Drilling fluid completion fluid for increasing drilling speed and preparation method of drilling fluid completion fluid

A drilling fluid and completion fluid technology, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of foaming, lack of speed-up effect, technical formula of drilling fluid and completion fluid, and high cost of vegetable oil.

Inactive Publication Date: 2014-07-02
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The current research is mainly limited to the development of a single drilling fluid speed-enhancing treatment agent, mainly by improving the drilling fluid lubricity or by improving the drilling fluid inhibition to obtain drilling speed; after adding drilling fluid, it is easy to foam, especially after high temperature The foaming is serious; manufacturing Monomers are mainly derived from mineral oil and vegetable oil. Mineral oil h

Method used

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  • Drilling fluid completion fluid for increasing drilling speed and preparation method of drilling fluid completion fluid
  • Drilling fluid completion fluid for increasing drilling speed and preparation method of drilling fluid completion fluid
  • Drilling fluid completion fluid for increasing drilling speed and preparation method of drilling fluid completion fluid

Examples

Experimental program
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Effect test

Embodiment １

[0045] Example 1: Accurately measure 500mL of fresh water and pour it into a 1000mL mud cup, place it under the S7401 low-speed stirrer, adjust the stirrer, add 0.06% anhydrous sodium carbonate while stirring, continue stirring for 5 minutes, and then add 2 % sodium bentonite, continue to stir for 2 hours, take out the mud cup and seal it for more than 16 hours; take the static mud sample and stir for 10 minutes in advance; then add 3% sulfomethyl phenolic resin while stirring, and continue stirring for 10 minutes; slowly add 0.5 % sulfonate copolymer fluid loss reducer, continue stirring for 2 hours; add 2% lignite resin while stirring, continue stirring for 10 minutes; add 0.1% viscoelastic polymer while stirring, continue stirring for 2 hours; add 0.5% Span-80 , continue to stir for 5 minutes; add 0.5% amine inhibitor, continue to stir for 5 minutes; add 3% superfine calcium carbonate, continue to stir for 10 minutes;

Embodiment 2

[0046] Embodiment 2: as embodiment 1, the difference is to add 0.5% clean and lubricating quick-drilling agent while stirring in the sample prepared by the embodiment, such as the quick-drilling agent KSZJ commonly used in the oil field mentioned in the background technology, continue to stir 10min.

Embodiment 3

[0047] Example 3: As in Example 1 and Example 2, the difference is that the samples prepared in Example 1 and Example 2 are tested for their extreme pressure lubrication coefficient by the American EP extreme pressure lubrication instrument, and Qingdao Haitongda GNF- Type 1 high temperature and high pressure adhesion tester tested the mud cake adhesion torque value, and the obtained data are shown in Table 1.

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Abstract

The invention relates to a drilling fluid completion fluid for increasing drilling speed and a preparation method of the drilling fluid completion fluid. The drilling fluid completion fluid is prepared from the following components in parts by weight: a continuous liquid phase, 0.2-1 part of a cleaning and lubrication fast drilling agent, 0.1-1 part of anhydrous sodium carbonate, 2-3 parts of clay, a tackifier, a filtrate reducer, 0-10 parts of an inhibitor, 0-1 part of a surfactant, 1-3 parts of a plugging agent and 0.1-10 parts of a weighting agent, wherein fresh water is used as the continuous liquid phase; sodium bentonite is used as the clay; lignite resin, or a sulfonate copolymer filtrate reducer, or sulfomethyl phenol formaldehyde resin is used as the filtrate reducer; super-fine calcium carbonate or expanded graphite is used as the plugging agent; barite or manganese tetraoxide is used as the weighting agent. The drilling fluid completion fluid disclosed by the invention has the advantages that the drilling fluid completion fluid can keep a low solid-phase content under the high density conditions, has excellent capacities of cleaning and wetting a mud-proof drum, preventing water blocking damage, resisting temperature and salt, lubricating to reduce frictional resistance, inhibiting and preventing collapse, and plugging, and can be used for stabilizing the wall of a well, increasing initial water loss of the drilling fluid, reducing a chip hold-down effect and increasing the drilling speed.

Description

technical field [0001] The invention relates to a drilling fluid completion fluid and a preparation method thereof, in particular to a drilling fluid completion fluid for increasing drilling speed and a preparation method thereof. Background technique [0002] With the continuous expansion of the field of oil and gas exploration and development, the formations encountered in the drilling process are becoming more and more complex, and the wells are getting deeper and deeper. The complex situation in the downhole is even more unpredictable, and the difficulty of handling is increasing. When deep wells are drilled under high pressure and encounter hard formations such as mud shale, soft shale, sticky shale and expansive shale, such formations are easy to hydrate and expand, leading to complex downhole accidents. The problem of wellbore instability in the section is particularly prominent. Especially the drilling fluid density is greater than 1.60g / cm 3 Above, the dynamic...

Claims

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Application Information

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IPC IPC(8): C09K8/14
CPCC09K8/14C09K2208/12C09K2208/28C09K2208/34
Inventor 郭保雨杨倩云王宝田柴金鹏李秀灵严波袁丽郭辉
Owner CHINA PETROCHEMICAL CORP
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