Method for treating potassium amino polysulfonate drilling fluid

A technology of potassium amine-based polysulfonate drilling and polysulfonate drilling, which is applied in chemical instruments and methods, earthwork drilling, wellbore flushing, etc., and can solve the problem of particle size, particle size, and It is not possible to raise problems such as adapting drilling fluid and unfavorable formation of dense filter cake, so as to achieve good filtration loss and wall building performance and rheological performance, ensure the inhibition of hydration and plugging and anti-slumping performance, and improve the effect of inhibiting and anti-slumping performance

Pending Publication Date: 2021-12-07
宋晓勇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing drilling fluid treatment method does not pay attention to the impact of the feeding sequence on the quality of the finished product when feeding the drilling fluid. The particle size of the drilling fluid system is too large if the inhibitor is added first, which is not conducive to the formation of a dense filter cake, and the filtration loss and wall building performance is poor. ;The first coating agent drilling fluid system has fewer particles with larger and smaller particle sizes, poor filtration loss and wall building performance, and it is not possible to propose suitable drilling fluid treatment for different drilling depths and geology method, for this reason, we propose a potassium aminopolysulfonate drilling fluid treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] (1) Geological survey

[0040]The depth of the drilling section is 1000-5213m, and the Neogene, Paleogene, Cretaceous, Triassic and Permian igneous rock formations are mainly encountered, and Paleogene, Cretaceous and Jurassic sandstone and mudstone are interbedded with different thicknesses. The lithology of the Triassic strata is dominated by mudstone, glutenite is developed in the lower part of the Ketuer Formation, and basalt, dacite, tuff and mudstone are developed in the Permian igneous rock segment according to geological predictions;

[0041] (2), Potassium Amino Polysulfonate Drilling Fluid Preparation

[0042] 1000-3500m well section according to 3.5-4.5% bentonite slurry + 0.2-0.5% polyacrylamide potassium salt + 0.5-2% fast drilling agent + 0.3-0.5% polyamine + 2-3% NPAN + 0.5-1.0% drop filter The preparation ratio of loss agent + 1-2% plugging agent is used to prepare drilling fluid;

[0043] 3500-5213m well section according to 3-4% bentonite slurry + 0....

specific Embodiment 2

[0050] (1) Geological survey

[0051] The depth of the drilling section is 5213-7650m, and mainly encountered Sankai Carboniferous, Silurian and Ordovician Sangtamu Formation. Sandstone is developed in part of the Murray and Ordovician Sangtamu Formation, and argillaceous limestone, calcareous mudstone, and argillaceous micritic limestone are developed in Lianglitage Formation and Charbak Formation;

[0052] (2), Potassium Amino Polysulfonate Drilling Fluid Preparation

[0053] 5213-7650m well section according to 3-3.5% bentonite slurry + 0.1-0.3% coating agent + 0.5-1% polyanionic cellulose + 0.3-0.5% polyamine inhibitor + 2-3% ultrafine calcium carbonate + 2- 4% anti-high temperature anti-collapse agent + 2-4% sulfonated phenolic resin + 2-4% lignite resin + 3-5% potassium chloride + 1-2% nano-micron plugging agent + 0.5-1.0% fast drilling agent The configuration ratio is used to prepare the drilling fluid;

[0054] (3) Potassium aminopolysulfonate drilling fluid constru...

specific Embodiment 3

[0060] (1) Geological survey

[0061] The depth of the drilling section is 5928-7275m, and mainly drilled in Ordovician Qierchaike Formation and Qierbaike Formation, the main lithology is: gray mudstone, lime mudstone, diabase, brown lime mudstone, yellow gray mud Limestone;

[0062] (2), Potassium Amino Polysulfonate Drilling Fluid Preparation

[0063] 5928-7275m well section according to 3-3.5% bentonite slurry, 0.1-0.3% coating agent, 0.5-1% polyanionic cellulose, 7-10% potassium chloride, 0.5-1.0% polyamine inhibitor, 2-4 %sulfonated phenolic resin, 2-4% lignite resin, 1-2% sulfonate copolymer fluid loss additive, 2-3% cationic asphalt latex, 2-3% sulfonated asphalt or natural asphalt powder, 3-5% % superfine calcium carbonate, 1-2% micro-nano plugging agent configuration ratio for drilling fluid preparation;

[0064] (3) Potassium aminopolysulfonate drilling fluid construction

[0065] Sufficient heavy slurry is stored on site, 50-100m in front of the intrusion body, ...

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Abstract

The invention discloses a method for treating potassium amino polysulfonate drilling fluid, and relates to the technical field of drilling fluid. The method comprises the following steps: (1) geological general situation research: before drilling fluid treatment, firstly researching the drilling depth of a drilling position and the geological condition of the drilling position, and according to the difference between the drilling depth and the geological condition, targetedly formulating a drilling fluid formula of the potassium amine polysulfonate drilling fluid, wherein the drilling fluid formula specifically comprises a formula I, a formula II, a formula III and a formula IV, (2) preparation of the potassium amine polysulfonate drilling fluid; and (3) construction of the potassium amine polysulfonate drilling fluid. The treatment method of the potassium amine polysulfonate drilling fluid is suitable for petroleum drilling in mesozoic and paleozoic stratums, and during preparation, a drilling fluid treatment agent is added according to the sequence of a fluid loss agent, a 30% coating agent, an inhibitor and a 70% coating agent. The particle size distribution is wide according to the adding sequence, effective accumulation of clay particles is facilitated, a compact filter cake is formed, and the filtration wall-building performance and the rheological property are both good.

Description

technical field [0001] The invention relates to the technical field of drilling fluids, in particular to a method for treating drilling fluids with potassium aminopolysulfonate. Background technique [0002] Drilling fluid, also known as mud and flushing fluid, is an essential circulating medium in drilling construction and the "blood" of drilling. Drilling fluid can be divided into clear mud, water-based mud, non-water-based mud (commonly known as oil-based mud) and gas drilling fluid according to its composition. [0003] The existing drilling fluid treatment method does not pay attention to the impact of the feeding sequence on the quality of the finished product when feeding the drilling fluid. The particle size of the drilling fluid system is too large if the inhibitor is added first, which is not conducive to the formation of a dense filter cake, and the filtration loss and wall building performance is poor. ;The first coating agent drilling fluid system has fewer par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24C09K8/508E21B21/00
CPCC09K8/24C09K8/508E21B21/00C09K2208/10C09K2208/12
Inventor 宋晓勇
Owner 宋晓勇
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