JPS6128694A - Chemical fluid composition for repairing pit well - Google Patents
Chemical fluid composition for repairing pit wellInfo
- Publication number
- JPS6128694A JPS6128694A JP14734984A JP14734984A JPS6128694A JP S6128694 A JPS6128694 A JP S6128694A JP 14734984 A JP14734984 A JP 14734984A JP 14734984 A JP14734984 A JP 14734984A JP S6128694 A JPS6128694 A JP S6128694A
- Authority
- JP
- Japan
- Prior art keywords
- chemical fluid
- fluid composition
- well
- weight
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Macromonomer-Based Addition Polymer (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（１）発明の背景
本発明は坑井改修用化学流体組成物に関し、更に詳しく
は高温度下に於ける該組成物のレオ四ジー特性の低下を
抑制することにより―坑井内の停滞物を円滑に地上まで
運搬する能力のある・改良された坑井改修用化学流体組
成物に関する。DETAILED DESCRIPTION OF THE INVENTION (1) Background of the Invention The present invention relates to a chemical fluid composition for well remediation, and more specifically, the present invention relates to a chemical fluid composition for well rehabilitation, and more specifically, by suppressing the deterioration of the rheodynamic properties of the composition under high temperatures. -Regarding an improved chemical fluid composition for well rehabilitation that has the ability to smoothly transport stagnant material in a wellbore to the surface.
近年坑井の掘削技術の進歩は著しく、地層条件に適した
泥水材料と調泥技術の発達により・高温度下で高比重の
維持および泥岩層の水和膨潤を抑制することが可能とな
り、より深い地層まで掘削することが出来るようになっ
た。In recent years, there has been remarkable progress in well drilling technology, and with the development of muddy materials and mud preparation techniques suitable for geological formations, it has become possible to maintain high specific gravity under high temperatures and suppress hydration swelling of mudstone layers. It became possible to excavate to deep strata.
坑井の完成後、油の生産が実施されるが、泥水やセメン
トスラリーのｒ過液が粘土鉱物の含まれている貯留層に
浸入していたりすると・粘土鉱物が膨潤して孔隙を塞ぎ
浸透率が低下していたり・或いは貯留層が十分に固結し
てない砂岩の場合。After the well is completed, oil production is carried out, but if muddy water or cement slurry filtrate has entered the reservoir layer containing clay minerals, the clay minerals will swell and close the pores, causing infiltration. For sandstones where the ratio is low or the reservoir is not sufficiently consolidated.
油やガスの産出に付随して砂が坑井内に流れ込みケーシ
ング内に停滞して産出能力を低下させたりする等の生産
性障害が発生することがある。これら生産性障害の対策
として、各種改修作業を実施するが、この場合フォーメ
ーションダメージ（ｆｏｒｍａｔｉｏｎ ｄａｍａｇｅ
）を最小限にするため―掘削泥水のよ５なベントナイ
トやパライト等の固形分を含まない坑井改修用化学流体
が最近賞月されてきた。即ち従来の坑井改修用化学流体
組成物は通常地圧を制御するに十分な比重を得るための
塩類。Accompanying the production of oil or gas, sand may flow into the wellbore and become stagnant within the casing, resulting in productivity problems such as a reduction in production capacity. As a countermeasure to these productivity problems, various repair works are carried out, but in this case, formation damage (formation damage)
) - Chemical fluids for well workover that do not contain solids such as bentonite and pallite, which are similar to drilling mud, have recently been promoted. That is, conventional well workover chemical fluid compositions typically include salts to obtain a specific gravity sufficient to control ground pressure.
増粘剤として塩類の影響を受は難いヒドロキシエチルセ
ルロースおよび必要に応じて各種薬剤が水中に溶解もし
くは懸濁されているものである。As a thickener, hydroxyethyl cellulose, which is not easily affected by salts, and various chemicals as necessary are dissolved or suspended in water.
しかしながら、坑井が深くなるに従い坑井内の温度は高
くなる傾向にあり、従来の坑井改修用化学流体組成物は
そのレオロジー特性の低下を生ずることにより・特に坑
井内の停滞物を地上へ運搬する能力が十分発揮できなく
なり９作業時間の遅延や甚しい場合は完全に停滞物を洗
浄し得ない事が起ることが判明した。従って、従来の坑
井改修用化学流体組成物のレオロジー特性の低下を確実
且つ容易に抑制する方法を見い出した時初めて該組成物
の本来の機能を十分に享受することが可能となるのであ
る。However, as the well depth increases, the temperature inside the wellbore tends to increase, and conventional chemical fluid compositions for wellbore work have a tendency to deteriorate their rheological properties, especially when transporting stagnant material in the wellbore to the surface. It has been found that the ability to clean the stagnant material cannot be fully utilized, resulting in a delay of 9 working hours or, in severe cases, the inability to completely clean the stagnant material. Therefore, only when a method of reliably and easily suppressing the deterioration of the rheological properties of conventional chemical fluid compositions for well remediation is discovered, will it be possible to fully enjoy the original functions of the compositions.
（２）発明の概要
１ 本発明は上記の問題点を解決することを目的とる化
合物を含有することを特徴とする坑井改修用化学流体組
成物に係るものである。(2) Summary of the Invention 1 The present invention relates to a chemical fluid composition for well repair, which is characterized by containing a compound intended to solve the above-mentioned problems.
゛後記実施例から明らかなように・本発明による坑井改
修用化学流体組成物は高温下に於けるそのレオロジー特
性の低下が著しく小さいという点において優れており本
来の機能を十分に享受することが可能となる。As is clear from the Examples described below, the chemical fluid composition for well remediation according to the present invention is excellent in that the deterioration of its rheological properties under high temperatures is extremely small, and it can fully enjoy its original functions. becomes possible.
（３）発明の詳細な説明
本発明の坑井改修用化学流体組成物に含まれるＲ，はＣ
ｎＨ２ｎ＋１ （但しｎ ＝ １〜４ ）で示される低
級アルキル基であり、Ｒ１は水素原子・アルカリ金＋１
る。(3) Detailed description of the invention R and C contained in the chemical fluid composition for well rehabilitation of the present invention
It is a lower alkyl group represented by nH2n+1 (where n = 1 to 4), and R1 is a hydrogen atom/alkali gold+1.
本発明の坑井改修用化学流体組成物に含まれる重量％か
ら約０．２重量％、好ましくは約０．００５重量％から
約０．１重量％である。From about 0.2% by weight, preferably from about 0.005% to about 0.1% by weight, contained in the well workover chemical fluid composition of the present invention.
本発明の改良の対象となる従来の坑井改修用化学流体組
成物に含まれる前記した成分およびその量は通常次の通
りである。即ち・ヒドロキシエチルセルロースは、平均
置換モル数１．５以上および１重量％粘度２，０ＯＯＣ
ｐ以上（ブルックフィールド粘度計、集３スピンドル、
３０几ＰＭ、２５℃）であり、該組成物中における濃度
は約０．２重量％から約２重量％である。また、塩類は
塩化カルシウム、臭化カルシウムおよび臭化亜鉛から選
ばれた少なくとも一種の塩類であり、要求される比重（
１，０１以上、好ましくは１．１６〜２．３０）、作業
温度および晶出温度を考慮してその種類および濃度が決
められる。該組成物中における塩類の濃度は約０．０１
重量％から約７０重量％である。さトに、その他各種薬
剤としては消泡剤・防蝕剤・ｐＨ調整剤、充てん剤およ
び懸濁助剤等である。The above-mentioned components and their amounts contained in the conventional chemical fluid composition for well remediation, which is the object of the improvement of the present invention, are generally as follows. That is, hydroxyethylcellulose has an average number of substituted moles of 1.5 or more and a viscosity of 1% by weight of 2.0OOC.
p or more (Brookfield viscometer, collection 3 spindle,
30 °C PM, 25°C), and the concentration in the composition is from about 0.2% to about 2% by weight. In addition, the salts are at least one type of salt selected from calcium chloride, calcium bromide, and zinc bromide, and the required specific gravity (
1.01 or more, preferably 1.16 to 2.30), and its type and concentration are determined in consideration of working temperature and crystallization temperature. The concentration of salts in the composition is about 0.01
% to about 70% by weight. In addition, various other chemicals include antifoaming agents, anticorrosion agents, pH adjusters, fillers, and suspension aids.
本発明の坑井改修用化学流体組成物は一約８０℃以上、
好ましくは約８０℃から約１５０℃の高温下で養生した
後のレオロジー特性会即ち見掛は粘度（ｋＶ）、プラス
チック粘度（ｐｖ、）およびイールドポイン）（ＹＰ）
が従来の組成物に比較して高く、坑井内停滞物を運搬す
る能力に優れている。The chemical fluid composition for well remediation of the present invention has a temperature of about 80°C or higher;
Rheological properties, i.e., apparent viscosity (kV), plastic viscosity (PV), and yield point (YP) after curing at high temperatures, preferably from about 80°C to about 150°C.
is higher than conventional compositions, and has excellent ability to transport stagnant material in wells.
以下、実施例にて説明するが・実際の坑井内に於ける改
修作業は再現性に乏しいため−坑井改修用化学流体組成
物をローラーオプン（ＲｏｌｌｅｒＯｖｅｎ ） Ｊｃ
高高下下養生し、上記レオロジー特性をＦａｎｎ ＶＧ
ｍ、ｅｔｅｒ Ｍｏｄｅｌ ３５で測定（３０℃）シ
。Examples will be explained below. Since reproducibility in actual well remediation work is poor, the chemical fluid composition for well refurbishment was applied to a roller open (RollerOven) Jc
Fann VG
m, eter Measured with Model 35 (30°C).
本発明の坑井改修用化学流体組成物と従来の坑井改修用
化学流体組成物との比較を行った。A comparison was made between the chemical fluid composition for well repair of the present invention and a conventional chemical fluid composition for well repair.
実施例１゜
塩化カルシウム３５重量部・平均置換モル数２．０で１
重量％粘度５，０ＯＯＣＩ）（ブルックフィールド粘度
計、塩４スピンドル−３ＯＲＰＭ、２５℃）のヒドロキ
シエチルセルロース０．６重を部−水６５重量部から成
る従来の坑井改修用化学流体組成物・およびこれにジメ
チルジチオカルバミン酸のＮａ本発明の坑井改修用化学
流体組成物をそれぞれローラーオゾンに１０℃で 時
間養生しレオロジー特性を測定した。結果を表−１に示
す。Example 1゜ Calcium chloride 35 parts by weight, average number of substituted moles 2.0, 1
A conventional well workover chemical fluid composition consisting of 0.6 parts by weight of hydroxyethyl cellulose (wt% viscosity 5,0 OOCI) (Brookfield viscometer, salt 4 spindle - 3 ORPM, 25°C) - 65 parts by weight of water; The chemical fluid composition for well repair of the present invention containing dimethyldithiocarbamic acid (Na) was cured in roller ozone at 10°C for a period of time, and the rheological properties were measured. The results are shown in Table-1.
表−１
実施例２゜
塩化カルシウム３５重量部、実施例１で用いたト同ジヒ
ドロキシエチルセルロース０．５ＭＩｋｍ・水６５重量
部から成る従来の坑井改修用化学流体組成物、およびこ
れにテトラメチルチウラムジス０．０１重量部添加した
本発明の坑井改修用化学流体組成物をそれぞれローラー
オゾンに１２０℃で１６時間養生しレオロジー特性を測
定した。結果を表−２に示す。Table 1 Example 2 A conventional chemical fluid composition for well rehabilitation consisting of 35 parts by weight of calcium chloride, 0.5 MI km of the same dihydroxyethyl cellulose used in Example 1 and 65 parts by weight of water, and tetramethylthiuram. Each of the chemical fluid compositions for well repair of the present invention containing 0.01 part by weight of dichloromethane was cured in a roller ozone at 120° C. for 16 hours, and the rheological properties were measured. The results are shown in Table-2.
表−２
実施例３゜
塩化カルシウム３５重量部、実施例１で用いたト同ジヒ
ドロキシエチルセルロースｏ、ｓ重ｉｔ部・水６５重量
部から成る従来の坑井改修用化学流体組成物、およびこ
れにテトラメチルチウラムモノ重量部添加した本発明の
坑井改修用化学流体組成物をそれぞれローラーオゾンに
１１０℃で３２時間養生しレオロジー特性を測定した。Table 2 Example 3 A conventional chemical fluid composition for well repair consisting of 35 parts by weight of calcium chloride, 65 parts by weight of the same dihydroxyethyl cellulose used in Example 1, and 65 parts by weight of water, and Each of the chemical fluid compositions for well remediation of the present invention to which a mono weight part of tetramethylthiuram was added was cured in a roller ozone at 110° C. for 32 hours, and the rheological properties were measured.
結果を表−３に示す。The results are shown in Table-3.
表−３
実施例４゜
塩化カルシウム３５重量部・実施例１で用いたと同じヒ
ドロキシエチルセルロース 重ｉｓ。Table 3 Example 4 35 parts by weight of calcium chloride, same hydroxyethylcellulose as used in Example 1.
水６５重量部から成る従来の坑井改修用化学流体組成物
、およびこれにジエチルジチオカルバミン酸本発明の坑
井改修用化学流体組成物をそれぞれローラーオゾンに１
１０℃、１６時間養生しレオロジー特性を測定した。結
果を表−４に示す。A conventional chemical fluid composition for well work-up consisting of 65 parts by weight of water, and a chemical fluid composition for well work-up of the present invention of diethyldithiocarbamic acid were added to this in roller ozone.
After curing at 10°C for 16 hours, the rheological properties were measured. The results are shown in Table 4.
表−４
実施例５゜
塩化カルシウム２７．５重量部、臭化カルシウム２７．
２重量部−実施例１で用いたと同じヒドロキシエチルセ
ル四−ス０．７重量部および水４５．３重量部から成る
従来の坑井改修用化学流体組成物・およびこれにテトラ
エチルチウラムモノスルフィ部を添加した本発明の坑井
改修用化学流体組成物をそれぞれ四−ラーオブンに１２
０℃、２４時間養生し流体レオロジー特性を測定した。Table 4 Example 5゜Calcium chloride 27.5 parts by weight, calcium bromide 27.
2 parts by weight - A conventional well remediation chemical fluid composition consisting of 0.7 parts by weight of the same hydroxyethyl cellulose as used in Example 1 and 45.3 parts by weight of water, and this with a part of tetraethylthiuram monosulfuric acid. The chemical fluid composition for well remediation of the present invention, which has been added with
After curing at 0°C for 24 hours, fluid rheological properties were measured.
結果を表−５に示す。The results are shown in Table-5.
表 −５
以上の実施例から９本発明の坑井改修用化学流体組成物
は従来の坑井改修用化学流体組成物よりレオロジー特性
が優れていることが明らかである。Table 5 From the above examples, it is clear that the chemical fluid composition for well remediation of the present invention has better rheological properties than the conventional chemical fluid composition for well remediation.
Claims (1)
合物を 含有することを特徴とする坑井改修用化学流体組成物。[Claims] A chemical fluid composition for well repair, characterized by containing a compound represented by the general formula ▲There are mathematical formulas, chemical formulas, tables, etc.▼.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734984A JPS6128694A (en) | 1984-07-16 | 1984-07-16 | Chemical fluid composition for repairing pit well |
| US06/755,506 US4661266A (en) | 1984-07-16 | 1985-07-16 | Completion and workover fluids |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14734984A JPS6128694A (en) | 1984-07-16 | 1984-07-16 | Chemical fluid composition for repairing pit well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6128694A true JPS6128694A (en) | 1986-02-08 |
Family
ID=15428170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14734984A Pending JPS6128694A (en) | 1984-07-16 | 1984-07-16 | Chemical fluid composition for repairing pit well |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6128694A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02194044A (en) * | 1989-01-24 | 1990-07-31 | Idemitsu Kosan Co Ltd | Extrusion molding material and production of molded article thereof |
| US6444736B1 (en) | 1998-04-24 | 2002-09-03 | Chisso Corporation | Flame retardant polyolefin composition |
| US6515037B2 (en) | 2000-02-29 | 2003-02-04 | Chisso Corporation | Polypropylene base resin composition for foam-molding, foamed article using the same composition, production process for the same foamed article and foam-molded product using the foamed-article |
| US6710130B2 (en) | 2001-03-30 | 2004-03-23 | Chisso Corporation | Propylene polymer composition and its foam moldings |
-
1984
- 1984-07-16 JP JP14734984A patent/JPS6128694A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02194044A (en) * | 1989-01-24 | 1990-07-31 | Idemitsu Kosan Co Ltd | Extrusion molding material and production of molded article thereof |
| US6444736B1 (en) | 1998-04-24 | 2002-09-03 | Chisso Corporation | Flame retardant polyolefin composition |
| US6515037B2 (en) | 2000-02-29 | 2003-02-04 | Chisso Corporation | Polypropylene base resin composition for foam-molding, foamed article using the same composition, production process for the same foamed article and foam-molded product using the foamed-article |
| US6710130B2 (en) | 2001-03-30 | 2004-03-23 | Chisso Corporation | Propylene polymer composition and its foam moldings |
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