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Oil based drilling cutting microemulsion cleaning solution and cleaning method thereof

A technology of oil-based drilling cuttings and cleaning fluid, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of complex process, high cost, and inability to realize efficient recovery of base oil, and achieve simple process and low processing cost low effect

Inactive Publication Date: 2014-11-12
CHINA PETROLEUM & CHEM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of complex process, high cost or inability to realize high-efficiency recovery of base oil in the above-mentioned prior art, and provide an oil-based drill cuttings microemulsion cleaning solution suitable for recovery and treatment of oil-based drill cuttings base oil , while providing an oil-based drilling cuttings cleaning method

Method used

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  • Oil based drilling cutting microemulsion cleaning solution and cleaning method thereof
  • Oil based drilling cutting microemulsion cleaning solution and cleaning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 30

[0014] A sample of oil-based cuttings was taken from a well in Zhongyuan Oilfield, numbered 1, and the oil content of the cuttings was determined to be 21.27%. .

[0015] Mix 50 grams of the oil-based cuttings cleaning solution prepared in Example 5 with 25 grams of the cuttings sample evenly, control the stirring speed at 300 rpm, and stir for 30 minutes, and then enter the centrifuge for centrifugal separation at a centrifugal speed of 3500 rpm; the centrifugation time is 10 minutes, and the upper liquid phase Pour out, measure the volume, and determine the oil content in solid phase. Determination of specific data is as follows:

[0016] serial number

Embodiment 31

[0018] A sample of oil-based cuttings was taken from a well in Zhongyuan Oilfield, numbered as No. 2, and the oil content of the cuttings was determined to be 21.27%.

[0019] Mix 75 grams of the oil-based cuttings cleaning solution prepared in Example 11 with 25 grams of the cuttings sample evenly, control the stirring speed at 300 rpm, and stir for 30 minutes, then enter the centrifuge for centrifugal separation at a centrifugal speed of 3500 rpm; centrifuge for 10 minutes, and the upper liquid phase Pour out, measure the volume, and determine the oil content in solid phase. Determination of specific data is as follows:

[0020] serial number

Embodiment 32

[0022] The oil-based cuttings sample was taken from a gas field in Sichuan, numbered as No. 3, and the oil content of the cuttings was determined to be 9.86%.

[0023] Mix 50 grams of the oil-based cuttings cleaning solution prepared in Example 19 with 25 grams of the cuttings sample evenly, control the stirring speed at 350 rpm, and stir for 30 minutes, and then enter the centrifuge for centrifugal separation at a centrifugal speed of 4000 rpm; the centrifugation time is 10 minutes, and the upper liquid phase Pour out and determine the oil content in solid phase. The specific data are as follows:

[0024] serial number

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Abstract

Belonging to the technical field of environment-friendly application of drilling engineering oilfield chemistry in the petroleum and natural gas field, the invention relates to an oil based drilling cutting microemulsion cleaning solution and a cleaning method thereof. For the oil based drilling cutting microemulsion cleaning solution, a surfactant, a cosurfactant, an oil phase and water are mixed in a volume percentage of (17-56):(11-18):(10-33):(21-33) to form three phases, and the middle phase is the microemulsion cleaning solution. The surfactant is ether alcohol, preferably ethylene glycol monobutyl ether or phenoxy propanol, and the cosurfactant is short chain alcohol, preferably n-butyl alcohol or isopropyl alcohol. The cleaning solution and drilling cuttings are mixed uniformly according to a mass ratio of (0.5:1)-(3:1), then solid-liquid separation is carried out, and the base oil, cleaning solution and drilling cuttings cleaned out from the oil based drilling cuttings are separated into different phases. Compared with other oil based drilling cutting treatment technologies, the process is simple, the base oil recovery rate is greater than 80%, and the residual oil content of the drilling cuttings is less than 2%, thus meeting relevant environmental protection technical standards. Also, the microemulsion cleaning solution can be used repeatedly, and the treatment cost is low.

Description

technical field [0001] The invention relates to an oil-based drilling cuttings microemulsion cleaning liquid and a cleaning method thereof, which belong to the technical field of oil field chemical environmental protection application in drilling engineering in the petroleum and natural gas industry. Background technique [0002] With the accelerated development of unconventional oil and gas reservoirs such as shale gas, the application of oil-based drilling fluids has become more and more extensive, and the environmental problems caused by oil-based drilling cuttings and waste fluids have become increasingly prominent. Oil-based drilling cuttings are classified as hazardous solid waste because they contain oil, heavy metals, organic matter and other pollutants, and the environmental management requirements are strict. [0003] With the accelerated development of unconventional oil and gas reservoirs such as shale gas, the application of oil-based drilling fluids has become ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/52
CPCC09K8/52
Inventor 位华何焕杰王中华马金马雅雅杨云鹏
Owner CHINA PETROLEUM & CHEM CORP
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