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当(Dang)前(Qian)位(Wei)置(Zhi):(?) 首(Shou)页(Ye) > 自(Zi)生(Sheng)酸(Suan)
1.概(Gai)述(Shu)
所(Suo)谓(Wei)自(Zi)生(Sheng)酸(Suan)酸(Suan)化(Hua),(?)就(Jiu)是(Shi)利(Li)用(Yong)一(Yi)些(Xie)化(Hua)合(He)物(Wu)能(Neng)在(Zai)地(Di)层(Ceng)条(Tiao)件(Jian)下(Xia)以(Yi)可(Ke)控(Kong)制(Zhi)的(De)速(Su)度(Du)产(Chan)生(Sheng)有(You)机(Ji)或(Huo)无(Wu)机(Ji)强(Qiang)酸(Suan),(?)然(Ran)后(Hou)独(Du)自(Zi)与(Yu)碳(Tan)酸(Suan)岩(Yan)、(?)灰(Hui)岩(Yan)(或(Huo)跟(Gen)含(Han)氟(Fu)离(Li)子(Zi)溶(Rong)液(Ye)生(Sheng)成(Cheng)氢(Qing)氟(Fu)酸(Suan)与(Yu)砂(Sha)岩(Yan)、(?)火(Huo)成(Cheng)岩(Yan)等(Deng))地(Di)层(Ceng)反(Fan)应(Ying),(?)用(Yong)于(Yu)地(Di)层(Ceng)深(Shen)部(Bu)酸(Suan)化(Hua)、(?)酸(Suan)压(Ya)的(De)一(Yi)种(Zhong)增(Zeng)产(Chan)工(Gong)艺(Yi)技(Ji)术(Shu)。(?)
其(Qi)根(Gen)本(Ben)机(Ji)理(Li)在(Zai)于(Yu)降(Jiang)低(Di)酸(Suan)蚀(Shi)速(Su)率(Lu)、(?)延(Yan)缓(Huan)酸(Suan)岩(Yan)反(Fan)应(Ying)速(Su)度(Du),(?)延(Yan)长(Chang)酸(Suan)化(Hua)半(Ban)径(Jing)、(?)扩(Kuo)大(Da)酸(Suan)液(Ye)穿(Chuan)透(Tou)距(Ju)离(Li)。(?)
2.特(Te)点(Dian)
1. WLX自(Zi)生(Sheng)酸(Suan)体(Ti)系(Xi)前(Qian)后(Hou)送(Song)检(Jian)两(Liang)次(Ci),(?)分(Fen)别(Bie)在(Zai)90℃(?)、(?)130℃(?)相(Xiang)对(Dui)密(Mi)闭(Bi)条(Tiao)件(Jian)下(Xia)的(De)酸(Suan)浓(Nong)度(Du)为(Wei)12.4%和(He)16.5%,(?)酸(Suan)浓(Nong)度(Du)相(Xiang)对(Dui)一(Yi)般(Ban),(?)高(Gao)温(Wen)生(Sheng)成(Cheng)H+离(Li)子(Zi)时(Shi)间(Jian)比(Bi)较(Jiao)合(He)适(Shi),(?)需(Xu)要(Yao)进(Jin)步(Bu)一(Yi)提(Ti)高(Gao)酸(Suan)浓(Nong)度(Du);
2.WLX自(Zi)生(Sheng)酸(Suan)在(Zai)低(Di)温(Wen)25℃(?)、(?)30℃(?)和(He)40℃(?)下(Xia)放(Fang)置(Zhi),(?)体(Ti)系(Xi)PH值(Zhi)由(You)7.0降(Jiang)到(Dao)1.0的(De)时(Shi)间(Jian)分(Fen)别(Bie)为(Wei)48、(?)36和(He)30小(Xiao)时(Shi),(?)显(Xian)示(Shi)低(Di)温(Wen)稳(Wen)定(Ding)性(Xing)较(Jiao)好(Hao),(?)但(Dan)现(Xian)场(Chang)最(Zui)好(Hao)分(Fen)灌(Guan)盛(Sheng)装(Zhuang)A、(?)B剂(Ji),(?)施(Shi)工(Gong)泵(Beng)注(Zhu)时(Shi)再(Zai)混(Hun)液(Ye)使(Shi)用(Yong),(?)则(Ze)更(Geng)利(Li)于(Yu)保(Bao)护(Hu)井(Jing)下(Xia)管(Guan)柱(Zhu);
3.在(Zai)酸(Suan)岩(Yan)反(Fan)应(Ying)过(Guo)程(Cheng)中(Zhong),(?)随(Sui)时(Shi)间(Jian)延(Yan)长(Chang),(?)与(Yu)普(Pu)通(Tong)胶(Jiao)凝(Ning)酸(Suan)体(Ti)系(Xi)相(Xiang)比(Bi),(?)WLX自(Zi)生(Sheng)酸(Suan)体(Ti)系(Xi)的(De)酸(Suan)浓(Nong)度(Du)降(Jiang)低(Di)更(Geng)缓(Huan)慢(Man),(?)且(Qie)缓(Huan)慢(Man)程(Cheng)度(Du)较(Jiao)明(Ming)显(Xian),(?)使(Shi)相(Xiang)同(Tong)量(Liang)岩(Yan)芯(Xin)反(Fan)应(Ying)彻(Che)底(Di)所(Suo)需(Xu)时(Shi)间(Jian)长(Chang)得(De)多(Duo),(?)在(Zai)一(Yi)定(Ding)程(Cheng)度(Du)上(Shang)可(Ke)增(Zeng)大(Da)酸(Suan)蚀(Shi)作(Zuo)用(Yong)距(Ju)离(Li),(?)加(Jia)大(Da)酸(Suan)压(Ya)效(Xiao)果(Guo);
4.与(Yu)普(Pu)通(Tong)胶(Jiao)凝(Ning)酸(Suan)相(Xiang)比(Bi),(?)WLX自(Zi)生(Sheng)酸(Suan)与(Yu)岩(Yan)芯(Xin)反(Fan)应(Ying)后(Hou)的(De)岩(Yan)芯(Xin)表(Biao)面(Mian)凹(Ao)凸(Tu)不(Bu)平(Ping),(?)压(Ya)裂(Lie)后(Hou)能(Neng)更(Geng)好(Hao)支(Zhi)撑(Cheng)裂(Lie)缝(Feng),(?)可(Ke)增(Zeng)大(Da)裂(Lie)缝(Feng)的(De)导(Dao)流(Liu)能(Neng)力(Li);
3.参(Can)数(Shu)
根(Gen)据(Ju)碳(Tan)酸(Suan)盐(Yan)岩(Yan)、(?)灰(Hui)岩(Yan)的(De)成(Cheng)分(Fen)特(Te)点(Dian),(?)本(Ben)公(Gong)司(Si)研(Yan)发(Fa)出(Chu)两(Liang)种(Zhong)分(Fen)别(Bie)适(Shi)应(Ying)中(Zhong)低(Di)温(Wen)和(He)中(Zhong)高(Gao)温(Wen)的(De)新(Xin)型(Xing)自(Zi)生(Sheng)HCl体(Ti)系(Xi)WY-1和(He)WY-2。(?)
其(Qi)中(Zhong)WY-1为(Wei)中(Zhong)低(Di)温(Wen)自(Zi)生(Sheng)酸(Suan),(?)适(Shi)应(Ying)50-90℃(?),(?)稳(Wen)定(Ding)性(Xing)一(Yi)般(Ban),(?)由(You)A液(Ye)和(He)B液(Ye)构(Gou)成(Cheng),(?)AB混(Hun)合(He)后(Hou),(?)在(Zai)中(Zhong)低(Di)温(Wen)下(Xia)能(Neng)释(Shi)放(Fang)出(Chu)HCl,(?)反(Fan)应(Ying)速(Su)度(Du)如(Ru)下(Xia)表(Biao):(?)
放(Fang)置(Zhi)时(Shi)间(Jian)(h) |
0.25 |
0.5 |
1 |
2 |
4 |
12 |
24 |
48 |
|
不(Bu)同(Tong) 温(Wen)度(Du) 下(Xia)PH /HCl (%) |
17℃(?) |
3.0 |
2.0 |
1.5 |
1.0 |
0.5 |
0.5 |
7.46 |
7.85 |
40℃(?) |
1.5 |
1.0 |
0.5 |
7.55 |
7.59 |
8.92 |
9.31 |
9.05 |
|
50℃(?) |
1.0 |
0.5 |
6.38 |
7.66 |
7.98 |
11.21 |
—(?)—(?) |
—(?)—(?) |
|
90℃(?) |
9.42 |
9.59 |
12.38 |
11.58 |
12.51 |
6.68 |
—(?)—(?) |
—(?)—(?) |
WY-1达(Da)到(Dao)的(De)性(Xing)能(Neng)指(Zhi)标(Biao):(?)
①(?)90℃(?)相(Xiang)对(Dui)密(Mi)闭(Bi)(用(Yong)皮(Pi)筋(Jin)和(He)样(Yang)品(Pin)袋(Dai)密(Mi)封(Feng)烧(Shao)杯(Bei))条(Tiao)件(Jian)下(Xia)的(De)HCl酸(Suan)浓(Nong)度(Du)最(Zui)高(Gao)可(Ke)达(Da)15.75%;
②(?)低(Di)温(Wen)稳(Wen)定(Ding)性(Xing)一(Yi)般(Ban),(?)要(Yao)求(Qiu)分(Fen)液(Ye)灌(Guan)装(Zhuang)现(Xian)场(Chang)混(Hun)合(He)施(Shi)工(Gong);
③(?)酸(Suan)岩(Yan)反(Fan)应(Ying)时(Shi)间(Jian)比(Bi)普(Pu)通(Tong)凝(Ning)胶(Jiao)酸(Suan)延(Yan)长(Chang)一(Yi)倍(Bei)以(Yi)上(Shang);
④(?)酸(Suan)岩(Yan)反(Fan)应(Ying)后(Hou)岩(Yan)芯(Xin)表(Biao)面(Mian)凹(Ao)凸(Tu)不(Bu)平(Ping),(?)大(Da)大(Da)提(Ti)高(Gao)裂(Lie)缝(Feng)导(Dao)流(Liu)能(Neng)力(Li);
⑤(?)J100℃(?)=8.5704×(?)10-7·(?)C1.0013;
⑥(?)J变(Bian)温(Wen)=3.199×(?)10-4e(-18290.69/RT)·(?)C1.0013;
⑦(?)体(Ti)系(Xi)的(De)H+传(Chuan)质(Zhi)系(Xi)数(Shu)与(Yu)反(Fan)应(Ying)速(Su)度(Du)成(Cheng)正(Zheng)比(Bi),(?)100℃(?)、(?)120℃(?)、(?)140℃(?)时(Shi)wy-1的(De)传(Chuan)质(Zhi)系(Xi)数(Shu)分(Fen)别(Bie)为(Wei)2.652×(?)10-6、(?)4.411×(?)10-6、(?)6.838×(?)10-6;
⑧(?)wy-1体(Ti)系(Xi)与(Yu)胶(Jiao)凝(Ning)酸(Suan)具(Ju)有(You)同(Tong)等(Deng)的(De)酸(Suan)化(Hua)改(Gai)造(Zao)能(Neng)力(Li)。(?)