Sand control method and sand control material for artificial well wall
A technology of artificial well wall and materials, applied in chemical instruments and methods, earthwork drilling and production, wellbore/well components, etc., can solve the problems of oil and gas well production decline, permeability reduction, aging, etc.
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Embodiment 1
[0051] Well Zhuangqian 12K in Liuguanzhuang Oilfield
[0052] (1) Situation description: The structural location is the north fault nose of Well Zhuangqian 2 in the Yangerzhuang nose-shaped structural belt of the Huanghua Depression. The date is 2014-10-11. The completed drilling depth is 1655m, and the artificial well bottom is 1650m.
[0053] (2) There are problems
[0054] The well was self-blowing for one year, and then turned to pumping for one month to produce sand, and the well-washing leakage was serious, indicating that the oil layer of the well was short.
[0055] (3) Sand control process
[0056] Preparation of materials
[0057] The guide fluid includes the following components by weight: 2.5% sodium chloride, 1% calcium chloride, 0.5% magnesium chloride, 0.2% dinonylphenol polyoxyethylene ether, N-oleoyl-N-methyl The mass concentration of sodium taurine is 0.3%, the mass concentration of dimethyldiallylammonium chloride-acrylamide copolymer is 0.5%, and the b...
Embodiment 2
[0078] Well Zhao 41-23X in fault block Zhao 108 in Huabei Oilfield
[0079] (1) Situation description: The structural location is Zhao 108 fault block, the completed drilling depth is 1878m, and the original artificial well bottom is 1866m.
[0080] (2) There are problems
[0081] The well has serious sand production, and well washing leakage, indicating that the oil layer of the well is short.
[0082] (3) Sand control process
[0083] Preparation of materials
[0084] The guide fluid includes the following components by weight: 2.5% sodium chloride, 1% calcium chloride, 0.5% magnesium chloride, 0.5% polyoxyethylene dinonylphenol, N-oleoyl-N-methyl bovine The mass concentration of sodium sulfonate is 0.6%, the mass concentration of dimethyl diallyl ammonium chloride-acrylamide copolymer is 1.5%, and the balance is water.
[0085] The sand-carrying liquid includes the following components in terms of weight content: dimethyl diallyl ammonium chloride-acrylamide copolymer 5...
Embodiment 3
[0105] Well A44h in CNOOC JX1-1 Oilfield
[0106] (1) Description of the situation:
[0107] Well A44h is a horizontal well, producing oil group II of the second member of the Shahejie Formation and oil group I of the third member of the Shahejie Formation. The 5-1 / 2″ bridge-type composite screen was completed. The effective oil layer thickness in the screen section was 127.6m, and the drilling depth was 1941m.
[0108] (2) There are problems
[0109] The screen is broken. When the well was completed, a 5 1 / 2" outer bridge high-quality screen was used for sand control. The sand samples taken during the pump inspection operation were tested and found to be formation sand with a particle size of 214um. Therefore, it is judged that the sand control screen of this well has been damaged. .
[0110] (3) Sand control process
[0111] The guide fluid includes the following components by weight: 0.5% sodium chloride, 1% calcium chloride, 0.5% magnesium chloride, 3.5% dinonylphenol ...
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