A water-based fluid loss additive with temperature resistance up to 220 ℃ was prepared by using acrylamide(AM)，allyl polyethylene ether(APEG-1000)，sodium p-styrenesulfonate(SSS)，and octadecyl dimethyl allyl ammonium chloride(DMAAC-18) as pol...

At present, oil and gas exploration and development are making significant progress in areas such as ultra deep and unconventional formations. Drilling well control faces a series of safety challenges such as low prediction accuracy of spec...