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Organosilicon polysulfonate drilling fluid

A polysulfide drilling and silicone technology, applied in the field of petroleum drilling fluid, can solve the problems of poor temperature resistance, poor lubricity, and poor rock-carrying ability, and achieve the effects of low damage, strong suppression, and low friction

Inactive Publication Date: 2012-12-05
DAQING PETROLEUM ADMINISTRATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the common problems of water-based drilling fluids used in deep horizontal wells are poor rock-carrying ability, poor temperature resistance, and poor lubricity, etc.

Method used

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  • Organosilicon polysulfonate drilling fluid

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Experimental sample

[0012] Judging from the results of the rolling recovery rate comparison evaluation test and swelling test of a single agent, FA367 with an addition of 0.6 to 0.8% and polyether polyol anti-slump agent DPC-1 with an addition of 3 to 5% both have good inhibitory effects. sex.

[0013] (2) Selection of viscosifiers The selection of viscosifiers is to solve the problem of reduced cuttings-carrying capacity caused by the small kinetic-plastic ratio of drilling fluid in the high-inclination section. In order to match the effects of inhibitors and anti-slump agents, xanthan gum, guar gum and polyanionic cellulose PAC-HV were selected. FA367 was used to make the base slurry, and the effect of viscosifier was investigated. The experiment was carried out according to "Drilling Fluid Field Test Part One: Water-based Drilling Fluid GB / T16783.1-2006 / ISO 10414-1:2001", and the experimental results are shown in Table 2 : Table 2 The comparison of the v...

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Abstract

The invention relates to organosilicon polysulfonate drilling fluid, which comprises the following components in percentage by weight: A, 0.6 to 0.8 percent of zwitterionic polymer FA367, B, 0.6 to 0.8 percent of polyanionic cellulose PAC-HV, C, 1 to 5 percent of KFT, D, 1 to 4 percent of OCL-JB, E, 0.1 to 0.4 percent of KOH, F, 1 to 4 percent of sulfonated asphalt DYFT-II, G, 3 to 5 percent of polyether glycol anti-collapse agent, H, 5.0 to 10.0 percent of RH-3, I, 5 to 15 percent of white oil, G, 1 to 5 percent of QS-2 and the balance of water. The drilling fluid has the characteristics of higher temperature resistance, strong inhibition performance, and low friction drag and damage performance; and the treating agents selected in the system are applied to oil drilling, and the drillingfluid has the characteristics of non-toxicity and environment friendliness, meets the requirement of the drilling fluid of a deep horizontal well, and can be used for drilling the deep horizontal well.

Description

technical field [0001] The invention relates to a petroleum drilling fluid, in particular to a water-based drilling fluid used in deep horizontal wells. Background technique [0002] Domestic deep horizontal wells are mainly concentrated in Xinjiang and Tarim Oilfields. The vertical depth generally exceeds 5,000 meters, the inclined depth is more than 6,000 meters, the horizontal section length is about 500 meters, and the bottom hole temperature is within 150°C. After 2000, especially in recent years, water-based drilling fluids have been commonly used in deep and horizontal wells in Xinjiang, and polymer drilling fluid, sulfonate drilling fluid and polysulfonate-mixed drilling fluid systems have been used in the drilling of more than 10 horizontal wells. [0003] For horizontal wells in gas reservoirs, Changqing Oilfield was the first to carry out work in China. Oil-based drilling fluid was used in the development of Sulige Gas Field. Later research found that low-permeabi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/12
Inventor 潘永强杨智光杨决算刘永贵郝立志梁勇杜树勇李建军朱科源林立强李保山
Owner DAQING PETROLEUM ADMINISTRATION