Method for evaluating adaptability of polymer gel profile control agent to oil reservoir
A technology of polymer and profile control agent, which is applied in the field of petroleum drilling and production, and can solve the problems of slow gelation speed, prolongation of gelation time, hindering the contact between polymer molecules and crosslinking agent molecules, etc.
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Embodiment 1
[0079] For the reservoir formation to be tested with a permeability of 200md, this embodiment evaluates the reservoir adaptability of the polymer gel profile control agent, and the specific process is as follows:
[0080] Step 1. Prepare multiple cemented artificial cores with a size of 4.5cm×4.5cm×30cm to simulate the 200md oil reservoir formation to be tested, and install a pressure sensor at the front end of each cemented artificial core.
[0081] Step2, preparing formation aqueous solution with a concentration of 4500ppm, the salinity of the formation aqueous solution is the same as the salinity of the 200md oil reservoir formation to be tested.
[0082] Step3, prepare a polymer gel profile control agent with a concentration of 1000ppm, wherein the volume ratio of polymer pure liquid and crosslinking agent is 100:1, and the polymer is partially hydrolyzed polyacrylamide with a molecular weight of about 2000×10 4 .
[0083] Use the currently prepared polymer gel profile co...
Embodiment 2
[0101] For the reservoir formation to be tested with a permeability of 1000 md, this embodiment evaluates the reservoir adaptability of the polymer gel profile control agent. The specific process can refer to Step 1-6 in Embodiment 1, and will not be repeated here.
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