Method for blocking strong water washing by injecting blocking agent into thick reservoir by means of fracture
A technology of plugging agent and thick oil layer, applied in the direction of sealing/isolation, earthwork drilling and production, wellbore/well parts, etc., it can solve the problem of poor plugging effect, short plugging distance and weak plugging of strong water washing strips and other problems, to achieve the effects of obvious plugging effect, decreased liquid production, and low equipment damage
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[0047] Example 1
[0048] The present invention will be further explained in conjunction with the B1-6-P68 well of a type of thick oil layer in Daqing Placanticline.
[0049] Well B1-6-P68 is an old production well after polymer flooding. It was completed on October 10, 1996. The oil-water well spacing of this well is 175m, the well depth is 1166.71m, the depth of the perforated section is 1068.9~1097.7m, and a total of 9 small layers are shot from the port I1 to the I7, including the port I2.
[0050] (1) Determine the plugging target layer: According to reservoir logging interpretation, water flooding interpretation, fine description, profile test data, coring well data, and production performance data analysis, determine the bottom of the well’s Pu I2 layer at 2.6m or 1074.3 ~1076.9m is a strong water washing strip, which is determined as the target layer for this fracturing plugging construction, and multi-stage long rubber barrels are used for construction control;
[0051] (2) ...
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