Microorganisms agent active protecting agent used for microorganism oil extraction of high-salinity oil well

A technology of microbial oil recovery and active protective agent, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as failure to produce good oil and environmental pollution, and achieve improved recovery costs, considerable economic benefits, and improved recovery Yield effect

Inactive Publication Date: 2008-06-25
天津市工业微生物研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These characteristics of microorganisms make it impossible to produce good results in high-salinity oil wells. Therefore, chemical oil recovery methods are generally used in domestic high-salinity oil wells, and ...

Method used

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  • Microorganisms agent active protecting agent used for microorganism oil extraction of high-salinity oil well
  • Microorganisms agent active protecting agent used for microorganism oil extraction of high-salinity oil well

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0015] Example 1: Core simulated oil displacement experiment.

[0016] The microbial agent used in the test is a mixed agent: Pseudomonas (Pseudomonas.) N5, Bacillus (Bacillus.) Y4, Corynebacterium (Corynebacterium.) B7, and the volume mixing ratio is 3:3:2. The concentration of the compound bacterial agent is 10 7 ~10 9 pcs / ml, pH 5.5~6.5

[0017] KCl 1 g, NaCl 1 g, MgSO 4 0.06 g, MnSO 4 0.05 g is mixed and dissolved to form a mixed solution of inorganic salts, and mixed with 100 ml of compound microbial agent to form a mixed solution.

[0018] The specific operation steps are as follows:

[0019] 1. Prepare three stainless steel tubes with an inner diameter of 2.5cm and a length of 40cm, fill them with core sand of different meshes, seal both ends, and leave a tubular outlet.

[0020] 2. The permeability is 0.292~0.307μm 3 , vacuumize and saturate the formation water, the measured porosity is 35.7-37.3%, and the bound water is established through oil flooding, the o...

example 2

[0026] Example 2. Single well huff and puff field test

[0027] A low-yield oil well in Liaohe Oilfield was selected as an experimental oil well, and the throughput conditions are as follows:

[0028] 1. Well number for throughput operation: Well H14-35 in Haiwaihe Oilfield.

[0029] 2. Basic conditions of the operating well:

[0030] Basic data:

[0031] Production date

1996.01

Drilling depth

1800.0m

Artificial bottom

1791.54m

Completion method

Perforation

Casing specification

177.8mm

the depth

1798.80m

Cementing quality

qualified

Oil make-up distance

4.11

Set padding

4.43

Perforation thickness

17.8m

layers

5

layers

d 1

[0032] Interpretation of logging results:

[0033]

[0034] Production overview

[0035] Well H14-35 was put into production in January 1996, and the current production interval is 1591.6-1657.8m. The well is a low-...

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PUM

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Abstract

The invention relates to an inoculum active protectant used in a highly mineralized oil well in biological process for oil production, wherein inorganic salt containing K<+>, Na<+>, Mg<2+> and Mn<2+> is dissolved to form inorganic salt mixed solution. The invention has the advantages that: (1) the mixed solution which is formed through mixing the protectant with composite microbial inoculum is injected into the oil well, thereby not only improving the mineralization resistant capability of microorganism to ensure the normal growth of the composite microbial inoculum under highly mineralized conditions, but also having an action on crude oil to increase the recovery ratio of the crude oil; (2) the protectant has low cost and does not increase recovery cost when substantially increasing recovery ratio; (3) with the essential component being inorganic salts existing in nature, the protectant does not cause great influence on the environment when added in substrate; (4) the protectant can ensure effective development and utilization of national highly mineralized oil wells so as to obtain considerable economic benefit.

Description

Technical field: [0001] The invention relates to an inorganic salt mixture used in the process of microbial oil recovery, in particular to an active protective agent for bacterial agents used in high salinity oil wells for microbial oil recovery. Background technique: [0002] Injecting microorganisms into oil wells to achieve enhanced oil recovery through the degradation of crude oil by microorganisms themselves and the effect of their metabolites on crude oil is a method that has been applied to increase crude oil production and oil recovery. As early as the last century Just somebody discovers and applies, and there are literature reports one after another: US4475590 patent proposes injecting a large amount of nutrient solution from water injection well to reservoir interior to stimulate the growth and metabolism of intrinsic microorganisms in reservoir, to enhance recovery; US5163510 patent discloses that from production well The method of injecting oxygen after injectin...

Claims

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Application Information

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IPC IPC(8): C09K8/582
Inventor 魏呐张英筠姜文侠王海燕王祥河高学忠李凤凯
Owner 天津市工业微生物研究所有限公司
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