-18
E TECH ENERGY TECH DEV CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the disadvantages of conventional acidizing operations are: ①Due to the blockage of the pipe string and formation voids caused by the corrosion of pipelines and equipment brought into the formation during construction, the acidizing process control process requires the accuracy of the plan, and poor control will cause damage to the wellbore pipe string. consequences of corrosion
② The incompatibility between acid and oil and gas layer rocks and fluids causes damage to oil and gas layers

Method used

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  • Neutral composite chemical for improving production of crude oil by increasing permeability of rock stratum in oil deposit
  • Neutral composite chemical for improving production of crude oil by increasing permeability of rock stratum in oil deposit
  • Neutral composite chemical for improving production of crude oil by increasing permeability of rock stratum in oil deposit

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Effect test

Embodiment 1

[0023] A neutral composite agent for increasing the permeability of reservoir rock formations to increase crude oil production. It is composed of polyethylene glycol glucoside fatty ether, biological enzymes and lignin carboxylate. The mass percentage of each component of the composite agent is polyethylene glycol glucose Glycoside fatty ether 80%, biological enzyme 10%, lignin carboxylate 10%.

[0024] The structural formula of polyethylene glycol glucoside fatty ether is

[0025]

[0026] Among them, m=16 to 25, n=12 to 20

[0027] The biological enzyme is immobilized glucose isomerase, and the lignin carboxylate is sodium lignin carboxylate.

[0028] The neutral compound agent for increasing crude oil production is made by mechanically mixing polyethylene glycol glucoside fatty ether, biological enzymes, and lignin carboxylate.

Embodiment 2

[0030] Preparation and field application of a neutral compound agent for increasing the permeability of reservoir rock formations to increase crude oil production:

[0031] A neutral compound agent for increasing the permeability of reservoirs and increasing crude oil production. It is composed of polyethylene glycol glucoside fatty ether, biological enzymes and lignin carboxylate. The compounding agent composition ratio (by weight): polyethylene glycol Glucoside fatty ether 88%, biological enzyme 4%, lignin carboxylate 8%.

[0032] The structural formula of polyethylene glycol glucoside fatty ether is

[0033]

[0034] Among them, m=16 to 25, n=12 to 20

[0035] The biological enzyme is immobilized glucose isomerase, and the lignin carboxylate is sodium lignin carboxylate.

[0036] Preparation method: According to the formula amount, it is made by mechanically mixing uniformly. The preparation process of polyethylene glycol glucoside fatty ether: In a three-necked flask equipped with...

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Abstract

The invention relates to a neutral composite chemical for improving the production of crude oil by increasing the permeability of a rock stratum in an oil deposit, and belongs to the technical field of offshore oilfield exploitation. The neutral composite chemical for improving the production of the crude oil by increasing the permeability of the rock stratum in the oil deposit is characterized in that: the neutral composite chemical for improving the production of the crude oil by increasing the permeability of the rock stratum in the oil deposit comprises 80%-90% of polyethylene glycol glucoside fatty ether, 5%-10% of a biological enzyme and 5%-10% of lignin carboxylate according to mass percent; the neutral composite chemical for improving the production of the crude oil has the characteristic that the neutral composite chemical is not acid or alkaline, a completely neutral plugging remover completely avoids the damages, caused by acids and alkalis, on the stratum and a gathering and transportation system, and the neutral composite chemical has the advantages that the safety and the convenience in operation are greatly improved, etc.

Description

Technical field [0001] The invention belongs to the technical field of offshore oilfield exploitation, and particularly relates to a neutral composite agent for increasing the permeability of the reservoir rock formation to increase crude oil production. Background technique [0002] At present, in the process of crude oil extraction in offshore oilfields, due to the heterogeneity of the reservoir formation, there are often formations with extremely low permeability. In addition, during the water injection process of tertiary oil recovery, the wellbore and the near-well zone of the oil production layer are caused by fouling. As a result, the permeability of the oil layer is reduced. In order to improve the physical properties of the production layer and increase the permeability, acid liquid is often injected into the formation in the oil field, through the acid liquid to dissolve the oil layer blockage and rock components, so as to achieve the purpose of oil layer plugging and i...

Claims

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Application Information

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IPC IPC(8): C09K8/528C09K8/58C09K8/582E21B37/06
CPCC09K8/528C09K8/58C09K8/582C09K2208/32E21B37/06
Inventor 万钢亓海燕赵秀兰
Owner E TECH ENERGY TECH DEV CORP
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