Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Micro-emulsion for water base drilling fluid for blocking micro-cracks in shale stratums

A technology of water-based drilling fluid and plugging mud, which is applied in the field of microemulsion, can solve the problems of poor micro-pores and micro-cracks, etc., and achieve good plugging effect, stable performance, and the effect of slowing pressure transmission

Inactive Publication Date: 2016-07-20
SINOPEC SHENGLI PETROLEUM ENG CO LTD DRILLING TECH RES INST
View PDF7 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a plugging mud shale for water-based drilling fluid with small particle size, stable performance, and strong deformation and plugging ability to solve the problem that the existing technology is used for plugging micropores and microcracks. microemulsion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In parts by weight, 42 parts of No. 10 white oil, 1 part of sodium chloride, 5 parts of sorbitan fatty acid ester, 12 parts of n-amyl alcohol, 8 parts of nano-calcium carbonate, 5 parts of fatty alcohol ether phosphate, organic silicon 0.5 parts of defoamer, 25.5 parts of water.

[0019] The storage stability and particle size distribution of the microemulsion were investigated according to the following experimental methods.

[0020] Placement stability: The product is placed statically for a long time, observe the appearance, and pay attention to whether there is delamination.

[0021] Particle size distribution: use LB550 dynamic light scattering particle size distribution meter to measure the particle size distribution of the microemulsion.

[0022] The experimental results are: no delamination after being placed for 180 days; d90 value is 148.4nm.

Embodiment 2

[0024] In parts by weight, 36 parts of kerosene, 1.5 parts of potassium chloride, 4 parts of sodium dodecylbenzenesulfonate, 6.5 parts of tall oil fatty acid, 6 parts of nano calcium carbonate, 10 parts of ethylene glycol, polyether F-60.3 parts, 35.7 parts of water.

[0025] Tested according to the method described in Example 1, the experimental results are: no delamination after being placed for 180 days; d90 value is 96.6nm.

Embodiment 3

[0027] In parts by weight, 50 parts of No. 10 white oil, 1 part of sodium acetate, 6.5 parts of polyoxyethylene sorbitan monostearate, 4.5 parts of triethanolamine, 10 parts of nano-silica, 6 parts of propylene glycol, propylene glycol block 0.3 parts of polyether, 21.7 parts of water.

[0028] Tested according to the method described in Example 1, the experimental results are: no delamination after being placed for 180 days; d90 value is 156.2nm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of chemical materials for oilfield exploration, and discloses a micro-emulsion for water base drilling fluid for blocking micro-cracks in shale stratums. The micro-emulsion is composed of the following components in percentage by weight: 35 to 55% of mineral oil, 4 to 8% of surfactant, 4 to 15% of co-surfactant, 1 to 2% of salt, 5 to 10% of nano stabilizer, 5 to 10% of nano dispersant, 0.3 to 0.5% of antifoaming agent, and the balance being water phase. The provided micro-emulsion can be diluted infinitely, and has the advantages of small particle size and stable properties. After long time storage, the quality is not changed, and layering does not happen. The micro-emulsion can be used as a drilling fluid processing agent and is capable of being directly added into drilling fluid on site; the properties of drilling fluid are not influenced, the filter loss of drilling fluid can be effectively reduced, the blocking effect is good, and moreover, the micro-emulsion has a good lubricating performance.

Description

technical field [0001] The present invention relates to a kind of micro-emulsion used for oil drilling to plug micro-pores and cracks in shale formations, in particular to a kind of micro-emulsion for plugging micro-pores and micro-pores of shale formation rocks used in water-based drilling fluid in oil field drilling process. The microemulsion in the fracture can effectively reduce the intrusion of filtrate and the transmission of pressure, which is beneficial to ensure the stability of the well wall. Background technique [0002] In the current oil and gas exploration and development process, wellbore stability is still the primary problem facing the drilling industry. In particular, the problem of wellbore stability in shale formations is particularly prominent. Statistics at home and abroad show that more than 90% of well collapses occur in shale formations, of which hard and brittle shale formations account for about 2 / 3, and soft shale formations The strata account fo...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K8/42
Inventor 张敬辉李公让乔军刘宝锋于雷蓝强陈健夏晔
Owner SINOPEC SHENGLI PETROLEUM ENG CO LTD DRILLING TECH RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products