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na2sio3-kcl anti-collapse drilling fluid and preparation method thereof

A technology of drilling fluid and anti-slump agent, which is applied in the field of oil drilling, can solve the problems that affect the smooth progress of drilling operations and logging, the increase of drilling costs, and the extension of construction period, so as to solve the technical problems of preventing mud and shale collapse and achieve significant economic benefits , cost reduction effect

Active Publication Date: 2016-03-09
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Wellbore stability in shale has always been a worldwide problem that plagues oil drilling. With the development of the oil industry and the increasing demand for oil, the direction of exploration and development of oil and gas fields has been continuously broadened, gradually developing towards new blocks, new formations and deep formations. In the construction of deep wells, especially deep exploration wells, when drilling in strongly hydrated and dispersed shale formations, downhole accidents and complex situations such as diameter shrinkage, well collapse, drill sticking, and large section reaming occur frequently, seriously affecting drilling operations The smooth progress of well logging and later stage led to prolongation of construction period, decline of drilling quality, increase of drilling cost, and decrease of drilling benefit. It can be seen that the problem of well wall stability has become a technical bottleneck restricting deep well and ultra-deep well drilling operations. Therefore, the development of a deep well, The anti-collapse drilling fluid for ultra-deep wells is the key that current technicians must break through

Method used

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  • na2sio3-kcl anti-collapse drilling fluid and preparation method thereof
  • na2sio3-kcl anti-collapse drilling fluid and preparation method thereof
  • na2sio3-kcl anti-collapse drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] 1) Add bentonite to water at a concentration of 32g / l, and add 0.2% Na 2 CO 3 , and pre-hydrated for 24 hours under stirring conditions to obtain bentonite slurry;

[0034] 2) adding 0.5wt% KOH to the bentonite slurry to adjust its pH=9.5;

[0035] 3) Add Redu1 type fluid loss control agent produced by Beijing Peikang Jiaye Technology Development Co., Ltd., which accounts for 1.7% of the bentonite slurry mass into the slurry finally obtained in step 2);

[0036] 4) Add LHJS-3 type fluid loss reducer produced by Shandong Luhai Drilling Technology Co., Ltd., produced by Qingdao Sanli Chemical Technology Co., Ltd., which all account for 2% of the bentonite slurry mass into the slurry finally obtained in step 3). The FD-1 type fluid loss reducer and the KJAN type fluid loss reducer produced by Shijiazhuang Hualai Dingsheng Technology Co., Ltd.; stir for 10 minutes;

[0037] 5) Add NFA-25 anti-slump agent produced by Beijing Peikang Jiaye Technology Development Co., Ltd.,...

Embodiment 2

[0047] 1) Add bentonite to water at a concentration of 20g / l, and add 0.12% Na 2 CO 3 , and pre-hydrated for 24 hours under stirring conditions to obtain bentonite slurry;

[0048] 2) Add 0.6wt% NaOH to the bentonite slurry to adjust its pH=11.5;

[0049]3) Add Redu1 type fluid loss control agent produced by Beijing Peikang Jiaye Technology Development Co., Ltd., which accounts for 1.2% of the bentonite slurry mass into the slurry finally obtained in step 2);

[0050] 4) Add LHJS-3 type fluid loss control agent produced by Shandong Luhai Drilling Technology Co., Ltd., produced by Qingdao Sanli Chemical Technology Co., Ltd., which all account for 2.5% of the bentonite slurry mass into the slurry finally obtained in step 3). The FD-1 type fluid loss reducer and the KJAN type fluid loss reducer produced by Shijiazhuang Hualai Dingsheng Technology Co., Ltd.; stir for 15 minutes;

[0051] 5) Add NFA-25 anti-slumping agent produced by Beijing Peikang Jiaye Technology Development ...

Embodiment 3

[0060] 1) Add bentonite to water at a concentration of 26g / l, and add 0.15% Na 2 CO 3 , and pre-hydrated for 24 hours under stirring conditions to obtain bentonite slurry;

[0061] 2) Add 0.5wt% NaOH to the bentonite slurry to adjust its pH=13.7;

[0062] 3) Add Redu1 type fluid loss control agent produced by Beijing Peikang Jiaye Technology Development Co., Ltd., which accounts for 1.5% of the bentonite slurry mass into the slurry finally obtained in step 2);

[0063] 4) Add LHJS-3 type fluid loss control agent produced by Shandong Luhai Drilling Technology Co., Ltd., produced by Qingdao Sanli Chemical Technology Co., Ltd., which all account for 2.2% of the bentonite slurry mass into the slurry finally obtained in step 3). The FD-1 type fluid loss reducer and the KJAN type fluid loss reducer produced by Shijiazhuang Hualai Dingsheng Technology Co., Ltd.; stir for 12 minutes;

[0064] 5) Add NFA-25 anti-slumping agent produced by Beijing Peikang Jiaye Technology Development...

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Abstract

The invention discloses a Na2SiO3-KCl anti-collapse drilling fluid and a preparation method thereof. The Na2SiO3-KCl anti-collapse drilling fluid consists of the following substances in bentonite slurry in percentage by mass: 0.12-0.2% of Na2CO3, 0.2-0.9% of NaOH or KOH, 1.2-1.7% of filtrate reducer 1, 1.5-2.5% of filtrate reducer 2, 1.5-2.5% of filtrate reducer 3, 1.5-2.5% of filtrate reducer 4, 1.5-2.5% of anti-collapse agent, 6-9% of KCl, 2.5-3.5% of Na2SiO3 and 0-60% of inert weighting agent, wherein the bentonite slurry is prepared by the steps of mixing bentonite and water based on the bentonite content of 20-32g / l, and adding Na2CO3 accounting for 0.12-0.2% of the total mass of the two. The preparation method of the drilling fluid is characterized by uniformly mixing the components in sequence according to proportions. The drilling fluid facilitates field maintenance, has stable performance, can balance the formation pressure of a high-pressure interval, and is a low-cost and highly environment-friendly ideal anti-collapse drilling fluid.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a Na 2 SiO 3 - KCl anti-slump drilling fluid and preparation method thereof. Background technique [0002] Wellbore stability in shale has always been a worldwide problem that plagues oil drilling. With the development of the oil industry and the increasing demand for oil, the direction of exploration and development of oil and gas fields has been continuously broadened, gradually developing towards new blocks, new formations and deep formations. In the construction of deep wells, especially deep exploration wells, when drilling in strongly hydrated and dispersed shale formations, downhole accidents and complex situations such as diameter shrinkage, well collapse, drill sticking, and large section reaming occur frequently, seriously affecting drilling operations The smooth progress of well logging and later stage led to prolongation of construction period, decline of drilling qualit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/16
CPCC09K8/16C09K8/20C09K8/22C09K8/24
Inventor 陈永奇吴太胡景东王志明熊亚萍李永华许萍刘丽敏段继红吴宏宾程琳石振江林常茂
Owner BC P INC CHINA NAT PETROLEUM CORP
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