Three-protection-function water-base drilling fluid system

A liquid and drilling technology, applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve problems such as narrow application range, inability to meet environmental protection requirements at the same time, environmental protection and performance index impact, etc.

Inactive Publication Date: 2020-08-25
石家庄华莱鼎盛科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Some of the above-mentioned strong inhibition water-based drilling fluid systems contain a large number of sulfonic acid groups, which have a certain risk of environmental pollution, and some have limited sand-carrying ability, and are affe...

Method used

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Embodiment 1

[0038] Embodiment 1: the three water-based drilling fluid system of the present invention is characterized in that it is made of the following mass ratio raw materials: 1000 parts of tap water, 40 parts of bentonite, 2 parts of sodium carbonate, 0.6 parts of sodium hydroxide 5 parts, coating agent HLBE-2 5 parts, fluid loss additive HLJ-1 8 parts, fluid loss additive HLJ-6 20 parts, polyanionic cellulose PAC-LV 6 parts, high temperature salt-resistant fluid loss additive HLKY- 26 parts, 25 parts of wall-solidifying agent HLGB-3 (no component poly-1,3-propylene chloride pyridinium chloride during preparation), 20 parts of liquid lubricant HLR-2, 20 parts of lubrication inhibitor HLRH-3, drilling 20 parts of solid lubricant (RH203-1) for liquid, 70 parts of inhibitor HLY-37, 70 parts of KCl, 2.5 parts of gel plugging agent HLN-1, 13 parts of ultrafine calcium carbonate powder, weighting agent, the amount of weighting agent should be The mud density after adjustment can reach 1.2...

Embodiment 2

[0039] Embodiment 2: The Sanbao water-based drilling fluid system of the present invention is made from the raw materials of the following mass ratio: 1000 parts of tap water, 45 parts of bentonite, 2.5 parts of sodium carbonate, 0.7 part of sodium hydroxide, coating agent HLBE-2 4 parts, fluid loss additive HLJ-1 7 parts, fluid loss additive HLJ-6 18 parts, polyanionic cellulose PAC-LV 7 parts, high temperature salt-resistant fluid loss Wall agent HLGB-325 parts (no component poly-1,3-propylene chloride pyridinium chloride during preparation), liquid lubricant HLR-2 22 parts, lubrication inhibitor HLRH-3 22 parts, solid lubricant for drilling fluid ( RH203-1) 22 parts, inhibitor HLY-3 8 parts, KCl 75 parts, gel plugging agent HLN-1 2.2 parts, superfine calcium carbonate powder 12 parts, weighting agent, the amount of weighting agent should meet the mud density after adjustment up to 1.30g / cm 3 requirements; the main component of the inhibitor HLY-3 is tetraethylenepentamine;...

Embodiment 3

[0040] Embodiment 3: The Sanbao water-based drilling fluid system of the present invention is made from the following mass ratio raw materials: 1000 parts of tap water, 50 parts of bentonite, 3 parts of sodium carbonate, 0.9 part of sodium hydroxide, coating agent 5 parts of HLBE-2, 16 parts of fluid loss additive HLJ-16, 16 parts of fluid loss additive HLJ-6, 7 parts of polyanionic cellulose PAC-LV, 10 parts of high temperature salt-resistant fluid loss additive HLKY-2, solid wall 25 parts of agent HLGB-3 (no component poly-1,3-propylene chloride pyridinium chloride during preparation), 25 parts of liquid lubricant HLR-2, 25 parts of lubrication inhibitor HLRH-3, solid lubricant for drilling fluid (RH203 -1) 25 parts, 10 parts of inhibitor HLY-3, 75 parts of KCl, 2.5 parts of gel plugging agent HLN-1, 13 parts of superfine calcium carbonate powder, weighting agent, the amount of weighting agent should meet the mud density after adjustment 1.40g / cm 3 requirements. The main c...

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Abstract

The invention discloses a three-protection-function water-base drilling fluid system. Raw materials comprise 1000 parts of tap water, 40-50 parts of bentonite, 2-3 parts of sodium carbonate, 0.5-1 part of sodium hydroxide, 3-5 parts of coating agents HLBE-2, 6-8 parts of filtrate reducers HLJ-1, 15-20 parts of filtrate reducers HLJ-6, 5-7 parts of polyanionic cellulose PAC-LV, 5-10 parts of high-temperature salt-resistant filtrate reducer HLKY-2, 20-25 parts of wall-fixing agents HLGB-3, 20-25 parts of liquid lubricants HLR-2, 20-25 parts of lubrication inhibitors HLRH-3, 20-25 parts of drilling fluid solid lubricants, 5-10 parts of inhibitors HLY-3, 70-80 parts of KCl, 2-2. 5 parts of gel plugging agents HLN-1, 10-15 parts of superfine calcium carbonate powder, and a weighting agent. Thethree-water-retention-base drilling fluid system has good inhibition performance and good plugging performance, and is used for drilling of mud rock-siltstone inclined shaft sections and horizontal sections. Therefore, a problem that the well wall is prone to instability in the drilling process of water-based drilling fluid is solved, and the three-protection function of protecting the well wall,protecting an oil-gas layer and protecting the environment is achieved.

Description

technical field [0001] The invention relates to a petroleum drilling fluid system, in particular to a three-retaining water-based drilling fluid system, and also relates to a preparation method of the three-retaining water-based drilling fluid system. Background technique [0002] As oilfield development enters the middle and late stages, many old wells have water coning, causing most of the oil wells to be flooded. The flat well drilling method communicates the reservoirs around the wellbore, which increases the difficulty of drilling. The Minghuazhen Formation, Dongying Formation, and Shahejie Formation in the Jizhong Depression are dominated by variegated mudstone and fine siltstone, while drilling in mudstone formations often causes complex wellbore instability, because mudstone is prone to hydration when exposed to water. Dispersion and expansion, thereby reducing rock strength and causing well wall collapse. Therefore, the requirements for the suppression of drilling...

Claims

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Application Information

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IPC IPC(8): C09K8/24C09K8/03C08F220/56C08F220/54C08F212/14C08F226/02C08F251/00C08B11/12C08F283/06
CPCC08B11/12C08F220/56C08F251/00C08F283/06C09K8/03C09K8/24C09K2208/12C09K2208/34C08F220/54C08F212/24C08F226/02
Inventor 陈利赵秀平
Owner 石家庄华莱鼎盛科技有限公司
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